OptionalcontrollerOptionalfeeDefault 10_000_000 stroops — CCTP mint_and_forward is resource-heavy.
Current sequence number of the caller account, as a decimal string.
Callers fetch this from Soroban RPC (server.getAccount(caller)) before
building. Keeping it as an input (rather than fetching inside the builder)
makes builders sync-friendly, RPC-free, and deterministic for snapshot tests.
OptionaltimeoutDefault 120 seconds.
Override the controller contract address. Normally resolved from env via
getStellarLendingController(network)— override is for tests and preview/staging deployments.