IOST ICO Example

ico.js

const TOKEN = 'TIX';
const IOST_COST = '.1';
const TOKEN_DECIMALS = 8;

class ICO {
  init() {
    // Runs on deploy.
  }

  // Remove to disable updates.
  can_update(data) {
    return blockchain.requireAuth(blockchain.contractOwner(), 'active');
  }

  buy(amount, buyFor) {
    const depositArgs = [
      'iost',
      tx.publisher, // Who's paying?
      blockchain.contractName(), // Where to transfer?
      new Float64(amount).multi(IOST_COST), // IOST amount.
      `IOST exchanged for ${TOKEN}!`,
    ];

    blockchain.call('token.iost', 'transfer', depositArgs);

    const transferArgs = [
      TOKEN.toLowerCase(),
      blockchain.contractName(),
      buyFor,
      amount.toFixed(TOKEN_DECIMALS).toString(),
      'Thanks for trading!',
    ];

    blockchain.callWithAuth('token.iost', 'transfer', transferArgs);
  }
}

module.exports = ICO;

ico.js.abi

{
  "lang": "javascript",
  "version": "1.0.0",
  "abi": [
    {
      "name": "buy",
      "args": [
        "number",
        "string"
      ],
      "amountLimit": [
        {
          "token": "iost",
          "val": "10000"
        },
        {
          "token": "ram",
          "val": "1000"
        }
      ]
    },
    {
      "name": "can_update",
      "args": [
        "string"
      ],
      "amountLimit": [
        {
          "token": "ram",
          "val": "1000"
        }
      ]
    }
  ]
}