feat(wasm-utxo): expose ZEC branch ID APIs on ZcashBitGoPsbt#296
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Adds consensus_branch_id() to the wasm_bindgen BitGoPsbt impl (Zcash
variant only; returns None for non-ZEC PSBTs). Adds a
zcash_branch_id_for_height() free function wrapping the existing Rust
branch_id_for_height, returning a Result so it throws on unrecognised
network strings ("zcash"/"zec" for mainnet, "zcashTest"/"tzec" for
testnet — anything else is an error).
TypeScript ZcashBitGoPsbt gains:
consensusBranchId: number | undefined — reads the branch ID stored in
the PSBT proprietary map (absent for v5 or non-ZEC PSBTs).
static branchIdForHeight(network, height): number | undefined — returns
the consensus branch ID active at a given chain height.
These APIs allow callers (e.g. ims-utxo parse path) to validate a PSBT's
consensus branch ID against the current chain height without importing
@bitgo-beta/utxo-lib.
Refs: T1-3519
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davidkaplanbitgo
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Jun 17, 2026
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Adds
consensus_branch_id()to the#[wasm_bindgen] impl BitGoPsbt(Zcash variant only; returnsNonefor non-ZEC PSBTs). Adds azcash_branch_id_for_height()free function that wraps the existing Rustbranch_id_for_height, returning aResultso it throws on unrecognised network strings — only"zcash"/"zec"(mainnet) and"zcashTest"/"tzec"(testnet) are accepted.TypeScript
ZcashBitGoPsbtgains:consensusBranchId: number | undefined— reads the branch ID from the PSBT proprietary map (absent for v5 or non-ZEC PSBTs)static branchIdForHeight(network, height): number | undefined— returns the consensus branch ID active at a given chain heightThese APIs let callers (e.g. ims-utxo parse path) validate a PSBT's consensus branch ID against the current chain height without importing
@bitgo-beta/utxo-lib.Refs: T1-3519