WBC ‐ Waves Bitcoin Token

BokkyPooBah edited this page Mar 21, 2017 · 1 revision

Table of contents



Token Contract Information



How To Watch The Token Contract In Ethereum Wallet / Mist

In Ethereum Wallet / Mist, select the CONTRACTS tab and click WATCH CONTRACT to open the Watch contract window. Then:

  • Under CONTRACT NAME, enter WBC

  • Under CONTRACT ADDRESS, enter 0x6f4024e5549bfda253d0997adb228bfeaac9b204

  • Copy the Application Binary Interface below and paste it into the JSON INTERFACE text box

    [{"constant":true,"inputs":[],"name":"name","outputs":[{"name":"","type":"string"}],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"_spender","type":"address"},{"name":"_amount","type":"uint256"}],"name":"approve","outputs":[{"name":"success","type":"bool"}],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"totalSupply","outputs":[{"name":"totalSupply","type":"uint256"}],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"_from","type":"address"},{"name":"_to","type":"address"},{"name":"_amount","type":"uint256"}],"name":"transferFrom","outputs":[{"name":"success","type":"bool"}],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"decimals","outputs":[{"name":"","type":"uint8"}],"payable":false,"type":"function"},{"constant":true,"inputs":[{"name":"_owner","type":"address"}],"name":"balanceOf","outputs":[{"name":"balance","type":"uint256"}],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"wavesAddress","type":"string"},{"name":"amount","type":"uint256"}],"name":"moveToWaves","outputs":[],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"owner","outputs":[{"name":"","type":"address"}],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"symbol","outputs":[{"name":"","type":"string"}],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"_to","type":"address"},{"name":"_amount","type":"uint256"}],"name":"transfer","outputs":[{"name":"success","type":"bool"}],"payable":false,"type":"function"},{"constant":true,"inputs":[{"name":"_owner","type":"address"},{"name":"_spender","type":"address"}],"name":"allowance","outputs":[{"name":"remaining","type":"uint256"}],"payable":false,"type":"function"},{"anonymous":false,"inputs":[{"indexed":true,"name":"_from","type":"address"},{"indexed":false,"name":"wavesAddress","type":"string"},{"indexed":false,"name":"amount","type":"uint256"}],"name":"WavesTransfer","type":"event"},{"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"}]

  • Click OK



How To Watch The Token In Ethereum Wallet / Mist

In Ethereum Wallet / Mist, select the CONTRACTS tab and click WATCH TOKEN to open the Add token window. Then:

  • Under TOKEN CONTRACT ADDRESS, enter 0x6f4024e5549bfda253d0997adb228bfeaac9b204. The additional fields should automatically be filled in.

  • Click OK



How To Check Your Token Balance In Ethereum Wallet / Mist

Watch The Token Contract, then:

  • Click on the WBC contract
  • Click on SHOW CONTRACT INFO
  • In the READ FROM CONTRACT section and under Balance of:
  • Enter the address you want to check the token balance of
  • The token balance will be displayed in the Natural Units with 8 decimal places, e.g., 123000000 is 123000000 / 1e8 = 1.23 token units



How To Transfer Your Tokens In Ethereum Wallet / Mist

Watch The Token Contract, then:

  • Click on the WBC contract
  • Click on SHOW CONTRACT INFO
  • In the WRITE TO CONTRACT section and under Select function:
  • Select the Transfer function
  • Under to, enter the address you want to transfer the token to
  • Under value, enter the amount of tokens you want to transfer. This amount needs to be specified in the natural units with 8 decimal places, e.g., 123000000 is 123000000 / 1e8 = 1.23 token units
  • Under Execute from, select the account you want to transfer your tokens from
  • Click on Execute, then confirm your transaction



How To Move Your Tokens To The Waves Blockchain In Ethereum Wallet / Mist

Watch The Token Contract, then:

  • Click on the WBC contract
  • Click on SHOW CONTRACT INFO
  • In the WRITE TO CONTRACT section and under Select function:
  • Select the Move To Waves function
  • Under Waves address, enter the correct Waves address you want to transfer the token to
  • Under Amount, enter the amount of tokens you want to transfer. This amount needs to be specified in the natural units with 8 decimal places, e.g., 123000000 is 123000000 / 1e8 = 1.23 token units
  • Under Execute from, select the account you want to transfer your tokens from
  • Click on Execute, then confirm your transaction


The Token Contract Source Code

The verified source code can be found at 0x6f4024e5549bfda253d0997adb228bfeaac9b204 and follows:

pragma solidity ^0.4.8;

