Run Rhea example

Rhea enables fair sequencing of rollup transactions. Rhea transaction encapsulates a single Ethereum-like rollup transaction within a Solana transaction.

Run Rhea example using

cargo run --example rhea

Ensure the from address (0xae600d1f94680ef43ab12f8d618f8aafc208fe25) has sufficient funds, otherwise airdrop to from address.

Methods used

We explain the methods used in rome-sdk/examples/rhea.rs below.

Main methods

The Rome struct will be used to compose transactions. Initialize it with your configuration:

let config = RomeConfig::load_json(common::CONFIG_PATH.parse()?).await?;
let rome = Rome::new_with_config(config).await?;

Create a RheaTx transaction and then compose it using the Rome transaction structure:

let rhea_tx = RheaTx::new(tx);
let mut rome_tx = rome.compose_rollup_tx(rhea_tx).await?;

Send the transaction to the Solana network:

let signature = rome.send_and_confirm(&mut *rome_tx).await?;

Helper methods

To enable tracing and logging for easier debugging, initialize a tracing subscriber using

tracing_subscriber::fmt::init();

Log relevant information using

tracing::info!("Signature: {:?}", signature);
tracing::info!(
    "https://explorer.solana.com/tx/{}?cluster={}",
    signature,
    rpc_url
);

Create Ethereum wallet using

let wallet = common::create_wallet();

Construct a transfer transaction using

let tx: EthSignedTxTuple = common::construct_transfer_tx(&rome, &wallet, CHAIN_ID).await?;

The steps involved in transaction construction are:

• Retrieve to and from addresses

• Obtain the nonce

• Create a transaction request (using ethers library)

• Estimate gas fees

• Sign the transaction

Example Results

cargo run --example rhea

INFO rhea: https://explorer.solana.com/tx/4uRtgGK7DkZcyrdjJZHdstneg5JTSUC9ZV1Pm11HVmcvXC756grP2g8PxrFUE1ZLvXNyV6T869SHqBbFtn6o39NV?cluster=devnet

Solana Transaction

The Solana block explorer shows the Solana transaction below (link here). Instruction 3 logs show balance transfer from wallet ae600d1f94680ef43ab12f8d618f8aafc208fe25 to wallet b94f5374fce5edbc8e2a8697c15331677e6ebf0b for chain 200004.

Rollup Transaction

The Rollup block explorer shows this rollup transaction for chain 200004 from wallet ae600d1f94680ef43ab12f8d618f8aafc208fe25 to b94f5374fce5edbc8e2a8697c15331677e6ebf0b.