///File: @aragon/os/contracts/acl/IACL.sol

pragma solidity ^0.4.18;


interface IACL {
    function initialize(address permissionsCreator) public;
    function hasPermission(address who, address where, bytes32 what, bytes how) public view returns (bool);
}


///File: @aragon/os/contracts/common/IVaultRecoverable.sol

pragma solidity ^0.4.18;


interface IVaultRecoverable {
    function transferToVault(address token) external;

    function allowRecoverability(address token) public view returns (bool);
    function getRecoveryVault() public view returns (address);
}


///File: @aragon/os/contracts/kernel/IKernel.sol

pragma solidity ^0.4.18;





// This should be an interface, but interfaces can't inherit yet :(
contract IKernel is IVaultRecoverable {
    event SetApp(bytes32 indexed namespace, bytes32 indexed name, bytes32 indexed id, address app);

    function acl() public view returns (IACL);
    function hasPermission(address who, address where, bytes32 what, bytes how) public view returns (bool);

    function setApp(bytes32 namespace, bytes32 name, address app) public returns (bytes32 id);
    function getApp(bytes32 id) public view returns (address);
}


///File: @aragon/os/contracts/apps/AppStorage.sol

pragma solidity ^0.4.18;




contract AppStorage {
    IKernel public kernel;
    bytes32 public appId;
    address internal pinnedCode; // used by Proxy Pinned
    uint256 internal initializationBlock; // used by Initializable
    uint256[95] private storageOffset; // forces App storage to start at after 100 slots
    uint256 private offset;
}


///File: @aragon/os/contracts/common/Initializable.sol

pragma solidity ^0.4.18;




contract Initializable is AppStorage {
    modifier onlyInit {
        require(initializationBlock == 0);
        _;
    }

    modifier isInitialized {
        require(initializationBlock > 0);
        _;
    }

    /**
    * @return Block number in which the contract was initialized
    */
    function getInitializationBlock() public view returns (uint256) {
        return initializationBlock;
    }

    /**
    * @dev Function to be called by top level contract after initialization has finished.
    */
    function initialized() internal onlyInit {
        initializationBlock = getBlockNumber();
    }

    /**
    * @dev Returns the current block number.
    *      Using a function rather than `block.number` allows us to easily mock the block number in
    *      tests.
    */
    function getBlockNumber() internal view returns (uint256) {
        return block.number;
    }
}


///File: @aragon/os/contracts/common/EtherTokenConstant.sol

pragma solidity ^0.4.18;


// aragonOS and aragon-apps rely on address(0) to denote native ETH, in
// contracts where both tokens and ETH are accepted
contract EtherTokenConstant {
    address constant public ETH = address(0);
}


///File: @aragon/os/contracts/common/IsContract.sol

pragma solidity ^0.4.18;


contract IsContract {
    function isContract(address _target) internal view returns (bool) {
        if (_target == address(0)) {
            return false;
        }

        uint256 size;
        assembly { size := extcodesize(_target) }
        return size > 0;
    }
}


///File: @aragon/os/contracts/lib/zeppelin/token/ERC20Basic.sol

pragma solidity ^0.4.11;


/**
 * @title ERC20Basic
 * @dev Simpler version of ERC20 interface
 * @dev see https://github.com/ethereum/EIPs/issues/179
 */
contract ERC20Basic {
  function totalSupply() public view returns (uint256);
  function balanceOf(address who) public constant returns (uint256);
  function transfer(address to, uint256 value) public returns (bool);
  event Transfer(address indexed from, address indexed to, uint256 value);
}


///File: @aragon/os/contracts/lib/zeppelin/token/ERC20.sol

pragma solidity ^0.4.11;


import './ERC20Basic.sol';


/**
 * @title ERC20 interface
 * @dev see https://github.com/ethereum/EIPs/issues/20
 */
contract ERC20 is ERC20Basic {
  function allowance(address owner, address spender) public constant returns (uint256);
  function transferFrom(address from, address to, uint256 value) public returns (bool);
  function approve(address spender, uint256 value) public returns (bool);
  event Approval(address indexed owner, address indexed spender, uint256 value);
}


///File: @aragon/os/contracts/common/VaultRecoverable.sol

pragma solidity ^0.4.18;







contract VaultRecoverable is IVaultRecoverable, EtherTokenConstant, IsContract {
    /**
     * @notice Send funds to recovery Vault. This contract should never receive funds,
     *         but in case it does, this function allows one to recover them.
     * @param _token Token balance to be sent to recovery vault.
     */
    function transferToVault(address _token) external {
        require(allowRecoverability(_token));
        address vault = getRecoveryVault();
        require(isContract(vault));

        if (_token == ETH) {
            vault.transfer(this.balance);
        } else {
            uint256 amount = ERC20(_token).balanceOf(this);
            ERC20(_token).transfer(vault, amount);
        }
    }

    /**
    * @dev By default deriving from AragonApp makes it recoverable
    * @param token Token address that would be recovered
    * @return bool whether the app allows the recovery
    */
    function allowRecoverability(address token) public view returns (bool) {
        return true;
    }
}


///File: @aragon/os/contracts/evmscript/ScriptHelpers.sol

pragma solidity ^0.4.18;


library ScriptHelpers {
    // To test with JS and compare with actual encoder. Maintaining for reference.
    // t = function() { return IEVMScriptExecutor.at('0x4bcdd59d6c77774ee7317fc1095f69ec84421e49').contract.execScript.getData(...[].slice.call(arguments)).slice(10).match(/.{1,64}/g) }
    // run = function() { return ScriptHelpers.new().then(sh => { sh.abiEncode.call(...[].slice.call(arguments)).then(a => console.log(a.slice(2).match(/.{1,64}/g)) ) }) }
    // This is truly not beautiful but lets no daydream to the day solidity gets reflection features

    function abiEncode(bytes _a, bytes _b, address[] _c) public pure returns (bytes d) {
        return encode(_a, _b, _c);
    }

    function encode(bytes memory _a, bytes memory _b, address[] memory _c) internal pure returns (bytes memory d) {
        // A is positioned after the 3 position words
        uint256 aPosition = 0x60;
        uint256 bPosition = aPosition + 32 * abiLength(_a);
        uint256 cPosition = bPosition + 32 * abiLength(_b);
        uint256 length = cPosition + 32 * abiLength(_c);

        d = new bytes(length);
        assembly {
            // Store positions
            mstore(add(d, 0x20), aPosition)
            mstore(add(d, 0x40), bPosition)
            mstore(add(d, 0x60), cPosition)
        }

        // Copy memory to correct position
        copy(d, getPtr(_a), aPosition, _a.length);
        copy(d, getPtr(_b), bPosition, _b.length);
        copy(d, getPtr(_c), cPosition, _c.length * 32); // 1 word per address
    }

    function abiLength(bytes memory _a) internal pure returns (uint256) {
        // 1 for length +
        // memory words + 1 if not divisible for 32 to offset word
        return 1 + (_a.length / 32) + (_a.length % 32 > 0 ? 1 : 0);
    }

    function abiLength(address[] _a) internal pure returns (uint256) {
        // 1 for length + 1 per item
        return 1 + _a.length;
    }

    function copy(bytes _d, uint256 _src, uint256 _pos, uint256 _length) internal pure {
        uint dest;
        assembly {
            dest := add(add(_d, 0x20), _pos)
        }
        memcpy(dest, _src, _length + 32);
    }

    function getPtr(bytes memory _x) internal pure returns (uint256 ptr) {
        assembly {
            ptr := _x
        }
    }

    function getPtr(address[] memory _x) internal pure returns (uint256 ptr) {
        assembly {
            ptr := _x
        }
    }

    function getSpecId(bytes _script) internal pure returns (uint32) {
        return uint32At(_script, 0);
    }

    function uint256At(bytes _data, uint256 _location) internal pure returns (uint256 result) {
        assembly {
            result := mload(add(_data, add(0x20, _location)))
        }
    }

