- Pay To Anchor(P2A) is a new standard witness output type for spending,
a newly recognised output template. This allows for key-less anchor
outputs, with compact spending conditions for additional efficiencies on
top of an equivalent
sh(OP_TRUE)output, in addition to the txid stability of the spending transaction. N.B. propagation of this output spending on the network will be limited until a sufficient number of nodes on the network adopt this upgrade.