{ "contractName": "TokenWrapper", "abi": [ { "constant": true, "inputs": [], "name": "name", "outputs": [ { "name": "", "type": "string" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [], "name": "hasInitialized", "outputs": [ { "name": "", "type": "bool" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": false, "inputs": [ { "name": "", "type": "address" }, { "name": "", "type": "uint256" } ], "name": "approve", "outputs": [ { "name": "", "type": "bool" } ], "payable": false, "stateMutability": "nonpayable", "type": "function" }, { "constant": false, "inputs": [ { "name": "", "type": "address" }, { "name": "", "type": "address" }, { "name": "", "type": "uint256" } ], "name": "transferFrom", "outputs": [ { "name": "", "type": "bool" } ], "payable": false, "stateMutability": "nonpayable", "type": "function" }, { "constant": true, "inputs": [ { "name": "_script", "type": "bytes" } ], "name": "getEVMScriptExecutor", "outputs": [ { "name": "", "type": "address" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [], "name": "getRecoveryVault", "outputs": [ { "name": "", "type": "address" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [ { "name": "token", "type": "address" } ], "name": "allowRecoverability", "outputs": [ { "name": "", "type": "bool" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [], "name": "appId", "outputs": [ { "name": "", "type": "bytes32" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [], "name": "getInitializationBlock", "outputs": [ { "name": "", "type": "uint256" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [], "name": "symbol", "outputs": [ { "name": "", "type": "string" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": false, "inputs": [ { "name": "_token", "type": "address" } ], "name": "transferToVault", "outputs": [], "payable": false, "stateMutability": "nonpayable", "type": "function" }, { "constant": true, "inputs": [ { "name": "_sender", "type": "address" }, { "name": "_role", "type": "bytes32" }, { "name": "_params", "type": "uint256[]" } ], "name": "canPerform", "outputs": [ { "name": "", "type": "bool" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [], "name": "getEVMScriptRegistry", "outputs": [ { "name": "", "type": "address" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": false, "inputs": [ { "name": "", "type": "address" }, { "name": "", "type": "uint256" } ], "name": "transfer", "outputs": [ { "name": "", "type": "bool" } ], "payable": false, "stateMutability": "nonpayable", "type": "function" }, { "constant": true, "inputs": [], "name": "kernel", "outputs": [ { "name": "", "type": "address" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [], "name": "depositedToken", "outputs": [ { "name": "", "type": "address" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [ { "name": "", "type": "address" }, { "name": "", "type": "address" } ], "name": "allowance", "outputs": [ { "name": "", "type": "uint256" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [], "name": "isPetrified", "outputs": [ { "name": "", "type": "bool" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "anonymous": false, "inputs": [ { "indexed": true, "name": "entity", "type": "address" }, { "indexed": false, "name": "amount", "type": "uint256" } ], "name": "Deposit", "type": "event" }, { "anonymous": false, "inputs": [ { "indexed": true, "name": "entity", "type": "address" }, { "indexed": false, "name": "amount", "type": "uint256" } ], "name": "Withdrawal", "type": "event" }, { "anonymous": false, "inputs": [ { "indexed": true, "name": "executor", "type": "address" }, { "indexed": false, "name": "script", "type": "bytes" }, { "indexed": false, "name": "input", "type": "bytes" }, { "indexed": false, "name": "returnData", "type": "bytes" } ], "name": "ScriptResult", "type": "event" }, { "anonymous": false, "inputs": [ { "indexed": true, "name": "vault", "type": "address" }, { "indexed": true, "name": "token", "type": "address" }, { "indexed": false, "name": "amount", "type": "uint256" } ], "name": "RecoverToVault", "type": "event" }, { "anonymous": false, "inputs": [ { "indexed": true, "name": "from", "type": "address" }, { "indexed": true, "name": "to", "type": "address" }, { "indexed": false, "name": "value", "type": "uint256" } ], "name": "Transfer", "type": "event" }, { "anonymous": false, "inputs": [ { "indexed": true, "name": "owner", "type": "address" }, { "indexed": true, "name": "spender", "type": "address" }, { "indexed": false, "name": "value", "type": "uint256" } ], "name": "Approval", "type": "event" }, { "constant": false, "inputs": [ { "name": "_depositedToken", "type": "address" }, { "name": "_name", "type": "string" }, { "name": "_symbol", "type": "string" } ], "name": "initialize", "outputs": [], "payable": false, "stateMutability": "nonpayable", "type": "function" }, { "constant": false, "inputs": [ { "name": "_amount", "type": "uint256" } ], "name": "deposit", "outputs": [], "payable": false, "stateMutability": "nonpayable", "type": "function" }, { "constant": false, "inputs": [ { "name": "_amount", "type": "uint256" } ], "name": "withdraw", "outputs": [], "payable": false, "stateMutability": "nonpayable", "type": "function" }, { "constant": true, "inputs": [ { "name": "_owner", "type": "address" } ], "name": "balanceOf", "outputs": [ { "name": "", "type": "uint256" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [], "name": "decimals", "outputs": [ { "name": "", "type": "uint8" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [], "name": "totalSupply", "outputs": [ { "name": "", "type": "uint256" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [ { "name": "_owner", "type": "address" }, { "name": "_blockNumber", "type": "uint256" } ], "name": "balanceOfAt", "outputs": [ { "name": "", "type": "uint256" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [ { "name": "_blockNumber", "type": "uint256" } ], "name": "totalSupplyAt", "outputs": [ { "name": "", "type": "uint256" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [], "name": "isForwarder", "outputs": [ { "name": "", "type": "bool" } ], "payable": false, "stateMutability": "pure", "type": "function" }, { "constant": false, "inputs": [ { "name": "_evmScript", "type": "bytes" } ], "name": "forward", "outputs": [], "payable": false, "stateMutability": "nonpayable", "type": "function" }, { "constant": true, "inputs": [ { "name": "_sender", "type": "address" }, { "name": "", "type": "bytes" } ], "name": "canForward", "outputs": [ { "name": "", "type": "bool" } ], "payable": false, "stateMutability": "view", "type": "function" } ], "metadata": "{\"compiler\":{\"version\":\"0.4.24+commit.e67f0147\"},\"language\":\"Solidity\",\"output\":{\"abi\":[{\"constant\":true,\"inputs\":[],\"name\":\"name\",\"outputs\":[{\"name\":\"\",\"type\":\"string\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[],\"name\":\"hasInitialized\",\"outputs\":[{\"name\":\"\",\"type\":\"bool\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":false,\"inputs\":[{\"name\":\"\",\"type\":\"address\"},{\"name\":\"\",\"type\":\"uint256\"}],\"name\":\"approve\",\"outputs\":[{\"name\":\"\",\"type\":\"bool\"}],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[],\"name\":\"totalSupply\",\"outputs\":[{\"name\":\"\",\"type\":\"uint256\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":false,\"inputs\":[{\"name\":\"\",\"type\":\"address\"},{\"name\":\"\",\"type\":\"address\"},{\"name\":\"\",\"type\":\"uint256\"}],\"name\":\"transferFrom\",\"outputs\":[{\"name\":\"\",\"type\":\"bool\"}],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[{\"name\":\"_script\",\"type\":\"bytes\"}],\"name\":\"getEVMScriptExecutor\",\"outputs\":[{\"name\":\"\",\"type\":\"address\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":false,\"inputs\":[{\"name\":\"_amount\",\"type\":\"uint256\"}],\"name\":\"withdraw\",\"outputs\":[],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[],\"name\":\"decimals\",\"outputs\":[{\"name\":\"\",\"type\":\"uint8\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[],\"name\":\"getRecoveryVault\",\"outputs\":[{\"name\":\"\",\"type\":\"address\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[{\"name\":\"_owner\",\"type\":\"address\"},{\"name\":\"_blockNumber\",\"type\":\"uint256\"}],\"name\":\"balanceOfAt\",\"outputs\":[{\"name\":\"\",\"type\":\"uint256\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[{\"name\":\"_owner\",\"type\":\"address\"}],\"name\":\"balanceOf\",\"outputs\":[{\"name\":\"\",\"type\":\"uint256\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[{\"name\":\"token\",\"type\":\"address\"}],\"name\":\"allowRecoverability\",\"outputs\":[{\"name\":\"\",\"type\":\"bool\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[],\"name\":\"appId\",\"outputs\":[{\"name\":\"\",\"type\":\"bytes32\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[],\"name\":\"getInitializationBlock\",\"outputs\":[{\"name\":\"\",\"type\":\"uint256\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":false,\"inputs\":[{\"name\":\"_depositedToken\",\"type\":\"address\"},{\"name\":\"_name\",\"type\":\"string\"},{\"name\":\"_symbol\",\"type\":\"string\"}],\"name\":\"initialize\",\"outputs\":[],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[],\"name\":\"symbol\",\"outputs\":[{\"name\":\"\",\"type\":\"string\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[{\"name\":\"_blockNumber\",\"type\":\"uint256\"}],\"name\":\"totalSupplyAt\",\"outputs\":[{\"name\":\"\",\"type\":\"uint256\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":false,\"inputs\":[{\"name\":\"_token\",\"type\":\"address\"}],\"name\":\"transferToVault\",\"outputs\":[],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[{\"name\":\"_sender\",\"type\":\"address\"},{\"name\":\"_role\",\"type\":\"bytes32\"},{\"name\":\"_params\",\"type\":\"uint256[]\"}],\"name\":\"canPerform\",\"outputs\":[{\"name\":\"\",\"type\":\"bool\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[],\"name\":\"getEVMScriptRegistry\",\"outputs\":[{\"name\":\"\",\"type\":\"address\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":false,\"inputs\":[{\"name\":\"\",\"type\":\"address\"},{\"name\":\"\",\"type\":\"uint256\"}],\"name\":\"transfer\",\"outputs\":[{\"name\":\"\",\"type\":\"bool\"}],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"constant\":false,\"inputs\":[{\"name\":\"_amount\",\"type\":\"uint256\"}],\"name\":\"deposit\",\"outputs\":[],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[{\"name\":\"_sender\",\"type\":\"address\"},{\"name\":\"\",\"type\":\"bytes\"}],\"name\":\"canForward\",\"outputs\":[{\"name\":\"\",\"type\":\"bool\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[],\"name\":\"kernel\",\"outputs\":[{\"name\":\"\",\"type\":\"address\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":false,\"inputs\":[{\"name\":\"_evmScript\",\"type\":\"bytes\"}],\"name\":\"forward\",\"outputs\":[],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[],\"name\":\"depositedToken\",\"outputs\":[{\"name\":\"\",\"type\":\"address\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[{\"name\":\"\",\"type\":\"address\"},{\"name\":\"\",\"type\":\"address\"}],\"name\":\"allowance\",\"outputs\":[{\"name\":\"\",\"type\":\"uint256\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[],\"name\":\"isPetrified\",\"outputs\":[{\"name\":\"\",\"type\":\"bool\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[],\"name\":\"isForwarder\",\"outputs\":[{\"name\":\"\",\"type\":\"bool\"}],\"payable\":false,\"stateMutability\":\"pure\",\"type\":\"function\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"name\":\"entity\",\"type\":\"address\"},{\"indexed\":false,\"name\":\"amount\",\"type\":\"uint256\"}],\"name\":\"Deposit\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"name\":\"entity\",\"type\":\"address\"},{\"indexed\":false,\"name\":\"amount\",\"type\":\"uint256\"}],\"name\":\"Withdrawal\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"name\":\"executor\",\"type\":\"address\"},{\"indexed\":false,\"name\":\"script\",\"type\":\"bytes\"},{\"indexed\":false,\"name\":\"input\",\"type\":\"bytes\"},{\"indexed\":false,\"name\":\"returnData\",\"type\":\"bytes\"}],\"name\":\"ScriptResult\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"name\":\"vault\",\"type\":\"address\"},{\"indexed\":true,\"name\":\"token\",\"type\":\"address\"},{\"indexed\":false,\"name\":\"amount\",\"type\":\"uint256\"}],\"name\":\"RecoverToVault\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"name\":\"from\",\"type\":\"address\"},{\"indexed\":true,\"name\":\"to\",\"type\":\"address\"},{\"indexed\":false,\"name\":\"value\",\"type\":\"uint256\"}],\"name\":\"Transfer\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"name\":\"owner\",\"type\":\"address\"},{\"indexed\":true,\"name\":\"spender\",\"type\":\"address\"},{\"indexed\":false,\"name\":\"value\",\"type\":\"uint256\"}],\"name\":\"Approval\",\"type\":\"event\"}],\"devdoc\":{\"methods\":{\"allowRecoverability(address)\":{\"details\":\"By default deriving from AragonApp makes it recoverable\",\"params\":{\"token\":\"Token address that would be recovered\"},\"return\":\"bool whether the app allows the recovery\"},\"canForward(address,bytes)\":{\"details\":\"IForwarder interface conformance\",\"params\":{\"_sender\":\"Address of the account intending to forward an action\"},\"return\":\"True if the given address can forward actions, false otherwise\"},\"canPerform(address,bytes32,uint256[])\":{\"details\":\"Check whether an action can be performed by a sender for a particular role on this app\",\"params\":{\"_params\":\"Permission params for the role\",\"_role\":\"Role on this app\",\"_sender\":\"Sender of the call\"},\"return\":\"Boolean indicating whether the sender has the permissions to perform the action. Always returns false if the app hasn't been initialized yet.