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"source": "pragma solidity ^0.4.22;\nimport \"./ForkonomicSystem.sol\";\nimport \"openzeppelin-solidity/contracts/math/SafeMath.sol\";\n\n\ncontract ForkonomicToken {\n using SafeMath for uint256;\n\n event Approval(address indexed _owner, bytes32 ownerBox, address indexed _spender,\n bytes32 spenderBox, uint _value, bytes32 branch);\n\n event Transfer(address indexed from,\n address to,\n bytes32 fromBox,\n bytes32 toBox,\n uint value,\n bytes32 branch);\n\n string public constant name = \"RealityToken\";\n string public constant symbol = \"RLT\";\n uint8 public constant decimals = 18; // 18 is the most common number of decimal places\n \n bytes32 constant NULL_HASH = \"\";\n\n // users balance changes are stored in the following mapping\n mapping(bytes32 => mapping(bytes32 => int256)) balanceChange; // user-account debits and credits\n\n // withdraws of tokens from other smart contracts can be stored here\n mapping(bytes32 => mapping(bytes32 => int256)) withdrawalRecord;\n\n // Spends, which may cause debits, can only go forwards.\n // That way when we check if you have enough to spend we only have to go backwards.\n mapping(bytes32 => uint256) public lastDebitWindows; // index of last user debits to stop you going backwards\n\n // allowances, as we have them in the ERC20 protocol \n mapping(bytes32 => mapping(bytes32 => mapping(bytes32=> uint256))) public allowed;\n\n uint256 public totalSupply;\n ForkonomicSystem public fSystem;\n\n constructor(ForkonomicSystem _fSystem, address[] initalFundingContracts)\n public {\n\n fSystem = _fSystem;\n bytes32 genesisBranchHash = fSystem.genesisBranchHash();\n uint256 numFunded = initalFundingContracts.length;\n\n require(numFunded < 12, \" too many funding accounts\");\n\n for (uint256 i=0; i < numFunded; i++) {\n bytes32 account = keccak256(abi.encodePacked(initalFundingContracts[i], NULL_HASH));\n balanceChange[genesisBranchHash][account] += 210000000000000;\n totalSupply += 210000000000000;\n }\n }\n\n function approve(address _spender, uint256 _amount, bytes32 _branch)\n public returns (bool success) {\n return approveBox(_spender, _amount, _branch, NULL_HASH, NULL_HASH);\n }\n\n function allowance(address owner, address spender, bytes32 branch)\n public constant returns (uint remaining) {\n return allowanceBox(owner, spender, branch, NULL_HASH, NULL_HASH);\n }\n\n function approveBox(address _spender, uint256 _amount, bytes32 _branch, bytes32 fromBox, bytes32 spenderBox)\n public returns (bool success) {\n bytes32 boxSpender = keccak256(abi.encodePacked(_spender, spenderBox));\n bytes32 boxFrom = keccak256(abi.encodePacked(msg.sender, fromBox));\n allowed[boxFrom][boxSpender][_branch] = _amount;\n emit Approval(msg.sender, fromBox, _spender, spenderBox, _amount, _branch);\n return true;\n }\n\n function allowanceBox(address owner, address spender, bytes32 branch, bytes32 senderBox, bytes32 receiverBox)\n public constant returns (uint remaining) {\n\n bytes32 spenderAccount = keccak256(abi.encodePacked(spender, senderBox));\n bytes32 ownerAccount = keccak256(abi.encodePacked(owner, receiverBox));\n return allowed[ownerAccount][spenderAccount][branch];\n }\n\n function balanceOf(address addr, bytes32 branch)\n public constant returns (uint256) {\n return balanceOfBox(addr, branch, NULL_HASH);\n }\n\n function balanceOfBox(address addr, bytes32 branch, bytes32 acct)\n public constant returns (uint256) {\n int256 bal = 0;\n while (branch != NULL_HASH) {\n bal += balanceChange[branch][keccak256(abi.encodePacked(addr, acct))];\n branch = fSystem.branchParentHash(branch);\n }\n return uint256(bal);\n }\n\n function isAmountSpendable(address addr, uint256 minBalance, bytes32 branchHash)\n public constant returns (bool) {\n return _isAmountSpendable(keccak256(abi.encodePacked(addr, NULL_HASH)), minBalance, branchHash);\n }\n\n function isAmountSpendableBox(address addr, uint256 minBalance, bytes32 branchHash, bytes32 box)\n public constant returns (bool) {\n