{ "contractName": "Token", "abi": [ { "anonymous": false, "inputs": [ { "indexed": true, "internalType": "address", "name": "owner", "type": "address" }, { "indexed": true, "internalType": "address", "name": "spender", "type": "address" }, { "indexed": false, "internalType": "uint256", "name": "value", "type": "uint256" } ], "name": "Approval", "type": "event" }, { "anonymous": false, "inputs": [ { "indexed": true, "internalType": "address", "name": "from", "type": "address" }, { "indexed": true, "internalType": "address", "name": "to", "type": "address" }, { "indexed": false, "internalType": "uint256", "name": "value", "type": "uint256" } ], "name": "Transfer", "type": "event" }, { "inputs": [], "name": "name", "outputs": [ { "internalType": "string", "name": "", "type": "string" } ], "stateMutability": "view", "type": "function" }, { "inputs": [], "name": "symbol", "outputs": [ { "internalType": "string", "name": "", "type": "string" } ], "stateMutability": "view", "type": "function" }, { "inputs": [], "name": "decimals", "outputs": [ { "internalType": "uint8", "name": "", "type": "uint8" } ], "stateMutability": "view", "type": "function" }, { "inputs": [], "name": "totalSupply", "outputs": [ { "internalType": "uint256", "name": "", "type": "uint256" } ], "stateMutability": "view", "type": "function" }, { "inputs": [ { "internalType": "address", "name": "account", "type": "address" } ], "name": "balanceOf", "outputs": [ { "internalType": "uint256", "name": "", "type": "uint256" } ], "stateMutability": "view", "type": "function" }, { "inputs": [ { "internalType": "address", "name": "recipient", "type": "address" }, { "internalType": "uint256", "name": "amount", "type": "uint256" } ], "name": "transfer", "outputs": [ { "internalType": "bool", "name": "", "type": "bool" } ], "stateMutability": "nonpayable", "type": "function" }, { "inputs": [ { "internalType": "address", "name": "owner", "type": "address" }, { "internalType": "address", "name": "spender", "type": "address" } ], "name": "allowance", "outputs": [ { "internalType": "uint256", "name": "", "type": "uint256" } ], "stateMutability": "view", "type": "function" }, { "inputs": [ { "internalType": "address", "name": "spender", "type": "address" }, { "internalType": "uint256", "name": "amount", "type": "uint256" } ], "name": "approve", "outputs": [ { "internalType": "bool", "name": "", "type": "bool" } ], "stateMutability": "nonpayable", "type": "function" }, { "inputs": [ { "internalType": "address", "name": "sender", "type": "address" }, { "internalType": "address", "name": "recipient", "type": "address" }, { "internalType": "uint256", "name": "amount", "type": "uint256" } ], "name": "transferFrom", "outputs": [ { "internalType": "bool", "name": "", "type": "bool" } ], "stateMutability": "nonpayable", "type": "function" }, { "inputs": [ { "internalType": "address", "name": "spender", "type": "address" }, { "internalType": "uint256", "name": "addedValue", "type": "uint256" } ], "name": "increaseAllowance", "outputs": [ { "internalType": "bool", "name": "", "type": "bool" } ], "stateMutability": "nonpayable", "type": "function" }, { "inputs": [ { "internalType": "address", "name": "spender", "type": "address" }, { "internalType": "uint256", "name": "subtractedValue", "type": "uint256" } ], "name": "decreaseAllowance", "outputs": [ { "internalType": "bool", "name": "", "type": "bool" } ], "stateMutability": "nonpayable", "type": "function" } ], "metadata": 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{IERC20-allowance}.\"},\"approve(address,uint256)\":{\"details\":\"See {IERC20-approve}. Requirements: - `spender` cannot be the zero address.\"},\"balanceOf(address)\":{\"details\":\"See {IERC20-balanceOf}.\"},\"decimals()\":{\"details\":\"Returns the number of decimals used to get its user representation.\"},\"decreaseAllowance(address,uint256)\":{\"details\":\"Atomically decreases the allowance granted to `spender` by the caller. This is an alternative to {approve} that can be used as a mitigation for problems described in {IERC20-approve}. Emits an {Approval} event indicating the updated allowance. Requirements: - `spender` cannot be the zero address. - `spender` must have allowance for the caller of at least `subtractedValue`.\"},\"increaseAllowance(address,uint256)\":{\"details\":\"Atomically increases the allowance granted to `spender` by the caller. This is an alternative to {approve} that can be used as a mitigation for problems described in {IERC20-approve}. Emits an {Approval} event indicating the updated allowance. Requirements: - `spender` cannot be the zero address.\"},\"name()\":{\"details\":\"Returns the name of the token.\"},\"symbol()\":{\"details\":\"Returns the symbol of the token, usually a shorter version of the name.\"},\"totalSupply()\":{\"details\":\"See {IERC20-totalSupply}.\"},\"transfer(address,uint256)\":{\"details\":\"See {IERC20-transfer}. Requirements: - `recipient` cannot be the zero address. - the caller must have a balance of at least `amount`.\"},\"transferFrom(address,address,uint256)\":{\"details\":\"See {IERC20-transferFrom}. Emits an {Approval} event indicating the updated allowance. This is not required by the EIP. See the note at the beginning of {ERC20}; Requirements: - `sender` and `recipient` cannot be the zero address. - `sender` must have a balance of at least `amount`. - the caller must have allowance for `sender`'s tokens of at least 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"functionName": { "name": "cleanup_t_address", "nodeType": "YulIdentifier", "src": "13088:17:20" }, "nodeType": "YulFunctionCall", "src": "13088:24:20" } ], "functionName": { "name": "eq", "nodeType": "YulIdentifier", "src": "13078:2:20" }, "nodeType": "YulFunctionCall", "src": "13078:35:20" } ], "functionName": { "name": "iszero", "nodeType": "YulIdentifier", "src": "13071:6:20" }, "nodeType": "YulFunctionCall", "src": "13071:43:20" }, "nodeType": "YulIf", "src": "13068:2:20" } ] }, "name": "validator_revert_t_address", "nodeType": "YulFunctionDefinition", "parameters": [ { "name": "value", "nodeType": "YulTypedName", "src": "13051:5:20", "type": "" } ], "src": "13015:122:20" }, { "body": { "nodeType": "YulBlock", "src": "13186:79:20", "statements": [ { "body": { "nodeType": "YulBlock", "src": "13243:16:20", "statements": [ { "expression": { "arguments": [ { "kind": "number", "nodeType": "YulLiteral", "src": "13252:1:20", "type": "", "value": "0" }, { "kind": "number", "nodeType": "YulLiteral", "src": "13255:1:20", "type": "", "value": "0" } ], "functionName": { "name": "revert", "nodeType": "YulIdentifier", "src": "13245:6:20" }, "nodeType": "YulFunctionCall", "src": "13245:12:20" }, "nodeType": "YulExpressionStatement", "src": "13245:12:20" } ] }, "condition": { "arguments": [ { "arguments": [ { "name": "value", "nodeType": "YulIdentifier", "src": "13209:5:20" }, { "arguments": [ { "name": "value", "nodeType": "YulIdentifier", "src": "13234:5:20" } ], "functionName": { "name": "cleanup_t_uint256", "nodeType": "YulIdentifier", "src": "13216:17:20" }, "nodeType": "YulFunctionCall", "src": "13216:24:20" } ], "functionName": { "name": "eq", "nodeType": "YulIdentifier", "src": "13206:2:20" }, "nodeType": "YulFunctionCall", "src": "13206:35:20" } ], "functionName": { "name": "iszero", "nodeType": "YulIdentifier", "src": "13199:6:20" }, "nodeType": "YulFunctionCall", "src": "13199:43:20" }, "nodeType": "YulIf", "src": "13196:2:20" } ] }, "name": "validator_revert_t_uint256", "nodeType": "YulFunctionDefinition", "parameters": [ { "name": "value", "nodeType": "YulTypedName", "src": "13179:5:20", "type": "" } ], "src": "13143:122:20" }, { "body": { "nodeType": "YulBlock", "src": "13312:77:20", "statements": [ { "body": { "nodeType": "YulBlock", "src": "13367:16:20", "statements": [ { "expression": { "arguments": [ { "kind": "number", "nodeType": "YulLiteral", "src": "13376:1:20", "type": "", "value": "0" }, { "kind": "number", "nodeType": "YulLiteral", "src": "13379:1:20", "type": "", "value": "0" } ], "functionName": { "name": "revert", "nodeType": "YulIdentifier", "src": "13369:6:20" }, "nodeType": "YulFunctionCall", "src": "13369:12:20" }, "nodeType": "YulExpressionStatement", "src": "13369:12:20" } ] }, "condition": { "arguments": [ { "arguments": [ { "name": "value", "nodeType": "YulIdentifier", "src": "13335:5:20" }, { "arguments": [ { "name": "value", "nodeType": "YulIdentifier", "src": "13358:5:20" } ], "functionName": { "name": "cleanup_t_uint8", "nodeType": "YulIdentifier", "src": "13342:15:20" }, "nodeType": "YulFunctionCall", "src": "13342:22:20" } ], "functionName": { "name": "eq", "nodeType": "YulIdentifier", "src": "13332:2:20" }, "nodeType": "YulFunctionCall", "src": "13332:33:20" } ], "functionName": { "name": "iszero", "nodeType": "YulIdentifier", "src": "13325:6:20" }, "nodeType": "YulFunctionCall", "src": "13325:41:20" }, "nodeType": "YulIf", "src": "13322:2:20" } ] }, "name": "validator_revert_t_uint8", "nodeType": "YulFunctionDefinition", "parameters": [ { "name": "value", "nodeType": "YulTypedName", "src": "13305:5:20", "type": "" } ], "src": "13271:118:20" } ] }, "contents": "{\n\n function abi_decode_available_length_t_string_memory_ptr_fromMemory(src, length, end) -> array {\n array := allocateMemory(array_allocation_size_t_string_memory_ptr(length))\n mstore(array, length)\n let dst := add(array, 0x20)\n if gt(add(src, length), end) { revert(0, 0) }\n copy_memory_to_memory(src, dst, length)\n }\n\n function abi_decode_t_address(offset, end) -> value {\n value := calldataload(offset)\n validator_revert_t_address(value)\n }\n\n // string\n function abi_decode_t_string_memory_ptr_fromMemory(offset, end) -> array {\n if iszero(slt(add(offset, 0x1f), end)) { revert(0, 0) }\n let length := mload(offset)\n array := abi_decode_available_length_t_string_memory_ptr_fromMemory(add(offset, 0x20), length, end)\n }\n\n function abi_decode_t_uint256(offset, end) -> value {\n value := calldataload(offset)\n validator_revert_t_uint256(value)\n }\n\n function abi_decode_t_uint256_fromMemory(offset, end) -> value {\n value := mload(offset)\n validator_revert_t_uint256(value)\n }\n\n function abi_decode_t_uint8_fromMemory(offset, end) -> value {\n value := mload(offset)\n validator_revert_t_uint8(value)\n }\n\n function abi_decode_tuple_t_address(headStart, dataEnd) -> value0 {\n if slt(sub(dataEnd, headStart), 32) { revert(0, 0) }\n\n {\n\n let offset := 0\n\n value0 := abi_decode_t_address(add(headStart, offset), dataEnd)\n }\n\n }\n\n function abi_decode_tuple_t_addresst_address(headStart, dataEnd) -> value0, value1 {\n if slt(sub(dataEnd, headStart), 64) { revert(0, 0) }\n\n {\n\n let offset := 0\n\n value0 := abi_decode_t_address(add(headStart, offset), dataEnd)\n }\n\n {\n\n let offset := 32\n\n value1 := abi_decode_t_address(add(headStart, offset), dataEnd)\n }\n\n }\n\n function abi_decode_tuple_t_addresst_addresst_uint256(headStart, dataEnd) -> value0, value1, value2 {\n if slt(sub(dataEnd, headStart), 96) { revert(0, 0) }\n\n {\n\n let offset := 0\n\n value0 := abi_decode_t_address(add(headStart, offset), dataEnd)\n }\n\n {\n\n let offset := 32\n\n value1 := abi_decode_t_address(add(headStart, offset), dataEnd)\n }\n\n {\n\n let offset := 64\n\n value2 := abi_decode_t_uint256(add(headStart, offset), dataEnd)\n }\n\n }\n\n function abi_decode_tuple_t_addresst_uint256(headStart, dataEnd) -> value0, value1 {\n if slt(sub(dataEnd, headStart), 64) { revert(0, 0) }\n\n {\n\n let offset := 0\n\n value0 := abi_decode_t_address(add(headStart, offset), dataEnd)\n }\n\n {\n\n let offset := 32\n\n value1 := abi_decode_t_uint256(add(headStart, offset), dataEnd)\n }\n\n }\n\n function abi_decode_tuple_t_string_memory_ptr_fromMemory(headStart, dataEnd) -> value0 {\n if slt(sub(dataEnd, headStart), 32) { revert(0, 0) }\n\n {\n\n let offset := mload(add(headStart, 0))\n if gt(offset, 0xffffffffffffffff) { revert(0, 0) }\n\n value0 := abi_decode_t_string_memory_ptr_fromMemory(add(headStart, offset), dataEnd)\n }\n\n }\n\n function abi_decode_tuple_t_uint256_fromMemory(headStart, dataEnd) -> value0 {\n if slt(sub(dataEnd, headStart), 32) { revert(0, 0) }\n\n {\n\n let offset := 0\n\n value0 := abi_decode_t_uint256_fromMemory(add(headStart, offset), dataEnd)\n }\n\n }\n\n function abi_decode_tuple_t_uint8_fromMemory(headStart, dataEnd) -> value0 {\n if slt(sub(dataEnd, headStart), 32) { revert(0, 0) }\n\n {\n\n let offset := 0\n\n value0 := abi_decode_t_uint8_fromMemory(add(headStart, offset), dataEnd)\n }\n\n }\n\n function abi_encode_t_address_to_t_address_fromStack(value, pos) {\n mstore(pos, cleanup_t_address(value))\n }\n\n function abi_encode_t_bool_to_t_bool_fromStack(value, pos) {\n mstore(pos, cleanup_t_bool(value))\n }\n\n function abi_encode_t_bytes_memory_ptr_to_t_bytes_memory_ptr_nonPadded_inplace_fromStack(value, pos) -> end {\n let length := array_length_t_bytes_memory_ptr(value)\n pos := array_storeLengthForEncoding_t_bytes_memory_ptr_nonPadded_inplace_fromStack(pos, length)\n copy_memory_to_memory(add(value, 0x20), pos, length)\n end := add(pos, length)\n }\n\n function abi_encode_t_string_memory_ptr_to_t_string_memory_ptr_fromStack(value, pos) -> end {\n let length := array_length_t_string_memory_ptr(value)\n pos := array_storeLengthForEncoding_t_string_memory_ptr_fromStack(pos, length)\n copy_memory_to_memory(add(value, 0x20), pos, length)\n end := add(pos, round_up_to_mul_of_32(length))\n }\n\n function abi_encode_t_stringliteral_0557e210f7a69a685100a7e4e3d0a7024c546085cee28910fd17d0b081d9516f_to_t_string_memory_ptr_fromStack(pos) -> end {\n pos := array_storeLengthForEncoding_t_string_memory_ptr_fromStack(pos, 35)\n\n mstore(add(pos, 0), \"ERC20: transfer to the zero addr\")\n\n mstore(add(pos, 32), \"ess\")\n\n end := add(pos, 64)\n }\n\n function abi_encode_t_stringliteral_24883cc5fe64ace9d0df1893501ecb93c77180f0ff69cca79affb3c316dc8029_to_t_string_memory_ptr_fromStack(pos) -> end {\n pos := array_storeLengthForEncoding_t_string_memory_ptr_fromStack(pos, 34)\n\n mstore(add(pos, 0), \"ERC20: approve to the zero addre\")\n\n mstore(add(pos, 32), \"ss\")\n\n end := add(pos, 64)\n }\n\n function abi_encode_t_stringliteral_baecc556b46f4ed0f2b4cb599d60785ac8563dd2dc0a5bf12edea1c39e5e1fea_to_t_string_memory_ptr_fromStack(pos) -> end {\n pos := array_storeLengthForEncoding_t_string_memory_ptr_fromStack(pos, 37)\n\n mstore(add(pos, 0), \"ERC20: transfer from the zero ad\")\n\n mstore(add(pos, 32), \"dress\")\n\n end := add(pos, 64)\n }\n\n function abi_encode_t_stringliteral_c953f4879035ed60e766b34720f656aab5c697b141d924c283124ecedb91c208_to_t_string_memory_ptr_fromStack(pos) -> end {\n pos := array_storeLengthForEncoding_t_string_memory_ptr_fromStack(pos, 36)\n\n mstore(add(pos, 0), \"ERC20: approve from the zero add\")\n\n mstore(add(pos, 32), \"ress\")\n\n end := add(pos, 64)\n }\n\n function abi_encode_t_uint256_to_t_uint256_fromStack(value, pos) {\n mstore(pos, cleanup_t_uint256(value))\n }\n\n function