\"},\"deposit(uint256)\":{\"details\":\"Only up to 2^192 - 1 tokens are ever allowed to be deposited, due to the underlying storage format.\",\"params\":{\"_amount\":\"Amount to wrap\"}},\"forward(bytes)\":{\"details\":\"IForwarder interface conformance. Forwards any token holder action.\",\"params\":{\"_evmScript\":\"Script being executed\"}},\"getInitializationBlock()\":{\"return\":\"Block number in which the contract was initialized\"},\"getRecoveryVault()\":{\"details\":\"Get the recovery vault for the app\",\"return\":\"Recovery vault address for the app\"},\"hasInitialized()\":{\"return\":\"Whether the contract has been initialized by the time of the current block\"},\"initialize(address,string,string)\":{\"params\":{\"_depositedToken\":\"The ERC20 token to be wrapped\",\"_name\":\"The wrapped token's name\",\"_symbol\":\"The wrapped token's symbol\"}},\"isForwarder()\":{\"details\":\"IForwarder interface conformance\",\"return\":\"Always true\"},\"transferToVault(address)\":{\"params\":{\"_token\":\"Token balance to be sent to recovery vault.\"}},\"withdraw(uint256)\":{\"params\":{\"_amount\":\"Amount to unwrap\"}}},\"title\":\"TokenWrapper\"},\"userdoc\":{\"methods\":{\"canForward(address,bytes)\":{\"notice\":\"Tells whether `_sender` can forward actions or not\"},\"deposit(uint256)\":{\"notice\":\"Wrap `@tokenAmount(self.depositedToken(): address, _amount)`\"},\"forward(bytes)\":{\"notice\":\"Execute desired action as a token holder\"},\"initialize(address,string,string)\":{\"notice\":\"Create a new \\\"wrapped\\\" checkpointed token that is convertible from a normal ERC20 token\"},\"isForwarder()\":{\"notice\":\"Tells whether the TokenWrapper app is a forwarder or not\"},\"transferToVault(address)\":{\"notice\":\"Send funds to recovery Vault. This contract should never receive funds, but in case it does, this function allows one to recover them.\"},\"withdraw(uint256)\":{\"notice\":\"Unwrap `@tokenAmount(self.depositedToken(): address, 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"source": "/*\n * SPDX-License-Identitifer: GPL-3.0-or-later\n */\n\npragma solidity 0.4.24;\n\nimport \"@aragon/os/contracts/apps/AragonApp.sol\";\nimport \"@aragon/os/contracts/common/IForwarder.sol\";\nimport \"@aragon/os/contracts/common/IsContract.sol\";\nimport \"@aragon/os/contracts/lib/math/SafeMath.sol\";\nimport \"@aragon/os/contracts/lib/token/ERC20.sol\";\n\nimport \"@aragonone/voting-connectors-contract-utils/contracts/Checkpointing.sol\";\nimport \"@aragonone/voting-connectors-contract-utils/contracts/CheckpointingHelpers.sol\";\nimport \"@aragonone/voting-connectors-contract-utils/contracts/ERC20ViewOnly.sol\";\nimport \"@aragonone/voting-connectors-contract-utils/contracts/interfaces/IERC20WithCheckpointing.sol\";\nimport \"@aragonone/voting-connectors-contract-utils/contracts/interfaces/IERC20WithDecimals.sol\";\n\n\n/**\n * @title TokenWrapper\n * @notice Wrapper around a normal ERC20 token that provides a \"view-only\" checkpointed ERC20\n * implementation for use with Voting apps.\n * It only supports up to 2^192 - 1 tokens being deposited (not taking into account decimals).\n * @dev Inspired by:\n * - MiniMe token\n * - https://github.com/MyBitFoundation/MyBit-DAO.tech/blob/master/apps/MyTokens/contracts/MyTokens.sol\n */\ncontract TokenWrapper is IERC20WithCheckpointing, IForwarder, IsContract, ERC20ViewOnly, AragonApp {\n using SafeMath for uint256;\n using SafeERC20 for ERC20;\n using Checkpointing for Checkpointing.History;\n using CheckpointingHelpers for uint256;\n\n string private constant ERROR_TOKEN_NOT_CONTRACT = \"TW_TOKEN_NOT_CONTRACT\";\n string private constant ERROR_DEPOSIT_AMOUNT_ZERO = \"TW_DEPOSIT_AMOUNT_ZERO\";\n string private constant ERROR_TOKEN_TRANSFER_FROM_FAILED = \"TW_TOKEN_TRANSFER_FROM_FAILED\";\n string private constant ERROR_WITHDRAW_AMOUNT_ZERO = \"TW_WITHDRAW_AMOUNT_ZERO\";\n string private constant ERROR_INVALID_WITHDRAW_AMOUNT = \"TW_INVALID_WITHDRAW_AMOUNT\";\n string private constant ERROR_TOKEN_TRANSFER_FAILED = \"TW_TOKEN_TRANSFER_FAILED\";\n string private constant ERROR_CAN_NOT_FORWARD = \"TW_CAN_NOT_FORWARD\";\n\n ERC20 public depositedToken;\n string public name;\n string public symbol;\n\n // Checkpointed balances of the deposited token by block number\n mapping (address => Checkpointing.History) internal balancesHistory;\n\n // Checkpointed total supply of the deposited token\n Checkpointing.History internal totalSupplyHistory;\n\n event Deposit(address indexed entity, uint256 amount);\n event Withdrawal(address indexed entity, uint256 amount);\n\n /**\n * @notice Create a new \"wrapped\" checkpointed token that is convertible from a normal ERC20 token\n * @param _depositedToken The ERC20 token to be wrapped\n * @param _name The wrapped token's name\n * @param _symbol The wrapped token's symbol\n */\n function initialize(ERC20 _depositedToken, string _name, string _symbol) external onlyInit {\n initialized();\n\n require(isContract(_depositedToken), ERROR_TOKEN_NOT_CONTRACT);\n\n depositedToken = _depositedToken;\n name = _name;\n symbol = _symbol;\n }\n\n /**\n * @notice Wrap `@tokenAmount(self.depositedToken(): address, _amount)`\n * @dev Only up to 2^192 - 1 tokens are ever allowed to be deposited, due to the underlying\n * storage format.