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Fix typo

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Cesar Alvarez Vallero 2021-08-16 12:31:01 -03:00
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13_2_Writing_Complex_Multisig_Scripts.md
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@ -78,7 +78,7 @@ Script:
Running: 0 <sigVPA> <sigVPB> 2 <pubKeyVPA> <pubKeyVPB> <pubKeyVPC> 3 OP_CHECKMULTISIG Running: 0 <sigVPA> <sigVPB> 2 <pubKeyVPA> <pubKeyVPB> <pubKeyVPC> 3 OP_CHECKMULTISIG
Stack: [ ] Stack: [ ]
``` ```
You might notice that the President's signature just uses a simple `OP_CHECKSIGNATURE` rather than the more complex code ususally required for a P2PKH. We can get away with including the public key in the locking script, obviating the usual rigamarole, because it's hashed and won't be revealed (through the `redeemScript`) until the transaction is unlocked. This also allows for all of the possible signers to sign using the same methodology. You might notice that the President's signature just uses a simple `OP_CHECKSIGNATURE` rather than the more complex code usually required for a P2PKH. We can get away with including the public key in the locking script, obviating the usual rigamarole, because it's hashed and won't be revealed (through the `redeemScript`) until the transaction is unlocked. This also allows for all of the possible signers to sign using the same methodology.
The only possible problem is if the President is absent-minded and accidentally signs a transaction with one of his VPs, because he remembers this being a 2-of-3 multisig. One option is to decide that's an acceptable failure condition, because the President is using the multsig incorrectly. Another option is to turn the 2-of-3 multisig into a 2-of-4 multisig, just in case the President doesn't tolerate failure: `OP_DEPTH 1 OP_EQUAL IF <pubKeyPres> OP_CHECKSIGNATURE ELSE 2 <pubKeyVPA> <pubKeyVPB> <pubKeyVPC> <pubKeyPres> 4 OP_CHECKMULTISIG ENDIF`. This would allow the President to mistakenly sign with any Vice President, but wouldn't impact things if two Vice Presidents wanted to (correctly) sign. The only possible problem is if the President is absent-minded and accidentally signs a transaction with one of his VPs, because he remembers this being a 2-of-3 multisig. One option is to decide that's an acceptable failure condition, because the President is using the multsig incorrectly. Another option is to turn the 2-of-3 multisig into a 2-of-4 multisig, just in case the President doesn't tolerate failure: `OP_DEPTH 1 OP_EQUAL IF <pubKeyPres> OP_CHECKSIGNATURE ELSE 2 <pubKeyVPA> <pubKeyVPB> <pubKeyVPC> <pubKeyPres> 4 OP_CHECKMULTISIG ENDIF`. This would allow the President to mistakenly sign with any Vice President, but wouldn't impact things if two Vice Presidents wanted to (correctly) sign.