abi_encode_t_uint8_to_t_uint8_fromStack(value, pos) {\n mstore(pos, cleanup_t_uint8(value))\n }\n\n function abi_encode_tuple_packed_t_bytes_memory_ptr__to_t_bytes_memory_ptr__nonPadded_inplace_fromStack_reversed(pos , value0) -> end {\n\n pos := abi_encode_t_bytes_memory_ptr_to_t_bytes_memory_ptr_nonPadded_inplace_fromStack(value0, pos)\n\n end := pos\n }\n\n function abi_encode_tuple_t_address__to_t_address__fromStack_reversed(headStart , value0) -> tail {\n tail := add(headStart, 32)\n\n abi_encode_t_address_to_t_address_fromStack(value0, add(headStart, 0))\n\n }\n\n function abi_encode_tuple_t_address_t_address_t_uint256__to_t_address_t_address_t_uint256__fromStack_reversed(headStart , value2, value1, value0) -> tail {\n tail := add(headStart, 96)\n\n abi_encode_t_address_to_t_address_fromStack(value0, add(headStart, 0))\n\n abi_encode_t_address_to_t_address_fromStack(value1, add(headStart, 32))\n\n abi_encode_t_uint256_to_t_uint256_fromStack(value2, add(headStart, 64))\n\n }\n\n function abi_encode_tuple_t_bool__to_t_bool__fromStack_reversed(headStart , value0) -> tail {\n tail := add(headStart, 32)\n\n abi_encode_t_bool_to_t_bool_fromStack(value0, add(headStart, 0))\n\n }\n\n function abi_encode_tuple_t_string_memory_ptr__to_t_string_memory_ptr__fromStack_reversed(headStart , value0) -> tail {\n tail := add(headStart, 32)\n\n mstore(add(headStart, 0), sub(tail, headStart))\n tail := abi_encode_t_string_memory_ptr_to_t_string_memory_ptr_fromStack(value0, tail)\n\n }\n\n function abi_encode_tuple_t_stringliteral_0557e210f7a69a685100a7e4e3d0a7024c546085cee28910fd17d0b081d9516f__to_t_string_memory_ptr__fromStack_reversed(headStart ) -> tail {\n tail := add(headStart, 32)\n\n mstore(add(headStart, 0), sub(tail, headStart))\n tail := abi_encode_t_stringliteral_0557e210f7a69a685100a7e4e3d0a7024c546085cee28910fd17d0b081d9516f_to_t_string_memory_ptr_fromStack( tail)\n\n }\n\n function abi_encode_tuple_t_stringliteral_24883cc5fe64ace9d0df1893501ecb93c77180f0ff69cca79affb3c316dc8029__to_t_string_memory_ptr__fromStack_reversed(headStart ) -> tail {\n tail := add(headStart, 32)\n\n mstore(add(headStart, 0), sub(tail, headStart))\n tail := abi_encode_t_stringliteral_24883cc5fe64ace9d0df1893501ecb93c77180f0ff69cca79affb3c316dc8029_to_t_string_memory_ptr_fromStack( tail)\n\n }\n\n function abi_encode_tuple_t_stringliteral_baecc556b46f4ed0f2b4cb599d60785ac8563dd2dc0a5bf12edea1c39e5e1fea__to_t_string_memory_ptr__fromStack_reversed(headStart ) -> tail {\n tail := add(headStart, 32)\n\n mstore(add(headStart, 0), sub(tail, headStart))\n tail := abi_encode_t_stringliteral_baecc556b46f4ed0f2b4cb599d60785ac8563dd2dc0a5bf12edea1c39e5e1fea_to_t_string_memory_ptr_fromStack( tail)\n\n }\n\n function abi_encode_tuple_t_stringliteral_c953f4879035ed60e766b34720f656aab5c697b141d924c283124ecedb91c208__to_t_string_memory_ptr__fromStack_reversed(headStart ) -> tail {\n tail := add(headStart, 32)\n\n mstore(add(headStart, 0), sub(tail, headStart))\n tail := abi_encode_t_stringliteral_c953f4879035ed60e766b34720f656aab5c697b141d924c283124ecedb91c208_to_t_string_memory_ptr_fromStack( tail)\n\n }\n\n function abi_encode_tuple_t_uint256__to_t_uint256__fromStack_reversed(headStart , value0) -> tail {\n tail := add(headStart, 32)\n\n abi_encode_t_uint256_to_t_uint256_fromStack(value0, add(headStart, 0))\n\n }\n\n function abi_encode_tuple_t_uint8__to_t_uint8__fromStack_reversed(headStart , value0) -> tail {\n tail := add(headStart, 32)\n\n abi_encode_t_uint8_to_t_uint8_fromStack(value0, add(headStart, 0))\n\n }\n\n function allocateMemory(size) -> memPtr {\n memPtr := mload(64)\n let newFreePtr := add(memPtr, size)\n // protect against overflow\n if or(gt(newFreePtr, 0xffffffffffffffff), lt(newFreePtr, memPtr)) { panic_error_0x41() }\n mstore(64, newFreePtr)\n }\n\n function array_allocation_size_t_string_memory_ptr(length) -> size {\n // Make sure we can allocate memory without overflow\n if gt(length, 0xffffffffffffffff) { panic_error_0x41() }\n\n // round up\n size := and(add(length, 0x1f), not(0x1f))\n\n // add length slot\n size := add(size, 0x20)\n\n }\n\n function array_length_t_bytes_memory_ptr(value) -> length {\n\n length := mload(value)\n\n }\n\n function array_length_t_string_memory_ptr(value) -> length {\n\n length := mload(value)\n\n }\n\n function array_storeLengthForEncoding_t_bytes_memory_ptr_nonPadded_inplace_fromStack(pos, length) -> updated_pos {\n updated_pos := pos\n }\n\n function array_storeLengthForEncoding_t_string_memory_ptr_fromStack(pos, length) -> updated_pos {\n mstore(pos, length)\n updated_pos := add(pos, 0x20)\n }\n\n function checked_add_t_uint256(x, y) -> sum {\n x := cleanup_t_uint256(x)\n y := cleanup_t_uint256(y)\n\n // overflow, if x > (maxValue - y)\n if gt(x, sub(0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff, y)) { panic_error_0x11() }\n\n sum := add(x, y)\n }\n\n function cleanup_t_address(value) -> cleaned {\n cleaned := cleanup_t_uint160(value)\n }\n\n function cleanup_t_bool(value) -> cleaned {\n cleaned := iszero(iszero(value))\n }\n\n function cleanup_t_uint160(value) -> cleaned {\n cleaned := and(value, 0xffffffffffffffffffffffffffffffffffffffff)\n }\n\n function cleanup_t_uint256(value) -> cleaned {\n cleaned := value\n }\n\n function cleanup_t_uint8(value) -> cleaned {\n cleaned := and(value, 0xff)\n }\n\n function copy_memory_to_memory(src, dst, length) {\n let i := 0\n for { } lt(i, length) { i := add(i, 32) }\n {\n mstore(add(dst, i), mload(add(src, i)))\n }\n if gt(i, length)\n {\n // clear end\n mstore(add(dst, length), 0)\n }\n }\n\n function panic_error_0x11() {\n mstore(0, 35408467139433450592217433187231851964531694900788300625387963629091585785856)\n mstore(4, 0x11)\n revert(0, 0x24)\n }\n\n function panic_error_0x41() {\n mstore(0, 35408467139433450592217433187231851964531694900788300625387963629091585785856)\n mstore(4, 0x41)\n revert(0, 0x24)\n }\n\n function round_up_to_mul_of_32(value) -> result {\n result := and(add(value, 31), not(31))\n }\n\n function validator_revert_t_address(value) {\n if iszero(eq(value, cleanup_t_address(value))) { revert(0, 0) }\n }\n\n function validator_revert_t_uint256(value) {\n if iszero(eq(value, cleanup_t_uint256(value))) { revert(0, 0) }\n }\n\n function validator_revert_t_uint8(value) {\n if iszero(eq(value, cleanup_t_uint8(value))) { revert(0, 0) }\n }\n\n}\n", "id": 20, "language": "Yul", "name": "#utility.yul" } ], "sourceMap": "391:5619:11:-:0;;;;;;;;;;;;;;;;;;;", "deployedSourceMap": 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"source": "// SPDX-License-Identifier: GPL-3.0-or-later\n\n// Based on ERC20 implementation of @openzeppelin/contracts (v4.3.1):\n// https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v4.3.1/contracts/token/ERC20/ERC20.sol\n\npragma solidity ^0.8.0;\n\nimport \"@openzeppelin/contracts/utils/math/SafeMath.sol\";\nimport \"@openzeppelin/contracts/token/ERC20/IERC20.sol\";\n\nimport \"./MultiCurrency.sol\";\n\ncontract Token is IERC20 {\n using SafeMath for uint256;\n\n mapping (address => mapping (address => uint256)) private _allowances;\n\n /**\n * @dev Returns the name of the token.\n */\n function name() public view returns (string memory) {\n return MultiCurrency.name();\n }\n\n /**\n * @dev Returns the symbol of the token, usually a shorter version of the\n * name.\n */\n function symbol() public view returns (string memory) {\n return MultiCurrency.symbol();\n }\n\n /**\n * @dev Returns the number of decimals used to get its user representation.\n */\n function decimals() public view returns (uint8) {\n return MultiCurrency.decimals();\n }\n\n /**\n * @dev See {IERC20-totalSupply}.\n */\n function totalSupply() public view override returns (uint256) {\n return MultiCurrency.totalSupply();\n }\n\n /**\n * @dev See {IERC20-balanceOf}.\n */\n function balanceOf(address account) public view override returns (uint256) {\n return MultiCurrency.balanceOf(account);\n }\n\n /**\n * @dev See {IERC20-transfer}.\n *\n * Requirements:\n *\n * - `recipient` cannot be the zero address.\n * - the caller must have a balance of at least `amount`.\n */\n function transfer(address recipient, uint256 amount) public override returns (bool) {\n _transfer(msg.sender, recipient, amount);\n return true;\n }\n\n /**\n * @dev See {IERC20-allowance}.\n */\n function allowance(address owner, address spender) public view override returns (uint256) {\n return _allowances[owner][spender];\n }\n\n /**\n * @dev See {IERC20-approve}.\n *\n * Requirements:\n *\n * - `spender` cannot be the zero address.\n */\n function approve(address spender, uint256 amount) public override returns (bool) {\n _approve(msg.sender, spender, amount);\n return true;\n }\n\n /**\n * @dev See {IERC20-transferFrom}.\n *\n * Emits an {Approval} event indicating the updated allowance. This is not\n * required by the EIP. See the note at the beginning of {ERC20};\n *\n * Requirements:\n * - `sender` and `recipient` cannot be the zero address.\n * - `sender` must have a balance of at least `amount`.\n * - the caller must have allowance for `sender`'s tokens of at least\n * `amount`.\n */\n function transferFrom(address sender, address recipient, uint256 amount) public override returns (bool) {\n _transfer(sender, recipient, amount);\n _approve(sender, msg.sender, _allowances[sender][msg.sender].sub(amount, \"ERC20: transfer amount exceeds allowance\"));\n return true;\n }\n\n /**\n * @dev Atomically increases the allowance granted to `spender` by the caller.\n *\n * This is an alternative to {approve} that can be used as a mitigation for\n * problems described in {IERC20-approve}.\n *\n * Emits an {Approval} event indicating the updated allowance.\n *\n * Requirements:\n *\n * - `spender` cannot be the zero address.\n */\n function increaseAllowance(address spender, uint256 addedValue) public returns (bool) {\n _approve(msg.sender, spender, _allowances[msg.sender][spender].add(addedValue));\n return true;\n }\n\n /**\n * @dev Atomically decreases the allowance granted to `spender` by the caller.\n *\n * This is an alternative to {approve} that can be used as a mitigation for\n * problems described in {IERC20-approve}.\n *\n * Emits an {Approval} event indicating the updated allowance.\n *\n * Requirements:\n *\n * - `spender` cannot be the zero address.\n * - `spender` must have allowance for the caller of at least\n * `subtractedValue`.\n */\n function decreaseAllowance(address spender, uint256 subtractedValue) public returns (bool) {\n _approve(msg.sender, spender, _allowances[msg.sender][spender].sub(subtractedValue, \"ERC20: decreased allowance below zero\"));\n return true;\n }\n\n /**\n * @dev Moves tokens `amount` from `sender` to `recipient`.\n *\n * This is internal function is equivalent to {transfer}, and can be used to\n * e.g. implement automatic token fees, slashing mechanisms, etc.\n *\n * Emits a {Transfer} event.\n *\n * Requirements:\n *\n * - `sender` cannot be the zero address.\n * - `recipient` cannot be the zero address.\n * - `sender` must have a balance of at least `amount`.\n */\n function _transfer(address sender, address recipient, uint256 amount) internal {\n require(sender != address(0), \"ERC20: transfer from the zero address\");\n require(recipient != address(0), \"ERC20: transfer to the zero address\");\n\n MultiCurrency.transfer(sender, recipient, amount);\n\n emit Transfer(sender, recipient, amount);\n }\n\n /**\n * @dev Sets `amount` as the allowance of `spender` over the `owner`s tokens.\n *\n * This is internal function is equivalent to `approve`, and can be used to\n * e.g. set automatic allowances for certain subsystems, etc.\n *\n * Emits an {Approval} event.\n *\n * Requirements:\n *\n * - `owner` cannot be the zero address.\n * - `spender` cannot be the zero address.\n */\n function _approve(address owner, address spender, uint256 amount) internal {\n require(owner != address(0), \"ERC20: approve from the zero address\");\n require(spender != address(0), \"ERC20: approve to the zero address\");\n\n _allowances[owner][spender] = amount;\n emit Approval(owner, spender, amount);\n }\n}\n", "sourcePath": "/home/runner/work/predeploy-contracts/predeploy-contracts/contracts/token/Token.sol", "ast": { "absolutePath": "/home/runner/work/predeploy-contracts/predeploy-contracts/contracts/token/Token.sol", "exportedSymbols": { "IERC20": [ 2698 ], "MultiCurrency": [ 1557 ], "SafeMath": [ 3057 ], "Token": [ 1879 ] }, "id": 1880, "license": "GPL-3.0-or-later", "nodeType": "SourceUnit", "nodes": [ { "id": 1559, "literals": [ "solidity", "^", "0.8", ".0" ], "nodeType": "PragmaDirective", "src": "219:23:11" }, { "absolutePath": "@openzeppelin/contracts/utils/math/SafeMath.sol", "file": "@openzeppelin/contracts/utils/math/SafeMath.sol", "id": 1560, "nodeType": "ImportDirective", "scope": 1880, "sourceUnit": 3058, 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"nodeType": "OverrideSpecifier", "overrides": [], "src": "1376:8:11" }, "parameters": { "id": 1622, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1621, "mutability": "mutable", "name": "account", "nodeType": "VariableDeclaration", "scope": 1633, "src": "1347:15:11", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 1620, "name": "address", "nodeType": "ElementaryTypeName", "src": "1347:7:11", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" } ], "src": "1346:17:11" }, "returnParameters": { "id": 1626, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1625, "mutability": "mutable", "name": "", "nodeType": "VariableDeclaration", "scope": 1633, "src": "1394:7:11", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 1624, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "1394:7:11", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "1393:9:11" }, "scope": 1879, "src": "1328:131:11", "stateMutability": "view", "virtual": false, "visibility": "public" }, { "baseFunctions": [ 2647 ], "body": { "id": 1653, "nodeType": "Block", "src": "1746:78:11", "statements": [ { "expression": { "arguments": [ { "expression": { "id": 1645, "name": "msg", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4294967281, "src": "1766:3:11", "typeDescriptions": { "typeIdentifier": "t_magic_message", "typeString": "msg" } }, "id": 1646, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "sender", "nodeType": "MemberAccess", "src": "1766:10:11", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 1647, "name": "recipient", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1636, "src": "1778:9:11", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 1648, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1638, "src": "1789:6:11", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 1644, "name": "_transfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1833, "src": "1756:9:11", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 1649, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "1756:40:11", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1650, "nodeType": "ExpressionStatement", "src": "1756:40:11" }, { "expression": { "hexValue": "74727565", "id": 1651, "isConstant": false, "isLValue": false, "isPure": true, "kind": "bool", "lValueRequested": false, "nodeType": "Literal", "src": "1813:4:11", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "value": "true" }, "functionReturnParameters": 1643, "id": 1652, "nodeType": "Return", "src": "1806:11:11" } ] }, "documentation": { "id": 1634, "nodeType": "StructuredDocumentation", "src": "1465:192:11", "text": " @dev See {IERC20-transfer}.