bitcoin/bips
1
0
Fork 0
mirror of https://github.com/bitcoin/bips.git synced 2025-06-30 12:42:43 +00:00
Code Issues Releases Wiki Activity

443: add paragraph on fee management

Browse Source
This commit is contained in:
Salvatore Ingala 2025-06-22 20:27:23 +02:00
parent ff5703c755
commit e4e2b7ccd1
No known key found for this signature in database
GPG Key ID: 74060FF81B33E4F8
1 changed files with 12 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
bip-0443.mediawiki
View File

@ -129,6 +129,18 @@ Note that the ''deduct'' semantic does not allow to check the exact amount of it
a scheme similar to figure 3 or 4 above, amounts should be constrained either with a signature, or with future
introspection opcodes that allow fixing the amount. In lack of that, amounts would be malleable.
=== Paying fees ===
Since the amount-checking semantics of <code>OP_CHECKCONTRACTVERIFY</code> are designed to preserve the entire input
amount across one or more outputs, transaction fees must be paid exogenously. This can be achieved by adding an extra
input to the transaction, by using an anchor output, or with other future mechanisms.
The ''ignore'' amount mode is not a safe mechanism for paying endogenous fees. An output checked with this mode has no
amount constraint, which would allow a miner to claim the entire value of that input. This mode is included for forward
compatibility with potential future soft forks that may introduce other amount-related logic that is compatible with
<code>OP_CHECKCONTRACTVERIFY</code>'s script checks.
== Specification ==
The tapscript opcode <code>OP_SUCCESS187</code> (<code>0xbb</code>) is constrained with new rules to implement