Build Solana Transactions

Builds Solana transactions to be signed externally.

To run, install node packages and run the start script.

The script takes three parameters:

# Run script with warnings suppressed
npm run --silent start "$from" "$to" "$amount" 2>/dev/null

A shell script request-signature.sh is provided which:

• Runs the typescript programme to generate the unsigned (devnet) transaction
• Submits the transaction for signing to zrchain

If the Solana-enabled relayer is running, the fulfilled transaction request will be picked up and broadcast to L1.

For debugging, set broadcast=0 in request-signature.sh - this will print the script output without broadcasting.