\n Requirements:\n - `recipient` cannot be the zero address.\n - the caller must have a balance of at least `amount`." }, "functionSelector": "a9059cbb", "id": 1654, "implemented": true, "kind": "function", "modifiers": [], "name": "transfer", "nodeType": "FunctionDefinition", "overrides": { "id": 1640, "nodeType": "OverrideSpecifier", "overrides": [], "src": "1722:8:11" }, "parameters": { "id": 1639, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1636, "mutability": "mutable", "name": "recipient", "nodeType": "VariableDeclaration", "scope": 1654, "src": "1680:17:11", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 1635, "name": "address", "nodeType": "ElementaryTypeName", "src": "1680:7:11", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 1638, "mutability": "mutable", "name": "amount", "nodeType": "VariableDeclaration", "scope": 1654, "src": "1699:14:11", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 1637, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "1699:7:11", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "1679:35:11" }, "returnParameters": { "id": 1643, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1642, "mutability": "mutable", "name": "", "nodeType": "VariableDeclaration", "scope": 1654, "src": "1740:4:11", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "typeName": { "id": 1641, "name": "bool", "nodeType": "ElementaryTypeName", "src": "1740:4:11", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "visibility": "internal" } ], "src": "1739:6:11" }, "scope": 1879, "src": "1662:162:11", "stateMutability": "nonpayable", "virtual": false, "visibility": "public" }, { "baseFunctions": [ 2657 ], "body": { "id": 1671, "nodeType": "Block", "src": "1972:51:11", "statements": [ { "expression": { "baseExpression": { "baseExpression": { "id": 1665, "name": "_allowances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1573, "src": "1989:11:11", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_mapping$_t_address_$_t_uint256_$_$", "typeString": "mapping(address => mapping(address => uint256))" } }, "id": 1667, "indexExpression": { "id": 1666, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1657, "src": "2001:5:11", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "1989:18:11", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 1669, "indexExpression": { "id": 1668, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1659, "src": "2008:7:11", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "1989:27:11", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "functionReturnParameters": 1664, "id": 1670, "nodeType": "Return", "src": "1982:34:11" } ] }, "documentation": { "id": 1655, "nodeType": "StructuredDocumentation", "src": "1830:47:11", "text": " @dev See {IERC20-allowance}." }, "functionSelector": "dd62ed3e", "id": 1672, "implemented": true, "kind": "function", "modifiers": [], "name": "allowance", "nodeType": "FunctionDefinition", "overrides": { "id": 1661, "nodeType": "OverrideSpecifier", "overrides": [], "src": "1945:8:11" }, "parameters": { "id": 1660, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1657, "mutability": "mutable", "name": "owner", "nodeType": "VariableDeclaration", "scope": 1672, "src": "1901:13:11", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 1656, "name": "address", "nodeType": "ElementaryTypeName", "src": "1901:7:11", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 1659, "mutability": "mutable", "name": "spender", "nodeType": "VariableDeclaration", "scope": 1672, "src": "1916:15:11", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 1658, "name": "address", "nodeType": "ElementaryTypeName", "src": "1916:7:11", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" } ], "src": "1900:32:11" }, "returnParameters": { "id": 1664, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1663, "mutability": "mutable", "name": "", "nodeType": "VariableDeclaration", "scope": 1672, "src": "1963:7:11", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 1662, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "1963:7:11", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "1962:9:11" }, "scope": 1879, "src": "1882:141:11", "stateMutability": "view", "virtual": false, "visibility": "public" }, { "baseFunctions": [ 2667 ], "body": { "id": 1692, "nodeType": "Block", "src": "2242:75:11", "statements": [ { "expression": { "arguments": [ { "expression": { "id": 1684, "name": "msg", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4294967281, "src": "2261:3:11", "typeDescriptions": { "typeIdentifier": "t_magic_message", "typeString": "msg" } }, "id": 1685, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "sender", "nodeType": "MemberAccess", "src": "2261:10:11", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 1686, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1675, "src": "2273:7:11", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 1687, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1677, "src": "2282:6:11", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 1683, "name": "_approve", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1878, "src": "2252:8:11", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 1688, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "2252:37:11", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1689, "nodeType": "ExpressionStatement", "src": "2252:37:11" }, { "expression": { "hexValue": "74727565", "id": 1690, "isConstant": false, "isLValue": false, "isPure": true, "kind": "bool", "lValueRequested": false, "nodeType": "Literal", "src": "2306:4:11", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "value": "true" }, "functionReturnParameters": 1682, "id": 1691, "nodeType": "Return", "src": "2299:11:11" } ] }, "documentation": { "id": 1673, "nodeType": "StructuredDocumentation", "src": "2029:127:11", "text": " @dev See {IERC20-approve}.\n Requirements:\n - `spender` cannot be the zero address." }, "functionSelector": "095ea7b3", "id": 1693, "implemented": true, "kind": "function", "modifiers": [], "name": "approve", "nodeType": "FunctionDefinition", "overrides": { "id": 1679, "nodeType": "OverrideSpecifier", "overrides": [], "src": "2218:8:11" }, "parameters": { "id": 1678, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1675, "mutability": "mutable", "name": "spender", "nodeType": "VariableDeclaration", "scope": 1693, "src": "2178:15:11", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 1674, "name": "address", "nodeType": "ElementaryTypeName", "src": "2178:7:11", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 1677, "mutability": "mutable", "name": "amount", "nodeType": "VariableDeclaration", "scope": 1693, "src": "2195:14:11", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 1676, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "2195:7:11", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "2177:33:11" }, "returnParameters": { "id": 1682, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1681, "mutability": "mutable", "name": "", "nodeType": "VariableDeclaration", "scope": 1693, "src": "2236:4:11", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "typeName": { "id": 1680, "name": "bool", "nodeType": "ElementaryTypeName", "src": "2236:4:11", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "visibility": "internal" } ], "src": "2235:6:11" }, "scope": 1879, "src": "2161:156:11", "stateMutability": "nonpayable", "virtual": false, "visibility": "public" }, { "baseFunctions": [ 2679 ], "body": { "id": 1730, "nodeType": "Block", "src": "2879:201:11", "statements": [ { "expression": { "arguments": [ { "id": 1707, "name": "sender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1696, "src": "2899:6:11", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 1708, "name": "recipient", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1698, "src": "2907:9:11", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 1709, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1700, "src": "2918:6:11", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 1706, "name": "_transfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1833, "src": "2889:9:11", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 1710, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "2889:36:11", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1711, "nodeType": "ExpressionStatement", "src": "2889:36:11" }, { "expression": { "arguments": [ { "id": 1713, "name": "sender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1696, "src": "2944:6:11", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "expression": { "id": 1714, "name": "msg", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4294967281, "src": "2952:3:11", "typeDescriptions": { "typeIdentifier": "t_magic_message", "typeString": "msg" } }, "id": 1715, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "sender", "nodeType": "MemberAccess", "src": "2952:10:11", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "arguments": [ { "id": 1723, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1700, "src": "3000:6:11", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, { "hexValue": "45524332303a207472616e7366657220616d6f756e74206578636565647320616c6c6f77616e6365", "id": 1724, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "3008:42:11", "typeDescriptions": { "typeIdentifier": "t_stringliteral_974d1b4421da69cc60b481194f0dad36a5bb4e23da810da7a7fb30cdba178330", "typeString": "literal_string \"ERC20: transfer amount exceeds allowance\"" }, "value": "ERC20: transfer amount exceeds allowance" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" }, { "typeIdentifier": "t_stringliteral_974d1b4421da69cc60b481194f0dad36a5bb4e23da810da7a7fb30cdba178330", "typeString": "literal_string \"ERC20: transfer amount exceeds allowance\"" } ], "expression": { "baseExpression": { "baseExpression": { "id": 1716, "name": "_allowances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1573, "src": "2964:11:11", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_mapping$_t_address_$_t_uint256_$_$", "typeString": "mapping(address => mapping(address => uint256))" } }, "id": 1718, "indexExpression": { "id": 1717, "name": "sender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1696, "src": "2976:6:11", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "2964:19:11", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 1721, "indexExpression": { "expression": { "id": 1719, "name": "msg", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4294967281, "src": "2984:3:11", "typeDescriptions": { "typeIdentifier": "t_magic_message", "typeString": "msg" } }, "id": 1720, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "sender", "nodeType": "MemberAccess", "src": "2984:10:11", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "2964:31:11", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 1722, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "sub", "nodeType": "MemberAccess", "referencedDeclaration": 3006, "src": "2964:35:11", "typeDescriptions": { "typeIdentifier": "t_function_internal_pure$_t_uint256_$_t_uint256_$_t_string_memory_ptr_$returns$_t_uint256_$bound_to$_t_uint256_$", "typeString": "function (uint256,uint256,string memory) pure returns (uint256)" } }, "id": 1725, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "2964:87:11", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 1712, "name": "_approve", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1878, "src": "2935:8:11", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 1726, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "2935:117:11", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1727, "nodeType": "ExpressionStatement", "src": "2935:117:11" }, { "expression": { "hexValue": "74727565", "id": 1728, "isConstant": false, "isLValue": false, "isPure": true, "kind": "bool", "lValueRequested": false, "nodeType": "Literal", "src": "3069:4:11", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "value": "true" }, "functionReturnParameters": 1705, "id": 1729, "nodeType": "Return", "src": "3062:11:11" } ] }, "documentation": { "id": 1694, "nodeType": "StructuredDocumentation", "src": "2323:447:11", "text": " @dev See {IERC20-transferFrom}.\n Emits an {Approval} event indicating the updated allowance. This is not\n required by the EIP. See the note at the beginning of {ERC20};\n Requirements:\n - `sender` and `recipient` cannot be the zero address.\n - `sender` must have a balance of at least `amount`.