solidity | 空投合约「批量」

参考资料

发送空投

这里说一下流程

创建一个 ERC20 合约
创建一个空投合约
在 ERC20 合约中赋予 approve 权限
执行空投合约的批量函数

关于 ERC20 请参考

solidity | 再次探究 ERC20
- 0xd1693560A107B2E12F32e925FDe1867EC38FA3c6

空投合约如下

pragma solidity ^0.8.0;

import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/utils/math/SafeMath.sol";

pragma solidity ^0.8.0;

contract airdrop {

    using SafeMath for uint256;

    // 数组求和函数
    function getSum(uint256[] calldata _arr) public pure returns (uint sum)
    {
        bool state;
        for (uint i = 0; i < _arr.length; i++) {
            (state, sum) = sum.tryAdd(_arr[i]);
            require(state == true, "over max");
        }
    }

    function multiTransferToken(
        address _token,
        address[] calldata _addresses,
        uint256[] calldata _amounts
    ) external {
        // 检查：_addresses和_amounts数组的长度相等
        require(_addresses.length == _amounts.length, "Lengths of Addresses and Amounts NOT EQUAL");
        IERC20 token = IERC20(_token);
        // 声明IERC合约变量
        uint _amountSum = getSum(_amounts);
        // 计算空投代币总量
        // 检查：授权代币数量 >= 空投代币总量
        require(token.allowance(msg.sender, address(this)) >= _amountSum, "Need Approve ERC20 token");

        // for循环，利用transferFrom函数发送空投
        for (uint8 i; i < _addresses.length; i++) {
            token.transferFrom(msg.sender, _addresses[i], _amounts[i]);
        }
    }

    /// 向多个地址转账ETH
    function multiTransferETH(
        address payable[] calldata _addresses,
        uint256[] calldata _amounts
    ) public payable {
        // 检查：_addresses和_amounts数组的长度相等
        require(_addresses.length == _amounts.length, "Lengths of Addresses and Amounts NOT EQUAL");
        uint _amountSum = getSum(_amounts);
        // 计算空投ETH总量
        // 检查转入ETH等于空投总量
        require(msg.value == _amountSum, "Transfer amount error");
        // for循环，利用transfer函数发送ETH
        for (uint256 i = 0; i < _addresses.length; i++) {
            _addresses[i].transfer(_amounts[i]);
        }
    }

}

部署在 bsc 测试网 0x2062359C43E6B14E0E752a13034df1c21a514Adb

借用

solidity | 再次探究 ERC20

过程

地址 A mint 10000 个币
地址 A 赋予空投合约地址关于这个币的权限
地址 A 调用空投地址，批量转移 10000 个币

from web3 import Web3

abi_erc20 = """[{"inputs":[{"internalType":"string","name":"name_","type":"string"},{"internalType":"string","name":"symbol_","type":"string"}],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[{"internalType":"address","name":"sender","type":"address"},{"internalType":"string","name":"msg","type":"string"}],"name":"mathError","type":"error"},{"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"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"approve","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"burn","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"mint","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transfer","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"from","type":"address"},{"indexed":true,"internalType":"address","name":"to","type":"address"},{"indexed":false,"internalType":"uint256","name":"value","type":"uint256"}],"name":"Transfer","type":"event"},{"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"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"},{"internalType":"address","name":"","type":"address"}],"name":"allowance","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"balanceOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"decimals","outputs":[{"internalType":"uint8","name":"","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"}]"""

abi_aridrop = """[{"inputs":[{"internalType":"addresspayable[]","name":"_addresses","type":"address[]"},{"internalType":"uint256[]","name":"_amounts","type":"uint256[]"}],"name":"multiTransferETH","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"address","name":"_token","type":"address"},{"internalType":"address[]","name":"_addresses","type":"address[]"},{"internalType":"uint256[]","name":"_amounts","type":"uint256[]"}],"name":"multiTransferToken","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256[]","name":"_arr","type":"uint256[]"}],"name":"getSum","outputs":[{"internalType":"uint256","name":"sum","type":"uint256"}],"stateMutability":"pure","type":"function"}]"""
w3 = Web3(Web3.HTTPProvider("https://bsc.getblock.io/testnet/?api_key=5deb2***"))

address = "0xD1B260aba3bA6f3D3099725b1b1C7cdD12581974"
contract_erc20 = "0xd1693560A107B2E12F32e925FDe1867EC38FA3c6"
contract_airdrop = "0x2062359C43E6B14E0E752a13034df1c21a514Adb"
private = ""

contract_erc20_ = w3.eth.contract(
    address=Web3.toChecksumAddress(contract_erc20), abi=abi_erc20)
contract_airdrop_ = w3.eth.contract(
    address=Web3.toChecksumAddress(contract_airdrop), abi=abi_aridrop)


def encode_mint():
    tx_dic = contract_erc20_.functions.mint(10000). \
        buildTransaction(
        {
            'gas': 500000,
        }
    )
    return tx_dic


def encode_approve():
    tx_dic = contract_erc20_.functions.approve(Web3.toChecksumAddress("0x2062359C43E6B14E0E752a13034df1c21a514Adb"), 10000). \
        buildTransaction(
        {
            'gas': 500000,
        }
    )
    return tx_dic


def encode_airdrop():
    tx_dic = contract_airdrop_.functions.multiTransferToken(
        Web3.toChecksumAddress("0xd1693560A107B2E12F32e925FDe1867EC38FA3c6"),
        [
            Web3.toChecksumAddress("0x177C713E09cA2C5B703C05E40F3846dD77108f94"),
            Web3.toChecksumAddress("0x85D8b13f2D8B80AA4d8a58F7Bcb9AaAC562A67E8")
        ],
        [200, 500]
    ). \
        buildTransaction(
        {
            'gas': 500000,
        }
    )
    return tx_dic


def send_transaction(tx_dic):
    nonce = w3.eth.getTransactionCount(address)
    tx_dic["nonce"] = nonce
    tx_dic['gasPrice'] = w3.eth.gasPrice
    sign_tx = w3.eth.account.signTransaction(tx_dic, private_key=private)
    txn_hash = w3.eth.sendRawTransaction(sign_tx.rawTransaction)
    print(Web3.toHex(txn_hash))
    return Web3.toHex(txn_hash)


def get_wait_receipt(tx):
    data = w3.eth.waitForTransactionReceipt(tx)
    return data


if __name__ == '__main__':
    print(get_wait_receipt(send_transaction(encode_mint())))
    print(get_wait_receipt(send_transaction(encode_approve())))
    print(get_wait_receipt(send_transaction(encode_airdrop())))