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• BNB Smart Chain
  1
  Topics
  1
  Posts

  W

  https://directroute.nodereal.io/

  https://docs.bnb48.club/buidl/infrastructure/bsc-validator/enhanced-rpc/puissant-api

• Ethers
  2
  Topics
  2
  Posts

  W

  I am using ganache-cli with mainnet fork, but I use Hardhat with Ethers library to deploy the contract.

  Here is an example:

  Contract Code (HelloWorld.sol):

  // SPDX-License-Identifier: MIT pragma solidity <=0.8.10; contract HelloWorld { string saySomething; constructor() { saySomething = "Hello World!"; } function speak() public view returns(string memory) { return saySomething; } }

  Deployment Code:

  const { ethers } = require("hardhat"); const config = require("../config.json") const fs = require('fs'); async function main() { const [deployer] = await ethers.getSigners(); console.log( "Deploying contracts with the account:", deployer.address ); console.log("Account balance:", (await deployer.getBalance()).toString()); const HelloWorld = await ethers.getContractFactory("HelloWorld"); const contract = await HelloWorld.deploy(); console.log("Contract deployed at:", contract.address); } main() .then(() => process.exit(0)) .catch(error => { console.error(error); process.exit(1); });

  Deployment Output:

  npx hardhat --network ganache run scripts/deployHelloWorld.js Deploying contracts with the account: 0x3244e66158295043AF04548925EbaE25cCC73c8F Account balance: 1000000000000000000000 ProviderError: HttpProviderError at HttpProvider.request (/Users/dapp/node_modules/hardhat/src/internal/core/providers/http.ts:78:19) at LocalAccountsProvider.request (/Users/dapp/node_modules/hardhat/src/internal/core/providers/accounts.ts:181:36) at processTicksAndRejections (node:internal/process/task_queues:96:5) at EthersProviderWrapper.send (/Users/dapp/node_modules/@nomiclabs/hardhat-ethers/src/internal/ethers-provider-wrapper.ts:13:20)

  adding:

  try { const contract = await HelloWorld.deploy(); } catch (e) { console.log(e.message); throw e; }

  It gives more info:

  npx hardhat --network ganache run scripts/deployHelloWorld.js Deploying contracts with the account: 0x3244e66158295043AF04548925EbaE25cCC73c8F Account balance: 1000000000000000000000 VM Exception while processing transaction: Transaction's maxFeePerGas (2000000000) is less than the block's baseFeePerGas (7978231074) (vm hf=london -> block -> tx) Solution

  add gasPrice: 50000000000
  to hardhat.config.js

  networks: { ganache: { gasPrice: 50000000000, url: "http://127.0.0.1:7545", accounts: [privateKey] } }
• Solidity
  2
  Topics
  2
  Posts

  W

  https://medium.com/@maxime.atton/fork-uniswap-v2-smart-contracts-ui-on-remix-e885d6cea176

• Web3JS
  3
  Topics
  3
  Posts

  W

  Json RPC server needs to have eth_getLogs enabled

  const ethers = require("ethers"); const abi = [{"constant":true,"inputs":[],"name":"name","outputs":[{"name":"","type":"string"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"_spender","type":"address"},{"name":"_value","type":"uint256"}],"name":"approve","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"totalSupply","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"_from","type":"address"},{"name":"_to","type":"address"},{"name":"_value","type":"uint256"}],"name":"transferFrom","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"decimals","outputs":[{"name":"","type":"uint8"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"_to","type":"address"},{"name":"_value","type":"uint256"},{"name":"_data","type":"bytes"}],"name":"transferAndCall","outputs":[{"name":"success","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"_spender","type":"address"},{"name":"_subtractedValue","type":"uint256"}],"name":"decreaseApproval","outputs":[{"name":"success","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"name":"_owner","type":"address"}],"name":"balanceOf","outputs":[{"name":"balance","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"symbol","outputs":[{"name":"","type":"string"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"_to","type":"address"},{"name":"_value","type":"uint256"}],"name":"transfer","outputs":[{"name":"success","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"_spender","type":"address"},{"name":"_addedValue","type":"uint256"}],"name":"increaseApproval","outputs":[{"name":"success","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"name":"_owner","type":"address"},{"name":"_spender","type":"address"}],"name":"allowance","outputs":[{"name":"remaining","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"inputs":[],"payable":false,"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"name":"from","type":"address"},{"indexed":true,"name":"to","type":"address"},{"indexed":false,"name":"value","type":"uint256"},{"indexed":false,"name":"data","type":"bytes"}],"name":"Transfer","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"owner","type":"address"},{"indexed":true,"name":"spender","type":"address"},{"indexed":false,"name":"value","type":"uint256"}],"name":"Approval","type":"event"}] async function main() { const tokenAddress = "0xce3f1c9f2fd7e8edcc38ab0414fbc7292e7d372f"; const provider = new ethers.providers.JsonRpcProvider("https://bsc-mainnet.nodereal.io/v1/64a9df0874fb4a93b9d0a3849de012d3", { name: "binance", chainId: 56, }) const contract = new ethers.Contract(tokenAddress, abi, provider); contract.on("Transfer", (from, to, value, event) => { let info = { from: from, to: to, value: ethers.utils.formatUnits(value, 6), data: event, }; console.log(JSON.stringify(info, null, 4)); }); } main();