Crate md_codec 

md-codec

Reference implementation of the Mnemonic Descriptor (MD) format — an engravable backup format for BIP 388 wallet policies.

v0.30 wire format: bit-aligned payload, sparse per-@N TLV overrides, 5-bit single-payload header (4-bit version=4 + divergent_paths flag), 6-bit bytecode tag space, decoder auto-dispatch between single and chunked payloads via the first 5-bit symbol’s bit 0, symbol-aligned codex32 wrapping with HRP "md". See design/SPEC_v0_30_wire_format.md for the normative spec.

Re-exports

pub use canonicalize::canonicalize_placeholder_indices;

pub use chunk::ChunkHeader;

pub use chunk::derive_chunk_set_id;

pub use chunk::reassemble;

pub use chunk::split;

pub use decode::decode_md1_string;

pub use decode::decode_payload;

pub use encode::Descriptor;

pub use encode::encode_md1_string;

pub use encode::encode_payload;

pub use error::Error;

pub use header::Header;

pub use identity::Md1EncodingId;

pub use identity::WalletDescriptorTemplateId;

pub use identity::WalletPolicyId;

pub use identity::compute_md1_encoding_id;

pub use identity::compute_wallet_descriptor_template_id;

pub use identity::compute_wallet_policy_id;

pub use identity::validate_presence_byte;

pub use origin_path::OriginPath;

pub use origin_path::PathComponent;

pub use origin_path::PathDecl;

pub use origin_path::PathDeclPaths;

pub use phrase::Phrase;

pub use tag::Tag;

pub use tlv::TlvSection;

Modules

bitstream

Bit-aligned reader and writer.

canonical_origin

Canonical-origin map per spec §4 (v0.13 wallet-policy layer).

canonicalize

BIP 388 placeholder-ordering canonicalization per spec v0.13 §6.1, plus per-@N canonical-fill expansion per §5.3 / §6.3.

chunk

Chunk header per SPEC v0.30 §2.2.

codex32

v0.11 ↔ codex32 BCH layer adapter, symbol-aligned per spec §3.1 / D7.

decode

Top-level decoder per spec §13.2.

derive

Address derivation (v0.32).

encode

Top-level encoder per spec §13.3.

error

Error variants for the md-codec wire-format codec.

header

Single-payload header (5 bits) per SPEC v0.30 §2.1.

identity

Identity computation per spec §8.

origin_path

Origin-path-decl block per spec §3.4.

phrase

BIP-39 phrase rendering per spec §8.4.

tag

v0.30 Tag enum per SPEC §3.

test_vectors

Canonical md test-vector corpus.

tlv

TLV section per spec §3.7 (extended in v0.13 §3.2 with Pubkeys and OriginPathOverrides).

to_miniscript

v0.32 AST → miniscript::Descriptor<DescriptorPublicKey> converter.

tree

Tree (operator AST) per spec §3.6 + §6.

use_site_path

Use-site-path-decl block per spec §3.5.

validate

Decoder-side validation per spec §7.

varint

LP4-ext varint per spec §4.1.