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Clare Laylock 2023-11-02 21:21:11 -04:00
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ch06_transactions.adoc
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@ -637,6 +637,7 @@ node implementations such as Bitcoin Core discourage the creation of
uneconomical outputs using policies that affect the relay and mining of uneconomical outputs using policies that affect the relay and mining of
unconfirmed transactions. unconfirmed transactions.
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The policies against relaying or mining transactions creating new The policies against relaying or mining transactions creating new
uneconomical outputs are called _dust_ policies, based on a metaphorical uneconomical outputs are called _dust_ policies, based on a metaphorical
comparison between outputs with very small values and particles with comparison between outputs with very small values and particles with
@ -798,7 +799,7 @@ transactions out of order:
A problem with this construction in the legacy transaction format is A problem with this construction in the legacy transaction format is
that every field, including the input script field that contains that every field, including the input script field that contains
signatures, is used to derive a transaction's identifier (txid). The signatures, is used to derive a [.keep-together]#transaction's# identifier (txid). The
txid for Tx~0~ is part of the input's outpoint in Tx~1~. That means txid for Tx~0~ is part of the input's outpoint in Tx~1~. That means
there's no way for Alice and Bob to construct Tx~1~ until both there's no way for Alice and Bob to construct Tx~1~ until both
signatures for Tx~0~ are known--but if they know the signatures for signatures for Tx~0~ are known--but if they know the signatures for
@ -957,6 +958,7 @@ template must only be spent with an empty input script. Notice the
difference here: old nodes _allow_ an empty input script; new nodes difference here: old nodes _allow_ an empty input script; new nodes
_require_ an empty input script. _require_ an empty input script.
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An empty input script keeps witnesses from affecting the txid, eliminating An empty input script keeps witnesses from affecting the txid, eliminating
circular dependencies, third-party transaction malleability, and circular dependencies, third-party transaction malleability, and
second-party transaction malleability. But, with no ability to put second-party transaction malleability. But, with no ability to put
@ -1238,6 +1240,7 @@ creation of uneconomical outputs as described in
</table> </table>
++++ ++++
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We can verify our weight calculation by getting the total for Alice's We can verify our weight calculation by getting the total for Alice's
transaction from Bitcoin Core: transaction from Bitcoin Core: