Module opcodes

Expand description

Bitcoin Script opcode constant definitions. Bitcoin script opcode definitions.

All standard opcodes from OP_0 (0x00) through OP_INVALIDOPCODE (0xff). Includes opcode-to-string and string-to-opcode mappings for ASM output, plus utility functions for classifying opcodes.

Constants§

OP_0: Push an empty byte array (false/zero) onto the stack.
OP_0NOTEQUAL: Push 0 if the top item is 0, push 1 otherwise.
OP_1: Push the number 1 onto the stack.
OP_2: Push the number 2 onto the stack.
OP_3: Push the number 3 onto the stack.
OP_4: Push the number 4 onto the stack.
OP_5: Push the number 5 onto the stack.
OP_6: Push the number 6 onto the stack.
OP_7: Push the number 7 onto the stack.
OP_8: Push the number 8 onto the stack.
OP_9: Push the number 9 onto the stack.
OP_1ADD: Add 1 to the top stack item.
OP_1NEGATE: Push the number -1 onto the stack.
OP_1SUB: Subtract 1 from the top stack item.
OP_2DIV: Divide the top stack item by 2 (disabled).
OP_2DROP: Remove the top two stack items.
OP_2DUP: Duplicate the top two stack items.
OP_2MUL: Multiply the top stack item by 2 (disabled).
OP_2OVER: Copy the pair of items two spaces back to the front of the stack.
OP_2ROT: Move the fifth and sixth items to the top of the stack.
OP_2SWAP: Swap the top two pairs of items on the stack.
OP_3DUP: Duplicate the top three stack items.
OP_10: Push the number 10 onto the stack.
OP_11: Push the number 11 onto the stack.
OP_12: Push the number 12 onto the stack.
OP_13: Push the number 13 onto the stack.
OP_14: Push the number 14 onto the stack.
OP_15: Push the number 15 onto the stack.
OP_16: Push the number 16 onto the stack.
OP_ABS: Replace the top stack item with its absolute value.
OP_ADD: Pop two items, push their sum.
OP_AND: Bitwise AND of the top two stack items.
OP_BASE: Base value for small integer opcodes (OP_1 through OP_16 = OP_BASE + N).
OP_BIN2NUM: Convert a byte array to a numeric value.
OP_BOOLAND: Push 1 if both top two items are non-zero, 0 otherwise.
OP_BOOLOR: Push 1 if either of the top two items is non-zero, 0 otherwise.
OP_CAT: Concatenate the top two stack items.
OP_CHECKLOCKTIMEVERIFY: Verify that the transaction locktime is at least the given value (BTC only, NOP in BSV).
OP_CHECKMULTISIG: Pop N public keys and M signatures, push 1 if all signatures are valid, 0 otherwise.
OP_CHECKMULTISIGVERIFY: Same as OP_CHECKMULTISIG, then OP_VERIFY. Marks transaction invalid if check fails.
OP_CHECKSEQUENCEVERIFY: Verify that the input sequence number is at least the given value (BTC only, NOP in BSV).
OP_CHECKSIG: Pop a public key and signature, push 1 if the signature is valid, 0 otherwise.
OP_CHECKSIGVERIFY: Same as OP_CHECKSIG, then OP_VERIFY. Marks transaction invalid if signature check fails.
OP_CODESEPARATOR: Mark the beginning of signature-checked code.
OP_DATA_1: Push the next 1 byte onto the stack.
OP_DATA_2: Push the next 2 bytes onto the stack.
OP_DATA_3: Push the next 3 bytes onto the stack.
OP_DATA_4: Push the next 4 bytes onto the stack.
OP_DATA_5: Push the next 5 bytes onto the stack.
OP_DATA_6: Push the next 6 bytes onto the stack.
OP_DATA_7: Push the next 7 bytes onto the stack.
OP_DATA_8: Push the next 8 bytes onto the stack.
OP_DATA_9: Push the next 9 bytes onto the stack.
OP_DATA_10: Push the next 10 bytes onto the stack.