return _isAmountSpendable(keccak256(abi.encodePacked(addr, box)), minBalance, branchHash);\n }\n\n function transfer(address addr, uint256 amount, bytes32 branch)\n public returns (bool) {\n return boxTransfer(addr, amount, branch, NULL_HASH, NULL_HASH);\n }\n\n function boxTransfer(address addr, uint256 amount, bytes32 branch, bytes32 fromBox, bytes32 toBox)\n public returns (bool) {\n uint256 branchWindow = fSystem.branchWindow(branch);\n\n require(amount <= 2100000000000000, \" sending amount bigger than totalSupply\");\n require(fSystem.doesBranchExist(branch), \" branch must exist\"); \n bytes32 account =keccak256(abi.encodePacked(msg.sender, fromBox));\n require(branchWindow >= lastDebitWindows[account], \" branchWindow >= lastDebitWindows[account]\"); // debits can't go backwards\n require(_isAmountSpendable((account), amount, branch), \" amount was not spendable\"); // can only spend what you have\n\n lastDebitWindows[account] = branchWindow;\n balanceChange[branch][account] -= int256(amount);\n balanceChange[branch][keccak256(abi.encodePacked(addr, toBox))] += int256(amount);\n\n emit Transfer(addr, msg.sender, fromBox, toBox, amount, branch);\n\n return true;\n }\n\n function transferFrom(address from, address to, uint256 amount, bytes32 branch)\n public returns (bool) {\n return boxTransferFrom(from, to, amount, branch, NULL_HASH, NULL_HASH);\n }\n\n function boxTransferFrom(address fromAddr, address toAddr, uint256 amount,\n bytes32 branch, bytes32 fromBox, bytes32 toBox)\n public returns (bool) {\n\n bytes32 boxFrom =keccak256(abi.encodePacked(fromAddr, fromBox));\n bytes32 boxTo = keccak256(abi.encodePacked(toAddr, toBox));\n bytes32 boxSender = keccak256(abi.encodePacked(msg.sender, toBox));\n require(allowed[boxFrom][boxSender][branch] >= amount);\n\n uint256 branchWindow = fSystem.branchWindow(branch);\n\n require(amount <= 2100000000000000, \" amount higher than totalSupply\");\n require(fSystem.doesBranchExist(branch), \"branch must exist\"); // branch must exist\n require(branchWindow >= lastDebitWindows[boxFrom], \"debits cant go backwards\"); // debits can't go backwards\n require(_isAmountSpendable((boxFrom), amount, branch), \"amount must be spendable\"); // can only spend what you have\n\n lastDebitWindows[boxFrom] = branchWindow;\n balanceChange[branch][boxFrom] -= int256(amount);\n balanceChange[branch][boxTo] += int256(amount);\n\n allowed[boxFrom][boxSender][branch] = allowed[boxFrom][boxSender][branch].sub(amount);\n\n emit Transfer(fromAddr, toAddr, NULL_HASH, NULL_HASH, amount, branch);\n\n return true;\n }\n\n function boxTransferFrom(address addr, address addrTo, uint256 amount, bytes32 branch, bytes32 fromBox)\n public returns (bool) {\n return boxTransferFrom(addr, addrTo, amount, branch, fromBox, NULL_HASH);\n }\n\n // record any withdrawal on a certain branch \n function recordBoxWithdrawal(address owner, bytes32 box, uint256 amount, bytes32 branch) public returns (bool) {\n require(fSystem.doesBranchExist(branch), \"branch must exist\");\n withdrawalRecord[branch][keccak256(abi.encodePacked(msg.sender, owner, box))] += int256(amount);\n return true;\n }\n\n // check whether a withdrawal has already happend\n function hasBoxWithdrawal(address owner, bytes32 box, bytes32 branchHash, bytes32 earliestPossibleBranch) \n public view returns (bool) {\n bytes32 id = keccak256(abi.encodePacked(msg.sender, owner, box));\n while (branchHash != NULL_HASH && branchHash != earliestPossibleBranch) {\n if (withdrawalRecord[branchHash][id] > 0) {\n return true;\n }\n branchHash = fSystem.branchParentHash(branchHash);\n }\n return false;\n }\n\n // check the sum of all withdrawals\n function recordedBoxWithdrawalAmount(address owner, bytes32 box,\n bytes32 branchHash, bytes32 earliestPossibleBranch) \n public view returns (uint256) {\n bytes32 id = keccak256(abi.encodePacked(msg.sender, owner, box));\n int256 bal = 0;\n while (branchHash != NULL_HASH && branchHash != earliestPossibleBranch) {\n bal += withdrawalRecord[branchHash][id];\n branchHash = fSystem.branchParentHash(branchHash);\n }\n require(branchHash != NULL_HASH, \" branch hash should not follow to the NULL_HASH\");\n return uint256(bal);\n }\n\n // Crawl up towards the root of the tree until we get enough, or return false if we never do.