stack value is not 0, duplicate. When the behaviour of nLockTime is restored to bitcoin.de bezahlt und keine coins the original design from Satoshi, a variant of this protocol is required which is discussed below. Push data Several opcodes are provided to push custom data. Constants The following opcodes push the numbers 0-16 onto the stack: opcode encoding OP_0 00 OP_1-OP_16 51-60 By convention, OP_0 and OP_1 also express the boolean OP_false (zero) and OP_true (non-zero). Js line 14, a bitcoin script is executed from left to right. # Bitcoin Center - Redeem Bitcoin For Cash Bitcoin Price.