Chainparams update for 23.x by laanwj · Pull Request #24418 · bitcoin/bitcoin

laanwj · 2022-02-22T15:43:05Z

Update chain parameters for upcoming major release. See doc/release-process.md for review instructions.

m_assumed_blockchain_size, m_assumed_chain_state_size:

bitcoin$ du -h .
105M    ./blocks/index
415G    ./blocks
4.5G    ./chainstate
420G    .
bitcoin$ python3
Python 3.9.10 (main, Jan 16 2022, 17:12:18)
[GCC 11.2.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> 420 * 1.1
462.00000000000006
>>> 5 * 1.1
5.5

chainTxData:

cli getchaintxstats 4096 000000000000000000052d314a259755ca65944e68df6b12a067ea8f1f5a7091
{
  "time": 1645542140,
  "txcount": 712531200,
  "window_final_block_hash": "000000000000000000052d314a259755ca65944e68df6b12a067ea8f1f5a7091",
  "window_final_block_height": 724466,
  "window_block_count": 4096,
  "window_tx_count": 6950257,
  "window_interval": 2404071,
  "txrate": 2.891036496010309
}

nMinimumChainWork, defaultAssumeValid:

$ cli getblockhash 724466 # was two from the tip at the time
000000000000000000052d314a259755ca65944e68df6b12a067ea8f1f5a7091
$ cli getblockheader 000000000000000000052d314a259755ca65944e68df6b12a067ea8f1f5a7091
{
  "hash": "000000000000000000052d314a259755ca65944e68df6b12a067ea8f1f5a7091",
  "confirmations": 3,
  "height": 724466,
  "version": 939515908,
  "versionHex": "37ffe004",
  "merkleroot": "35a08d9647972e7c3ec39ee7f4ab434f03445de7c446a4d1acc1254b4546bbbe",
  "time": 1645542140,
  "mediantime": 1645539567,
  "nonce": 188699556,
  "bits": "170a1078",
  "difficulty": 27967152532434.23,
  "chainwork": "00000000000000000000000000000000000000002927cdceccbd5209e81e80db",
  "nTx": 1948,
  "previousblockhash": "000000000000000000075e26c23c2ecec4e34699411ccd712ff6f2d252f65a78",
  "nextblockhash": "0000000000000000000905369cd69f68323e3e8da2933a78bea0b2cdb8baa89f"
}

DrahtBot · 2022-02-22T16:05:59Z

The following sections might be updated with supplementary metadata relevant to reviewers and maintainers.

Conflicts

Reviewers, this pull request conflicts with the following ones:

#21702 (Implement BIP-119 Validation (CheckTemplateVerify) by JeremyRubin)

If you consider this pull request important, please also help to review the conflicting pull requests. Ideally, start with the one that should be merged first.

jonatack · 2022-02-22T22:50:18Z

src/chainparams.cpp

d8a8b54 update ChainTxData for testnet and signet too? (they were last updated in eeddd1c)

same for nMinimumChainWork and defaultAssumeValid

(side note, I have 41.4 GiB of /indexes on mainnet (4 GiB on testnet), wonder if that space ought to be taken into account somewhere)

~~Could do it seperately. I don't have any testnet node at the moment, mainnet is definitely the one requiring the more thorough review/testing.~~
Edit: all three networks are now covered

(side note, I have 41.4 GiB of /indexes on mainnet (4 GiB on testnet), wonder if that space ought to be taken into account somewhere)

Good point, but I'm simply following the release process here. It could be updated to include indexes, but I don't have any indexes myself, I guess we assume a default setup without them? That makes some sense for new users (remember, this is for the GUI).

laanwj · 2022-02-23T15:04:40Z

src/chainparams.cpp

Does this need to be 4096 blocks? The reason I changed this to 4320 is that it's what getchaintxstats returns by default, but it seems we've always explicitly used 4096.

Edit: updated to 4096 just to be sure.

I wonder why 28 days (4096) was used instead of the getchaintxstats default of 30 (4320).

laanwj · 2022-02-23T15:18:18Z

Changed to getchaintxstats 4096 (instead of 4320) because that's what we've always done.

sdaftuar · 2022-02-23T15:18:19Z

My testnet data (I just used the current tip -- should I go back a few weeks?)

