Yugocana

## discourage_upgradable_nops.patch
From e8c444d5f8891da6c87cb964b9a9a447c97d96f7 Mon Sep 17 00:00:00 2001
From: [Your Name]
Date: [Date]

Subject: [PATCH] Discourage the use of upgradable NOPs in scripts

This patch adds a new check to the EvalScript function to discourage the use of upgradable NOPs (i.e. OP_NOP, OP_NOP1, OP_NOP2, OP_NOP3, OP_NOP4, and OP_NOP5) in scripts when the SCRIPT_VERIFY_DISCOURAGE_UPGRADABLE_NOPS flag is set. Specifically, if the script contains an OP_FALSE opcode that is immediately followed by an OP_IF opcode, the function will return a SCRIPT_ERR_DISCOURAGE_UPGRADABLE_NOPS error.

The purpose of this check is to encourage script authors to use OP_CHECKLOCKTIMEVERIFY (OP_CLTV) and OP_CHECKSEQUENCEVERIFY (OP_CSV) opcodes instead of upgradable NOPs in order to ensure the security and compatibility of Bitcoin scripts.
	From e8c444d5f8891da6c87cb964b9a9a447c97d96f7 Mon Sep 17 00:00:00 2001
	From: [Your Name]
	Date: [Date]

	Subject: [PATCH] Discourage the use of upgradable NOPs in scripts

	This patch adds a new check to the EvalScript function to discourage the use of upgradable NOPs (i.e. OP_NOP, OP_NOP1, OP_NOP2, OP_NOP3, OP_NOP4, and OP_NOP5) in scripts when the SCRIPT_VERIFY_DISCOURAGE_UPGRADABLE_NOPS flag is set. Specifically, if the script contains an OP_FALSE opcode that is immediately followed by an OP_IF opcode, the function will return a SCRIPT_ERR_DISCOURAGE_UPGRADABLE_NOPS error.

	The purpose of this check is to encourage script authors to use OP_CHECKLOCKTIMEVERIFY (OP_CLTV) and OP_CHECKSEQUENCEVERIFY (OP_CSV) opcodes instead of upgradable NOPs in order to ensure the security and compatibility of Bitcoin scripts.