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60
...tPrecompileSendToBankThenERC20Transfer.sol/TestPrecompileSendToBankThenERC20Transfer.json
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,60 @@ | ||
| { | ||
| "_format": "hh-sol-artifact-1", | ||
| "contractName": "TestPrecompileSendToBankThenERC20Transfer", | ||
| "sourceName": "contracts/TestPrecompileSendToBankThenERC20Transfer.sol", | ||
| "abi": [ | ||
| { | ||
| "inputs": [ | ||
| { | ||
| "internalType": "address", | ||
| "name": "_erc20", | ||
| "type": "address" | ||
| }, | ||
| { | ||
| "internalType": "string", | ||
| "name": "_recipient", | ||
| "type": "string" | ||
| } | ||
| ], | ||
| "stateMutability": "nonpayable", | ||
| "type": "constructor" | ||
| }, | ||
| { | ||
| "inputs": [], | ||
| "name": "attack", | ||
| "outputs": [], | ||
| "stateMutability": "nonpayable", | ||
| "type": "function" | ||
| }, | ||
| { | ||
| "inputs": [], | ||
| "name": "erc20", | ||
| "outputs": [ | ||
| { | ||
| "internalType": "contract IERC20", | ||
| "name": "", | ||
| "type": "address" | ||
| } | ||
| ], | ||
| "stateMutability": "view", | ||
| "type": "function" | ||
| }, | ||
| { | ||
| "inputs": [], | ||
| "name": "recipient", | ||
| "outputs": [ | ||
| { | ||
| "internalType": "string", | ||
| "name": "", | ||
| "type": "string" | ||
| } | ||
| ], | ||
| "stateMutability": "view", | ||
| "type": "function" | ||
| } | ||
| ], | ||
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| "linkReferences": {}, | ||
| "deployedLinkReferences": {} | ||
| } |
25 changes: 25 additions & 0 deletions
25
x/evm/embeds/contracts/TestPrecompileSendToBankThenERC20Transfer.sol
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,25 @@ | ||
| // SPDX-License-Identifier: MIT | ||
| pragma solidity ^0.8.24; | ||
|
|
||
| import {IERC20} from "@openzeppelin/contracts/token/ERC20/ERC20.sol"; | ||
| import "./IFunToken.sol"; | ||
|
|
||
| contract TestPrecompileSendToBankThenERC20Transfer { | ||
| IERC20 public erc20; | ||
| string public recipient; | ||
|
|
||
| constructor(address _erc20, string memory _recipient) { | ||
| erc20 = IERC20(_erc20); | ||
| recipient = _recipient; | ||
| } | ||
|
|
||
| function attack() public { | ||
| // transfer this contract's entire balance to the recipient | ||
| uint balance = erc20.balanceOf(address(this)); | ||
| // sendToBank should reduce balance to zero | ||
| FUNTOKEN_PRECOMPILE.sendToBank(address(erc20), balance, recipient); | ||
|
|
||
| // this call should fail because of the balance is zero | ||
| erc20.transfer(0x000000000000000000000000000000000000dEaD, 1); | ||
| } | ||
| } |
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