\n // You never have negative total balance above you, so if you have enough credit at any point then return.\n // This uses less gas than balanceOfAbove, which always has to go all the way to the root.\n function _isAmountSpendable(bytes32 acct, uint256 minBalance, bytes32 branchHash)\n public constant returns (bool) {\n require(minBalance <= 2100000000000000, \"amount bigger than totalSupply\");\n int256 bal = 0;\n int256 iminBalance = int256(minBalance);\n while (branchHash != NULL_HASH) {\n bal += balanceChange[branchHash][acct];\n branchHash = fSystem.branchParentHash(branchHash);\n if (bal >= iminBalance) {\n return true;\n }\n }\n return false;\n }\n\n}\n", "sourcePath": "@josojo/forkonomics-contracts/contracts/ForkonomicToken.sol", "ast": { "absolutePath": "@josojo/forkonomics-contracts/contracts/ForkonomicToken.sol", "exportedSymbols": { "ForkonomicToken": [ 6883 ] }, "id": 6884, "nodeType": "SourceUnit", "nodes": [ { "id": 5929, "literals": [ "solidity", "^", "0.4", ".22" ], "nodeType": "PragmaDirective", "src": "0:24:19" }, { "absolutePath": "@josojo/forkonomics-contracts/contracts/ForkonomicSystem.sol", "file": "./ForkonomicSystem.sol", "id": 5930, "nodeType": "ImportDirective", "scope": 6884, "sourceUnit": 5928, "src": "25:32:19", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "openzeppelin-solidity/contracts/math/SafeMath.sol", "file": "openzeppelin-solidity/contracts/math/SafeMath.sol", "id": 5931, "nodeType": "ImportDirective", "scope": 6884, "sourceUnit": 9166, "src": "58:59:19", "symbolAliases": [], "unitAlias": "" }, { "baseContracts": [], "contractDependencies": [], "contractKind": "contract", "documentation": null, "fullyImplemented": true, "id": 6883, "linearizedBaseContracts": [ 6883 ], "name": "ForkonomicToken", "nodeType": "ContractDefinition", "nodes": [ { "id": 5934, "libraryName": { "contractScope": null, "id": 5932, "name": "SafeMath", "nodeType": "UserDefinedTypeName", "referencedDeclaration": 9165, "src": "157:8:19", "typeDescriptions": { "typeIdentifier": "t_contract$_SafeMath_$9165", "typeString": "library SafeMath" } }, "nodeType": "UsingForDirective", "src": "151:27:19", "typeName": { "id": 5933, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "170:7:19", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } }, { "anonymous": false, "documentation": null, "id": 5948, "name": "Approval", "nodeType": "EventDefinition", "parameters": { "id": 5947, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 5936, "indexed": true, "name": "_owner", "nodeType": "VariableDeclaration", "scope": 5948, "src": "199:22:19", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 5935, "name": "address", "nodeType": "ElementaryTypeName", "src": "199:7:19", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 5938, "indexed": false, "name": "ownerBox", "nodeType": "VariableDeclaration", "scope": 5948, "src": "223:16:19", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, "typeName": { "id": 5937, "name": "bytes32", "nodeType": "ElementaryTypeName", "src": "223:7:19", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 5940, "indexed": true, "name": "_spender", "nodeType": "VariableDeclaration", "scope": 5948, "src": "241:24:19", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 5939, "name": "address", "nodeType": "ElementaryTypeName", "src": "241:7:19", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 5942, "indexed": false, "name": "spenderBox", "nodeType": "VariableDeclaration", "scope": 5948, "src": "275:18:19", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, "typeName": { "id": 5941, "name": "bytes32", "nodeType": "ElementaryTypeName", "src": "275:7:19", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 