\n - the caller must have allowance for `sender`'s tokens of at least\n `amount`." }, "functionSelector": "23b872dd", "id": 1731, "implemented": true, "kind": "function", "modifiers": [], "name": "transferFrom", "nodeType": "FunctionDefinition", "overrides": { "id": 1702, "nodeType": "OverrideSpecifier", "overrides": [], "src": "2855:8:11" }, "parameters": { "id": 1701, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1696, "mutability": "mutable", "name": "sender", "nodeType": "VariableDeclaration", "scope": 1731, "src": "2797:14:11", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 1695, "name": "address", "nodeType": "ElementaryTypeName", "src": "2797:7:11", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 1698, "mutability": "mutable", "name": "recipient", "nodeType": "VariableDeclaration", "scope": 1731, "src": "2813:17:11", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 1697, "name": "address", "nodeType": "ElementaryTypeName", "src": "2813:7:11", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 1700, "mutability": "mutable", "name": "amount", "nodeType": "VariableDeclaration", "scope": 1731, "src": "2832:14:11", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 1699, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "2832:7:11", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "2796:51:11" }, "returnParameters": { "id": 1705, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1704, "mutability": "mutable", "name": "", "nodeType": "VariableDeclaration", "scope": 1731, "src": "2873:4:11", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "typeName": { "id": 1703, "name": "bool", "nodeType": "ElementaryTypeName", "src": "2873:4:11", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "visibility": "internal" } ], "src": "2872:6:11" }, "scope": 1879, "src": "2775:305:11", "stateMutability": "nonpayable", "virtual": false, "visibility": "public" }, { "body": { "id": 1758, "nodeType": "Block", "src": "3561:117:11", "statements": [ { "expression": { "arguments": [ { "expression": { "id": 1742, "name": "msg", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4294967281, "src": "3580:3:11", "typeDescriptions": { "typeIdentifier": "t_magic_message", "typeString": "msg" } }, "id": 1743, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "sender", "nodeType": "MemberAccess", "src": "3580:10:11", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 1744, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1734, "src": "3592:7:11", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "arguments": [ { "id": 1752, "name": "addedValue", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1736, "src": "3638:10:11", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "expression": { "baseExpression": { "baseExpression": { "id": 1745, "name": "_allowances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1573, "src": "3601:11:11", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_mapping$_t_address_$_t_uint256_$_$", "typeString": "mapping(address => mapping(address => uint256))" } }, "id": 1748, "indexExpression": { "expression": { "id": 1746, "name": "msg", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4294967281, "src": "3613:3:11", "typeDescriptions": { "typeIdentifier": "t_magic_message", "typeString": "msg" } }, "id": 1747, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "sender", "nodeType": "MemberAccess", "src": "3613:10:11", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "3601:23:11", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 1750, "indexExpression": { "id": 1749, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1734, "src": "3625:7:11", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "3601:32:11", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 1751, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "add", "nodeType": "MemberAccess", "referencedDeclaration": 2921, "src": "3601:36:11", "typeDescriptions": { "typeIdentifier": "t_function_internal_pure$_t_uint256_$_t_uint256_$returns$_t_uint256_$bound_to$_t_uint256_$", "typeString": "function (uint256,uint256) pure returns (uint256)" } }, "id": 1753, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "3601:48:11", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 1741, "name": "_approve", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1878, "src": "3571:8:11", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 1754, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "3571:79:11", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1755, "nodeType": "ExpressionStatement", "src": "3571:79:11" }, { "expression": { "hexValue": "74727565", "id": 1756, "isConstant": false, "isLValue": false, "isPure": true, "kind": "bool", "lValueRequested": false, "nodeType": "Literal", "src": "3667:4:11", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "value": "true" }, "functionReturnParameters": 1740, "id": 1757, "nodeType": "Return", "src": "3660:11:11" } ] }, "documentation": { "id": 1732, "nodeType": "StructuredDocumentation", "src": "3086:384:11", "text": " @dev Atomically increases the allowance granted to `spender` by the caller.\n This is an alternative to {approve} that can be used as a mitigation for\n problems described in {IERC20-approve}.\n Emits an {Approval} event indicating the updated allowance.\n Requirements:\n - `spender` cannot be the zero address." }, "functionSelector": "39509351", "id": 1759, "implemented": true, "kind": "function", "modifiers": [], "name": "increaseAllowance", "nodeType": "FunctionDefinition", "parameters": { "id": 1737, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1734, "mutability": "mutable", "name": "spender", "nodeType": "VariableDeclaration", "scope": 1759, "src": "3502:15:11", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 1733, "name": "address", "nodeType": "ElementaryTypeName", "src": "3502:7:11", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 1736, "mutability": "mutable", "name": "addedValue", "nodeType": "VariableDeclaration", "scope": 1759, "src": "3519:18:11", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 1735, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "3519:7:11", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "3501:37:11" }, "returnParameters": { "id": 1740, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1739, "mutability": "mutable", "name": "", "nodeType": "VariableDeclaration", "scope": 1759, "src": "3555:4:11", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "typeName": { "id": 1738, "name": "bool", "nodeType": "ElementaryTypeName", "src": "3555:4:11", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "visibility": "internal" } ], "src": "3554:6:11" }, "scope": 1879, "src": "3475:203:11", "stateMutability": "nonpayable", "virtual": false, "visibility": "public" }, { "body": { "id": 1787, "nodeType": "Block", "src": "4256:163:11", "statements": [ { "expression": { "arguments": [ { "expression": { "id": 1770, "name": "msg", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4294967281, "src": "4275:3:11", "typeDescriptions": { "typeIdentifier": "t_magic_message", "typeString": "msg" } }, "id": 1771, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "sender", "nodeType": "MemberAccess", "src": "4275:10:11", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 1772, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1762, "src": "4287:7:11", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "arguments": [ { "id": 1780, "name": "subtractedValue", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1764, "src": "4333:15:11", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, { "hexValue": "45524332303a2064656372656173656420616c6c6f77616e63652062656c6f77207a65726f", "id": 1781, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "4350:39:11", "typeDescriptions": { "typeIdentifier": "t_stringliteral_f8b476f7d28209d77d4a4ac1fe36b9f8259aa1bb6bddfa6e89de7e51615cf8a8", "typeString": "literal_string \"ERC20: decreased allowance below zero\"" }, "value": "ERC20: decreased allowance below zero" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" }, { "typeIdentifier": "t_stringliteral_f8b476f7d28209d77d4a4ac1fe36b9f8259aa1bb6bddfa6e89de7e51615cf8a8", "typeString": "literal_string \"ERC20: decreased allowance below zero\"" } ], "expression": { "baseExpression": { "baseExpression": { "id": 1773, "name": "_allowances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1573, "src": "4296:11:11", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_mapping$_t_address_$_t_uint256_$_$", "typeString": "mapping(address => mapping(address => uint256))" } }, "id": 1776, "indexExpression": { "expression": { "id": 1774, "name": "msg", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4294967281, "src": "4308:3:11", "typeDescriptions": { "typeIdentifier": "t_magic_message", "typeString": "msg" } }, "id": 1775, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "sender", "nodeType": "MemberAccess", "src": "4308:10:11", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "4296:23:11", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 1778, "indexExpression": { "id": 1777, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1762, "src": "4320:7:11", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "4296:32:11", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 1779, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "sub", "nodeType": "MemberAccess", "referencedDeclaration": 3006, "src": "4296:36:11", "typeDescriptions": { "typeIdentifier": "t_function_internal_pure$_t_uint256_$_t_uint256_$_t_string_memory_ptr_$returns$_t_uint256_$bound_to$_t_uint256_$", "typeString": "function (uint256,uint256,string memory) pure returns (uint256)" } }, "id": 1782, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "4296:94:11", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 1769, "name": "_approve", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1878, "src": "4266:8:11", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 1783, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "4266:125:11", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1784, "nodeType": "ExpressionStatement", "src": "4266:125:11" }, { "expression": { "hexValue": "74727565", "id": 1785, "isConstant": false, "isLValue": false, "isPure": true, "kind": "bool", "lValueRequested": false, "nodeType": "Literal", "src": "4408:4:11", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "value": "true" }, "functionReturnParameters": 1768, "id": 1786, "nodeType": "Return", "src": "4401:11:11" } ] }, "documentation": { "id": 1760, "nodeType": "StructuredDocumentation", "src": "3684:476:11", "text": " @dev Atomically decreases the allowance granted to `spender` by the caller.\n This is an alternative to {approve} that can be used as a mitigation for\n problems described in {IERC20-approve}.\n Emits an {Approval} event indicating the updated allowance.\n Requirements:\n - `spender` cannot be the zero address.\n - `spender` must have allowance for the caller of at least\n `subtractedValue`." }, "functionSelector": "a457c2d7", "id": 1788, "implemented": true, "kind": "function", "modifiers": [], "name": "decreaseAllowance", "nodeType": "FunctionDefinition", "parameters": { "id": 1765, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1762, "mutability": "mutable", "name": "spender", "nodeType": "VariableDeclaration", "scope": 1788, "src": "4192:15:11", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 1761, "name": "address", "nodeType": "ElementaryTypeName", "src": "4192:7:11", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 1764, "mutability": "mutable", "name": "subtractedValue", "nodeType": "VariableDeclaration", "scope": 1788, "src": "4209:23:11", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 1763, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "4209:7:11", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "4191:42:11" }, "returnParameters": { "id": 1768, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1767, "mutability": "mutable", "name": "", "nodeType": "VariableDeclaration", "scope": 1788, "src": "4250:4:11", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "typeName": { "id": 1766, "name": "bool", "nodeType": "ElementaryTypeName", "src": "4250:4:11", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "visibility": "internal" } ], "src": "4249:6:11" }, "scope": 1879, "src": "4165:254:11", "stateMutability": "nonpayable", "virtual": false, "visibility": "public" }, { "body": { "id": 1832, "nodeType": "Block", "src": "4972:279:11", "statements": [ { "expression": { "arguments": [ { "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 1804, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 1799, "name": "sender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1791, "src": "4990:6:11", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "arguments": [ { "hexValue": "30", "id": 1802, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "5008:1:11", "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" } ], "id": 1801, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "5000:7:11", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 1800, "name": "address", "nodeType": "ElementaryTypeName", "src": "5000:7:11", "typeDescriptions": {} } }, "id": 1803, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "5000:10:11", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "4990:20:11", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "45524332303a207472616e736665722066726f6d20746865207a65726f2061646472657373", "id": 1805, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "5012:39:11", "typeDescriptions": { "typeIdentifier": "t_stringliteral_baecc556b46f4ed0f2b4cb599d60785ac8563dd2dc0a5bf12edea1c39e5e1fea", "typeString": "literal_string \"ERC20: transfer from the zero address\"" }, "value": "ERC20: transfer from the zero address" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_baecc556b46f4ed0f2b4cb599d60785ac8563dd2dc0a5bf12edea1c39e5e1fea", "typeString": "literal_string \"ERC20: transfer from the zero address\"" } ], "id": 1798, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 4294967278, 4294967278 ], "referencedDeclaration": 4294967278, "src": "4982:7:11", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 1806, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "4982:70:11", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1807, "nodeType": "ExpressionStatement", "src": "4982:70:11" }, { "expression": { "arguments": [ { "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 1814, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 1809, "name": "recipient", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1793, "src": "5070:9:11", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "arguments": [ { "hexValue": "30", "id": 1812, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "5091:1:11", "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" } ], "id": 1811, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "5083:7:11", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 1810, "name": "address", "nodeType": "ElementaryTypeName", "src": "5083:7:11", "typeDescriptions": {} } }, "id": 1813, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "5083:10:11", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "5070:23:11", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "45524332303a207472616e7366657220746f20746865207a65726f2061646472657373", "id": 1815, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "5095:37:11", "typeDescriptions": { "typeIdentifier": "t_stringliteral_0557e210f7a69a685100a7e4e3d0a7024c546085cee28910fd17d0b081d9516f", "typeString": "literal_string \"ERC20: transfer to the zero address\"" }, "value": "ERC20: transfer to the zero address" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_0557e210f7a69a685100a7e4e3d0a7024c546085cee28910fd17d0b081d9516f", "typeString": "literal_string \"ERC20: transfer to the zero address\"" } ], "id": 1808, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 4294967278, 4294967278 ], "referencedDeclaration": 4294967278, "src": "5062:7:11", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 1816, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "5062:71:11", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1817, "nodeType": "ExpressionStatement", "src": "5062:71:11" }, { "expression": { "arguments": [ { "id": 1821, "name": "sender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1791, "src": "5167:6:11", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 1822, "name": "recipient", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1793, "src": "5175:9:11", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 1823, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1795, "src": "5186:6:11", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "expression": { "id": 1818, "name": "MultiCurrency", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1557, "src": "5144:13:11", "typeDescriptions": { "typeIdentifier": "t_type$_t_contract$_MultiCurrency_$1557_$", "typeString": "type(library MultiCurrency)" } }, "id": 1820, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "transfer", "nodeType": "MemberAccess", "referencedDeclaration": 1556, "src": "5144:22:11", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 1824, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "5144:49:11", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1825, "nodeType": "ExpressionStatement", "src": "5144:49:11" }, { "eventCall": { "arguments": [ { "id": 1827, "name": "sender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1791, "src": "5218:6:11", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 1828, "name": "recipient", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1793, "src": "5226:9:11", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 1829, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1795, "src": "5237:6:11", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 1826, "name": "Transfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2688, "src": "5209:8:11", "typeDescriptions": { "typeIdentifier": "t_function_event_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 1830, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "5209:35:11", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1831, "nodeType": "EmitStatement", "src": "5204:40:11" } ] }, "documentation": { "id": 1789, "nodeType": "StructuredDocumentation", "src": "4425:463:11", "text": " @dev Moves tokens `amount` from `sender` to `recipient`.