Opcodes · splice · enabled

OP_SPLIT (0x7f)

Splits a byte string at position n into two items. It took over the byte of the disabled OP_SUBSTR and replaces OP_SUBSTR, OP_LEFT and OP_RIGHT.

Verified
Stack in → out
x n → x[0..n) x[n..)
Since
May 2018: 32 MB blocks and restored opcodes
Cost
Base instruction cost 100 plus the bytes of both pushed parts (2025 VM limits).
Bitcoin status
Not in Bitcoin (BTC)0x7f is the disabled OP_SUBSTR in BTC; an OP_SUCCESS code in Tapscript.

Example

<0x112233> OP_1 OP_SPLIT

Step through it opcode by opcode in Bitauth IDE, the in-browser BCH VM debugger.

Sources

  1. BCHN upgrade specs: Restore disabled script opcodes, May 2018
  2. Libauth BCH_2023_05 opcodes (bch-2023-opcodes.ts)
  3. BIP-342: Validation of Taproot Scripts