OP_DATA_11: Push the next 11 bytes onto the stack.
OP_DATA_12: Push the next 12 bytes onto the stack.
OP_DATA_13: Push the next 13 bytes onto the stack.
OP_DATA_14: Push the next 14 bytes onto the stack.
OP_DATA_15: Push the next 15 bytes onto the stack.
OP_DATA_16: Push the next 16 bytes onto the stack.
OP_DATA_17: Push the next 17 bytes onto the stack.
OP_DATA_18: Push the next 18 bytes onto the stack.
OP_DATA_19: Push the next 19 bytes onto the stack.
OP_DATA_20: Push the next 20 bytes onto the stack.
OP_DATA_21: Push the next 21 bytes onto the stack.
OP_DATA_22: Push the next 22 bytes onto the stack.
OP_DATA_23: Push the next 23 bytes onto the stack.
OP_DATA_24: Push the next 24 bytes onto the stack.
OP_DATA_25: Push the next 25 bytes onto the stack.
OP_DATA_26: Push the next 26 bytes onto the stack.
OP_DATA_27: Push the next 27 bytes onto the stack.
OP_DATA_28: Push the next 28 bytes onto the stack.
OP_DATA_29: Push the next 29 bytes onto the stack.
OP_DATA_30: Push the next 30 bytes onto the stack.
OP_DATA_31: Push the next 31 bytes onto the stack.
OP_DATA_32: Push the next 32 bytes onto the stack.
OP_DATA_33: Push the next 33 bytes onto the stack.
OP_DATA_34: Push the next 34 bytes onto the stack.
OP_DATA_35: Push the next 35 bytes onto the stack.
OP_DATA_36: Push the next 36 bytes onto the stack.
OP_DATA_37: Push the next 37 bytes onto the stack.
OP_DATA_38: Push the next 38 bytes onto the stack.
OP_DATA_39: Push the next 39 bytes onto the stack.
OP_DATA_40: Push the next 40 bytes onto the stack.
OP_DATA_41: Push the next 41 bytes onto the stack.
OP_DATA_42: Push the next 42 bytes onto the stack.
OP_DATA_43: Push the next 43 bytes onto the stack.
OP_DATA_44: Push the next 44 bytes onto the stack.
OP_DATA_45: Push the next 45 bytes onto the stack.
OP_DATA_46: Push the next 46 bytes onto the stack.
OP_DATA_47: Push the next 47 bytes onto the stack.
OP_DATA_48: Push the next 48 bytes onto the stack.
OP_DATA_49: Push the next 49 bytes onto the stack.
OP_DATA_50: Push the next 50 bytes onto the stack.
OP_DATA_51: Push the next 51 bytes onto the stack.
OP_DATA_52: Push the next 52 bytes onto the stack.
OP_DATA_53: Push the next 53 bytes onto the stack.
OP_DATA_54: Push the next 54 bytes onto the stack.
OP_DATA_55: Push the next 55 bytes onto the stack.
OP_DATA_56: Push the next 56 bytes onto the stack.
OP_DATA_57: Push the next 57 bytes onto the stack.
OP_DATA_58: Push the next 58 bytes onto the stack.
OP_DATA_59: Push the next 59 bytes onto the stack.
OP_DATA_60: Push the next 60 bytes onto the stack.
OP_DATA_61: Push the next 61 bytes onto the stack.
OP_DATA_62: Push the next 62 bytes onto the stack.
OP_DATA_63: Push the next 63 bytes onto the stack.
OP_DATA_64: Push the next 64 bytes onto the stack.
OP_DATA_65: Push the next 65 bytes onto the stack.
OP_DATA_66: Push the next 66 bytes onto the stack.
OP_DATA_67: Push the next 67 bytes onto the stack.
OP_DATA_68: Push the next 68 bytes onto the stack.
OP_DATA_69: Push the next 69 bytes onto the stack.
OP_DATA_70: Push the next 70 bytes onto the stack.
OP_DATA_71: Push the next 71 bytes onto the stack.
OP_DATA_72: Push the next 72 bytes onto the stack.
OP_DATA_73: Push the next 73 bytes onto the stack.
OP_DATA_74: Push the next 74 bytes onto the stack.