\n * @param _amount Amount to wrap\n */\n function deposit(uint256 _amount) external isInitialized {\n require(_amount > 0, ERROR_DEPOSIT_AMOUNT_ZERO);\n\n // Fetch the outside ERC20 tokens\n require(depositedToken.safeTransferFrom(msg.sender, address(this), _amount), ERROR_TOKEN_TRANSFER_FROM_FAILED);\n\n // Then increase our wrapped token accounting\n uint256 currentBalance = balanceOf(msg.sender);\n uint256 newBalance = currentBalance.add(_amount);\n\n uint256 currentTotalSupply = totalSupply();\n uint256 newTotalSupply = currentTotalSupply.add(_amount);\n\n uint64 currentBlock = getBlockNumber64();\n balancesHistory[msg.sender].addCheckpoint(currentBlock, newBalance.toUint192Value());\n totalSupplyHistory.addCheckpoint(currentBlock, newTotalSupply.toUint192Value());\n\n emit Deposit(msg.sender, _amount);\n }\n\n /**\n * @notice Unwrap `@tokenAmount(self.depositedToken(): address, _amount)`\n * @param _amount Amount to unwrap\n */\n function withdraw(uint256 _amount) external isInitialized {\n require(_amount > 0, ERROR_WITHDRAW_AMOUNT_ZERO);\n\n uint256 currentBalance = balanceOf(msg.sender);\n require(_amount <= currentBalance, ERROR_INVALID_WITHDRAW_AMOUNT);\n\n // Decrease our wrapped token accounting\n uint256 newBalance = currentBalance.sub(_amount);\n\n uint256 currentTotalSupply = totalSupply();\n uint256 newTotalSupply = currentTotalSupply.sub(_amount);\n\n uint64 currentBlock = getBlockNumber64();\n balancesHistory[msg.sender].addCheckpoint(currentBlock, newBalance.toUint192Value());\n totalSupplyHistory.addCheckpoint(currentBlock, newTotalSupply.toUint192Value());\n\n // Then return ERC20 tokens\n require(depositedToken.safeTransfer(msg.sender, _amount), ERROR_TOKEN_TRANSFER_FAILED);\n\n emit Withdrawal(msg.sender, _amount);\n }\n\n // ERC20 fns - note that this token is a non-transferrable \"view-only\" implementation.\n // Users should only be changing balances by depositing and withdrawing tokens.\n // These functions do **NOT** revert if the app is uninitialized to stay compatible with normal ERC20s.\n\n function balanceOf(address _owner) public view returns (uint256) {\n return _balanceOfAt(_owner, getBlockNumber());\n }\n\n function decimals() public view returns (uint8) {\n // Decimals is optional; proxy to outside token\n return IERC20WithDecimals(depositedToken).decimals();\n }\n\n function totalSupply() public view returns (uint256) {\n return _totalSupplyAt(getBlockNumber());\n }\n\n // Checkpointed fns\n // These functions do **NOT** revert if the app is uninitialized to stay compatible with normal ERC20s.\n\n function balanceOfAt(address _owner, uint256 _blockNumber) public view returns (uint256) {\n return _balanceOfAt(_owner, _blockNumber);\n }\n\n function totalSupplyAt(uint256 _blockNumber) public view returns (uint256) {\n return _totalSupplyAt(_blockNumber);\n }\n\n // Forwarding fns\n\n /**\n * @notice Tells whether the TokenWrapper app is a forwarder or not\n * @dev IForwarder interface conformance\n * @return Always true\n */\n function isForwarder() public pure returns (bool) {\n return true;\n }\n\n /**\n * @notice Execute desired action as a token holder\n * @dev IForwarder interface conformance. Forwards any token holder action.\n * @param _evmScript Script being executed\n */\n function forward(bytes _evmScript) public {\n require(canForward(msg.sender, _evmScript), ERROR_CAN_NOT_FORWARD);\n bytes memory input = new bytes(0);\n\n // Add the wrapped token to the blacklist to disallow a token holder from interacting with\n // the token on this contract's behalf (e.g. maliciously causing a transfer).\n address[] memory blacklist = new address[](1);\n blacklist[0] = address(depositedToken);\n\n runScript(_evmScript, input, blacklist);\n }\n\n /**\n * @notice Tells whether `_sender` can forward actions or not\n * @dev IForwarder interface conformance\n * @param _sender Address of the account intending to forward an action\n * @return True if the given address can forward actions, false otherwise\n */\n function canForward(address _sender, bytes) public view returns (bool) {\n return hasInitialized() && balanceOf(_sender) > 0;\n }\n\n // Internal fns\n\n function _balanceOfAt(address _owner, uint256 _blockNumber) internal view returns (uint256) {\n return balancesHistory[_owner].getValueAt(_blockNumber.toUint64Time());\n }\n\n function _totalSupplyAt(uint256 _blockNumber) internal view returns (uint256) {\n return totalSupplyHistory.getValueAt(_blockNumber.toUint64Time());\n }\n}\n", "sourcePath": "/Users/brett/Development/aragon/voting-connectors/apps/token-wrapper/contracts/TokenWrapper.sol", "ast": { "absolutePath": "/Users/brett/Development/aragon/voting-connectors/apps/token-wrapper/contracts/TokenWrapper.sol", "exportedSymbols": { "TokenWrapper": [ 458 ] }, "id": 459, "nodeType": "SourceUnit", "nodes": [ { "id": 1, "literals": [ "solidity", "0.4", ".24" ], "nodeType": "PragmaDirective", "src": "57:23:0" }, { "absolutePath": "@aragon/os/contracts/apps/AragonApp.sol", "file": "@aragon/os/contracts/apps/AragonApp.sol", "id": 2, "nodeType": "ImportDirective", "scope": 459, "sourceUnit": 6121, "src": "82:49:0", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "@aragon/os/contracts/common/IForwarder.sol", "file": "@aragon/os/contracts/common/IForwarder.sol", "id": 3, "nodeType": "ImportDirective", "scope": 459, "sourceUnit": 6316, "src": "132:52:0", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "@aragon/os/contracts/common/IsContract.sol", "file": "@aragon/os/contracts/common/IsContract.sol", "id": 4, "nodeType": "ImportDirective", "scope": 459, "sourceUnit": 6470, "src": "185:52:0", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "@aragon/os/contracts/lib/math/SafeMath.sol", "file": "@aragon/os/contracts/lib/math/SafeMath.sol", "id": 5, "nodeType": "ImportDirective", "scope": 459, "sourceUnit": 9696, "src": "238:52:0", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "@aragon/os/contracts/lib/token/ERC20.sol", "file": "@aragon/os/contracts/lib/token/ERC20.sol", "id": 6, "nodeType": "ImportDirective", "scope": 459, "sourceUnit": 9926, "src": "291:50:0", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "@aragonone/voting-connectors-contract-utils/contracts/Checkpointing.sol", "file": "@aragonone/voting-connectors-contract-utils/contracts/Checkpointing.sol", "id": 7, "nodeType": "ImportDirective", "scope": 459, "sourceUnit": 10233, "src": "343:81:0", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "@aragonone/voting-connectors-contract-utils/contracts/CheckpointingHelpers.sol", "file": "@aragonone/voting-connectors-contract-utils/contracts/CheckpointingHelpers.sol", "id": 8, "nodeType": "ImportDirective", "scope": 459, "sourceUnit": 10292, "src": "425:88:0", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "@aragonone/voting-connectors-contract-utils/contracts/ERC20ViewOnly.sol", "file": "@aragonone/voting-connectors-contract-utils/contracts/ERC20ViewOnly.sol", "id": 9, "nodeType": "ImportDirective", "scope": 459, "sourceUnit": 