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Update ch07.asciidoc

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refactored text to create sizeable tip box; fixed typos
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krupawan5618 2021-03-05 19:48:37 -05:00 committed by GitHub
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@ -177,11 +177,11 @@ If the redeem script hash matches, the unlocking script is executed on its own,
<Sig1> <Sig2> 2 PK1 PK2 PK3 PK4 PK5 5 CHECKMULTISIG
----
Almost all the scripts described in this chapter can only be implemented as P2SH scripts. For example, a 2 of 5 standard multisignature locking script cannot be used directly in the locking script of an UTXO, as +IsStandard()+ would invalidate the transaction. To conform, a P2SH locking script can be used instead, as seen above. A transaction that then includes a P2SH unlocking script can be used to redeem this UTXO and will be valid so long as it does not contain more than 15 public keys. ((("", startref="mohamseven")))
[TIP]
====
Remember, because of policy set forth by the +IsStandard()+ function at the time of this writing, standard multisignature scripts are limited to at most 3 listed public keys, while P2SH are limited to at most 15 public keys. Standard multisignature scripts can invalidate transactions by way of their locking +or+ unlocking script, while P2SH can invalidate transactions by way of their unlocking script +only+. This is because there is no way for +IsStandard()+ to tell if a hash of a redeem script in a locking script includes more signatures than the currenetly imposed size limitation, so it can only observe the unlocking scripts in transaction inputs.
Almost all the scripts described in this chapter can only be implemented as P2SH scripts. For example, a 2 of 5 standard multisignature locking script cannot be used directly in the locking script of an UTXO, as +IsStandard()+ would invalidate the transaction. To conform, a P2SH locking script can be used instead, as seen above. A transaction that then includes a P2SH unlocking script can be used to redeem this UTXO and will be valid so long as it does not contain more than 15 public keys. ((("", startref="mohamseven")))
Remember, because of policy set forth by the +IsStandard()+ function at the time of this writing, standard multisignature scripts are limited to at most 3 listed public keys, while P2SH are limited to at most 15 listed public keys. Standard multisignature scripts can invalidate transactions by way of their locking +or+ unlocking script, while P2SH can invalidate transactions by way of their unlocking script +only+. This is because there is no way for +IsStandard()+ to tell if a hash of a redeem script in a locking script includes more signatures than the currently imposed size limitation, so it can only observe the unlocking scripts in transaction inputs.
====
==== P2SH Addresses