\n This is internal function is equivalent to {transfer}, and can be used to\n e.g. implement automatic token fees, slashing mechanisms, etc.\n Emits a {Transfer} event.\n Requirements:\n - `sender` cannot be the zero address.\n - `recipient` cannot be the zero address.\n - `sender` must have a balance of at least `amount`." }, "id": 1833, "implemented": true, "kind": "function", "modifiers": [], "name": "_transfer", "nodeType": "FunctionDefinition", "parameters": { "id": 1796, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1791, "mutability": "mutable", "name": "sender", "nodeType": "VariableDeclaration", "scope": 1833, "src": "4912:14:11", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 1790, "name": "address", "nodeType": "ElementaryTypeName", "src": "4912:7:11", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 1793, "mutability": "mutable", "name": "recipient", "nodeType": "VariableDeclaration", "scope": 1833, "src": "4928:17:11", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 1792, "name": "address", "nodeType": "ElementaryTypeName", "src": "4928:7:11", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 1795, "mutability": "mutable", "name": "amount", "nodeType": "VariableDeclaration", "scope": 1833, "src": "4947:14:11", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 1794, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "4947:7:11", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "4911:51:11" }, "returnParameters": { "id": 1797, "nodeType": "ParameterList", "parameters": [], "src": "4972:0:11" }, "scope": 1879, "src": "4893:358:11", "stateMutability": "nonpayable", "virtual": false, "visibility": "internal" }, { "body": { "id": 1877, "nodeType": "Block", "src": "5751:257:11", "statements": [ { "expression": { "arguments": [ { "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 1849, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 1844, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1836, "src": "5769:5:11", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "arguments": [ { "hexValue": "30", "id": 1847, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "5786:1:11", "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" } ], "id": 1846, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "5778:7:11", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 1845, "name": "address", "nodeType": "ElementaryTypeName", "src": "5778:7:11", "typeDescriptions": {} } }, "id": 1848, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "5778:10:11", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "5769:19:11", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "45524332303a20617070726f76652066726f6d20746865207a65726f2061646472657373", "id": 1850, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "5790:38:11", "typeDescriptions": { "typeIdentifier": "t_stringliteral_c953f4879035ed60e766b34720f656aab5c697b141d924c283124ecedb91c208", "typeString": "literal_string \"ERC20: approve from the zero address\"" }, "value": "ERC20: approve from the zero address" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_c953f4879035ed60e766b34720f656aab5c697b141d924c283124ecedb91c208", "typeString": "literal_string \"ERC20: approve from the zero address\"" } ], "id": 1843, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 4294967278, 4294967278 ], "referencedDeclaration": 4294967278, "src": "5761:7:11", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 1851, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "5761:68:11", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1852, "nodeType": "ExpressionStatement", "src": "5761:68:11" }, { "expression": { "arguments": [ { "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 1859, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 1854, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1838, "src": "5847:7:11", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "arguments": [ { "hexValue": "30", "id": 1857, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "5866:1:11", "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" } ], "id": 1856, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "5858:7:11", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 1855, "name": "address", "nodeType": "ElementaryTypeName", "src": "5858:7:11", "typeDescriptions": {} } }, "id": 1858, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "5858:10:11", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "5847:21:11", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "45524332303a20617070726f766520746f20746865207a65726f2061646472657373", "id": 1860, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "5870:36:11", "typeDescriptions": { "typeIdentifier": "t_stringliteral_24883cc5fe64ace9d0df1893501ecb93c77180f0ff69cca79affb3c316dc8029", "typeString": "literal_string \"ERC20: approve to the zero address\"" }, "value": "ERC20: approve to the zero address" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_24883cc5fe64ace9d0df1893501ecb93c77180f0ff69cca79affb3c316dc8029", "typeString": "literal_string \"ERC20: approve to the zero address\"" } ], "id": 1853, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 4294967278, 4294967278 ], "referencedDeclaration": 4294967278, "src": "5839:7:11", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 1861, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "5839:68:11", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1862, "nodeType": "ExpressionStatement", "src": "5839:68:11" }, { "expression": { "id": 1869, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "baseExpression": { "baseExpression": { "id": 1863, "name": "_allowances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1573, "src": "5918:11:11", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_mapping$_t_address_$_t_uint256_$_$", "typeString": "mapping(address => mapping(address => uint256))" } }, "id": 1866, "indexExpression": { "id": 1864, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1836, "src": "5930:5:11", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "5918:18:11", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 1867, "indexExpression": { "id": 1865, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1838, "src": "5937:7:11", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "5918:27:11", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "id": 1868, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1840, "src": "5948:6:11", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "5918:36:11", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 1870, "nodeType": "ExpressionStatement", "src": "5918:36:11" }, { "eventCall": { "arguments": [ { "id": 1872, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1836, "src": "5978:5:11", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 1873, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1838, "src": "5985:7:11", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 1874, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1840, "src": "5994:6:11", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 1871, "name": "Approval", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2697, "src": "5969:8:11", "typeDescriptions": { "typeIdentifier": "t_function_event_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 1875, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "5969:32:11", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1876, "nodeType": "EmitStatement", "src": "5964:37:11" } ] }, "documentation": { "id": 1834, "nodeType": "StructuredDocumentation", "src": "5257:414:11", "text": " @dev Sets `amount` as the allowance of `spender` over the `owner`s tokens.\n This is internal function is equivalent to `approve`, and can be used to\n e.g. set automatic allowances for certain subsystems, etc.\n Emits an {Approval} event.\n Requirements:\n - `owner` cannot be the zero address.\n - `spender` cannot be the zero address." }, "id": 1878, "implemented": true, "kind": "function", "modifiers": [], "name": "_approve", "nodeType": "FunctionDefinition", "parameters": { "id": 1841, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1836, "mutability": "mutable", "name": "owner", "nodeType": "VariableDeclaration", "scope": 1878, "src": "5694:13:11", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 1835, "name": "address", "nodeType": "ElementaryTypeName", "src": "5694:7:11", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 1838, "mutability": "mutable", "name": "spender", "nodeType": "VariableDeclaration", "scope": 1878, "src": "5709:15:11", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 1837, "name": "address", "nodeType": "ElementaryTypeName", "src": "5709:7:11", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 1840, "mutability": "mutable", "name": "amount", "nodeType": "VariableDeclaration", "scope": 1878, "src": "5726:14:11", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 1839, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "5726:7:11", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "5693:48:11" }, "returnParameters": { "id": 1842, "nodeType": "ParameterList", "parameters": [], "src": "5751:0:11" }, "scope": 1879, "src": "5676:332:11", "stateMutability": "nonpayable", "virtual": false, "visibility": "internal" } ], "scope": 1880, "src": "391:5619:11" } ], "src": "219:5792:11" }, "legacyAST": { "absolutePath": "/home/runner/work/predeploy-contracts/predeploy-contracts/contracts/token/Token.sol", "exportedSymbols": { "IERC20": [ 2698 ], "MultiCurrency": [ 1557 ], "SafeMath": [ 3057 ], "Token": [ 1879 ] }, "id": 1880, "license": "GPL-3.0-or-later", "nodeType": "SourceUnit", "nodes": [ { "id": 1559, "literals": [ "solidity", "^", "0.8", ".0" ], "nodeType": "PragmaDirective", "src": "219:23:11" }, { "absolutePath": "@openzeppelin/contracts/utils/math/SafeMath.sol", "file": "@openzeppelin/contracts/utils/math/SafeMath.sol", "id": 1560, "nodeType": "ImportDirective", "scope": 1880, "sourceUnit": 3058, "src": "244:57:11", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "@openzeppelin/contracts/token/ERC20/IERC20.sol", "file": "@openzeppelin/contracts/token/ERC20/IERC20.sol", "id": 1561, "nodeType": "ImportDirective", "scope": 1880, "sourceUnit": 2699, "src": "302:56:11", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "/home/runner/work/predeploy-contracts/predeploy-contracts/contracts/token/MultiCurrency.sol", "file": "./MultiCurrency.sol", "id": 1562, "nodeType": "ImportDirective", "scope": 1880, "sourceUnit": 1558, "src": "360:29:11", "symbolAliases": [], "unitAlias": "" }, { "abstract": false, "baseContracts": [ { "baseName": { "id": 1563, "name": "IERC20", "nodeType": "IdentifierPath", "referencedDeclaration": 2698, "src": "409:6:11" }, "id": 1564, "nodeType": "InheritanceSpecifier", "src": "409:6:11" } ], "contractDependencies": [ 2698 ], "contractKind": "contract", "fullyImplemented": true, "id": 1879, "linearizedBaseContracts": [ 1879, 2698 ], "name": "Token", "nodeType": "ContractDefinition", "nodes": [ { "id": 1567, "libraryName": { "id": 1565, "name": "SafeMath", "nodeType": "IdentifierPath", "referencedDeclaration": 3057, "src": "428:8:11" }, "nodeType": "UsingForDirective", "src": "422:27:11", "typeName": { "id": 1566, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "441:7:11", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } }, { "constant": false, "id": 1573, "mutability": "mutable", "name": "_allowances", "nodeType": "VariableDeclaration", "scope": 1879, "src": "455:69:11", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_mapping$_t_address_$_t_uint256_$_$", "typeString": "mapping(address => mapping(address => uint256))" }, "typeName": { "id": 1572, "keyType": { "id": 1568, "name": "address", "nodeType": "ElementaryTypeName", "src": "464:7:11", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "Mapping", "src": "455:49:11", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_mapping$_t_address_$_t_uint256_$_$", "typeString": "mapping(address => mapping(address => uint256))" }, "valueType": { "id": 1571, "keyType": { "id": 1569, "name": "address", "nodeType": "ElementaryTypeName", "src": 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"functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "1066:24:11", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" } }, "functionReturnParameters": 1600, "id": 1604, "nodeType": "Return", "src": "1059:31:11" } ] }, "documentation": { "id": 1596, "nodeType": "StructuredDocumentation", "src": "905:91:11", "text": " @dev Returns the number of decimals used to get its user representation." }, "functionSelector": "313ce567", "id": 1606, "implemented": true, "kind": "function", "modifiers": [], "name": "decimals", "nodeType": "FunctionDefinition", "parameters": { "id": 1597, "nodeType": "ParameterList", "parameters": [], "src": "1018:2:11" }, "returnParameters": { "id": 1600, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1599, "mutability": "mutable", "name": "", "nodeType": "VariableDeclaration", "scope": 1606, "src": "1042:5:11", "stateVariable": false, "storageLocation": "default", 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"totalSupply", "nodeType": "MemberAccess", "referencedDeclaration": 