The sequence number used to signal Replace-by-Fee (RBF) for a transaction input.
As per BIP125, a transaction signals RBF if at least one of its inputs has
a sequence number less than (0xffffffff - 1). This constant uses
(0xffffffff - 2) to clearly signal RBF while leaving room for other
potential sequence number use cases.
The sequence number used to signal Replace-by-Fee (RBF) for a transaction input.
As per BIP125, a transaction signals RBF if at least one of its inputs has a sequence number less than (0xffffffff - 1). This constant uses (0xffffffff - 2) to clearly signal RBF while leaving room for other potential sequence number use cases.