OP_DATA_75: Push the next 75 bytes onto the stack.
OP_DEPTH: Push the number of items on the stack onto the stack.
OP_DIV: Pop two items, push the integer quotient of the second divided by the top.
OP_DROP: Remove the top stack item.
OP_DUP: Duplicate the top stack item.
OP_ELSE: Execute the following statements if the preceding OP_IF/OP_NOTIF was not executed.
OP_ENDIF: End an if/else block.
OP_EQUAL: Push 1 if the top two stack items are exactly equal, 0 otherwise.
OP_EQUALVERIFY: Same as OP_EQUAL, then OP_VERIFY. Marks transaction invalid if not equal.
OP_FALSE: Push an empty byte array (false/zero) onto the stack. Alias for OP_0.
OP_FROMALTSTACK: Move the top item from the alt stack to the main stack.
OP_GREATERTHAN: Push 1 if the second item is greater than the top item, 0 otherwise.
OP_GREATERTHANOREQUAL: Push 1 if the second item is greater than or equal to the top item, 0 otherwise.
OP_HASH160: Hash the top item with SHA-256 then RIPEMD-160 (Bitcoin address hash).
OP_HASH256: Hash the top item with double SHA-256 (Bitcoin transaction hash).
OP_IF: Execute the following statements if the top stack value is true (non-zero).
OP_IFDUP: Duplicate the top stack item if it is non-zero.
OP_INVALIDOPCODE: Invalid opcode that always causes script failure.
OP_INVERT: Flip all bits of the top stack item.
OP_LESSTHAN: Push 1 if the second item is less than the top item, 0 otherwise.
OP_LESSTHANOREQUAL: Push 1 if the second item is less than or equal to the top item, 0 otherwise.
OP_LSHIFT: Left-shift the second item by the number of bits given by the top item.
OP_MAX: Push the larger of the top two stack items.
OP_MIN: Push the smaller of the top two stack items.
OP_MOD: Pop two items, push the remainder of the second divided by the top.
OP_MUL: Pop two items, push their product.
OP_NEGATE: Negate the top stack item (flip its sign).
OP_NIP: Remove the second-to-top stack item.
OP_NOP: Do nothing.
OP_NOP1: No operation (reserved for future soft-fork upgrades).
OP_NOP2: No operation (reserved for future soft-fork upgrades). Alias for OP_CHECKLOCKTIMEVERIFY in BTC.
OP_NOP3: No operation (reserved for future soft-fork upgrades). Alias for OP_CHECKSEQUENCEVERIFY in BTC.
OP_NOP4: No operation (reserved for future soft-fork upgrades).
OP_NOP5: No operation (reserved for future soft-fork upgrades).
OP_NOP6: No operation (reserved for future soft-fork upgrades).
OP_NOP7: No operation (reserved for future soft-fork upgrades).
OP_NOP8: No operation (reserved for future soft-fork upgrades).
OP_NOP9: No operation (reserved for future soft-fork upgrades).
OP_NOP10: No operation (reserved for future soft-fork upgrades).
OP_NOT: Push 1 if the top item is 0, push 0 otherwise.
OP_NOTIF: Execute the following statements if the top stack value is false (zero).
OP_NUM2BIN: Convert the top numeric value to a byte array of the specified length.
OP_NUMEQUAL: Push 1 if the top two items are numerically equal, 0 otherwise.
OP_NUMEQUALVERIFY: Same as OP_NUMEQUAL, then OP_VERIFY. Marks transaction invalid if not equal.
OP_NUMNOTEQUAL: Push 1 if the top two items are not numerically equal, 0 otherwise.
OP_OR: Bitwise OR of the top two stack items.
OP_OVER: Copy the second-to-top stack item to the top.
OP_PICK: Copy the item N positions back in the stack to the top.
OP_PUBKEY: Internal pseudo-opcode representing a public key (used in template matching).
OP_PUBKEYHASH: Internal pseudo-opcode representing a public key hash (used in template matching).
OP_PUBKEYS: Internal pseudo-opcode representing multiple public keys (used in template matching).
OP_PUSHDATA1: Read the next 1 byte as a length N, then push the next N bytes onto the stack.
OP_PUSHDATA2: Read the next 2 bytes as a little-endian length N, then push the next N bytes onto the stack.
OP_PUSHDATA4: Read the next 4 bytes as a little-endian length N, then push the next N bytes onto the stack.
OP_RESERVED: Reserved opcode. Transaction is invalid if executed.
OP_RESERVED1: Reserved opcode. Transaction is invalid if executed.
OP_RESERVED2: Reserved opcode. Transaction is invalid if executed.
OP_RETURN: Mark the transaction output as unspendable (provably prunable).
OP_RIPEMD160: Hash the top item with RIPEMD-160.
OP_ROLL: Move the item N positions back in the stack to the top.
OP_ROT: Rotate the top three items on the stack (third item moves to top).
OP_RSHIFT: Right-shift the second item by the number of bits given by the top item.
OP_SHA1: Hash the top item with SHA-1.
OP_SHA256: Hash the top item with SHA-256.
OP_SIZE: Push the byte length of the top stack item (without popping it).
OP_SMALLINTEGER: Internal pseudo-opcode representing a small integer (used in template matching).
OP_SPLIT: Split the second-to-top item at position given by the top item.
OP_SUB: Pop two items, push the second minus the top.
OP_SWAP: Swap the top two stack items.
OP_TOALTSTACK: Move the top stack item to the alt stack.
OP_TRUE: Push the number 1 onto the stack. Alias for OP_1.
OP_TUCK: Copy the top stack item and insert it below the second-to-top item.
OP_UNKNOWN186: Unknown opcode 186 (0xba). Undefined behavior.
OP_UNKNOWN187: Unknown opcode 187 (0xbb). Undefined behavior.
OP_UNKNOWN188: Unknown opcode 188 (0xbc). Undefined behavior.
OP_UNKNOWN189: Unknown opcode 189 (0xbd). Undefined behavior.
OP_UNKNOWN190: Unknown opcode 190 (0xbe). Undefined behavior.
OP_UNKNOWN191: Unknown opcode 191 (0xbf). Undefined behavior.
OP_UNKNOWN192: Unknown opcode 192 (0xc0). Undefined behavior.
OP_UNKNOWN193: Unknown opcode 193 (0xc1). Undefined behavior.
OP_UNKNOWN194: Unknown opcode 194 (0xc2). Undefined behavior.
OP_UNKNOWN195: Unknown opcode 195 (0xc3). Undefined behavior.
OP_UNKNOWN196: Unknown opcode 196 (0xc4). Undefined behavior.
OP_UNKNOWN197: Unknown opcode 197 (0xc5). Undefined behavior.
OP_UNKNOWN198: Unknown opcode 198 (0xc6). Undefined behavior.
OP_UNKNOWN199: Unknown opcode 199 (0xc7). Undefined behavior.
OP_UNKNOWN200: Unknown opcode 200 (0xc8). Undefined behavior.
OP_UNKNOWN201: Unknown opcode 201 (0xc9). Undefined behavior.
OP_UNKNOWN202: Unknown opcode 202 (0xca). Undefined behavior.
OP_UNKNOWN203: Unknown opcode 203 (0xcb). Undefined behavior.
OP_UNKNOWN204: Unknown opcode 204 (0xcc). Undefined behavior.
OP_UNKNOWN205: Unknown opcode 205 (0xcd). Undefined behavior.
OP_UNKNOWN206: Unknown opcode 206 (0xce). Undefined behavior.
OP_UNKNOWN207: Unknown opcode 207 (0xcf). Undefined behavior.
OP_UNKNOWN208: Unknown opcode 208 (0xd0). Undefined behavior.
OP_UNKNOWN209: Unknown opcode 209 (0xd1). Undefined behavior.
OP_UNKNOWN210: Unknown opcode 210 (0xd2). Undefined behavior.
