以太坊开发中以太坊开发中ethers库的使用库的使用
eip-155定义的定义的eth 的的chainID
CHAIN_ID Chain(s)
1 Ethereum mainnet
2
Morden (disused), Expanse
mainnet
3 Ropsten
4 Rinkeby
5 Goerli
42 Kovan
1337 Geth private chains (default)
ethers.utils.HDNode.isValidMnemonic(): 验证助记词是否有效
ethers.utils.getAddress():转换为checkSum地址
1. send方法后面可写入方法后面可写入rpc调用方法名调用方法名(eth标准方法标准方法),后面跟参数,后面跟参数
personal_importRawKey
let lockStatus = await rpcProvider.send(“personal_lockAccount”, address)
2.查询查询token余额余额
const getBalance_USDT = async () => {
const contract = new ethers.Contract(USDTaddress, USDTabi, rpcProvider);
const balance = await contract.balanceOf(address);
return balance.toString();
};
//6为token有效小数位。查到的余额除以有效小数位才是实际余额
let actuBalUSDT = ethers.utils.formatUnits(queryBalUSDT, 6)
3.查询查询eth余额余额
let pendingBal = await rpcProvider.getBalance(address, "pending")
查询不同状态的余额”latest”(已经确认了的), “earliest”(创世区块的) , “pending”(包含未确认的交易的余额)
4.utils
//去除地址前面的0位
let address = ethers.utils.hexStripZeros(addressQuery)
// 相当于从wei到ether
let numberOfDecimals = 18;
let BNBbal = ethers.utils.parseUnits(queryBalBNB, numberOfDecimals);
5.发送发送eth交易交易
let wallet = new ethers.Wallet(privateKey, provider);
let amount = ethers.utils.parseEther(amount);
//let nonce = await rpcProvider.getTransactionCount(address, "pending")
let nonce = await wallet.getTransactionCount();
let gasPrice=await provider.getGasPrice();
let tx = {
nonce: nonce,
gasLimit: 21000,
gasPrice: ethers.utils.bigNumberify(gasPrice),
to: toAddress,
chainId: chainId,
value: amount,
data: ""
};
// let signTx = await wallet.sign(tx)
// let resp = await rpcProvider.sendTransaction(signTx)
或
let resp = await wallet.sendTransaction(tx);
6.发送发送token交易交易
let numberOfTokens = ethers.utils.parseUnits(amount, decims);
// 先计算transfer 需要的gas 消耗量,这一步有默认值,非必须。
let gas = await contract.estimate.transfer(toAddress, numberOfTokens)
let gasP = await rpcProvider.getGasPrice()
// 必须关联一个有过签名钱包对象
let contractWithSigner = contract.connect(wallet);
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