Ethane is an alternative web3 implementation with the aim of being slim and simple. It does not depend on futures or any executors. It currently supports http and websockets (both plain and TLS) and inter process communication via Unix domain sockets (Unix only). For http and websockets it also supports Http Basic and Bearer Authentication.

Currently only Eth1 is supported and not all namespaces are implemented. You can have a look here (supported RPCs) to see what is supported. Please note that the JSON spec is a bit outdated, and there is some effort to create a new one, so expect some breaking changes in the future.

This library is very raw and under heavy development. Expect to find some bugs and use at your own risk!

In order to get started, create a connection over some transport. The following examples show you how to make a request and how to subscribe to events.

Examples

Request over http

use ethane::{Connection, Http};
use ethane::rpc::eth_get_balance;
use ethane::types::Address;
# use test_helper::NodeProcess;
# let node = NodeProcess::new_http("8545");

// Start up connection
let node_endpoint = "http://127.0.0.1:8545";
let mut connection = Connection::new(Http::new(node_endpoint, None));

// Make a request
let address = Address::zero();
let balance = connection.call(eth_get_balance(address, None)).unwrap();

Starting a subscription over websocket

use ethane::{Connection, WebSocket};
use ethane::rpc::eth_subscribe_new_pending_transactions;
# use test_helper::NodeProcess;
# use ethane::rpc::{eth_send_transaction, eth_coinbase};
# use ethane::types::{TransactionRequest, Address, U256};

# let node = NodeProcess::new_ws("8546");

// Start up connection with websockets
let node_endpoint = "ws://127.0.0.1:8546";
let mut connection = Connection::new(WebSocket::new(node_endpoint, None).unwrap());

// Subscribe to pending transactions
let mut tx_subscription = connection
.subscribe(eth_subscribe_new_pending_transactions()).unwrap();
# let tx_request = TransactionRequest {
# from: connection.call(eth_coinbase()).unwrap(),
# to: Some(Address::zero()),
# value: Some(U256::zero()),
# ..Default::default()
# };
# let _tx_hash = connection.call(eth_send_transaction(tx_request));

// Get next transaction item
let tx = tx_subscription.next_item().unwrap();