OP_UNKNOWN211: Unknown opcode 211 (0xd3). Undefined behavior.
OP_UNKNOWN212: Unknown opcode 212 (0xd4). Undefined behavior.
OP_UNKNOWN213: Unknown opcode 213 (0xd5). Undefined behavior.
OP_UNKNOWN214: Unknown opcode 214 (0xd6). Undefined behavior.
OP_UNKNOWN215: Unknown opcode 215 (0xd7). Undefined behavior.
OP_UNKNOWN216: Unknown opcode 216 (0xd8). Undefined behavior.
OP_UNKNOWN217: Unknown opcode 217 (0xd9). Undefined behavior.
OP_UNKNOWN218: Unknown opcode 218 (0xda). Undefined behavior.
OP_UNKNOWN219: Unknown opcode 219 (0xdb). Undefined behavior.
OP_UNKNOWN220: Unknown opcode 220 (0xdc). Undefined behavior.
OP_UNKNOWN221: Unknown opcode 221 (0xdd). Undefined behavior.
OP_UNKNOWN222: Unknown opcode 222 (0xde). Undefined behavior.
OP_UNKNOWN223: Unknown opcode 223 (0xdf). Undefined behavior.
OP_UNKNOWN224: Unknown opcode 224 (0xe0). Undefined behavior.
OP_UNKNOWN225: Unknown opcode 225 (0xe1). Undefined behavior.
OP_UNKNOWN226: Unknown opcode 226 (0xe2). Undefined behavior.
OP_UNKNOWN227: Unknown opcode 227 (0xe3). Undefined behavior.
OP_UNKNOWN228: Unknown opcode 228 (0xe4). Undefined behavior.
OP_UNKNOWN229: Unknown opcode 229 (0xe5). Undefined behavior.
OP_UNKNOWN230: Unknown opcode 230 (0xe6). Undefined behavior.
OP_UNKNOWN231: Unknown opcode 231 (0xe7). Undefined behavior.
OP_UNKNOWN232: Unknown opcode 232 (0xe8). Undefined behavior.
OP_UNKNOWN233: Unknown opcode 233 (0xe9). Undefined behavior.
OP_UNKNOWN234: Unknown opcode 234 (0xea). Undefined behavior.
OP_UNKNOWN235: Unknown opcode 235 (0xeb). Undefined behavior.
OP_UNKNOWN236: Unknown opcode 236 (0xec). Undefined behavior.
OP_UNKNOWN237: Unknown opcode 237 (0xed). Undefined behavior.
OP_UNKNOWN238: Unknown opcode 238 (0xee). Undefined behavior.
OP_UNKNOWN239: Unknown opcode 239 (0xef). Undefined behavior.
OP_UNKNOWN240: Unknown opcode 240 (0xf0). Undefined behavior.
OP_UNKNOWN241: Unknown opcode 241 (0xf1). Undefined behavior.
OP_UNKNOWN242: Unknown opcode 242 (0xf2). Undefined behavior.
OP_UNKNOWN243: Unknown opcode 243 (0xf3). Undefined behavior.
OP_UNKNOWN244: Unknown opcode 244 (0xf4). Undefined behavior.
OP_UNKNOWN245: Unknown opcode 245 (0xf5). Undefined behavior.
OP_UNKNOWN246: Unknown opcode 246 (0xf6). Undefined behavior.
OP_UNKNOWN247: Unknown opcode 247 (0xf7). Undefined behavior.
OP_UNKNOWN248: Unknown opcode 248 (0xf8). Undefined behavior.
OP_UNKNOWN249: Unknown opcode 249 (0xf9). Undefined behavior.
OP_UNKNOWN252: Unknown opcode 252 (0xfc). Undefined behavior.
OP_VER: Reserved opcode. Transaction is invalid if executed.
OP_VERIF: Reserved opcode. Transaction is invalid even if not executed.
OP_VERIFY: Mark the transaction as invalid if the top stack value is false.
OP_VERNOTIF: Reserved opcode. Transaction is invalid even if not executed.
OP_WITHIN: Push 1 if the third item is within the range [second, top), 0 otherwise.
OP_XOR: Bitwise XOR of the top two stack items.

Functions§

is_push_data: Check if an opcode is a push data opcode (OP_DATA_1..OP_PUSHDATA4).
is_small_int_op: Check if an opcode represents a small integer (OP_0 or OP_1..OP_16).
opcode_to_string: Convert an opcode byte value to its string representation for ASM output.
string_to_opcode: Convert an opcode name string to its byte value.

Module opcodes

Module opcodes Copy item path

Constants§

Functions§

Module opcodes