Shared signature-field helpers for typed-transaction structs that carry the
signature_y_parity / signature_r / signature_s triple
(EIP-1559 V2, EIP-4844 V3, and any future post-EIP-2718 type).
These functions operate on the struct as a plain map, so they work uniformly across the typed-transaction modules without coupling them to one another.
Summary
Functions
Attaches explicit signature fields (y_parity, r, s) to a transaction
struct. r and s must be exactly 32 bytes and v a boolean y-parity.
Attaches a packed r <> s <> v signature to a transaction struct.
Recovers the packed r <> s <> y_parity signature from a signed transaction,
or {:error, "transaction missing signature"} when any signature field is nil.
Derives EIP-155-style y-parity from a packed recovery v byte sequence.
Functions
Attaches explicit signature fields (y_parity, r, s) to a transaction
struct. r and s must be exactly 32 bytes and v a boolean y-parity.
Attaches a packed r <> s <> v signature to a transaction struct.
Recovers the packed r <> s <> y_parity signature from a signed transaction,
or {:error, "transaction missing signature"} when any signature field is nil.
Derives EIP-155-style y-parity from a packed recovery v byte sequence.