script.js

let contractAddress = "0xB9E612c0A19987568b79573af8c0708979F90af1";
let abi = [
  {
    inputs: [
      {
        internalType: "string",
        name: "_note",
        type: "string",
      },
    ],
    name: "set",
    outputs: [],
    stateMutability: "nonpayable",
    type: "function",
  },
  {
    inputs: [],
    name: "get",
    outputs: [
      {
        internalType: "string",
        name: "",
        type: "string",
      },
    ],
    stateMutability: "view",
    type: "function",
  },
];

contractAddress = "0x67108595Db2367aF7E92F5CE2aEF1a4c2436aFA6";
abi = [
  {
    inputs: [],
    stateMutability: "nonpayable",
    type: "constructor",
  },
  {
    inputs: [
      {
        internalType: "uint256",
        name: "requested",
        type: "uint256",
      },
      {
        internalType: "uint256",
        name: "available",
        type: "uint256",
      },
    ],
    name: "InsufficientBalance",
    type: "error",
  },
  {
    anonymous: false,
    inputs: [
      {
        indexed: false,
        internalType: "address",
        name: "from",
        type: "address",
      },
      {
        indexed: false,
        internalType: "address",
        name: "to",
        type: "address",
      },
      {
        indexed: false,
        internalType: "uint256",
        name: "amount",
        type: "uint256",
      },
    ],
    name: "Send",
    type: "event",
  },
  {
    inputs: [
      {
        internalType: "address",
        name: "",
        type: "address",
      },
    ],
    name: "balances",
    outputs: [
      {
        internalType: "uint256",
        name: "",
        type: "uint256",
      },
    ],
    stateMutability: "view",
    type: "function",
  },
  {
    inputs: [
      {
        internalType: "address",
        name: "receiver",
        type: "address",
      },
      {
        internalType: "uint256",
        name: "amount",
        type: "uint256",
      },
    ],
    name: "mint",
    outputs: [],
    stateMutability: "nonpayable",
    type: "function",
  },
  {
    inputs: [],
    name: "minter",
    outputs: [
      {
        internalType: "address",
        name: "",
        type: "address",
      },
    ],
    stateMutability: "view",
    type: "function",
  },
  {
    inputs: [
      {
        internalType: "address",
        name: "sender",
        type: "address",
      },
      {
        internalType: "address",
        name: "receiver",
        type: "address",
      },
      {
        internalType: "uint256",
        name: "amount",
        type: "uint256",
      },
    ],
    name: "send",
    outputs: [],
    stateMutability: "nonpayable",
    type: "function",
  },
];

contractAddress = "0xA77f4b4A68107C9Bde4dc21688b9cE67C74F5CbF";
abi = [
  {
    inputs: [],
    stateMutability: "nonpayable",
    type: "constructor",
  },
  {
    inputs: [
      {
        internalType: "uint256",
        name: "requested",
        type: "uint256",
      },
      {
        internalType: "uint256",
        name: "available",
        type: "uint256",
      },
    ],
    name: "InsufficientBalance",
    type: "error",
  },
  {
    anonymous: false,
    inputs: [
      {
        indexed: false,
        internalType: "address",
        name: "from",
        type: "address",
      },
      {
        indexed: false,
        internalType: "address",
        name: "to",
        type: "address",
      },
      {
        indexed: false,
        internalType: "uint256",
        name: "amount",
        type: "uint256",
      },
    ],
    name: "Send",
    type: "event",
  },
  {
    inputs: [
      {
        internalType: "address",
        name: "",
        type: "address",
      },
    ],
    name: "balances",
    outputs: [
      {
        internalType: "uint256",
        name: "",
        type: "uint256",
      },
    ],
    stateMutability: "view",
    type: "function",
  },
  {
    inputs: [
      {
        internalType: "address",
        name: "user",
        type: "address",
      },
    ],
    name: "getBalance",
    outputs: [
      {
        internalType: "uint256",
        name: "",
        type: "uint256",
      },
    ],
    stateMutability: "view",
    type: "function",
  },
  {
    inputs: [
      {
        internalType: "uint256",
        name: "amount",
        type: "uint256",
      },
    ],
    name: "mint",
    outputs: [],
    stateMutability: "nonpayable",
    type: "function",
  },
  {
    inputs: [],
    name: "minter",
    outputs: [
      {
        internalType: "address",
        name: "",
        type: "address",
      },
    ],
    stateMutability: "view",
    type: "function",
  },
  {
    inputs: [
      {
        internalType: "address",
        name: "sender",
        type: "address",
      },
      {
        internalType: "address",
        name: "receiver",
        type: "address",
      },
      {
        internalType: "uint256",
        name: "amount",
        type: "uint256",
      },
    ],
    name: "send",
    outputs: [],
    stateMutability: "nonpayable",
    type: "function",
  },
];

const provider = new ethers.providers.Web3Provider(window.ethereum);
let signer;
let contract;

provider.send("eth_requestAccounts", []).then(() => {
  provider.listAccounts().then((accounts) => {
    signer = provider.getSigner(accounts[0]);
    contract = new ethers.Contract(contractAddress, abi, signer);
    const eventName = "Send";
    const eventFilter = contract.filters[eventName]();
    console.log(eventFilter);
    contract.on(eventFilter, (sender, receiver, amount, event) => {
      console.log(
        "Sender: ",
        sender,
        "Receiver: ",
        receiver,
        "Amount: ",
        amount
      );
    });
  });
});

async function mintCoins() {
  const amount = document.querySelector("#amount").value;
  await contract.mint(parseInt(amount));
  console.log("Credit Address: ", await signer.getAddress());
}

async function getBalance() {
  const addr = document.querySelector("#addr").value;
  console.log(addr);
  const balance = await contract.getBalance(addr);
  document.querySelector("#avail_bal").innerText = balance;
}

async function sendCoins() {
  const sendersAddress = await signer.getAddress();
  const addr = document.querySelector("#addr").value;
  const amount = document.querySelector("#amount").value;
  await contract.send(sendersAddress, addr, parseInt(amount));
  console.log("Sent successfully.", sendersAddress, addr);
}