    function addressAt(bytes _data, uint256 _location) internal pure returns (address result) {
        uint256 word = uint256At(_data, _location);

        assembly {
            result := div(and(word, 0xffffffffffffffffffffffffffffffffffffffff000000000000000000000000),
            0x1000000000000000000000000)
        }
    }

    function uint32At(bytes _data, uint256 _location) internal pure returns (uint32 result) {
        uint256 word = uint256At(_data, _location);

        assembly {
            result := div(and(word, 0xffffffff00000000000000000000000000000000000000000000000000000000),
            0x100000000000000000000000000000000000000000000000000000000)
        }
    }

    function locationOf(bytes _data, uint256 _location) internal pure returns (uint256 result) {
        assembly {
            result := add(_data, add(0x20, _location))
        }
    }

    function toBytes(bytes4 _sig) internal pure returns (bytes) {
        bytes memory payload = new bytes(4);
        assembly { mstore(add(payload, 0x20), _sig) }
        return payload;
    }

    function memcpy(uint _dest, uint _src, uint _len) internal pure {
        uint256 src = _src;
        uint256 dest = _dest;
        uint256 len = _len;

        // Copy word-length chunks while possible
        for (; len >= 32; len -= 32) {
            assembly {
                mstore(dest, mload(src))
            }
            dest += 32;
            src += 32;
        }

        // Copy remaining bytes
        uint mask = 256 ** (32 - len) - 1;
        assembly {
            let srcpart := and(mload(src), not(mask))
            let destpart := and(mload(dest), mask)
            mstore(dest, or(destpart, srcpart))
        }
    }
}


///File: @aragon/os/contracts/evmscript/IEVMScriptExecutor.sol

pragma solidity ^0.4.18;


interface IEVMScriptExecutor {
    function execScript(bytes script, bytes input, address[] blacklist) external returns (bytes);
}


///File: @aragon/os/contracts/evmscript/IEVMScriptRegistry.sol

pragma solidity ^0.4.18;


contract EVMScriptRegistryConstants {
    /* Hardcoded constants to save gas
    // repeated definitions from KernelStorage, to avoid out of gas issues
    bytes32 constant public APP_ADDR_NAMESPACE = keccak256("app");

    bytes32 constant public EVMSCRIPT_REGISTRY_APP_ID = apmNamehash("evmreg");
    bytes32 constant public EVMSCRIPT_REGISTRY_APP = keccak256(APP_ADDR_NAMESPACE, EVMSCRIPT_REGISTRY_APP_ID);
    */
    bytes32 constant public APP_ADDR_NAMESPACE = 0xd6f028ca0e8edb4a8c9757ca4fdccab25fa1e0317da1188108f7d2dee14902fb;
    bytes32 constant public EVMSCRIPT_REGISTRY_APP_ID = 0xddbcfd564f642ab5627cf68b9b7d374fb4f8a36e941a75d89c87998cef03bd61;
    bytes32 constant public EVMSCRIPT_REGISTRY_APP = 0x34f01c17e9be6ddbf2c61f37b5b1fb9f1a090a975006581ad19bda1c4d382871;
}


interface IEVMScriptRegistry {
    function addScriptExecutor(address executor) external returns (uint id);
    function disableScriptExecutor(uint256 executorId) external;

    function getScriptExecutor(bytes script) public view returns (address);
}


///File: @aragon/os/contracts/evmscript/EVMScriptRunner.sol

pragma solidity ^0.4.18;








contract EVMScriptRunner is AppStorage, EVMScriptRegistryConstants {
    using ScriptHelpers for bytes;

    function runScript(bytes _script, bytes _input, address[] _blacklist) protectState internal returns (bytes output) {
        // TODO: Too much data flying around, maybe extracting spec id here is cheaper
        address executorAddr = getExecutor(_script);
        require(executorAddr != address(0));

        bytes memory calldataArgs = _script.encode(_input, _blacklist);
        bytes4 sig = IEVMScriptExecutor(0).execScript.selector;

        require(executorAddr.delegatecall(sig, calldataArgs));

        bytes memory ret = returnedDataDecoded();

        require(ret.length > 0);

        return ret;
    }

    function getExecutor(bytes _script) public view returns (IEVMScriptExecutor) {
        return IEVMScriptExecutor(getExecutorRegistry().getScriptExecutor(_script));
    }

