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| author | Luke-Jr <luke_github1@dashjr.org> | 2016-06-01 17:57:05 +0000 |
|---|---|---|
| committer | Luke-Jr <luke_github1@dashjr.org> | 2016-06-01 17:57:05 +0000 |
| commit | c917abe394753b5111f069fd7be86ca77c032acb (patch) | |
| tree | e83c82655a659358c7786bb2fef2cd7c77c2ad50 /bip-0145.mediawiki | |
| parent | 55ecc6fd38c8e90100463fb4df767be8896f716b (diff) | |
| parent | 8324bc512e835f4ff16000ab1dbe7f55e8d110ee (diff) | |
| download | bips-c917abe394753b5111f069fd7be86ca77c032acb.tar.xz | |
Merge pull request #365 from luke-jr/segwit_gbt_updates_20160330
BIP 141 and 145: GBT updates for SegWit
Diffstat (limited to 'bip-0145.mediawiki')
| -rw-r--r-- | bip-0145.mediawiki | 17 |
1 files changed, 11 insertions, 6 deletions
diff --git a/bip-0145.mediawiki b/bip-0145.mediawiki index a4528c5..b04c9e6 100644 --- a/bip-0145.mediawiki +++ b/bip-0145.mediawiki @@ -15,7 +15,7 @@ This BIP describes modifications to the getblocktemplate JSON-RPC call ([[bip-00 ===Block Template=== -The template Object is revised to include these keys: +The template Object is revised to include a new key: {| class="wikitable" !colspan=4| template @@ -23,12 +23,12 @@ The template Object is revised to include these keys: ! Key !! Required !! Type !! Description |- | costlimit || No || Number || total cost allowed in blocks -|- -| sigoplimit || No || Number || total sigop cost allowed in blocks divided by 4 -|- -| version || Yes || Number || block version; clients MUST understand the implications of the version they use (eg, comply with [[bip-0141.mediawiki|BIP 141]] for version 5) |} +The '!' rule prefix MUST be enabled on the "segwit" rule for templates including transactions with witness data. +In particular, note that even if the client's "rules" list lacks "segwit", server MAY support old miners by producing a witness-free template and omitting the '!' rule prefix for "segwit" in the template's "rules" list. +If the GBT server does not support producing witness-free templates after its activation, it must also use the '!' rule prefix in the "vbavailable" list prior to activation. + ====Transactions Object Format==== The Objects listed in the response's "transactions" key is revised to include these keys: @@ -45,7 +45,11 @@ The Objects listed in the response's "transactions" key is revised to include th | hash || String || reversed hash of complete transaction (with witness data included) encoded in hexadecimal |} -Transactions with witness data may only be included if the template's block version is at least 5. +Transactions with witness data may only be included if the template's "rules" list (see [[bip-0009.mediawiki#getblocktemplate_changes|BIP 9]]) includes "segwit". + +===Sigops=== + +For templates with "segwit" enabled as a rule, the "sigoplimit" and "sigops" keys must use the new values as calculated in [[bip-0141.mediawiki#Sigops|BIP 141]]. ===Block Assembly with Witness Transactions=== @@ -87,6 +91,7 @@ Why shouldn't the server simply add the commitment upfront in the "coinbasetxn", * [https://github.com/bitcoin/bitcoin/pull/7404/files Bitcoin Core] ==See Also== +* [[bip-0009.mediawiki|BIP 9: Version bits with timeout and delay]] * [[bip-0022.mediawiki|BIP 22: getblocktemplate - Fundamentals]] * [[bip-0023.mediawiki|BIP 23: getblocktemplate - Pooled Mining]] * [[bip-0141.mediawiki|BIP 141: Segregated Witness (Consensus layer)]] |