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Satoshi-Era Bitcoin Function 'OP_CAT' Dusted Off as Development Fervor Grows

Developers Ethan Heilman and Armin Sabouri view OP_CAT as a simple opcode that offers some of the general purpose functionality currently missing in Bitcoin

By Jamie Crawley|Edited by Bradley Keoun

Updated Mar 8, 2024, 9:32 p.m. Published Feb 14, 2024, 12:11 p.m.

Armin Sabouri (left), one of the co-authors of the OP_CAT proposal; with Dan Gould, a Bitcoin developer; and co-author Ethan Heilman, in October at Chaincode Labs' Bitcoin Research Day, in New York. (Neha Narula)