@ethsub/sol-cli/cmd/utils.js

A cli to interact with ethereum

const ethers = require("ethers");
const fs = require("fs");

const setupParentArgs = async (args, parent) => {
  args.url = parent.url;
  if (!parent.networkId) {
    args.provider = new ethers.providers.JsonRpcProvider(args.url);
  } else {
    args.provider = new ethers.providers.JsonRpcProvider(args.url, {
      name: "custom",
      chainId: Number(parent.networkId),
    });
  }
  args.gasLimit = ethers.utils.hexlify(ethers.BigNumber.from(parent.gasLimit));
  args.gasPrice = ethers.utils.hexlify(ethers.BigNumber.from(parent.gasPrice));
  if (!parent.jsonWallet) {
    args.wallet = new ethers.Wallet(parent.privateKey, args.provider);
  } else {
    const raw = fs.readFileSync(parent.jsonWallet);
    const keyfile = JSON.parse(raw);
    args.wallet = await ethers.Wallet.fromEncryptedJson(
      keyfile,
      parent.jsonWalletPassword
    );
  }
};

const splitCommaList = (str) => {
  return str.split(",");
};

const getFunctionBytes = (sig) => {
  return ethers.utils
    .keccak256(ethers.utils.hexlify(ethers.utils.toUtf8Bytes(sig)))
    .substr(0, 10);
};

function sleep(ms) {
  return new Promise((resolve) => setTimeout(resolve, ms));
}

const waitForTx = async (provider, hash) => {
  console.log(`Waiting for tx: ${hash}...`);
  while (!(await provider.getTransactionReceipt(hash))) {
    sleep(5000);
  }
};

const expandDecimals = (amount, decimals = 18) => {
  return ethers.utils.parseUnits(String(amount), decimals);
};

const isValidAddress = (address) => {
  try {
    ethers.utils.getAddress(address);
  } catch (e) {
    console.log(`${address} is not a valid address: ` + e);
    return false;
  }
  return true;
};

const log = (args, msg) =>
  console.log(`[${args.parent._name}/${args._name}] ${msg}`);

module.exports = {
  setupParentArgs,
  splitCommaList,
  getFunctionBytes,
  waitForTx,
  log,
  expandDecimals,
  isValidAddress,
};