    // TODO: Internal
    function getExecutorRegistry() internal view returns (IEVMScriptRegistry) {
        address registryAddr = kernel.getApp(EVMSCRIPT_REGISTRY_APP);
        return IEVMScriptRegistry(registryAddr);
    }

    /**
    * @dev copies and returns last's call data. Needs to ABI decode first
    */
    function returnedDataDecoded() internal pure returns (bytes ret) {
        assembly {
            let size := returndatasize
            switch size
            case 0 {}
            default {
                ret := mload(0x40) // free mem ptr get
                mstore(0x40, add(ret, add(size, 0x20))) // free mem ptr set
                returndatacopy(ret, 0x20, sub(size, 0x20)) // copy return data
            }
        }
        return ret;
    }

    modifier protectState {
        address preKernel = kernel;
        bytes32 preAppId = appId;
        _; // exec
        require(kernel == preKernel);
        require(appId == preAppId);
    }
}


///File: @aragon/os/contracts/acl/ACLSyntaxSugar.sol

pragma solidity ^0.4.18;


contract ACLSyntaxSugar {
    function arr() internal pure returns (uint256[] r) {}

    function arr(bytes32 _a) internal pure returns (uint256[] r) {
        return arr(uint256(_a));
    }

    function arr(bytes32 _a, bytes32 _b) internal pure returns (uint256[] r) {
        return arr(uint256(_a), uint256(_b));
    }

    function arr(address _a) internal pure returns (uint256[] r) {
        return arr(uint256(_a));
    }

    function arr(address _a, address _b) internal pure returns (uint256[] r) {
        return arr(uint256(_a), uint256(_b));
    }

    function arr(address _a, uint256 _b, uint256 _c) internal pure returns (uint256[] r) {
        return arr(uint256(_a), _b, _c);
    }

    function arr(address _a, uint256 _b) internal pure returns (uint256[] r) {
        return arr(uint256(_a), uint256(_b));
    }

    function arr(address _a, address _b, uint256 _c, uint256 _d, uint256 _e) internal pure returns (uint256[] r) {
        return arr(uint256(_a), uint256(_b), _c, _d, _e);
    }

    function arr(address _a, address _b, address _c) internal pure returns (uint256[] r) {
        return arr(uint256(_a), uint256(_b), uint256(_c));
    }

    function arr(address _a, address _b, uint256 _c) internal pure returns (uint256[] r) {
        return arr(uint256(_a), uint256(_b), uint256(_c));
    }

    function arr(uint256 _a) internal pure returns (uint256[] r) {
        r = new uint256[](1);
        r[0] = _a;
    }

    function arr(uint256 _a, uint256 _b) internal pure returns (uint256[] r) {
        r = new uint256[](2);
        r[0] = _a;
        r[1] = _b;
    }

    function arr(uint256 _a, uint256 _b, uint256 _c) internal pure returns (uint256[] r) {
        r = new uint256[](3);
        r[0] = _a;
        r[1] = _b;
        r[2] = _c;
    }

    function arr(uint256 _a, uint256 _b, uint256 _c, uint256 _d) internal pure returns (uint256[] r) {
        r = new uint256[](4);
        r[0] = _a;
        r[1] = _b;
        r[2] = _c;
        r[3] = _d;
    }

    function arr(uint256 _a, uint256 _b, uint256 _c, uint256 _d, uint256 _e) internal pure returns (uint256[] r) {
        r = new uint256[](5);
        r[0] = _a;
        r[1] = _b;
        r[2] = _c;
        r[3] = _d;
        r[4] = _e;
    }
}


contract ACLHelpers {
    function decodeParamOp(uint256 _x) internal pure returns (uint8 b) {
        return uint8(_x >> (8 * 30));
    }

    function decodeParamId(uint256 _x) internal pure returns (uint8 b) {
        return uint8(_x >> (8 * 31));
    }

    function decodeParamsList(uint256 _x) internal pure returns (uint32 a, uint32 b, uint32 c) {
        a = uint32(_x);
        b = uint32(_x >> (8 * 4));
        c = uint32(_x >> (8 * 8));
    }
}


