{ "contractName": "IKToken", "abi": [ { "anonymous": false, "inputs": [ { "indexed": true, "internalType": "address", "name": "owner", "type": "address" }, { "indexed": true, "internalType": "address", "name": "spender", "type": "address" }, { "indexed": false, "internalType": "uint256", "name": "value", "type": "uint256" } ], "name": "Approval", "type": "event" }, { "anonymous": false, "inputs": [ { "indexed": false, "internalType": "address", "name": "minter", "type": "address" }, { "indexed": false, "internalType": "uint256", "name": "tokenAmount", "type": "uint256" }, { "indexed": false, "internalType": "uint256", "name": "kTokenAmount", "type": "uint256" } ], "name": "Mint", "type": "event" }, { "anonymous": false, "inputs": [ { "indexed": false, "internalType": "address", "name": "redeemer", "type": "address" }, { "indexed": false, "internalType": "uint256", "name": "tokenAmount", "type": "uint256" }, { "indexed": false, "internalType": "uint256", "name": "kTokenAmount", "type": 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"stateMutability": "nonpayable", "type": "function" }, { "constant": true, "inputs": [ { "internalType": "address", "name": "account", "type": "address" } ], "name": "balanceOf", "outputs": [ { "internalType": "uint256", "name": "", "type": "uint256" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [], "name": "totalSupply", "outputs": [ { "internalType": "uint256", "name": "", "type": "uint256" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": false, "inputs": [ { "internalType": "address", "name": "recipient", "type": "address" }, { "internalType": "uint256", "name": "amount", "type": "uint256" } ], "name": "transfer", "outputs": [ { "internalType": "bool", "name": "", "type": "bool" } ], "payable": false, "stateMutability": "nonpayable", "type": "function" }, { "constant": false, "inputs": [ { "internalType": "uint256", "name": "kTokenAmount", "type": "uint256" } ], "name": "redeem", "outputs": [ { "internalType": "bool", "name": "", "type": "bool" } ], "payable": false, "stateMutability": "nonpayable", "type": "function" }, { "constant": false, "inputs": [ { "internalType": "uint256", "name": "tokenAmount", "type": "uint256" } ], "name": "redeemUnderlying", "outputs": [ { "internalType": "bool", "name": "", "type": "bool" } ], "payable": false, "stateMutability": "nonpayable", "type": "function" }, { "constant": false, "inputs": [ { "internalType": "address", "name": "to", "type": "address" }, { "internalType": "uint256", "name": "amount", "type": "uint256" } ], "name": "transferUnderlying", "outputs": [ { "internalType": "bool", "name": "", "type": "bool" } ], "payable": false, "stateMutability": "nonpayable", "type": "function" }, { "constant": false, "inputs": [], "name": "lock", "outputs": [], "payable": false, "stateMutability": "nonpayable", "type": "function" }, { "constant": false, "inputs": [], "name": "unlock", "outputs": [], "payable": false, "stateMutability": "nonpayable", "type": "function" }, { "constant": false, "inputs": [ { "internalType": "address", "name": "sender", "type": "address" }, { "internalType": "address", "name": "recipient", "type": "address" }, { "internalType": "uint256", "name": "amount", "type": "uint256" } ], "name": "transferFrom", "outputs": [ { "internalType": "bool", "name": "", "type": "bool" } ], "payable": false, "stateMutability": "nonpayable", "type": "function" }, { "constant": true, "inputs": [ { "internalType": "uint256", "name": "tokenAmount", "type": "uint256" }, { "internalType": "bool", "name": "ceiling", "type": "bool" } ], "name": "tokenAmountToKTokenAmount", "outputs": [ { "internalType": "uint256", "name": "", "type": "uint256" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [ { "internalType": "uint256", "name": "kTokenAmount", "type": "uint256" } ], "name": "kTokenAmountToTokenAmount", "outputs": [ { "internalType": "uint256", "name": "", 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This is zero by default. * This value changes when {approve} or {transferFrom} are called.\"},\"approve(address,uint256)\":{\"details\":\"Sets `amount` as the allowance of `spender` over the caller's tokens. * Returns a boolean value indicating whether the operation succeeded. * IMPORTANT: Beware that changing an allowance with this method brings the risk that someone may use both the old and the new allowance by unfortunate transaction ordering. One possible solution to mitigate this race condition is to first reduce the spender's allowance to 0 and set the desired value afterwards: https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * Emits an {Approval} event.\"},\"balanceOf(address)\":{\"details\":\"Returns the amount of tokens owned by `account`.\"},\"totalSupply()\":{\"details\":\"Returns the amount of tokens in existence.\"},\"transfer(address,uint256)\":{\"details\":\"Moves `amount` tokens from the caller's account to `recipient`. * Returns a boolean value indicating whether the operation succeeded. * Emits a {Transfer} 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"", "source": "pragma solidity ^0.5.0;\n\nimport \"@openzeppelin/contracts/token/ERC20/IERC20.sol\";\n\ncontract IKToken is IERC20 {\n\n event Mint(address minter, uint256 tokenAmount, uint256 kTokenAmount);\n event Redeem(address redeemer, uint256 tokenAmount, uint256 kTokenAmount);\n\n /*\n * PUBLIC STATE CHANGING\n */\n\n function redeem(uint256 kTokenAmount)\n external\n returns (bool);\n\n function redeemUnderlying(uint256 tokenAmount)\n external\n returns (bool);\n\n function mintInternal(uint256 amount)\n internal\n returns (bool);\n\n function redeemInternal(uint256 tokenAmount, uint256 kTokenAmount)\n internal\n returns (bool);\n\n /*\n * INVOKER STATE-CHANGING HOOKS\n */\n\n function transferUnderlying(address to, uint256 amount)\n external\n returns (bool);\n\n function transferUnderlyingInternal(address to, uint256 amount) internal returns (bool);\n\n /* Lock automatically clears after block in case of any unintended locking attacks */\n function lock()\n external;\n\n function unlock()\n external;\n\n /* Adds unlimited allowance functionality to standard transferFrom implementation */\n function transferFrom(address sender, address recipient, uint256 amount) public returns (bool);\n\n /*\n * VIEWS\n */\n\n function tokenAmountToKTokenAmount(uint256 tokenAmount, bool ceiling) public view returns (uint256);\n\n function tokenAmountToKTokenAmountInternal(uint256 tokenAmount, bool ceiling, bool alreadyDeposited)\n internal\n view\n returns (uint256);\n\n function kTokenAmountToTokenAmount(uint256 kTokenAmount) public view returns (uint256);\n\n function isKEther() public view returns (bool);\n\n function totalReserve() public view returns (uint256);\n\n function balanceOfUnderlying(address owner) public view returns (uint256);\n\n function tokenAddress() external view returns (address);\n\n function invokerAddress() external view returns (address);\n\n /*\n * ADMIN FUNCTIONS\n */\n\n /* KToken ownership will be relinquished before public launch. */\n 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