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Replace misleading 'return' terminology with 'push'

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Saying opcodes return values gives the impression the script is being
returned.
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Peter Todd 2014-09-18 20:34:14 -04:00 • committed by David Harding
parent 9183f98bc1
commit c77556c786
1 changed files with 13 additions and 13 deletions
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26
_includes/ref_transactions.md
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@ -16,21 +16,21 @@ The op codes used in the scriptPubKeys of standard transactions are:
* `OP_TRUE`/`OP_1` (0x51), and `OP_2` through `OP_16` (0x52--0x60), which * `OP_TRUE`/`OP_1` (0x51), and `OP_2` through `OP_16` (0x52--0x60), which
(respectively) push the values 1, and 2--16 to the stack. (respectively) push the values 1, and 2--16 to the stack.
* [`OP_CHECKSIG`][op_checksig]{:#term-op-checksig}{:.term} consumes a signature and a full public key, and returns * [`OP_CHECKSIG`][op_checksig]{:#term-op-checksig}{:.term} consumes a signature and a full public key, and pushes
true if the the transaction data specified by the SIGHASH flag was true onto the stack if the the transaction data specified by the SIGHASH flag was
converted into the signature using the same ECDSA private key that converted into the signature using the same ECDSA private key that
generated the public key. Otherwise, it returns false. generated the public key. Otherwise, it pushes false onto the stack.
* [`OP_DUP`][op_dup]{:#term-op-dup}{:.term} returns a copy of the item on the stack below it. * [`OP_DUP`][op_dup]{:#term-op-dup}{:.term} pushes a copy of the topmost stack item to the stack.
* [`OP_HASH160`][op_hash160]{:#term-op-hash160}{:.term} consumes the item on the stack below it and returns with * [`OP_HASH160`][op_hash160]{:#term-op-hash160}{:.term} consumes the topmost item on the stack,
a RIPEMD-160(SHA256()) hash of that item. computes the RIPEMD160(SHA256()) hash of that item, and pushes that hash onto the stack.
* [`OP_EQUAL`][op_equal]{:#term-op-equal}{:.term} consumes the two items on the stack below it and returns * [`OP_EQUAL`][op_equal]{:#term-op-equal}{:.term} consumes the top two items on the stack, compares them, and
true if they are the same. Otherwise, it returns false. pushes true onto the stack if they are the same, false if not.
* [`OP_VERIFY`][op_verify]{:#term-op-verify}{:.term} consumes one value and returns nothing, but it will * [`OP_VERIFY`][op_verify]{:#term-op-verify}{:.term} consumes the topmost item on the stack.
terminate the script in failure if the value consumed is zero (false). If that item is zero (false) it terminates the script in failure.
* [`OP_EQUALVERIFY`][op_equalverify]{:#term-op-equalverify}{:.term} runs `OP_EQUAL` and then `OP_VERIFY` in sequence. * [`OP_EQUALVERIFY`][op_equalverify]{:#term-op-equalverify}{:.term} runs `OP_EQUAL` and then `OP_VERIFY` in sequence.
@ -39,14 +39,14 @@ The op codes used in the scriptPubKeys of standard transactions are:
the value (m) now at the top of the stack, and consumes that many of the value (m) now at the top of the stack, and consumes that many of
the next values (signatures) plus one extra value. Then it compares the next values (signatures) plus one extra value. Then it compares
each of public keys against each of the signatures looking for ECDSA each of public keys against each of the signatures looking for ECDSA
matches; if n of the public keys match signatures, it returns true. matches; if n of the public keys match signatures, it pushes true onto the stack.
Otherwise, it returns false. Otherwise, it pushes false.
The "one extra value" it consumes is the result of an off-by-one The "one extra value" it consumes is the result of an off-by-one
error in the Bitcoin Core implementation. This value is not used, so error in the Bitcoin Core implementation. This value is not used, so
scriptSigs prefix the signatures with a single OP_0 (0x00). scriptSigs prefix the signatures with a single OP_0 (0x00).
* [`OP_RETURN`][op_return]{:#term-op-return}{:.term} fails the script immediately when executed. * [`OP_RETURN`][op_return]{:#term-op-return}{:.term} terminates the script in failure when executed.
A complete list of OP codes can be found on the Bitcoin Wiki [Script A complete list of OP codes can be found on the Bitcoin Wiki [Script
Page][wiki script], with an authoritative list in the `opcodetype` enum Page][wiki script], with an authoritative list in the `opcodetype` enum