///File: @aragon/os/contracts/apps/AragonApp.sol

pragma solidity ^0.4.18;








// ACLSyntaxSugar and EVMScriptRunner are not directly used by this contract, but are included so
// that they are automatically usable by subclassing contracts
contract AragonApp is AppStorage, Initializable, ACLSyntaxSugar, VaultRecoverable, EVMScriptRunner {
    modifier auth(bytes32 _role) {
        require(canPerform(msg.sender, _role, new uint256[](0)));
        _;
    }

    modifier authP(bytes32 _role, uint256[] params) {
        require(canPerform(msg.sender, _role, params));
        _;
    }

    function canPerform(address _sender, bytes32 _role, uint256[] params) public view returns (bool) {
        bytes memory how; // no need to init memory as it is never used
        if (params.length > 0) {
            uint256 byteLength = params.length * 32;
            assembly {
                how := params // forced casting
                mstore(how, byteLength)
            }
        }
        return address(kernel) == 0 || kernel.hasPermission(_sender, address(this), _role, how);
    }

    function getRecoveryVault() public view returns (address) {
        // Funds recovery via a vault is only available when used with a kernel
        require(address(kernel) != 0);
        return kernel.getRecoveryVault();
    }
}


///File: ./contracts/ILiquidPledgingPlugin.sol

pragma solidity ^0.4.0;

/*
    Copyright 2018, Jordi Baylina
    Contributors: Adrià Massanet <adria@codecontext.io>, RJ Ewing, Griff
    Green, Arthur Lunn

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/


/// @dev `ILiquidPledgingPlugin` is the basic interface for any
///  liquid pledging plugin
contract ILiquidPledgingPlugin {

    /// @notice Plugins are used (much like web hooks) to initiate an action
    ///  upon any donation, delegation, or transfer; this is an optional feature
    ///  and allows for extreme customization of the contract. This function
    ///  implements any action that should be initiated before a transfer.
    /// @param pledgeManager The admin or current manager of the pledge
    /// @param pledgeFrom This is the Id from which value will be transfered.
    /// @param pledgeTo This is the Id that value will be transfered to.    
    /// @param context The situation that is triggering the plugin:
    ///  0 -> Plugin for the owner transferring pledge to another party
    ///  1 -> Plugin for the first delegate transferring pledge to another party
    ///  2 -> Plugin for the second delegate transferring pledge to another party
    ///  ...
    ///  255 -> Plugin for the intendedProject transferring pledge to another party
    ///
    ///  256 -> Plugin for the owner receiving pledge to another party
    ///  257 -> Plugin for the first delegate receiving pledge to another party
    ///  258 -> Plugin for the second delegate receiving pledge to another party
    ///  ...
    ///  511 -> Plugin for the intendedProject receiving pledge to another party
    /// @param amount The amount of value that will be transfered.
    function beforeTransfer(
        uint64 pledgeManager,
        uint64 pledgeFrom,
        uint64 pledgeTo,
        uint64 context,
        address token,
        uint amount ) public returns (uint maxAllowed);

    /// @notice Plugins are used (much like web hooks) to initiate an action
    ///  upon any donation, delegation, or transfer; this is an optional feature
    ///  and allows for extreme customization of the contract. This function
    ///  implements any action that should be initiated after a transfer.
    /// @param pledgeManager The admin or current manager of the pledge
    /// @param pledgeFrom This is the Id from which value will be transfered.
    /// @param pledgeTo This is the Id that value will be transfered to.    
    /// @param context The situation that is triggering the plugin:
    ///  0 -> Plugin for the owner transferring pledge to another party
    ///  1 -> Plugin for the first delegate transferring pledge to another party
    ///  2 -> Plugin for the second delegate transferring pledge to another party
    ///  ...
    ///  255 -> Plugin for the intendedProject transferring pledge to another party
    ///
    ///  256 -> Plugin for the owner receiving pledge to another party
    ///  257 -> Plugin for the first delegate receiving pledge to another party
    ///  258 -> Plugin for the second delegate receiving pledge to another party
    ///  ...
    ///  511 -> Plugin for the intendedProject receiving pledge to another party
    ///  @param amount The amount of value that will be transfered.
    function afterTransfer(
        uint64 pledgeManager,
        uint64 pledgeFrom,
        uint64 pledgeTo,
        uint64 context,
        address token,
        uint amount
    ) public;
}