5944, "indexed": false, "name": "_value", "nodeType": "VariableDeclaration", "scope": 5948, "src": "295:11:19", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 5943, "name": "uint", "nodeType": "ElementaryTypeName", "src": "295:4:19", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 5946, "indexed": false, "name": "branch", "nodeType": "VariableDeclaration", "scope": 5948, "src": "308:14:19", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, "typeName": { "id": 5945, "name": "bytes32", "nodeType": "ElementaryTypeName", "src": "308:7:19", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "value": null, "visibility": "internal" } ], "src": "198:125:19" }, "src": "184:140:19" }, { "anonymous": false, "documentation": null, "id": 5962, "name": "Transfer", "nodeType": 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"t_address", "typeString": "address" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 5954, "indexed": false, "name": "fromBox", "nodeType": "VariableDeclaration", "scope": 5962, "src": "395:15:19", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, "typeName": { "id": 5953, "name": "bytes32", "nodeType": "ElementaryTypeName", "src": "395:7:19", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 5956, "indexed": false, "name": "toBox", "nodeType": "VariableDeclaration", "scope": 5962, "src": "420:13:19", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, "typeName": { "id": 5955, "name": "bytes32", "nodeType": "ElementaryTypeName", "src": "420:7:19", "typeDescriptions": { "typeIdentifier": 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"value": "RealityToken" }, "visibility": "public" }, { "constant": true, "id": 5968, "name": "symbol", "nodeType": "VariableDeclaration", "scope": 6883, "src": "535:37:19", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_string_memory", "typeString": "string" }, "typeName": { "id": 5966, "name": "string", "nodeType": "ElementaryTypeName", "src": "535:6:19", "typeDescriptions": { "typeIdentifier": "t_string_storage_ptr", "typeString": "string" } }, "value": { "argumentTypes": null, "hexValue": "524c54", "id": 5967, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "567:5:19", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_stringliteral_9c081cc912e332d6ab55711d4135b50cb0a1ea4e7373bdaaec428a25d29cea8f", "typeString": "literal_string \"RLT\"" }, "value": "RLT" }, "visibility": "public" }, { "constant": true, "id": 5971, "name": "decimals", "nodeType": "VariableDeclaration", "scope": 6883, "src": "578:35:19", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" }, "typeName": { "id": 5969, "name": "uint8", "nodeType": "ElementaryTypeName", "src": "578:5:19", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" } }, "value": { "argumentTypes": null, "hexValue": "3138", "id": 5970, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "611:2:19", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_18_by_1", "typeString": "int_const 18" }, "value": "18" }, "visibility": "public" }, { "constant": true, "id": 5974, "name": "NULL_HASH", "nodeType": "VariableDeclaration", "scope": 6883, "src": "675:31:19", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, "typeName": { "id": 5972, "name": "bytes32", "nodeType": "ElementaryTypeName", "src": "675:7:19", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "value": { "argumentTypes": null, "hexValue": "", "id": 5973, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "704:2:19", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_stringliteral_c5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470", "typeString": "literal_string \"\"" }, "value": "" }, "visibility": "internal" }, { "constant": false, "id": 5980, "name": "balanceChange", "nodeType": "VariableDeclaration", "scope": 6883, "src": "778:60:19", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_bytes32_$_t_mapping$_t_bytes32_$_t_int256_$_$", "typeString": "mapping(bytes32 => mapping(bytes32 => int256))" }, "typeName": { "id": 5979, "keyType": 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