1500, "src": "1236:25:11", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$__$returns$_t_uint256_$", "typeString": "function () view returns (uint256)" } }, "id": 1615, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "1236:27:11", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "functionReturnParameters": 1612, "id": 1616, "nodeType": "Return", "src": "1229:34:11" } ] }, "documentation": { "id": 1607, "nodeType": "StructuredDocumentation", "src": "1103:49:11", "text": " @dev See {IERC20-totalSupply}." }, "functionSelector": "18160ddd", "id": 1618, "implemented": true, "kind": "function", "modifiers": [], "name": "totalSupply", "nodeType": "FunctionDefinition", "overrides": { "id": 1609, "nodeType": "OverrideSpecifier", "overrides": [], "src": 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"Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1621, "src": "1444:7:11", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" } ], "expression": { "id": 1627, "name": "MultiCurrency", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1557, "src": "1420:13:11", "typeDescriptions": { "typeIdentifier": "t_type$_t_contract$_MultiCurrency_$1557_$", "typeString": "type(library MultiCurrency)" } }, "id": 1628, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "balanceOf", "nodeType": "MemberAccess", "referencedDeclaration": 1530, "src": "1420:23:11", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$_t_address_$returns$_t_uint256_$", "typeString": "function (address) view returns (uint256)" } }, "id": 1630, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "1420:32:11", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "functionReturnParameters": 1626, "id": 1631, "nodeType": "Return", "src": "1413:39:11" } ] }, "documentation": { "id": 1619, "nodeType": "StructuredDocumentation", "src": "1276:47:11", "text": " @dev See {IERC20-balanceOf}." }, "functionSelector": "70a08231", "id": 1633, "implemented": true, "kind": "function", "modifiers": [], "name": "balanceOf", "nodeType": "FunctionDefinition", "overrides": { "id": 1623, "nodeType": "OverrideSpecifier", "overrides": [], "src": "1376:8:11" }, "parameters": { "id": 1622, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1621, "mutability": "mutable", "name": "account", "nodeType": "VariableDeclaration", "scope": 1633, "src": "1347:15:11", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 1620, "name": "address", "nodeType": "ElementaryTypeName", "src": "1347:7:11", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" } ], "src": "1346:17:11" }, "returnParameters": { "id": 1626, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1625, "mutability": "mutable", "name": "", "nodeType": "VariableDeclaration", "scope": 1633, "src": "1394:7:11", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 1624, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "1394:7:11", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "1393:9:11" }, "scope": 1879, "src": "1328:131:11", "stateMutability": "view", "virtual": false, "visibility": "public" }, { "baseFunctions": [ 2647 ], "body": { "id": 1653, "nodeType": "Block", "src": "1746:78:11", "statements": [ { "expression": { "arguments": [ { "expression": { "id": 1645, "name": "msg", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4294967281, "src": "1766:3:11", "typeDescriptions": { "typeIdentifier": "t_magic_message", "typeString": "msg" } }, "id": 1646, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "sender", "nodeType": "MemberAccess", "src": "1766:10:11", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 1647, "name": "recipient", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1636, "src": "1778:9:11", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 1648, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1638, "src": "1789:6:11", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 1644, "name": "_transfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1833, "src": "1756:9:11", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 1649, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "1756:40:11", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1650, "nodeType": "ExpressionStatement", "src": "1756:40:11" }, { "expression": { "hexValue": "74727565", "id": 1651, "isConstant": false, "isLValue": false, "isPure": true, "kind": "bool", "lValueRequested": false, "nodeType": "Literal", "src": "1813:4:11", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "value": "true" }, "functionReturnParameters": 1643, "id": 1652, "nodeType": "Return", "src": "1806:11:11" } ] }, "documentation": { "id": 1634, "nodeType": "StructuredDocumentation", "src": "1465:192:11", "text": " @dev See {IERC20-transfer}.\n Requirements:\n - `recipient` cannot be the zero address.\n - the caller must have a balance of at least `amount`." }, "functionSelector": "a9059cbb", "id": 1654, "implemented": true, "kind": "function", "modifiers": [], "name": "transfer", "nodeType": "FunctionDefinition", "overrides": { "id": 1640, "nodeType": "OverrideSpecifier", "overrides": [], "src": "1722:8:11" }, "parameters": { "id": 1639, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1636, 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false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "1989:27:11", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "functionReturnParameters": 1664, "id": 1670, "nodeType": "Return", "src": "1982:34:11" } ] }, "documentation": { "id": 1655, "nodeType": "StructuredDocumentation", "src": "1830:47:11", "text": " @dev See {IERC20-allowance}." }, "functionSelector": "dd62ed3e", "id": 1672, "implemented": true, "kind": "function", "modifiers": [], "name": "allowance", "nodeType": "FunctionDefinition", "overrides": { "id": 1661, "nodeType": "OverrideSpecifier", "overrides": [], "src": "1945:8:11" }, "parameters": { "id": 1660, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1657, "mutability": "mutable", "name": "owner", "nodeType": "VariableDeclaration", "scope": 1672, "src": "1901:13:11", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 1656, "name": "address", "nodeType": "ElementaryTypeName", "src": "1901:7:11", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 1659, "mutability": "mutable", "name": "spender", "nodeType": "VariableDeclaration", "scope": 1672, "src": "1916:15:11", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 1658, "name": "address", "nodeType": "ElementaryTypeName", "src": "1916:7:11", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" } ], "src": "1900:32:11" }, "returnParameters": { "id": 1664, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1663, "mutability": "mutable", "name": "", "nodeType": "VariableDeclaration", "scope": 1672, "src": "1963:7:11", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 1662, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "1963:7:11", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "1962:9:11" }, "scope": 1879, "src": "1882:141:11", "stateMutability": "view", "virtual": false, "visibility": "public" }, { "baseFunctions": [ 2667 ], "body": { "id": 1692, "nodeType": "Block", "src": "2242:75:11", "statements": [ { "expression": { "arguments": [ { "expression": { "id": 1684, "name": "msg", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4294967281, "src": "2261:3:11", "typeDescriptions": { "typeIdentifier": "t_magic_message", "typeString": "msg" } }, "id": 1685, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "sender", "nodeType": "MemberAccess", "src": "2261:10:11", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 1686, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1675, "src": "2273:7:11", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 1687, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1677, "src": "2282:6:11", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 1683, "name": "_approve", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1878, "src": "2252:8:11", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 1688, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "2252:37:11", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1689, "nodeType": "ExpressionStatement", "src": "2252:37:11" }, { "expression": { "hexValue": "74727565", "id": 1690, "isConstant": false, "isLValue": false, "isPure": true, "kind": "bool", "lValueRequested": false, "nodeType": "Literal", "src": "2306:4:11", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "value": "true" }, "functionReturnParameters": 1682, "id": 1691, "nodeType": "Return", "src": "2299:11:11" } ] }, "documentation": { "id": 1673, "nodeType": "StructuredDocumentation", "src": "2029:127:11", "text": " @dev See {IERC20-approve}.\n Requirements:\n - `spender` cannot be the zero address." }, "functionSelector": "095ea7b3", "id": 1693, "implemented": true, "kind": "function", "modifiers": [], "name": "approve", "nodeType": "FunctionDefinition", "overrides": { "id": 1679, "nodeType": "OverrideSpecifier", "overrides": [], "src": "2218:8:11" }, "parameters": { "id": 1678, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1675, "mutability": "mutable", "name": "spender", "nodeType": "VariableDeclaration", "scope": 1693, "src": "2178:15:11", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 1674, "name": "address", "nodeType": "ElementaryTypeName", "src": "2178:7:11", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 1677, "mutability": "mutable", "name": "amount", "nodeType": "VariableDeclaration", "scope": 1693, "src": "2195:14:11", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 1676, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "2195:7:11", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "2177:33:11" }, "returnParameters": { "id": 1682, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1681, "mutability": "mutable", "name": "", "nodeType": "VariableDeclaration", "scope": 1693, "src": "2236:4:11", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "typeName": { "id": 1680, "name": "bool", "nodeType": "ElementaryTypeName", "src": "2236:4:11", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "visibility": "internal" } ], "src": "2235:6:11" }, "scope": 1879, "src": "2161:156:11", "stateMutability": "nonpayable", "virtual": false, "visibility": "public" }, { "baseFunctions": [ 2679 ], "body": { "id": 1730, "nodeType": "Block", "src": "2879:201:11", "statements": [ { "expression": { "arguments": [ { "id": 1707, "name": "sender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1696, "src": "2899:6:11", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 1708, "name": "recipient", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1698, "src": "2907:9:11", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 1709, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1700, "src": "2918:6:11", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 1706, "name": "_transfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1833, "src": "2889:9:11", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 1710, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "2889:36:11", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1711, "nodeType": "ExpressionStatement", "src": "2889:36:11" }, { "expression": { "arguments": [ { "id": 1713, "name": "sender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1696, "src": "2944:6:11", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "expression": { "id": 1714, "name": "msg", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4294967281, "src": "2952:3:11", "typeDescriptions": { "typeIdentifier": "t_magic_message", "typeString": "msg" } }, "id": 1715, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "sender", "nodeType": "MemberAccess", "src": "2952:10:11", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "arguments": [ { "id": 1723, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1700, "src": "3000:6:11", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, { "hexValue": "45524332303a207472616e7366657220616d6f756e74206578636565647320616c6c6f77616e6365", "id": 1724, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "3008:42:11", "typeDescriptions": { "typeIdentifier": "t_stringliteral_974d1b4421da69cc60b481194f0dad36a5bb4e23da810da7a7fb30cdba178330", "typeString": "literal_string \"ERC20: transfer amount exceeds allowance\"" }, "value": "ERC20: transfer amount exceeds allowance" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" }, { "typeIdentifier": "t_stringliteral_974d1b4421da69cc60b481194f0dad36a5bb4e23da810da7a7fb30cdba178330", "typeString": "literal_string \"ERC20: transfer amount exceeds allowance\"" } ], "expression": { "baseExpression": { "baseExpression": { "id": 1716, "name": "_allowances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1573, "src": "2964:11:11", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_mapping$_t_address_$_t_uint256_$_$", "typeString": "mapping(address => mapping(address => uint256))" } }, "id": 1718, "indexExpression": { "id": 1717, "name": "sender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1696, "src": "2976:6:11", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "2964:19:11", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 1721, "indexExpression": { "expression": { "id": 1719, "name": "msg", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4294967281, "src": "2984:3:11", "typeDescriptions": { "typeIdentifier": "t_magic_message", "typeString": "msg" } }, "id": 1720, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "sender", "nodeType": "MemberAccess", "src": "2984:10:11", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "2964:31:11", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 1722, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "sub", "nodeType": "MemberAccess", "referencedDeclaration": 3006, "src": "2964:35:11", "typeDescriptions": { "typeIdentifier": "t_function_internal_pure$_t_uint256_$_t_uint256_$_t_string_memory_ptr_$returns$_t_uint256_$bound_to$_t_uint256_$", "typeString": "function (uint256,uint256,string memory) pure returns (uint256)" } }, "id": 1725, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "2964:87:11", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 1712, "name": "_approve", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1878, "src": "2935:8:11", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 1726, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "2935:117:11", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1727, "nodeType": "ExpressionStatement", "src": "2935:117:11" }, { "expression": { "hexValue": "74727565", "id": 1728, "isConstant": false, "isLValue": false, "isPure": true, "kind": "bool", "lValueRequested": false, "nodeType": "Literal", "src": "3069:4:11", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "value": "true" }, "functionReturnParameters": 1705, "id": 1729, "nodeType": "Return", "src": "3062:11:11" } ] }, "documentation": { "id": 1694, "nodeType": "StructuredDocumentation", "src": "2323:447:11", "text": " @dev See {IERC20-transferFrom}.\n Emits an {Approval} event indicating the updated allowance. This is not\n required by the EIP. See the note at the beginning of {ERC20};\n Requirements:\n - `sender` and `recipient` cannot be the zero address.\n - `sender` must have a balance of at least `amount`.\n - the caller must have allowance for `sender`'s tokens of at least\n `amount`." }, "functionSelector": "23b872dd", "id": 1731, "implemented": true, "kind": "function", "modifiers": [], "name": "transferFrom", "nodeType": "FunctionDefinition", "overrides": { "id": 1702, "nodeType": "OverrideSpecifier", "overrides": [], "src": "2855:8:11" }, "parameters": { "id": 1701, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1696, "mutability": "mutable", "name": "sender", "nodeType": "VariableDeclaration", "scope": 1731, "src": "2797:14:11", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 1695, "name": "address", "nodeType": "ElementaryTypeName", "src": "2797:7:11", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 1698, "mutability": "mutable", "name": "recipient", "nodeType": "VariableDeclaration", "scope": 1731, "src": "2813:17:11", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 1697, "name": "address", "nodeType": "ElementaryTypeName", "src": "2813:7:11", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 1700, "mutability": "mutable", "name": "amount", "nodeType": "VariableDeclaration", "scope": 1731, "src": "2832:14:11", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 1699, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "2832:7:11", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "2796:51:11" }, "returnParameters": { "id": 1705, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1704, "mutability": "mutable", "name": "", "nodeType": "VariableDeclaration", "scope": 1731, "src": "2873:4:11", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "typeName": { "id": 1703, "name": "bool", "nodeType": "ElementaryTypeName", "src": "2873:4:11", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "visibility": "internal" } ], "src": "2872:6:11" }, "scope": 1879, "src": "2775:305:11", "stateMutability": "nonpayable", "virtual": false, "visibility": "public" }, { "body": { "id": 1758, "nodeType": "Block", "src": "3561:117:11", "statements": [ { "expression": { "arguments": [ { "expression": { "id": 1742, "name": "msg", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4294967281, "src": "3580:3:11", "typeDescriptions": { "typeIdentifier": "t_magic_message", "typeString": "msg" } }, "id": 1743, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "sender", "nodeType": "MemberAccess", "src": "3580:10:11", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 1744, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1734, "src": "3592:7:11", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "arguments": [ { "id": 1752, "name": "addedValue", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1736, "src": "3638:10:11", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "expression": { "baseExpression": { "baseExpression": { "id": 1745, "name": "_allowances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1573, "src": "3601:11:11", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_mapping$_t_address_$_t_uint256_$_$", "typeString": "mapping(address => mapping(address => uint256))" } }, "id": 1748, "indexExpression": { "expression": { "id": 1746, "name": "msg", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4294967281, "src": "3613:3:11", "typeDescriptions": { "typeIdentifier": "t_magic_message", "typeString": "msg" } }, "id": 1747, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "sender", "nodeType": "MemberAccess", "src": "3613:10:11", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "3601:23:11", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 1750, "indexExpression": { "id": 1749, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1734, "src": "3625:7:11", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "3601:32:11", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 1751, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "add", "nodeType": "MemberAccess", "referencedDeclaration": 2921, "src": "3601:36:11", "typeDescriptions": { "typeIdentifier": "t_function_internal_pure$_t_uint256_$_t_uint256_$returns$_t_uint256_$bound_to$_t_uint256_$", "typeString": "function (uint256,uint256) pure returns (uint256)" } }, "id": 1753, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "3601:48:11", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 1741, "name": "_approve", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1878, "src": "3571:8:11", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 1754, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "3571:79:11", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1755, "nodeType": "ExpressionStatement", "src": "3571:79:11" }, { "expression": { "hexValue": "74727565", "id": 1756, "isConstant": false, "isLValue": false, "isPure": true, "kind": "bool", "lValueRequested": false, "nodeType": "Literal", "src": "3667:4:11", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "value": "true" }, "functionReturnParameters": 1740, "id": 1757, "nodeType": "Return", "src": "3660:11:11" } ] }, "documentation": { "id": 1732, "nodeType": "StructuredDocumentation", "src": "3086:384:11", "text": " @dev Atomically increases the allowance granted to `spender` by the caller.\n This is an alternative to {approve} that can be used as a mitigation for\n problems described in {IERC20-approve}.\n Emits an {Approval} event indicating the updated allowance.\n Requirements:\n - `spender` cannot be the zero address." }, "functionSelector": "39509351", "id": 1759, "implemented": true, "kind": "function", "modifiers": [], "name": "increaseAllowance", "nodeType": "FunctionDefinition", "parameters": { "id": 1737, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1734, "mutability": "mutable", "name": "spender", "nodeType": "VariableDeclaration", "scope": 1759, "src": "3502:15:11", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 1733, "name": "address", "nodeType": "ElementaryTypeName", "src": "3502:7:11", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 1736, "mutability": "mutable", "name": "addedValue", "nodeType": "VariableDeclaration", "scope": 1759, "src": "3519:18:11", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 1735, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "3519:7:11", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "3501:37:11" }, "returnParameters": { "id": 1740, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1739, "mutability": "mutable", "name": "", "nodeType": "VariableDeclaration", "scope": 1759, "src": "3555:4:11", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "typeName": { "id": 1738, "name": "bool", "nodeType": "ElementaryTypeName", "src": "3555:4:11", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "visibility": "internal" } ], "src": "3554:6:11" }, "scope": 1879, "src": "3475:203:11", "stateMutability": "nonpayable", "virtual": false, "visibility": "public" }, { "body": { "id": 1787, "nodeType": "Block", "src": "4256:163:11", "statements": [ { "expression": { "arguments": [ { "expression": { "id": 1770, "name": "msg", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4294967281, "src": "4275:3:11", "typeDescriptions": { "typeIdentifier": "t_magic_message", "typeString": "msg" } }, "id": 1771, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "sender", "nodeType": "MemberAccess", "src": "4275:10:11", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 1772, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1762, "src": "4287:7:11", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "arguments": [ { "id": 1780, "name": "subtractedValue", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1764, "src": "4333:15:11", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, { "hexValue": "45524332303a2064656372656173656420616c6c6f77616e63652062656c6f77207a65726f", "id": 1781, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "4350:39:11", "typeDescriptions": { "typeIdentifier": "t_stringliteral_f8b476f7d28209d77d4a4ac1fe36b9f8259aa1bb6bddfa6e89de7e51615cf8a8", "typeString": "literal_string \"ERC20: decreased allowance below zero\"" }, "value": "ERC20: decreased allowance below zero" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" }, { "typeIdentifier": "t_stringliteral_f8b476f7d28209d77d4a4ac1fe36b9f8259aa1bb6bddfa6e89de7e51615cf8a8", "typeString": "literal_string \"ERC20: decreased allowance below zero\"" } ], "expression": { "baseExpression": { "baseExpression": { "id": 1773, "name": "_allowances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1573, "src": "4296:11:11", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_mapping$_t_address_$_t_uint256_$_$", "typeString": "mapping(address => mapping(address => uint256))" } }, "id": 1776, "indexExpression": { "expression": { "id": 1774, "name": "msg", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4294967281, "src": "4308:3:11", "typeDescriptions": { "typeIdentifier": "t_magic_message", "typeString": "msg" } }, "id": 1775, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "sender", "nodeType": "MemberAccess", "src": "4308:10:11", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "4296:23:11", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 1778, "indexExpression": { "id": 1777, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1762, "src": "4320:7:11", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "4296:32:11", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 1779, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "sub", "nodeType": "MemberAccess", "referencedDeclaration": 3006, "src": "4296:36:11", "typeDescriptions": { "typeIdentifier": "t_function_internal_pure$_t_uint256_$_t_uint256_$_t_string_memory_ptr_$returns$_t_uint256_$bound_to$_t_uint256_$", "typeString": "function (uint256,uint256,string memory) pure returns (uint256)" } }, "id": 1782, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "4296:94:11", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 1769, "name": "_approve", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1878, "src": "4266:8:11", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 1783, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "4266:125:11", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1784, "nodeType": "ExpressionStatement", "src": "4266:125:11" }, { "expression": { "hexValue": "74727565", "id": 1785, "isConstant": false, "isLValue": false, "isPure": true, "kind": "bool", "lValueRequested": false, "nodeType": "Literal", "src": "4408:4:11", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "value": "true" }, "functionReturnParameters": 1768, "id": 1786, "nodeType": "Return", "src": "4401:11:11" } ] }, "documentation": { "id": 1760, "nodeType": "StructuredDocumentation", "src": "3684:476:11", "text": " @dev Atomically decreases the allowance granted to `spender` by the caller.\n This is an alternative to {approve} that can be used as a mitigation for\n problems described in {IERC20-approve}.\n Emits an {Approval} event indicating the updated allowance.\n Requirements:\n - `spender` cannot be the zero address.\n - `spender` must have allowance for the caller of at least\n `subtractedValue`." }, "functionSelector": "a457c2d7", "id": 1788, "implemented": true, "kind": "function", "modifiers": [], "name": "decreaseAllowance", "nodeType": "FunctionDefinition", "parameters": { "id": 1765, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1762, "mutability": "mutable", "name": "spender", "nodeType": "VariableDeclaration", "scope": 1788, "src": "4192:15:11", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 1761, "name": "address", "nodeType": "ElementaryTypeName", "src": "4192:7:11", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 1764, "mutability": "mutable", "name": "subtractedValue", "nodeType": "VariableDeclaration", "scope": 1788, "src": "4209:23:11", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 1763, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "4209:7:11", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "4191:42:11" }, "returnParameters": { "id": 1768, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1767, "mutability": "mutable", "name": "", "nodeType": "VariableDeclaration", "scope": 1788, "src": "4250:4:11", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "typeName": { "id": 1766, "name": "bool", "nodeType": "ElementaryTypeName", "src": "4250:4:11", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "visibility": "internal" } ], "src": "4249:6:11" }, "scope": 1879, "src": "4165:254:11", "stateMutability": "nonpayable", "virtual": false, "visibility": "public" }, { "body": { "id": 1832, "nodeType": "Block", "src": "4972:279:11", "statements": [ { "expression": { "arguments": [ { "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 1804, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 1799, "name": "sender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1791, "src": "4990:6:11", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "arguments": [ { "hexValue": "30", "id": 1802, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "5008:1:11", "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" } ], "id": 1801, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "5000:7:11", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 1800, "name": "address", "nodeType": "ElementaryTypeName", "src": "5000:7:11", "typeDescriptions": {} } }, "id": 1803, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "5000:10:11", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "4990:20:11", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "45524332303a207472616e736665722066726f6d20746865207a65726f2061646472657373", "id": 1805, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "5012:39:11", "typeDescriptions": { "typeIdentifier": "t_stringliteral_baecc556b46f4ed0f2b4cb599d60785ac8563dd2dc0a5bf12edea1c39e5e1fea", "typeString": "literal_string \"ERC20: transfer from the zero address\"" }, "value": "ERC20: transfer from the zero address" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_baecc556b46f4ed0f2b4cb599d60785ac8563dd2dc0a5bf12edea1c39e5e1fea", "typeString": "literal_string \"ERC20: transfer from the zero address\"" } ], "id": 1798, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 4294967278, 4294967278 ], "referencedDeclaration": 4294967278, "src": "4982:7:11", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 1806, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "4982:70:11", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1807, "nodeType": "ExpressionStatement", "src": "4982:70:11" }, { "expression": { "arguments": [ { "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 1814, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 