Bianchetto

Bianchetto is an Ethereum Developer Framework for iOS

Warnings

• Please note that it's at a very early stage, therefore there's still a lot to be done.
• It has only been tested with TestRPC running locally.
• Executions of multiple arguments functions hasn't been properly tested and it'll probably crash.

Installation

Just drop the folllowing files and folders into your project:

• Bianchetto.swift
• RPC
• Tools

Description

Bianchetto has two main parts: the JSON RPC API interface as the defined at the JSON RPC API specification and the framework.

JSON RPC API specification

From this specification only the following methods are implemented:

• web3_clientVersion
• web3_sha3
• net_version
• net_peerCount
• net_listening
• eth_protocolVersion
• eth_syncing
• eth_coinbase
• eth_mining
• eth_hashrate
• eth_gasPrice
• eth_accounts
• eth_blockNumber
• eth_getBalance
• eth_getStorageAt
• eth_getTransactionCount
• eth_getCompilers
• eth_sendTransaction
• eth_newFilter
• eth_getLogs

The following improvements are pending and planned:

• Complete all the methods.
• For some of the implemented methods results can be formatted to be more friendly (e.g. eth_getStorageAt and eth_getTransactionCount)

Framework

The executeFunction method is intended to emulate Truffle's functionality. but it's still limited to only two ABI types: string and uint256, nevertheless still can only manage values that don't exceed 32 bytes.

The following improvements are pending and planned:

• Complete all the types in the Ethereum Contract ABI specification.
• Allow for values greater than 32 bytes.

Swift Example

function update(string newMessage) {
    message = newMessage;
}

It executes the update function with the Test String value for the newMessage argument, from the 0xdbd5cc227eab854a53108dbcee38245e1582bb80 account to the contract with the 0xddee8fbd7d0c5d119d44ac1af31a8d4d7121870a address deployed to a locally hosted testRPC.

let bianchetto = Bianchetto.init(host: "http://localhost", port: "8545")
bianchetto.executeFunction(fromAccountAddress: "0xdbd5cc227eab854a53108dbcee38245e1582bb80", toContractAddress: "0xddee8fbd7d0c5d119d44ac1af31a8d4d7121870a", name: "update", arguments: ["string":"Test String"])

Other Required Improvements

• Migrate Format class from Objective-C to Swift