The last byte is the hash type and this is checked during OP_CHECKSIG but apparently due to some old code it is checked twice. The duplicate check is actually more strict than the first so nothing slipped through the cracks but unfortunately it is too strict.
The last byte is the hash type and this is checked during
OP_CHECKSIG
but apparently due to some old code it is checked twice. The duplicate check is actually more strict than the first so nothing slipped through the cracks but unfortunately it is too strict.