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Merge pull request #420 from csralvall/fix-11_2

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Fix possible typos in chapter 11.2
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Shannon Appelcline 2021-08-17 09:34:07 -10:00 committed by GitHub
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11_2_Using_CLTV_in_Scripts.md
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@ -38,7 +38,7 @@ Or this:
### Understand a CLTV Absolute Block Height ### 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 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 ## 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. > :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.