10357, "src": "514:81:0", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "@aragonone/voting-connectors-contract-utils/contracts/interfaces/IERC20WithCheckpointing.sol", "file": "@aragonone/voting-connectors-contract-utils/contracts/interfaces/IERC20WithCheckpointing.sol", "id": 10, "nodeType": "ImportDirective", "scope": 459, "sourceUnit": 10379, "src": "596:102:0", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "@aragonone/voting-connectors-contract-utils/contracts/interfaces/IERC20WithDecimals.sol", "file": "@aragonone/voting-connectors-contract-utils/contracts/interfaces/IERC20WithDecimals.sol", "id": 11, "nodeType": "ImportDirective", "scope": 459, "sourceUnit": 10390, "src": "699:97:0", "symbolAliases": [], "unitAlias": "" }, { "baseContracts": [ { "arguments": null, "baseName": { "contractScope": null, "id": 12, "name": "IERC20WithCheckpointing", "nodeType": "UserDefinedTypeName", "referencedDeclaration": 10378, "src": "1251:23:0", "typeDescriptions": { "typeIdentifier": "t_contract$_IERC20WithCheckpointing_$10378", "typeString": "contract IERC20WithCheckpointing" } }, "id": 13, "nodeType": "InheritanceSpecifier", "src": "1251:23:0" }, { "arguments": null, "baseName": { "contractScope": null, "id": 14, "name": "IForwarder", "nodeType": "UserDefinedTypeName", "referencedDeclaration": 6315, "src": "1276:10:0", "typeDescriptions": { "typeIdentifier": "t_contract$_IForwarder_$6315", "typeString": "contract IForwarder" } }, "id": 15, "nodeType": "InheritanceSpecifier", "src": "1276:10:0" }, { "arguments": null, "baseName": { "contractScope": null, "id": 16, "name": "IsContract", "nodeType": "UserDefinedTypeName", "referencedDeclaration": 6469, "src": "1288:10:0", "typeDescriptions": { "typeIdentifier": "t_contract$_IsContract_$6469", "typeString": "contract IsContract" } }, "id": 17, "nodeType": "InheritanceSpecifier", "src": "1288:10:0" }, { "arguments": null, "baseName": { "contractScope": null, "id": 18, "name": "ERC20ViewOnly", "nodeType": "UserDefinedTypeName", "referencedDeclaration": 10356, "src": "1300:13:0", "typeDescriptions": { "typeIdentifier": "t_contract$_ERC20ViewOnly_$10356", "typeString": "contract ERC20ViewOnly" } }, "id": 19, "nodeType": "InheritanceSpecifier", "src": "1300:13:0" }, { "arguments": null, "baseName": { "contractScope": null, "id": 20, "name": "AragonApp", "nodeType": "UserDefinedTypeName", "referencedDeclaration": 6120, "src": "1315:9:0", "typeDescriptions": { "typeIdentifier": "t_contract$_AragonApp_$6120", "typeString": "contract AragonApp" } }, "id": 21, "nodeType": "InheritanceSpecifier", "src": "1315:9:0" } ], "contractDependencies": [ 5208, 5996, 6120, 6133, 6293, 6315, 6343, 6441, 6469, 6502, 6539, 6831, 7053, 7454, 7481, 8745, 9925, 10356, 10378 ], "contractKind": "contract", "documentation": "@title TokenWrapper\n@notice Wrapper around a normal ERC20 token that provides a \"view-only\" checkpointed ERC20\n implementation for use with Voting apps.\n It only supports up to 2^192 - 1 tokens being deposited (not taking into account decimals).\n@dev Inspired by:\n - MiniMe token\n - https://github.com/MyBitFoundation/MyBit-DAO.tech/blob/master/apps/MyTokens/contracts/MyTokens.sol", "fullyImplemented": true, "id": 458, "linearizedBaseContracts": [ 458, 6120, 5208, 7454, 8745, 7481, 6539, 7053, 10356, 6469, 6293, 6343, 6133, 6502, 6441, 6831, 5996, 6315, 10378, 9925 ], "name": "TokenWrapper", "nodeType": "ContractDefinition", "nodes": [ { "id": 24, "libraryName": { "contractScope": null, "id": 22, "name": "SafeMath", "nodeType": "UserDefinedTypeName", "referencedDeclaration": 9695, "src": "1337:8:0", "typeDescriptions": { "typeIdentifier": "t_contract$_SafeMath_$9695", "typeString": "library SafeMath" } }, "nodeType": "UsingForDirective", "src": "1331:27:0", "typeName": { "id": 23, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "1350:7:0", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } }, { "id": 27, "libraryName": { "contractScope": null, "id": 25, "name": "SafeERC20", "nodeType": "UserDefinedTypeName", "referencedDeclaration": 6784, "src": "1369:9:0", "typeDescriptions": { "typeIdentifier": "t_contract$_SafeERC20_$6784", "typeString": "library SafeERC20" } }, "nodeType": "UsingForDirective", "src": "1363:26:0", "typeName": { "contractScope": null, "id": 26, "name": "ERC20", "nodeType": "UserDefinedTypeName", "referencedDeclaration": 9925, "src": "1383:5:0", "typeDescriptions": { "typeIdentifier": "t_contract$_ERC20_$9925", "typeString": "contract ERC20" } } }, { "id": 30, "libraryName": { "contractScope": null, "id": 28, "name": "Checkpointing", "nodeType": "UserDefinedTypeName", "referencedDeclaration": 10232, "src": "1400:13:0", "typeDescriptions": { "typeIdentifier": "t_contract$_Checkpointing_$10232", "typeString": "library Checkpointing" } }, "nodeType": "UsingForDirective", "src": "1394:46:0", "typeName": { "contractScope": null, "id": 29, "name": "Checkpointing.History", "nodeType": "UserDefinedTypeName", "referencedDeclaration": 9939, "src": "1418:21:0", "typeDescriptions": { "typeIdentifier": "t_struct$_History_$9939_storage_ptr", "typeString": "struct Checkpointing.History" } } }, { "id": 33, "libraryName": { "contractScope": null, "id": 31, "name": "CheckpointingHelpers", "nodeType": "UserDefinedTypeName", "referencedDeclaration": 10291, "src": "1451:20:0", "typeDescriptions": { "typeIdentifier": "t_contract$_CheckpointingHelpers_$10291", "typeString": "library CheckpointingHelpers" } }, "nodeType": "UsingForDirective", "src": "1445:39:0", "typeName": { "id": 32, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "1476:7:0", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } }, { "constant": true, "id": 36, "name": "ERROR_TOKEN_NOT_CONTRACT", "nodeType": "VariableDeclaration", "scope": 458, "src": "1490:74:0", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_string_memory", "typeString": "string" }, "typeName": { "id": 34, "name": "string", "nodeType": "ElementaryTypeName", "src": "1490:6:0", "typeDescriptions": { "typeIdentifier": "t_string_storage_ptr", "typeString": "string" } }, "value": { "argumentTypes": null, "hexValue": "54575f544f4b454e5f4e4f545f434f4e5452414354", "id": 35, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "1541:23:0", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_stringliteral_7ba81676a24b6cf524098771d7efc06702eaa0dfca6e44c9bb1e29d99fcc8f7e", "typeString": "literal_string \"TW_TOKEN_NOT_CONTRACT\"" }, "value": "TW_TOKEN_NOT_CONTRACT" }, "visibility": "private" }, { "constant": true, "id": 