Run Romulus Example

Romulus transactions involve multiple Ethereum-like rollup transactions and Solana transactions bundled within a single Solana transaction. This structure allows for cross-chain atomic transactions.

Run Romulus example using:

cargo run --example romulus

Methods Used

We explain the methods used in rome-sdk/examples/romulus.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 Romulus transaction and then compose it using the Rome transaction structure. Specify the Ethereum rollup transactions, Solana instructions, and signers needed for the Solana instructions:

let romulus_tx = RomulusTx::new(eth_txs, sol_ixs);
let mut rome_tx = rome.compose_cross_chain_tx(romulus_tx, signers).await?;

Send the transaction to the Solana network:

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

Helper Methods

Create Solana wallet using:

let sender = common::create_solana_payer();

Create Solana transfer instruction using

let sol_ixs = vec![common::construct_solana_transfer_ix(&sender)];

Create Solana transaction signers using

let signers = vec![Arc::new(sender)];

Example Results

cargo run --example romulus

INFO romulus: https://explorer.solana.com/tx/3EXFLyJ2ELQyR3Pax5F2JpRYtL4emSArfY5uco2kGuzaVB6zrB8ZrH6TWPrmyukjmUveBbM8RmY48Jm6t8HSJArp?cluster=devnet

Solana Transaction

The Solana block explorer shows the Solana transaction below (link here). This transaction contains three relevant instructions all executed atomically within this single Solana transaction.

• Instruction 3 logs show transfer from wallet ae600d1f94680ef43ab12f8d618f8aafc208fe25 to wallet b94f5374fce5edbc8e2a8697c15331677e6ebf0b for chain 200003.

• Instruction 4 logs show transfer from wallet ae600d1f94680ef43ab12f8d618f8aafc208fe25 to wallet b94f5374fce5edbc8e2a8697c15331677e6ebf0b for chain 200004.

• Instruction 5 shows SOL transfer from one Solana wallet to another.

Rollup Transactions

The Rollup block explorers show these rollup transactions for chains 200003 and 200004 from wallet ae600d1f94680ef43ab12f8d618f8aafc208fe25 to b94f5374fce5edbc8e2a8697c15331677e6ebf0b.