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Update 8_1_Building_a_Bitcoin_Script_with_P2SH.md

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Shannon Appelcline 2017-05-17 15:13:27 -07:00 committed by GitHub
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8_1_Building_a_Bitcoin_Script_with_P2SH.md
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@ -62,7 +62,7 @@ When a UTXO is redeemed, the redeemScript in the `scriptSig` is hashed and compa
In [7.2: Running a Bitcoin Script](7_2_Running_a_Bitcoin_Script.md), we offered a simple example of a non-standard locking script, `OP_ADD 100 OP_EQUAL`, and we detailed how to run it as a simple concatenation of an unlocking script with that locking script. We're now going to repeat that exercise, this time within the constraints of a P2SH transaction. In [7.2: Running a Bitcoin Script](7_2_Running_a_Bitcoin_Script.md), we offered a simple example of a non-standard locking script, `OP_ADD 100 OP_EQUAL`, and we detailed how to run it as a simple concatenation of an unlocking script with that locking script. We're now going to repeat that exercise, this time within the constraints of a P2SH transaction.
### Lock a P2SH Transaction ### Create the Lock for the P2SH Transaction
To lock this transaction requires the following: To lock this transaction requires the following:
@ -71,7 +71,7 @@ To lock this transaction requires the following:
3. Produce a P2SH locking script that includes the hashed script (`OP_HASH160 <hashedHundredEqual> OP_EQUAL`). 3. Produce a P2SH locking script that includes the hashed script (`OP_HASH160 <hashedHundredEqual> OP_EQUAL`).
4. Create the transaction with that `scriptPubKey`. 4. Create the transaction with that `scriptPubKey`.
### Unlock a P2SH Transaction: Round One ### Run the First Round of Validation
To unlock this transaction requires that the recipient produce a `scriptSig` that prepends two constants totalling one hundred to the serialized script: `1 99 <serializedHundredEqual>`. To unlock this transaction requires that the recipient produce a `scriptSig` that prepends two constants totalling one hundred to the serialized script: `1 99 <serializedHundredEqual>`.
@ -102,7 +102,7 @@ The Script ends with a `True` on top of the stack, and so it succeeds ... even t
However, because this was a P2SH script, the execution isn't done. However, because this was a P2SH script, the execution isn't done.
### The Second Round of Validation ### Run the Second Round of Validation
For the second round of validation, Bitcoin now runs the actual redeemScript against the items pushed onto the stack ahead of it: For the second round of validation, Bitcoin now runs the actual redeemScript against the items pushed onto the stack ahead of it: