Module bch 

BIP 93 codex32 BCH primitives for HRP "md" (regular code only).

Extracted from the v0.x encoding module; v0.11 needs only the regular-code checksum + verify (long code dropped along with v0.x).

Constants

GEN_REGULAR

BCH(93,80,8) generator polynomial coefficients (5 × 65-bit).

MD_REGULAR_CONST

MD-domain target residue (NUMS-style, top 65 bits of SHA-256("shibbolethnums")).

Functions

bch_create_checksum_regular

13-symbol regular-code BCH checksum over hrp_expand(hrp) || data || [0; 13].

bch_verify_regular

Verify a regular-code BCH checksum over the data-part-with-checksum.

hrp_expand

BIP 173-style HRP expansion: [c >> 5 for c in hrp] ++ [0] ++ [c & 31 for c in hrp].

polymod_run

Run the BCH polymod over values starting from POLYMOD_INIT.