Module encoding 

Shared address-encoding primitives used by multiple chain crates.

• hash160 — Bitcoin / Cosmos / XRPL account-id style digests
• double_sha256 — Bitcoin-style checksums
• base58check_encode — Bitcoin alphabet + 4-byte double-SHA-256 checksum

Chain crates keep HRP, alphabet variants (XRPL), and script templates locally; only the repeated hash / Base58Check steps live here.

Functions

base58check_encode

Bitcoin-alphabet Base58Check: Base58(payload ‖ checksum4).

base58check_versioned

Convenience: version byte + 20-byte payload (P2PKH / P2SH style).

double_sha256

SHA-256(SHA-256(data)) → 32 bytes.

hash160

RIPEMD-160(SHA-256(data)) → 20 bytes.