mirrors/bitcoin
1
0
Fork 0
mirror of https://github.com/bitcoin/bitcoin.git synced 2025-01-19 05:45:05 +01:00
Code Issues Projects Releases Wiki Activity

Merge bitcoin/bitcoin#22863: policy: document dust threshold for Taproot outputs

Browse Source 
d873db7f8f policy: document we intentionally don't lower the dust threshold for Taproot (Antoine Poinsot)

Pull request description:

  Following discussions in #22779 .

ACKs for top commit:
  benthecarman:
    ACK d873db7f8f
  ariard:
    Code Review ACK d873db7
  theStack:
    ACK d873db7f8f

Tree-SHA512: 1f5d20dce767f8a74d57ece47a7f6b881741f508896131b8433600cccf9e4262892603b46521d1bb69d5c83b450f24a16731341072a471c1f2c9adad682af895
This commit is contained in:
W. J. van der Laan 2021-10-15 14:50:28 +02:00
commit 4dbba3bac7
No known key found for this signature in database
GPG Key ID: 1E4AED62986CD25D
1 changed files with 6 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
src/policy/policy.cpp
View File

@ -22,7 +22,7 @@ CAmount GetDustThreshold(const CTxOut& txout, const CFeeRate& dustRelayFeeIn)
// so dust is a spendable txout less than
// 182*dustRelayFee/1000 (in satoshis).
// 546 satoshis at the default rate of 3000 sat/kvB.
// A typical spendable segwit txout is 31 bytes big, and will
// A typical spendable segwit P2WPKH txout is 31 bytes big, and will
// need a CTxIn of at least 67 bytes to spend:
// so dust is a spendable txout less than
// 98*dustRelayFee/1000 (in satoshis).
@ -34,6 +34,11 @@ CAmount GetDustThreshold(const CTxOut& txout, const CFeeRate& dustRelayFeeIn)
int witnessversion = 0;
std::vector<unsigned char> witnessprogram;
// Note this computation is for spending a Segwit v0 P2WPKH output (a 33 bytes
// public key + an ECDSA signature). For Segwit v1 Taproot outputs the minimum
// satisfaction is lower (a single BIP340 signature) but this computation was
// kept to not further reduce the dust level.
// See discussion in https://github.com/bitcoin/bitcoin/pull/22779 for details.
if (txout.scriptPubKey.IsWitnessProgram(witnessversion, witnessprogram)) {
// sum the sizes of the parts of a transaction input
// with 75% segwit discount applied to the script size.