39, "name": "ERROR_DEPOSIT_AMOUNT_ZERO", "nodeType": "VariableDeclaration", "scope": 458, "src": "1570:76:0", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_string_memory", "typeString": "string" }, "typeName": { "id": 37, "name": "string", "nodeType": "ElementaryTypeName", "src": "1570:6:0", "typeDescriptions": { "typeIdentifier": "t_string_storage_ptr", "typeString": "string" } }, "value": { "argumentTypes": null, "hexValue": "54575f4445504f5349545f414d4f554e545f5a45524f", "id": 38, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "1622:24:0", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_stringliteral_f7a6759aee557658c1e2eb38c2ea42778750eb14f91d098afe293237d7f52c03", "typeString": "literal_string \"TW_DEPOSIT_AMOUNT_ZERO\"" }, "value": "TW_DEPOSIT_AMOUNT_ZERO" }, "visibility": "private" }, { "constant": true, "id": 42, "name": "ERROR_TOKEN_TRANSFER_FROM_FAILED", "nodeType": "VariableDeclaration", "scope": 458, "src": "1652:90:0", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_string_memory", "typeString": "string" }, "typeName": { "id": 40, "name": "string", "nodeType": 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} ], "expression": { "argumentTypes": null, "id": 127, "name": "depositedToken", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 56, "src": "3535:14:0", "typeDescriptions": { "typeIdentifier": "t_contract$_ERC20_$9925", "typeString": "contract ERC20" } }, "id": 128, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "safeTransferFrom", "nodeType": "MemberAccess", "referencedDeclaration": 6647, "src": "3535:31:0", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_contract$_ERC20_$9925_$_t_address_$_t_address_$_t_uint256_$returns$_t_bool_$bound_to$_t_contract$_ERC20_$9925_$", "typeString": "function (contract ERC20,address,address,uint256) returns (bool)" } }, "id": 135, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "3535:67:0", "typeDescriptions": { "typeIdentifier": "t_bool", 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148, "name": "currentBalance", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 140, "src": "3779:14:0", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 149, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "add", "nodeType": "MemberAccess", "referencedDeclaration": 9673, "src": "3779:18:0", "typeDescriptions": { "typeIdentifier": "t_function_internal_pure$_t_uint256_$_t_uint256_$returns$_t_uint256_$bound_to$_t_uint256_$", "typeString": "function (uint256,uint256) pure returns (uint256)" } }, "id": 151, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "3779:27:0", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "VariableDeclarationStatement", "src": "3758:48:0" }, { "assignments": [ 154 ], "declarations": [ { "constant": false, "id": 154, "name": "currentTotalSupply", "nodeType": "VariableDeclaration", "scope": 197, "src": "3817:26:0", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 153, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "3817:7:0", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "id": 157, "initialValue": { "argumentTypes": null, "arguments": [], "expression": { "argumentTypes": [], "id": 155, "name": "totalSupply", "nodeType": "Identifier", "overloadedDeclarations": [ 323 ], "referencedDeclaration": 323, "src": "3846:11:0", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$__$returns$_t_uint256_$", "typeString": "function () view returns (uint256)" } }, "id": 156, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "3846:13:0", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "VariableDeclarationStatement", "src": "3817:42:0" }, { "assignments": [ 159 ], "declarations": [ { "constant": false, "id": 159, "name": "newTotalSupply", "nodeType": "VariableDeclaration", "scope": 197, "src": "3869:22:0", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 158, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "3869:7:0", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "id": 164, "initialValue": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 162, "name": "_amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 114, "src": "3917:7:0", "typeDescriptions": { 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"balancesHistory", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 64, "src": "3986:15:0", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_struct$_History_$9939_storage_$", "typeString": "mapping(address => struct Checkpointing.History storage ref)" } }, "id": 173, "indexExpression": { "argumentTypes": null, "expression": { "argumentTypes": null, "id": 171, "name": "msg", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 10404, "src": "4002:3:0", "typeDescriptions": { "typeIdentifier": "t_magic_message", "typeString": "msg" } }, "id": 172, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "sender", "nodeType": "MemberAccess", "referencedDeclaration": null, "src": "4002:10:0", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "3986:27:0", "typeDescriptions": { "typeIdentifier": "t_struct$_History_$9939_storage", "typeString": "struct Checkpointing.History storage ref" } }, "id": 174, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "memberName": "addCheckpoint", "nodeType": "MemberAccess", "referencedDeclaration": 10020, "src": "3986:41:0", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_struct$_History_$9939_storage_ptr_$_t_uint64_$_t_uint192_$returns$__$bound_to$_t_struct$_History_$9939_storage_ptr_$", "typeString": "function (struct Checkpointing.History storage pointer,uint64,uint192)" } }, "id": 179, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "3986:84:0", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 180, "nodeType": "ExpressionStatement", "src": "3986:84:0" }, { 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false, "isPure": false, "lValueRequested": false, "memberName": "sender", "nodeType": "MemberAccess", "referencedDeclaration": null, "src": "4183:10:0", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "argumentTypes": null, "id": 193, "name": "_amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 114, "src": "4195:7:0", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 190, "name": "Deposit", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 72, "src": "4175:7:0", "typeDescriptions": { "typeIdentifier": "t_function_event_nonpayable$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,uint256)" } }, "id": 194, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "4175:28:0", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 195, "nodeType": "EmitStatement", "src": "4170:33:0" } ] }, "documentation": "@notice Wrap `@tokenAmount(self.depositedToken(): address, _amount)`\n@dev Only up to 2^192 - 1 tokens are ever allowed to be deposited, due to the underlying\n storage format.