From a1facbe4ceb5645f2620a975fd8669b6ec37d7b3 Mon Sep 17 00:00:00 2001 From: Cesar Alvarez Vallero Date: Thu, 12 Aug 2021 20:17:11 -0300 Subject: [PATCH] Insert underscore correctly in CLTV opcode As CLTV opcode would not be recognized if some letter is wrong, the underscore should be correctly placed inside the opcode. --- 11_2_Using_CLTV_in_Scripts.md | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/11_2_Using_CLTV_in_Scripts.md b/11_2_Using_CLTV_in_Scripts.md index 1d934d6..02e07e3 100644 --- a/11_2_Using_CLTV_in_Scripts.md +++ b/11_2_Using_CLTV_in_Scripts.md @@ -38,7 +38,7 @@ Or this: ### Understand a CLTV Absolute Block Height -This is how `OPCHECKLOCKTIMEVERIFY` would check against a blockheight that was reached on May 24, 2017: +This is how `OP_CHECKLOCKTIMEVERIFY` would check against a blockheight that was reached on May 24, 2017: ``` 467951 OP_CHECKLOCKTIMEVERIFY ``` @@ -146,7 +146,7 @@ Finally, the remainder of the script runs, which is a normal check of a signatur ## Summary: Using CLTV in Scripts -`OP-CHECKLOCKTIMEVERIFY` is a simple opcode that looks at a single argument, interprets it as a blockheight or UNIX timestamp, and only allows its UTXO to be unlocked if that blockheight or UNIX timestamp is in the past. Setting `nLockTime` on the spending transaction is what allows Bitcoin to make this calculation. +`OP_CHECKLOCKTIMEVERIFY` is a simple opcode that looks at a single argument, interprets it as a blockheight or UNIX timestamp, and only allows its UTXO to be unlocked if that blockheight or UNIX timestamp is in the past. Setting `nLockTime` on the spending transaction is what allows Bitcoin to make this calculation. > :fire: ***What is the Power of CLTV?*** You've already seem that simple locktimes were one of the bases of Smart Contracts. CLTV takes the next step. Now you can both guarantee that a UTXO can't be spent before a certain time _and_ guarantee that it won't be spent either. In its simplest form, this could be used to create a trust that someone could only access when they reached 18 or a retirement fund that they could only access when they turned 50. However its true power comes when combined with conditionals, where the CLTV only activates in certain situations.