[区块链]以太坊智能合约ABI格式

Ethereum 智能合约 ABI

Ethereum 智能合约 ABI 用一个 array 表示，其中会包含数个用 JSON 格式表示的 Function 或 Event。根据最新的 Solidity 文件：

Function

共有 7 个参数：

1. name：a string，function 名称

2. type：a string，"function", "constructor", or "fallback"

3. inputs：an array，function 输入的参数，包含：

   • name：a string，参数名

   • type：a string，参数的 data type(e.g. uint256)

   • components：an array，如果输入的参数是 tuple(struct) type 才会有这个参数。描述 struct 中包含的参数类型

4. outputs：an array，function 的返回值，和?inputs?使用相同表示方式。如果沒有返回值可忽略，值为?[]

5. payable：true，function 是否可收 Ether，预设为?false

6. constant：true，function 是否会改写区块链状态，反之为?false

7. stateMutability：a string，其值可能为以下其中之一："pure"（不会读写区块链状态）、"view"（只读不写区块链状态）、"payable" and "nonpayable"（会改区块链状态，且如可收 Ether 为 "payable"，反之为 "nonpayable"）

仔细看会发现?payable?和?constant?这两个参数所描述的內容，似乎已包含在?stateMutability?中。

从哪里取到ABI? 在remix 界面

举例：kovan 测试链智能合约地址：0x175929c19c582Ecb3a3d425751afB872124b2394

[
	{
		"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": "sender",
				"type": "address"
			},
			{
				"name": "recipient",
				"type": "address"
			},
			{
				"name": "amount",
				"type": "uint256"
			}
		],
		"name": "transferFrom",
		"outputs": [
			{
				"name": "",
				"type": "bool"
			}
		],
		"payable": false,
		"stateMutability": "nonpayable",
		"type": "function"
	},
	{
		"constant": false,
		"inputs": [
			{
				"name": "spender",
				"type": "address"
			},
			{
				"name": "addedValue",
				"type": "uint256"
			}
		],
		"name": "increaseAllowance",
		"outputs": [
			{
				"name": "",
				"type": "bool"
			}
		],
		"payable": false,
		"stateMutability": "nonpayable",
		"type": "function"
	},
	{
		"constant": true,
		"inputs": [
			{
				"name": "account",
				"type": "address"
			}
		],
		"name": "balanceOf",
		"outputs": [
			{
				"name": "",
				"type": "uint256"
			}
		],
		"payable": false,
		"stateMutability": "view",
		"type": "function"
	},
	{
		"constant": false,
		"inputs": [
			{
				"name": "spender",
				"type": "address"
			},
			{
				"name": "subtractedValue",
				"type": "uint256"
			}
		],
		"name": "decreaseAllowance",
		"outputs": [
			{
				"name": "",
				"type": "bool"
			}
		],
		"payable": false,
		"stateMutability": "nonpayable",
		"type": "function"
	},
	{
		"constant": false,
		"inputs": [
			{
				"name": "recipient",
				"type": "address"
			},
			{
				"name": "amount",
				"type": "uint256"
			}
		],
		"name": "transfer",
		"outputs": [
			{
				"name": "",
				"type": "bool"
			}
		],
		"payable": false,
		"stateMutability": "nonpayable",
		"type": "function"
	},
	{
		"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": "from",
				"type": "address"
			},
			{
				"indexed": true,
				"name": "to",
				"type": "address"
			},
			{
				"indexed": false,
				"name": "value",
				"type": "uint256"
			}
		],
		"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"
	}
]