\n@param _amount Amount to wrap", "id": 197, "implemented": true, "isConstructor": false, "isDeclaredConst": false, "modifiers": [ { "arguments": null, "id": 117, "modifierName": { "argumentTypes": null, "id": 116, "name": "isInitialized", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 6383, "src": "3403:13:0", "typeDescriptions": { "typeIdentifier": "t_modifier$__$", "typeString": "modifier ()" } }, "nodeType": "ModifierInvocation", "src": "3403:13:0" } ], "name": "deposit", "nodeType": "FunctionDefinition", "parameters": { "id": 115, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 114, "name": "_amount", "nodeType": "VariableDeclaration", "scope": 197, "src": "3377:15:0", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 113, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "3377:7:0", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "src": "3376:17:0" }, "payable": false, "returnParameters": { "id": 118, "nodeType": "ParameterList", "parameters": [], "src": "3417:0:0" }, "scope": 458, "src": "3360:850:0", "stateMutability": "nonpayable", "superFunction": null, "visibility": "external" }, { "body": { "id": 285, "nodeType": "Block", "src": "4407:838:0", "statements": [ { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "commonType": { 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"@aragonone/voting-connectors-contract-utils/contracts/interfaces/IERC20WithDecimals.sol", "id": 11, "nodeType": "ImportDirective", "scope": 459, "sourceUnit": 10390, "src": "699:97:0", "symbolAliases": [], "unitAlias": "" }, { "baseContracts": [ { "arguments": null, "baseName": { "contractScope": null, "id": 12, "name": "IERC20WithCheckpointing", "nodeType": "UserDefinedTypeName", "referencedDeclaration": 10378, "src": "1251:23:0", "typeDescriptions": { "typeIdentifier": "t_contract$_IERC20WithCheckpointing_$10378", "typeString": "contract IERC20WithCheckpointing" } }, "id": 13, "nodeType": "InheritanceSpecifier", "src": "1251:23:0" }, { "arguments": null, "baseName": { "contractScope": null, "id": 14, "name": "IForwarder", "nodeType": "UserDefinedTypeName", "referencedDeclaration": 6315, "src": "1276:10:0", "typeDescriptions": { "typeIdentifier": "t_contract$_IForwarder_$6315", "typeString": "contract IForwarder" } }, "id": 15, "nodeType": "InheritanceSpecifier", "src": "1276:10:0" }, { "arguments": null, "baseName": { "contractScope": null, "id": 16, "name": "IsContract", "nodeType": "UserDefinedTypeName", "referencedDeclaration": 6469, "src": "1288:10:0", "typeDescriptions": { "typeIdentifier": "t_contract$_IsContract_$6469", "typeString": "contract IsContract" } }, "id": 17, "nodeType": "InheritanceSpecifier", "src": "1288:10:0" }, { "arguments": null, "baseName": { "contractScope": null, "id": 18, "name": "ERC20ViewOnly", "nodeType": "UserDefinedTypeName", "referencedDeclaration": 10356, "src": "1300:13:0", "typeDescriptions": { "typeIdentifier": "t_contract$_ERC20ViewOnly_$10356", "typeString": "contract ERC20ViewOnly" } }, "id": 19, "nodeType": "InheritanceSpecifier", "src": "1300:13:0" }, { "arguments": null, "baseName": { "contractScope": null, "id": 20, "name": "AragonApp", "nodeType": "UserDefinedTypeName", "referencedDeclaration": 6120, "src": "1315:9:0", "typeDescriptions": { "typeIdentifier": "t_contract$_AragonApp_$6120", "typeString": "contract AragonApp" } }, "id": 21, "nodeType": "InheritanceSpecifier", "src": "1315:9:0" } ], "contractDependencies": [ 5208, 5996, 6120, 6133, 6293, 6315, 6343, 6441, 6469, 6502, 6539, 6831, 7053, 7454, 7481, 8745, 9925, 10356, 10378 ], "contractKind": "contract", "documentation": "@title TokenWrapper\n@notice Wrapper around a normal ERC20 token that provides a \"view-only\" checkpointed ERC20\n implementation for use with Voting apps.\n It only supports up to 2^192 - 1 tokens being deposited (not taking into account decimals).\n@dev Inspired by:\n - MiniMe token\n - https://github.com/MyBitFoundation/MyBit-DAO.tech/blob/master/apps/MyTokens/contracts/MyTokens.sol", "fullyImplemented": true, "id": 458, "linearizedBaseContracts": [ 458, 6120, 5208, 7454, 8745, 7481, 6539, 7053, 10356, 6469, 6293, 6343, 6133, 6502, 6441, 6831, 5996, 6315, 10378, 9925 ], "name": "TokenWrapper", "nodeType": "ContractDefinition", "nodes": [ { "id": 24, "libraryName": { "contractScope": null, "id": 22, "name": "SafeMath", "nodeType": "UserDefinedTypeName", "referencedDeclaration": 9695, "src": "1337:8:0", "typeDescriptions": { "typeIdentifier": "t_contract$_SafeMath_$9695", "typeString": "library SafeMath" } }, "nodeType": "UsingForDirective", "src": "1331:27:0", "typeName": { "id": 23, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "1350:7:0", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } }, { "id": 27, "libraryName": { "contractScope": null, "id": 25, "name": "SafeERC20", "nodeType": "UserDefinedTypeName", "referencedDeclaration": 6784, "src": "1369:9:0", "typeDescriptions": { "typeIdentifier": "t_contract$_SafeERC20_$6784", "typeString": "library SafeERC20" } }, "nodeType": "UsingForDirective", "src": "1363:26:0", "typeName": { "contractScope": null, "id": 26, "name": "ERC20", "nodeType": "UserDefinedTypeName", "referencedDeclaration": 9925, "src": "1383:5:0", "typeDescriptions": { "typeIdentifier": "t_contract$_ERC20_$9925", "typeString": "contract ERC20" } } }, { "id": 30, "libraryName": { "contractScope": null, "id": 28, "name": "Checkpointing", "nodeType": "UserDefinedTypeName", "referencedDeclaration": 10232, "src": "1400:13:0", "typeDescriptions": { "typeIdentifier": "t_contract$_Checkpointing_$10232", "typeString": "library Checkpointing" } }, "nodeType": "UsingForDirective", "src": "1394:46:0", "typeName": { "contractScope": null, "id": 29, "name": "Checkpointing.History", "nodeType": "UserDefinedTypeName", "referencedDeclaration": 9939, "src": "1418:21:0", "typeDescriptions": { "typeIdentifier": "t_struct$_History_$9939_storage_ptr", "typeString": "struct Checkpointing.History" } } }, { "id": 33, "libraryName": { "contractScope": null, "id": 31, "name": "CheckpointingHelpers", "nodeType": "UserDefinedTypeName", "referencedDeclaration": 10291, "src": "1451:20:0", "typeDescriptions": { "typeIdentifier": "t_contract$_CheckpointingHelpers_$10291", "typeString": "library CheckpointingHelpers" } }, "nodeType": 