///File: ./contracts/LiquidPledgingStorage.sol

pragma solidity ^0.4.18;



/// @dev This is an interface for `LPVault` which serves as a secure storage for
///  the ETH that backs the Pledges, only after `LiquidPledging` authorizes
///  payments can Pledges be converted for ETH
interface ILPVault {
    function authorizePayment(bytes32 _ref, address _dest, address _token, uint _amount) public;
}

/// This contract contains all state variables used in LiquidPledging contracts
/// This is done to have everything in 1 location, b/c state variable layout
/// is MUST have be the same when performing an upgrade.
contract LiquidPledgingStorage {
    enum PledgeAdminType { Giver, Delegate, Project }
    enum PledgeState { Pledged, Paying, Paid }

    /// @dev This struct defines the details of a `PledgeAdmin` which are 
    ///  commonly referenced by their index in the `admins` array
    ///  and can own pledges and act as delegates
    struct PledgeAdmin { 
        PledgeAdminType adminType; // Giver, Delegate or Project
        address addr; // Account or contract address for admin
        uint64 commitTime;  // In seconds, used for time Givers' & Delegates' have to veto
        uint64 parentProject;  // Only for projects
        bool canceled;      //Always false except for canceled projects

        /// @dev if the plugin is 0x0 then nothing happens, if its an address
        // than that smart contract is called when appropriate
        ILiquidPledgingPlugin plugin; 
        string name;
        string url;  // Can be IPFS hash
    }

    struct Pledge {
        uint amount;
        uint64[] delegationChain; // List of delegates in order of authority
        uint64 owner; // PledgeAdmin
        uint64 intendedProject; // Used when delegates are sending to projects
        uint64 commitTime;  // When the intendedProject will become the owner
        uint64 oldPledge; // Points to the id that this Pledge was derived from
        address token;
        PledgeState pledgeState; //  Pledged, Paying, Paid
    }

    PledgeAdmin[] admins; //The list of pledgeAdmins 0 means there is no admin
    Pledge[] pledges;
    /// @dev this mapping allows you to search for a specific pledge's 
    ///  index number by the hash of that pledge
    mapping (bytes32 => uint64) hPledge2idx;

    // this whitelist is for non-proxied plugins
    mapping (bytes32 => bool) pluginContractWhitelist;
    // this whitelist is for proxied plugins
    mapping (address => bool) pluginInstanceWhitelist;
    bool public whitelistDisabled = false;

    ILPVault public vault;

    // reserve 50 slots for future upgrades.
    uint[50] private storageOffset;
}

///File: ./contracts/Pledges.sol

pragma solidity ^0.4.18;

/*
    Copyright 2017, Jordi Baylina, RJ Ewing
    Contributors: Adrià Massanet <adria@codecontext.io>, Griff Green,
                  Arthur Lunn

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/




contract Pledges is AragonApp, LiquidPledgingStorage {

    // Limits inserted to prevent large loops that could prevent canceling
    uint constant MAX_DELEGATES = 10;

    // a constant for when a delegate is requested that is not in the system
    uint64 constant  NOTFOUND = 0xFFFFFFFFFFFFFFFF;

/////////////////////////////
// Public constant functions
////////////////////////////

    /// @notice A constant getter that returns the total number of pledges
    /// @return The total number of Pledges in the system
    function numberOfPledges() external view returns (uint) {
        return pledges.length - 1;
    }

