Class Provider

utils/provider.js:3–134

const Ethers = require("ethers");

class Provider {
  constructor(props = {}) {
    this.props = props;
    this.chain = props.chain;
    this.chainId = props.chainId;
    this.fullnode = props.fullnode;
    this.provider = new Ethers.providers.JsonRpcProvider(this.fullnode, this.chainId);
  }

  getProvider() {
    return this.provider;
  }

  async getBlockNumber() {
    return await this.provider.getBlockNumber();
  }

  async getBlock(blockNumber) {
    // const block     = await this.provider.getBlock(blockNumber);
    const block = await this.provider.send("eth_getBlockByNumber", [Decimal.toHex(blockNumber), false]);

    return {
      hash: block.hash,
      parentHash: block.parentHash,
      number: lodash.toInteger(Decimal.fromHex(block.number)),
      timestamp: lodash.toInteger(Decimal.fromHex(block.timestamp)),
      nonce: block.nonce,
      difficulty: lodash.toInteger(Decimal.fromHex(block.difficulty)),
      gasLimit: Decimal.fromHex(block.gasLimit), //
      gasUsed: Decimal.fromHex(block.gasUsed), //
      miner: block.miner,
      extraData: block.extraData,
      transactions: block.transactions,
      logsBloom: block.logsBloom,
      baseFeePerGas: lodash.isUndefined(block.baseFeePerGas) ? null : Decimal.fromHex(block.baseFeePerGas), //
    };
  }

  async getChainBalance(address, blockTag = "latest") {
    return await this.provider.getBalance(address, blockTag);
  }

  async getTokenBalance(address, contract, blockTag = "latest") {
    const balanceOfAbi = [{
      "inputs": [{
        "internalType": "address",
        "name": "account",
        "type": "address",
      }, ],
      "name": "balanceOf",
      "outputs": [{
        "internalType": "uint256",
        "name": "",
        "type": "uint256",
      }, ],
      "stateMutability": "view",
      "type": "function",
    }];