bee-dashboard/src/utils/rpc.ts

import { debounce } from '@material-ui/core'
import { Contract, providers, Wallet } from 'ethers'
import { bzzContractInterface } from './bzz-contract-interface'

async function eth_getBalance(address: string, provider: providers.JsonRpcProvider): Promise<string> {
  if (!address.startsWith('0x')) {
    address = `0x${address}`
  }
  const balance = await provider.getBalance(address)

  return balance.toString()
}

async function eth_getBlockByNumber(provider: providers.JsonRpcProvider): Promise<string> {
  const blockNumber = await provider.getBlockNumber()

  return blockNumber.toString()
}

const partialERC20tokenABI = [
  {
    constant: true,
    inputs: [
      {
        name: '_owner',
        type: 'address',
      },
    ],
    name: 'balanceOf',
    outputs: [
      {
        name: 'balance',
        type: 'uint256',
      },
    ],
    payable: false,
    type: 'function',
  },
]

async function eth_getBalanceERC20(
  address: string,
  provider: providers.JsonRpcProvider,
  tokenAddress = '0xdbf3ea6f5bee45c02255b2c26a16f300502f68da',
): Promise<string> {
  if (!address.startsWith('0x')) {
    address = `0x${address}`
  }
  const contract = new Contract(tokenAddress, partialERC20tokenABI, provider)
  const balance = await contract.balanceOf(address)

  return balance.toString()
}

interface TransferResponse {
  transaction: providers.TransactionResponse
  receipt: providers.TransactionReceipt
}

export async function sendNativeTransaction(
  privateKey: string,
  to: string,
  value: string,
  jsonRpcProvider: string,
): Promise<TransferResponse> {
  const signer = await makeReadySigner(privateKey, jsonRpcProvider)
  const gasPrice = await signer.getGasPrice()
  const transaction = await signer.sendTransaction({ to, value, gasPrice })
  const receipt = await transaction.wait(1)

  return { transaction, receipt }
}

export async function sendBzzTransaction(
  privateKey: string,
  to: string,
  value: string,
  jsonRpcProvider: string,
): Promise<TransferResponse> {
  const signer = await makeReadySigner(privateKey, jsonRpcProvider)
  const gasPrice = await signer.getGasPrice()
  const bzz = new Contract('0xdBF3Ea6F5beE45c02255B2c26a16F300502F68da', bzzContractInterface, signer)
  const transaction = await bzz.transfer(to, value, { gasPrice })
  const receipt = await transaction.wait(1)

  return { transaction, receipt }
}

async function makeReadySigner(privateKey: string, jsonRpcProvider: string) {
  const provider = new providers.JsonRpcProvider(jsonRpcProvider, 100)
  await provider.ready
  const signer = new Wallet(privateKey, provider)

  return signer
}

export const Rpc = {
  sendNativeTransaction,
  sendBzzTransaction,
  _eth_getBalance: eth_getBalance,
  _eth_getBalanceERC20: eth_getBalanceERC20,
  eth_getBalance: debounce(eth_getBalance, 1_000),
  eth_getBalanceERC20: debounce(eth_getBalanceERC20, 1_000),
  eth_getBlockByNumber,
}