    /// @notice A getter that returns the details of the specified pledge
    /// @param idPledge the id number of the pledge being queried
    /// @return the amount, owner, the number of delegates (but not the actual
    ///  delegates, the intendedProject (if any), the current commit time and
    ///  the previous pledge this pledge was derived from
    function getPledge(uint64 idPledge) external view returns(
        uint amount,
        uint64 owner,
        uint64 nDelegates,
        uint64 intendedProject,
        uint64 commitTime,
        uint64 oldPledge,
        address token,
        PledgeState pledgeState
    ) {
        Pledge memory p = _findPledge(idPledge);
        amount = p.amount;
        owner = p.owner;
        nDelegates = uint64(p.delegationChain.length);
        intendedProject = p.intendedProject;
        commitTime = p.commitTime;
        oldPledge = p.oldPledge;
        token = p.token;
        pledgeState = p.pledgeState;
    }


////////////////////
// Internal methods
////////////////////

    /// @notice This creates a Pledge with an initial amount of 0 if one is not
    ///  created already; otherwise it finds the pledge with the specified
    ///  attributes; all pledges technically exist, if the pledge hasn't been
    ///  created in this system yet it simply isn't in the hash array
    ///  hPledge2idx[] yet
    /// @param owner The owner of the pledge being looked up
    /// @param delegationChain The list of delegates in order of authority
    /// @param intendedProject The project this pledge will Fund after the
    ///  commitTime has passed
    /// @param commitTime The length of time in seconds the Giver has to
    ///   veto when the Giver's delegates Pledge funds to a project
    /// @param oldPledge This value is used to store the pledge the current
    ///  pledge was came from, and in the case a Project is canceled, the Pledge
    ///  will revert back to it's previous state
    /// @param state The pledge state: Pledged, Paying, or state
    /// @return The hPledge2idx index number
    function _findOrCreatePledge(
        uint64 owner,
        uint64[] delegationChain,
        uint64 intendedProject,
        uint64 commitTime,
        uint64 oldPledge,
        address token,
        PledgeState state
    ) internal returns (uint64)
    {
        bytes32 hPledge = keccak256(delegationChain, owner, intendedProject, commitTime, oldPledge, token, state);
        uint64 id = hPledge2idx[hPledge];
        if (id > 0) {
            return id;
        }

        id = uint64(pledges.length);
        hPledge2idx[hPledge] = id;
        pledges.push(
            Pledge(
                0,
                delegationChain,
                owner,
                intendedProject,
                commitTime,
                oldPledge,
                token,
                state
            )
        );
        return id;
    }

    /// @param idPledge the id of the pledge to load from storage
    /// @return The Pledge
    function _findPledge(uint64 idPledge) internal view returns(Pledge storage) {
        require(idPledge < pledges.length);
        return pledges[idPledge];
    }

    /// @notice A getter that searches the delegationChain for the level of
    ///  authority a specific delegate has within a Pledge
    /// @param p The Pledge that will be searched
    /// @param idDelegate The specified delegate that's searched for
    /// @return If the delegate chain contains the delegate with the
    ///  `admins` array index `idDelegate` this returns that delegates
    ///  corresponding index in the delegationChain. Otherwise it returns
    ///  the NOTFOUND constant
    function _getDelegateIdx(Pledge p, uint64 idDelegate) internal pure returns(uint64) {
        for (uint i = 0; i < p.delegationChain.length; i++) {
            if (p.delegationChain[i] == idDelegate) {
                return uint64(i);
            }
        }
        return NOTFOUND;
    }

    /// @notice A getter to find how many old "parent" pledges a specific Pledge
    ///  had using a self-referential loop
    /// @param p The Pledge being queried
    /// @return The number of old "parent" pledges a specific Pledge had
    function _getPledgeLevel(Pledge p) internal view returns(uint) {
        if (p.oldPledge == 0) {
            return 0;
        }
        Pledge storage oldP = _findPledge(p.oldPledge);
        return _getPledgeLevel(oldP) + 1; // a loop lookup
    }
}