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"typeIdentifier": "t_stringliteral_413ce35ed93e8d8e54bd02240ebd5206b8286deb9f612747bf74e9b2c5a35ffd", "typeString": "literal_string \"TW_TOKEN_TRANSFER_FROM_FAILED\"" }, "value": "TW_TOKEN_TRANSFER_FROM_FAILED" }, "visibility": "private" }, { "constant": true, "id": 45, "name": "ERROR_WITHDRAW_AMOUNT_ZERO", "nodeType": "VariableDeclaration", "scope": 458, "src": "1748:78:0", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_string_memory", "typeString": "string" }, "typeName": { "id": 43, "name": "string", "nodeType": "ElementaryTypeName", "src": "1748:6:0", "typeDescriptions": { "typeIdentifier": "t_string_storage_ptr", "typeString": "string" } }, "value": { "argumentTypes": null, "hexValue": "54575f57495448445241575f414d4f554e545f5a45524f", "id": 44, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "1801:25:0", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_stringliteral_c3496688d3b7cf242c741d2469400ce5224f8de9d95f39ba4b05fcdb61d63679", "typeString": "literal_string \"TW_WITHDRAW_AMOUNT_ZERO\"" }, "value": "TW_WITHDRAW_AMOUNT_ZERO" }, "visibility": "private" }, { "constant": true, "id": 48, "name": "ERROR_INVALID_WITHDRAW_AMOUNT", "nodeType": "VariableDeclaration", "scope": 458, "src": "1832:84:0", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_string_memory", "typeString": "string" }, "typeName": { "id": 46, "name": "string", "nodeType": "ElementaryTypeName", "src": "1832:6:0", "typeDescriptions": { "typeIdentifier": "t_string_storage_ptr", "typeString": "string" } }, "value": { "argumentTypes": null, "hexValue": "54575f494e56414c49445f57495448445241575f414d4f554e54", "id": 47, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "1888:28:0", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_stringliteral_d0cd27344bdef631161748197f4aa8b773b68f5bd30c99c206ca894566552937", "typeString": "literal_string \"TW_INVALID_WITHDRAW_AMOUNT\"" }, "value": "TW_INVALID_WITHDRAW_AMOUNT" }, "visibility": "private" }, { "constant": true, "id": 51, "name": "ERROR_TOKEN_TRANSFER_FAILED", "nodeType": "VariableDeclaration", "scope": 458, "src": "1922:80:0", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_string_memory", "typeString": "string" }, "typeName": { "id": 49, "name": "string", "nodeType": "ElementaryTypeName", "src": "1922:6:0", "typeDescriptions": { "typeIdentifier": "t_string_storage_ptr", "typeString": "string" } }, "value": { "argumentTypes": null, "hexValue": "54575f544f4b454e5f5452414e534645525f4641494c4544", "id": 50, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "1976:26:0", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_stringliteral_ab63e88ec259ac0b8c242574caff6553c4e42776739cac9d71eb578671806581", "typeString": "literal_string \"TW_TOKEN_TRANSFER_FAILED\"" }, "value": "TW_TOKEN_TRANSFER_FAILED" }, "visibility": "private" }, { "constant": true, "id": 54, "name": "ERROR_CAN_NOT_FORWARD", "nodeType": "VariableDeclaration", "scope": 458, "src": "2008:68:0", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_string_memory", "typeString": "string" }, "typeName": { "id": 52, "name": "string", "nodeType": "ElementaryTypeName", "src": "2008:6:0", "typeDescriptions": { "typeIdentifier": "t_string_storage_ptr", "typeString": "string" } }, "value": { "argumentTypes": null, "hexValue": "54575f43414e5f4e4f545f464f5257415244", "id": 53, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "2056:20:0", "subdenomination": null, "typeDescriptions": { "typeIdentifier": 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"version": "0.4.24+commit.e67f0147.Emscripten.clang" }, "networks": {}, "schemaVersion": "3.2.0", "updatedAt": "2020-06-07T23:27:00.423Z", "devdoc": { "methods": { "allowRecoverability(address)": { "details": "By default deriving from AragonApp makes it recoverable", "params": { "token": "Token address that would be recovered" }, "return": "bool whether the app allows the recovery" }, "canForward(address,bytes)": { "details": "IForwarder interface conformance", "params": { "_sender": "Address of the account intending to forward an action" }, "return": "True if the given address can forward actions, false otherwise" }, "canPerform(address,bytes32,uint256[])": { "details": "Check whether an action can be performed by a sender for a particular role on this app", "params": { "_params": "Permission params for the role", "_role": "Role on this app", "_sender": "Sender of the call" }, "return": "Boolean indicating whether the sender has the permissions to perform the action. Always returns false if the app hasn't been initialized yet." }, "deposit(uint256)": { "details": "Only up to 2^192 - 1 tokens are ever allowed to be deposited, due to the underlying storage format.", "params": { "_amount": "Amount to wrap" } }, "forward(bytes)": { "details": "IForwarder interface conformance. Forwards any token holder action.", "params": { "_evmScript": "Script being executed" } }, "getInitializationBlock()": { "return": "Block number in which the contract was initialized" }, "getRecoveryVault()": { "details": "Get the recovery vault for the app", "return": "Recovery vault address for the app" }, "hasInitialized()": { "return": "Whether the contract has been initialized by the time of the current block" }, "initialize(address,string,string)": { "params": { "_depositedToken": "The ERC20 token to be wrapped", "_name": "The wrapped token's name", "_symbol": "The wrapped token's symbol" } }, "isForwarder()": { "details": "IForwarder interface conformance", "return": "Always true" }, "transferToVault(address)": { "params": { "_token": "Token balance to be sent to recovery vault." } }, "withdraw(uint256)": { "params": { "_amount": "Amount to unwrap" } } }, "title": "TokenWrapper" }, "userdoc": { "methods": { "canForward(address,bytes)": { "notice": "Tells whether `_sender` can forward actions or not" }, "deposit(uint256)": { "notice": "Wrap `@tokenAmount(self.depositedToken(): address, _amount)`" }, "forward(bytes)": { "notice": "Execute desired action as a token holder" }, "initialize(address,string,string)": { "notice": "Create a new \"wrapped\" checkpointed token that is convertible from a normal ERC20 token" }, "isForwarder()": { "notice": "Tells whether the TokenWrapper app is a forwarder or not" }, "transferToVault(address)": { "notice": "Send funds to recovery Vault. This contract should never receive funds, but in case it does, this function allows one to recover them." }, "withdraw(uint256)": { "notice": "Unwrap `@tokenAmount(self.depositedToken(): address, _amount)`" } } } }