Source chain name (e.g., "ethereum", "arbitrum")
Destination chain name
Amount to bridge in token units (6 decimals for USDT0)
Recipient address on destination chain
OptionalslippageSlippage tolerance as percentage (e.g., 0.5 for 0.5%)
OptionaldstCustom gas limit for the destination chain execution
OptionalrefundRefund address for excess fees (defaults to sender)
Parameters for executing a bridge transaction