说在前面：

请先阅读此文章：ERC20 代币 API 调用-前期准备（一）

一、查看合约对象可调用的 api 接口

在JS交互窗口中输入：

cfcContract

得到以下输出：

> cfcContract
{
  abi: [{
      constant: true,
      inputs: [],
      name: "name",
      outputs: [{...}],
      payable: false,
      stateMutability: "view",
      type: "function"
  }, {
      constant: false,
      inputs: [{...}, {...}],
      name: "approve",
      outputs: [{...}],
      payable: false,
      stateMutability: "nonpayable",
      type: "function"
  }, {
      constant: true,
      inputs: [],
      name: "totalSupply",
      outputs: [{...}],
      payable: false,
      stateMutability: "view",
      type: "function"
  }, {
      constant: false,
      inputs: [{...}, {...}, {...}],
      name: "transferFrom",
      outputs: [{...}],
      payable: false,
      stateMutability: "nonpayable",
      type: "function"
  }, {
      constant: true,
      inputs: [],
      name: "decimals",
      outputs: [{...}],
      payable: false,
      stateMutability: "view",
      type: "function"
  }, {
      constant: false,
      inputs: [{...}],
      name: "withdrawEther",
      outputs: [],
      payable: false,
      stateMutability: "nonpayable",
      type: "function"
  }, {
      constant: false,
      inputs: [{...}],
      name: "burn",
      outputs: [{...}],
      payable: false,
      stateMutability: "nonpayable",
      type: "function"
  }, {
      constant: false,
      inputs: [{...}],
      name: "unfreeze",
      outputs: [{...}],
      payable: false,
      stateMutability: "nonpayable",
      type: "function"
  }, {
      constant: true,
      inputs: [{...}],
      name: "balanceOf",
      outputs: [{...}],
      payable: false,
      stateMutability: "view",
      type: "function"
  }, {
      constant: true,
      inputs: [],
      name: "owner",
      outputs: [{...}],
      payable: false,
      stateMutability: "view",
      type: "function"
  }, {
      constant: true,
      inputs: [],
      name: "symbol",
      outputs: [{...}],
      payable: false,
      stateMutability: "view",
      type: "function"
  }, {
      constant: false,
      inputs: [{...}, {...}],
      name: "transfer",
      outputs: [],
      payable: false,
      stateMutability: "nonpayable",
      type: "function"
  }, {
      constant: true,
      inputs: [{...}],
      name: "freezeOf",
      outputs: [{...}],
      payable: false,
      stateMutability: "view",
      type: "function"
  }, {
      constant: false,
      inputs: [{...}],
      name: "freeze",
      outputs: [{...}],
      payable: false,
      stateMutability: "nonpayable",
      type: "function"
  }, {
      constant: true,
      inputs: [{...}, {...}],
      name: "allowance",
      outputs: [{...}],
      payable: false,
      stateMutability: "view",
      type: "function"
  }, {
      inputs: [{...}, {...}, {...}, {...}],
      payable: false,
      stateMutability: "nonpayable",
      type: "constructor"
  }, {
      payable: true,
      stateMutability: "payable",
      type: "fallback"
  }, {
      anonymous: false,
      inputs: [{...}, {...}, {...}],
      name: "Transfer",
      type: "event"
  }, {
      anonymous: false,
      inputs: [{...}, {...}],
      name: "Burn",
      type: "event"
  }, {
      anonymous: false,
      inputs: [{...}, {...}],
      name: "Freeze",
      type: "event"
  }, {
      anonymous: false,
      inputs: [{...}, {...}],
      name: "Unfreeze",
      type: "event"
  }],
  address: "0xd4b33b74cec5141c0c40be4a664641495c6afc7e",
  transactionHash: null,
  Burn: function(),
  Freeze: function(),
  Transfer: function(),
  Unfreeze: function(),
  allEvents: function(),
  allowance: function(),
  approve: function(),
  balanceOf: function(),
  burn: function(),
  decimals: function(),
  freeze: function(),
  freezeOf: function(),
  name: function(),
  owner: function(),
  symbol: function(),
  totalSupply: function(),
  transfer: function(),
  transferFrom: function(),
  unfreeze: function(),
  withdrawEther: function()
}
>

返回到控制台的结果就是你可以调用的各个接口。

二、简单实例如何调用接口

将智能合约中的eth代币转出：
- withdrawEther方法调用
web3.eth.defaultAccount = "0xbb438852706212284ff8E1ED6dA7F000e9ecd1A6"
personal.unlockAccount("私钥")
cfcContract.withdrawEther(75000000000000000)

代币销毁：
- burn方法调用
personal.unlockAccount("私钥")
cfcContract.burn(100000000000000000000) // 由于该cfc代币的denamic为18，所以要销毁的数量=数量*10^18

代币冻结：
- freeze方法调用
personal.unlockAccount("私钥")
cfcContract.freeze(100000000000000000000)

代币解冻：
- unfreeze方法调用
personal.unlockAccount("私钥")
cfcContract.unfreeze(100000000000000000000)

以上只使用了部分接口，其他接口都雷同。