1809, "name": "recipient", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1793, "src": "5070:9:11", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "arguments": [ { "hexValue": "30", "id": 1812, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "5091:1:11", "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" } ], "id": 1811, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "5083:7:11", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 1810, "name": "address", "nodeType": "ElementaryTypeName", "src": "5083:7:11", "typeDescriptions": {} } }, "id": 1813, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "5083:10:11", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "5070:23:11", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "45524332303a207472616e7366657220746f20746865207a65726f2061646472657373", "id": 1815, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "5095:37:11", "typeDescriptions": { "typeIdentifier": "t_stringliteral_0557e210f7a69a685100a7e4e3d0a7024c546085cee28910fd17d0b081d9516f", "typeString": "literal_string \"ERC20: transfer to the zero address\"" }, "value": "ERC20: transfer to the zero address" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_0557e210f7a69a685100a7e4e3d0a7024c546085cee28910fd17d0b081d9516f", "typeString": "literal_string \"ERC20: transfer to the zero address\"" } ], "id": 1808, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 4294967278, 4294967278 ], "referencedDeclaration": 4294967278, "src": "5062:7:11", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 1816, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "5062:71:11", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1817, "nodeType": "ExpressionStatement", "src": "5062:71:11" }, { "expression": { "arguments": [ { "id": 1821, "name": "sender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1791, "src": "5167:6:11", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 1822, "name": "recipient", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1793, "src": "5175:9:11", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 1823, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1795, "src": "5186:6:11", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "expression": { "id": 1818, "name": "MultiCurrency", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1557, "src": "5144:13:11", "typeDescriptions": { "typeIdentifier": "t_type$_t_contract$_MultiCurrency_$1557_$", "typeString": "type(library MultiCurrency)" } }, "id": 1820, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "transfer", "nodeType": "MemberAccess", "referencedDeclaration": 1556, "src": "5144:22:11", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 1824, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "5144:49:11", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1825, "nodeType": "ExpressionStatement", "src": "5144:49:11" }, { "eventCall": { "arguments": [ { "id": 1827, "name": "sender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1791, "src": "5218:6:11", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 1828, "name": "recipient", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1793, "src": "5226:9:11", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 1829, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1795, "src": "5237:6:11", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 1826, "name": "Transfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2688, "src": "5209:8:11", "typeDescriptions": { "typeIdentifier": "t_function_event_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 1830, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "5209:35:11", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1831, "nodeType": "EmitStatement", "src": "5204:40:11" } ] }, "documentation": { "id": 1789, "nodeType": "StructuredDocumentation", "src": "4425:463:11", "text": " @dev Moves tokens `amount` from `sender` to `recipient`.\n This is internal function is equivalent to {transfer}, and can be used to\n e.g. implement automatic token fees, slashing mechanisms, etc.\n Emits a {Transfer} event.\n Requirements:\n - `sender` cannot be the zero address.\n - `recipient` cannot be the zero address.\n - `sender` must have a balance of at least `amount`." }, "id": 1833, "implemented": true, "kind": "function", "modifiers": [], "name": "_transfer", "nodeType": "FunctionDefinition", "parameters": { "id": 1796, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1791, "mutability": "mutable", "name": "sender", "nodeType": "VariableDeclaration", "scope": 1833, "src": "4912:14:11", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 1790, "name": "address", "nodeType": "ElementaryTypeName", "src": "4912:7:11", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 1793, "mutability": "mutable", "name": "recipient", "nodeType": "VariableDeclaration", "scope": 1833, "src": "4928:17:11", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 1792, "name": "address", "nodeType": "ElementaryTypeName", "src": "4928:7:11", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 1795, "mutability": "mutable", "name": "amount", "nodeType": "VariableDeclaration", "scope": 1833, "src": "4947:14:11", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 1794, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "4947:7:11", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "4911:51:11" }, "returnParameters": { "id": 1797, "nodeType": "ParameterList", "parameters": [], "src": "4972:0:11" }, "scope": 1879, "src": "4893:358:11", "stateMutability": "nonpayable", "virtual": false, "visibility": "internal" }, { "body": { "id": 1877, "nodeType": "Block", "src": "5751:257:11", "statements": [ { "expression": { "arguments": [ { "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 1849, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 1844, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1836, "src": "5769:5:11", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "arguments": [ { "hexValue": "30", "id": 1847, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "5786:1:11", "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" } ], "id": 1846, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "5778:7:11", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 1845, "name": "address", "nodeType": "ElementaryTypeName", "src": "5778:7:11", "typeDescriptions": {} } }, "id": 1848, "isConstant": false, "isLValue": false, 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"t_stringliteral_c953f4879035ed60e766b34720f656aab5c697b141d924c283124ecedb91c208", "typeString": "literal_string \"ERC20: approve from the zero address\"" } ], "id": 1843, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 4294967278, 4294967278 ], "referencedDeclaration": 4294967278, "src": "5761:7:11", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 1851, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "5761:68:11", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1852, "nodeType": "ExpressionStatement", "src": "5761:68:11" }, { "expression": { "arguments": [ { "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 1859, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 1854, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1838, "src": "5847:7:11", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "arguments": [ { "hexValue": "30", "id": 1857, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "5866:1:11", "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" } ], "id": 1856, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "5858:7:11", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 1855, "name": "address", "nodeType": "ElementaryTypeName", "src": "5858:7:11", "typeDescriptions": {} } }, "id": 1858, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "5858:10:11", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "5847:21:11", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "45524332303a20617070726f766520746f20746865207a65726f2061646472657373", "id": 1860, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "5870:36:11", "typeDescriptions": { "typeIdentifier": "t_stringliteral_24883cc5fe64ace9d0df1893501ecb93c77180f0ff69cca79affb3c316dc8029", "typeString": "literal_string \"ERC20: approve to the zero address\"" }, "value": "ERC20: approve to the zero address" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_24883cc5fe64ace9d0df1893501ecb93c77180f0ff69cca79affb3c316dc8029", "typeString": "literal_string \"ERC20: approve to the zero address\"" } ], "id": 1853, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 4294967278, 4294967278 ], "referencedDeclaration": 4294967278, "src": "5839:7:11", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 1861, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "5839:68:11", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1862, "nodeType": "ExpressionStatement", "src": "5839:68:11" }, { "expression": { "id": 1869, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "baseExpression": { "baseExpression": { "id": 1863, "name": "_allowances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1573, "src": "5918:11:11", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_mapping$_t_address_$_t_uint256_$_$", "typeString": "mapping(address => mapping(address => uint256))" } }, "id": 1866, "indexExpression": { "id": 1864, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1836, "src": "5930:5:11", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "5918:18:11", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 1867, "indexExpression": { "id": 1865, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1838, "src": "5937:7:11", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "5918:27:11", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "id": 1868, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1840, "src": "5948:6:11", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "5918:36:11", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 1870, "nodeType": "ExpressionStatement", "src": "5918:36:11" }, { "eventCall": { "arguments": [ { "id": 1872, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1836, "src": "5978:5:11", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 1873, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1838, "src": "5985:7:11", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 1874, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1840, "src": "5994:6:11", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 1871, "name": "Approval", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2697, "src": "5969:8:11", "typeDescriptions": { "typeIdentifier": "t_function_event_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 1875, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "5969:32:11", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1876, "nodeType": "EmitStatement", "src": "5964:37:11" } ] }, "documentation": { "id": 1834, "nodeType": "StructuredDocumentation", "src": "5257:414:11", "text": " @dev Sets `amount` as the allowance of `spender` over the `owner`s tokens.\n This is internal function is equivalent to `approve`, and can be used to\n e.g. set automatic allowances for certain subsystems, etc.\n Emits an {Approval} event.\n Requirements:\n - `owner` cannot be the zero address.\n - `spender` cannot be the zero address." }, "id": 1878, "implemented": true, "kind": "function", "modifiers": [], "name": "_approve", "nodeType": "FunctionDefinition", "parameters": { "id": 1841, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1836, "mutability": "mutable", "name": "owner", "nodeType": "VariableDeclaration", "scope": 1878, "src": "5694:13:11", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 1835, "name": "address", "nodeType": "ElementaryTypeName", "src": "5694:7:11", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 1838, "mutability": "mutable", "name": "spender", "nodeType": "VariableDeclaration", "scope": 1878, "src": "5709:15:11", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 1837, "name": "address", "nodeType": "ElementaryTypeName", "src": "5709:7:11", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 1840, "mutability": "mutable", "name": "amount", "nodeType": "VariableDeclaration", "scope": 1878, "src": "5726:14:11", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 1839, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "5726:7:11", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "5693:48:11" }, "returnParameters": { "id": 1842, "nodeType": "ParameterList", "parameters": [], "src": "5751:0:11" }, "scope": 1879, "src": "5676:332:11", "stateMutability": "nonpayable", "virtual": false, "visibility": "internal" } ], "scope": 1880, "src": "391:5619:11" } ], "src": "219:5792:11" }, "compiler": { "name": "solc", "version": "0.8.0+commit.c7dfd78e.Emscripten.clang" }, "networks": {}, "schemaVersion": "3.3.1", "updatedAt": "2021-11-23T02:17:24.125Z", "devdoc": { "kind": "dev", "methods": { "allowance(address,address)": { "details": "See {IERC20-allowance}." }, "approve(address,uint256)": { "details": "See {IERC20-approve}. Requirements: - `spender` cannot be the zero address." }, "balanceOf(address)": { "details": "See {IERC20-balanceOf}." }, "decimals()": { "details": "Returns the number of decimals used to get its user representation." }, "decreaseAllowance(address,uint256)": { "details": "Atomically decreases the allowance granted to `spender` by the caller. This is an alternative to {approve} that can be used as a mitigation for problems described in {IERC20-approve}. Emits an {Approval} event indicating the updated allowance. Requirements: - `spender` cannot be the zero address. - `spender` must have allowance for the caller of at least `subtractedValue`." }, "increaseAllowance(address,uint256)": { "details": "Atomically increases the allowance granted to `spender` by the caller. This is an alternative to {approve} that can be used as a mitigation for problems described in {IERC20-approve}. Emits an {Approval} event indicating the updated allowance. Requirements: - `spender` cannot be the zero address." }, "name()": { "details": "Returns the name of the token." }, "symbol()": { "details": "Returns the symbol of the token, usually a shorter version of the name." }, "totalSupply()": { "details": "See {IERC20-totalSupply}." }, "transfer(address,uint256)": { "details": "See {IERC20-transfer}. Requirements: - `recipient` cannot be the zero address. - the caller must have a balance of at least `amount`." }, "transferFrom(address,address,uint256)": { "details": "See {IERC20-transferFrom}. Emits an {Approval} event indicating the updated allowance. This is not required by the EIP. See the note at the beginning of {ERC20}; Requirements: - `sender` and `recipient` cannot be the zero address. - `sender` must have a balance of at least `amount`. - the caller must have allowance for `sender`'s tokens of at least `amount`." } }, "version": 1 }, "userdoc": { "kind": "user", "methods": {}, "version": 1 } }