//! Causeway off-chain helpers for Zcash transparent assets.
//!
//! - [`address`] — t-address derivation (Causeway tweak + hash160 +
//! Base58Check)
//! - [`tx`] — build an unsigned v5 transparent tx + ZIP-244 v5 sighash
//! - [`sign`] — splice DER signature + pubkey into the scriptSig