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ERC-20 代币标准
ERC-721 代币标准
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ERC-20（以太坊意见征求 20）由 Fabian Vogelsteller 提出于 2015 年 11 月。这是一个能实现智能合约中代币的 API 标准。

它提供了多个功能。例如转账代币从一个帐户到不同的帐户，来实现获取帐户的当前余额以及网络上的可用令牌总供应量。 除此之外，它还具有其他功能，如批准代币花费到第三方帐户中。

如果智能合约实施了下列方法和事件，它可以被称为 ERC-20 代币合约， 一旦部署，将负责跟踪以太坊上创建的代币。

方法

  1. function name() public view returns (string)
  2. function symbol() public view returns (string)
  3. function decimals() public view returns (uint8)
  4. function totalSupply() public view returns (uint256)
  5. function balanceOf(address _owner) public view returns (uint256 balance)
  6. function transfer(address _to, uint256 _value) public returns (bool success)
  7. function transferFrom(address _from, address _to, uint256 _value) public returns (bool success)
  8. function approve(address _spender, uint256 _value) public returns (bool success)
  9. function allowance(address _owner, address _spender) public view returns (uint256 remaining)

事件

  1. event Transfer(address indexed _from, address indexed _to, uint256 _value)
  2. event Approval(address indexed _owner, address indexed _spender, uint256 _value)

JSON ABI

[
  {
    "constant": true,
    "inputs": [],
    "name": "name",
    "outputs": [{ "name": "", "type": "string" }],
    "payable": false,
    "stateMutability": "view",
    "type": "function"
  },
  {
    "constant": true,
    "inputs": [],
    "name": "symbol",
    "outputs": [{ "name": "", "type": "string" }],
    "payable": false,
    "stateMutability": "view",
    "type": "function"
  },
  {
    "constant": true,
    "inputs": [],
    "name": "decimals",
    "outputs": [{ "name": "", "type": "uint8" }],
    "payable": false,
    "stateMutability": "view",
    "type": "function"
  },
  {
    "constant": true,
    "inputs": [],
    "name": "totalSupply",
    "outputs": [{ "name": "", "type": "uint256" }],
    "payable": false,
    "stateMutability": "view",
    "type": "function"
  },
  {
    "constant": true,
    "inputs": [{ "name": "_owner", "type": "address" }],
    "name": "balanceOf",
    "outputs": [{ "name": "balance", "type": "uint256" }],
    "payable": false,
    "stateMutability": "view",
    "type": "function"
  },
  {
    "constant": false,
    "inputs": [
      { "name": "_to", "type": "address" },
      { "name": "_value", "type": "uint256" }
    ],
    "name": "transfer",
    "outputs": [{ "name": "", "type": "bool" }],
    "payable": false,
    "stateMutability": "nonpayable",
    "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": false,
    "inputs": [
      { "name": "_spender", "type": "address" },
      { "name": "_value", "type": "uint256" }
    ],
    "name": "approve",
    "outputs": [{ "name": "", "type": "bool" }],
    "payable": false,
    "stateMutability": "nonpayable",
    "type": "function"
  },
  {
    "anonymous": false,
    "inputs": [
      { "indexed": true, "name": "from", "type": "address" },
      { "indexed": true, "name": "to", "type": "address" },
      { "indexed": false, "name": "value", "type": "uint256" }
    ],
    "name": "Transfer",
    "type": "event"
  },
  {
    "constant": true,
    "inputs": [
      { "name": "_owner", "type": "address" },
      { "name": "_spender", "type": "address" }
    ],
    "name": "allowance",
    "outputs": [{ "name": "", "type": "uint256" }],
    "payable": false,
    "stateMutability": "view",
    "type": "function"
  },
  {
    "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"
  },
  { "payable": true, "stateMutability": "payable", "type": "fallback" }
]

示例

让我们看看如此重要的一个标准是如何使我们能够简单地检查 BSC 上的任何 ERC-20 代币合约。 我们只需要合约的应用二进制接口 (ABI) 来创造一个 ERC-20 代币界面。下面我们将使用一个简化的 ABI，使其成为一个简单易用的例子。

bswAddress: 0x965f527d9159dce6288a2219db51fc6eef120dd1

name

symbol

decimals

totalSupply

balance