Documentation

Abstract over transaction identifiers, providing access to their raw byte representation for efficient comparison.

getRawTxId is used both as a faster equality proxy and as the key type for shared lookup tables.

Law:

• getRawTxId x == getRawTxId y iff x == y (raw equality is equivalent to txid equality; in particular, the raw bytes must uniquely identify the transaction so Map keys do not collide)

The Ord instance is only used to key ordered containers, so it does not need to agree with the ordering of the underlying txid (e.g. a serialised-bytes ordering is fine even when it sorts differently from the txid's own Ord).