Shapeshift Bot

A simple Ethereum contract to transfer Ether to Bitcoin, via Ether transactions or from within other contracts.

It is using Shapeshift.io for the actual exchange and Oraclize.it for the HTTP communication from within Ethereum.

Usage

It is really simple to use within a contract:

import "shapeshiftbot.api.sol"
contract Hello is usingShapeshift {
  function Hello() {
  }

  function test(uint value, string bitcoinAddress) {
    shapeshiftTransfer(value, "btc", bitcoinAddress);
  }
}

In order to make this work, you need to put shapeshiftbot.api.sol in the same directory as your contract. The other Solidity sources are not needed from this project.

I will periodically publish a new contract based on the changes in this repository and update the lookup contract. Please make a pull request instead of publishing a lot of copies of this contract on Ethereum.

Solo mode

Solo mode is about creating your own proxy contract for Bitcoin conversion. This contract will try to convert Ethers every time a simple transaction is made. Just send Ethers via any wallet app or via other contracts.

In order to use:

1. Deploy the ShapeshiftBotSolo contract (shapeshiftbot.solo.sol). Make sure to supply a Bitcoin address as a parameter when deploying.
2. Transfer Ethers to the contract.

If the ethers transferred are below a threshold, they will be sent at any future occasion when the threshold is exceeded.

Note: right now processing happens when a transaction is made, that means the gas costs are expensed there. Probably it will make more sense to just accept incoming transactions and not send them until the owner specifically requests it.

Technical

There are three Solidity source files in this repo:

• shapeshiftbot.sol: the actual source code of the shapeshift contract (bot)
• shapeshiftbot.lookup.sol: the contract doing the lookup service
• shapeshiftbot.api.sol: the API interface bit to be included by contracts using this bot

Deployed contracts

The bot contract currently is currently available at address 0x...

There is also a lookup contract running at 0x... with only one method (getAddress) to retrieve the current address of the bot.

Both are the version tagged as r1 in this repo.

Plans or todo

See the github issue tracker for a complete list.

Support storing a public record of transactions

Optionally the sender should be able to keep a record of the transaction:

• value in ethers
• sender Ethereum address
• recipient Bitcoin address

License

Copyright (C) 2015 Alex Beregszaszi

Permission is hereby granted, free of charge, to any person obtaining a copy of
this software and associated documentation files (the "Software"), to deal in
the Software without restriction, including without limitation the rights to
use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
the Software, and to permit persons to whom the Software is furnished to do so,
subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.