// ----------------------------------------------------------------------------------------------
// The Waves Community token smart contract - to find out more, join the Incent Slack; http://incentinvites.herokuapp.com/
// A collaboration between Incent and Bok :)
// Enjoy. (c) Incent Loyalty Pty Ltd and Bok Consulting Pty Ltd 2017. The MIT Licence.
// ----------------------------------------------------------------------------------------------

// Contract configuration
contract TokenConfig {
    string public constant symbol = "WBC";
    string public constant name = "Waves Bitcoin Token";
    uint8 public constant decimals = 8;  // 8 decimal places, the same as tokens on Wave
    uint256 _totalSupply = 2100000000000000;
}

// ERC Token Standard #20 Interface
// https://github.com/ethereum/EIPs/issues/20
contract ERC20Interface {
    // Get the total token supply
    function totalSupply() constant returns (uint256 totalSupply);

    // Get the account balance of another account with address _owner
    function balanceOf(address _owner) constant returns (uint256 balance);

    // Send _value amount of tokens to address _to
    function transfer(address _to, uint256 _value) returns (bool success);

    // Send _value amount of tokens from address _from to address _to
    function transferFrom(address _from, address _to, uint256 _value) returns (bool success);

    // Allow _spender to withdraw from your account, multiple times, up to the _value amount.
    // If this function is called again it overwrites the current allowance with _value.
    // this function is required for some DEX functionality
    function approve(address _spender, uint256 _value) returns (bool success);

    // Returns the amount which _spender is still allowed to withdraw from _owner
    function allowance(address _owner, address _spender) constant returns (uint256 remaining);

    // Triggered when tokens are transferred.
    event Transfer(address indexed _from, address indexed _to, uint256 _value);

    // Triggered whenever approve(address _spender, uint256 _value) is called.
    event Approval(address indexed _owner, address indexed _spender, uint256 _value);
}

contract WavesBitcoinToken is ERC20Interface, TokenConfig {
    // Owner of this contract
    address public owner;

    // Balances for each account
    mapping(address => uint256) balances;

    // Owner of account approves the transfer of an amount to another account
    mapping(address => mapping (address => uint256)) allowed;

    // Functions with this modifier can only be executed by the owner
    modifier onlyOwner() {
        if (msg.sender != owner) {
            throw;
        }
        _;
    }

    // Constructor
    function WavesBitcoinToken() {
        owner = msg.sender;
        balances[owner] = _totalSupply;
    }

    function totalSupply() constant returns (uint256 totalSupply) {
        totalSupply = _totalSupply;
    }

    // What is the balance of a particular account?
    function balanceOf(address _owner) constant returns (uint256 balance) {
        return balances[_owner];
    }

    // Transfer the balance from owner's account to another account
    function transfer(address _to, uint256 _amount) returns (bool success) {
        if (balances[msg.sender] >= _amount
            && _amount > 0
            && balances[_to] + _amount > balances[_to]) {
            balances[msg.sender] -= _amount;
            balances[_to] += _amount;
            Transfer(msg.sender, _to, _amount);
            return true;
        } else {
            return false;
        }
    }

    // Send _value amount of tokens from address _from to address _to
    // The transferFrom method is used for a withdraw workflow, allowing contracts to send
    // tokens on your behalf, for example to "deposit" to a contract address and/or to charge
    // fees in sub-currencies; the command should fail unless the _from account has
    // deliberately authorized the sender of the message via some mechanism; we propose
    // these standardized APIs for approval:
    function transferFrom(
        address _from,
        address _to,
        uint256 _amount
) returns (bool success) {
        if (balances[_from] >= _amount
            && allowed[_from][msg.sender] >= _amount
            && _amount > 0
            && balances[_to] + _amount > balances[_to]) {
            balances[_from] -= _amount;
            allowed[_from][msg.sender] -= _amount;
            balances[_to] += _amount;
            Transfer(_from, _to, _amount);
            return true;
        } else {
            return false;
        }
    }

    // Allow _spender to withdraw from your account, multiple times, up to the _value amount.
    // If this function is called again it overwrites the current allowance with _value.
    function approve(address _spender, uint256 _amount) returns (bool success) {
        allowed[msg.sender][_spender] = _amount;
        Approval(msg.sender, _spender, _amount);
        return true;
    }

    function allowance(address _owner, address _spender) constant returns (uint256 remaining) {
        return allowed[_owner][_spender];
    }
}

contract WavesEthereumSwap is WavesBitcoinToken {
    event WavesTransfer(address indexed _from, string wavesAddress, uint256 amount);

    function moveToWaves(string wavesAddress, uint256 amount) {
        if (!transfer(owner, amount)) throw;
        WavesTransfer(msg.sender, wavesAddress, amount);
    }
}
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