# du -h testnet3
335M	testnet3/blocks/index
29G	testnet3/blocks
1.4G	testnet3/chainstate
59G	testnet3

# # bin/bitcoin-cli -testnet getchaintxstats 4096 00000000d18cfe81cbeea665076807789bd8f831d557632e635bc6e3c003069e
{
  "time": 1645635119,
  "txcount": 62226341,
  "window_final_block_hash": "00000000d18cfe81cbeea665076807789bd8f831d557632e635bc6e3c003069e",
  "window_final_block_height": 2163398,
  "window_block_count": 4096,
  "window_tx_count": 44718,
  "window_interval": 579399,
  "txrate": 0.07717997442177152
}

# bin/bitcoin-cli -testnet getblockhash 2163398
00000000d18cfe81cbeea665076807789bd8f831d557632e635bc6e3c003069e

# bin/bitcoin-cli -testnet getblockheader 00000000d18cfe81cbeea665076807789bd8f831d557632e635bc6e3c003069e
{
  "hash": "00000000d18cfe81cbeea665076807789bd8f831d557632e635bc6e3c003069e",
  "confirmations": 1,
  "height": 2163398,
  "version": 536870912,
  "versionHex": "20000000",
  "merkleroot": "098571ff08c01435151059a176aa8cecb3c374f7803322b7a4e61202aaf225fd",
  "time": 1645635119,
  "mediantime": 1645632662,
  "nonce": 2157408116,
  "bits": "1d00ffff",
  "difficulty": 1,
  "chainwork": "0000000000000000000000000000000000000000000006480a8f8cd1a50d40b4",
  "nTx": 2,
  "previousblockhash": "0000000077b52bb2803f93dfc079c23904f5c5f0a68d693d44f5a4195e135670"
}

Edit: going back 20000 blocks:

# bin/bitcoin-cli -testnet getblockhash 2143398
00000000000163cfb1f97c4e4098a3692c8053ad9cab5ad9c86b338b5c00b8b7
# bin/bitcoin-cli -testnet getblockheader 00000000000163cfb1f97c4e4098a3692c8053ad9cab5ad9c86b338b5c00b8b7
{
  "hash": "00000000000163cfb1f97c4e4098a3692c8053ad9cab5ad9c86b338b5c00b8b7",
  "confirmations": 20002,
  "height": 2143398,
  "version": 536870916,
  "versionHex": "20000004",
  "merkleroot": "860811ef213234164a47bbdfc412c698fae84a2f9cf045983c7ada7acda6e894",
  "time": 1644883096,
  "mediantime": 1644883056,
  "nonce": 3371479007,
  "bits": "1c32b240",
  "difficulty": 5.049602219097336,
  "chainwork": "00000000000000000000000000000000000000000000064728c7be6fe4b2f961",
  "nTx": 1,
  "previousblockhash": "00000000000151e849c468a1861b4683f81fccdbd84b555ccba31ca34212c6c5",
  "nextblockhash": "000000001b45803f50e27a283c8575bf159add02c971f9602608d54d688c7798"
}

laanwj · 2022-02-23T15:22:18Z

@sdaftuar Thanks!

My testnet data (I just used the current tip -- should I go back a few weeks?)

The release process mentions "Testnet should be set some tens of thousands back from the tip due to reorgs there" for nMinimumChainWork and defaultAssumeValid specifically, not the other stats. I don't know how relevant this still is.

ghost · 2022-02-23T15:36:49Z

Testnet

m_assumed_blockchain_size and m_assumed_chain_state_size

du | Sort-Object -Property "Size(MB)" -Descending

Name                 Size(MB)
----                 --------
blocks               29594.67
indexes               3608.49
chainstate            1408.83
tor                     10.44
debug.old.log           10.03
debug.log                9.26
wallet.dat                2.2
database                    2
peers.dat                0.48
fee_estimates.dat        0.24

chainTxData

getchaintxstats

{
  "time": 1645636320,
  "txcount": 62226436,
  "window_final_block_hash": "00000000cdec5e424755bc1c05d7c410816e67df14112b383a642823f8efc647",
  "window_final_block_height": 2163399,
  "window_block_count": 4320,
  "window_tx_count": 45780,
  "window_interval": 592666,
  "txrate": 0.07724418137703191
}

nMinimumChainWork and defaultAssumeValid

getblockhash 2113399

00000000004d479629eed9a48bb26018e9ee2cd96c27e1671b5e1912af50b55a

getblockheader 00000000004d479629eed9a48bb26018e9ee2cd96c27e1671b5e1912af50b55a

{
  "hash": "00000000004d479629eed9a48bb26018e9ee2cd96c27e1671b5e1912af50b55a",
  "confirmations": 50001,
  "height": 2113399,
  "version": 549453824,
  "versionHex": "20c00000",
  "merkleroot": "58f843b066e6a924ba5d9b09486547b3aea5dc5ae26af7c8b7598c7cb729d769",
  "time": 1639108042,
  "mediantime": 1639108033,
  "nonce": 1736346435,
  "bits": "1c03fffc",
  "difficulty": 64,
  "chainwork": "00000000000000000000000000000000000000000000061eff7f8ad70d987929",
  "nTx": 1,
  "previousblockhash": "0000000000a9f4e47cfb6984eee25f146123db1a752eeed428417e369a55bc69",
  "nextblockhash": "00000000007ad25fa0d4835e2bc0cce5272933a7438262a7d616874d3d76732a"
}

laanwj · 2022-02-23T15:51:15Z

Signet:

$ du -h
56M     ./chainstate
4.0K    ./wallets
13M     ./blocks/index
388M    ./blocks
453M    .

$ src/bitcoin-cli -signet getchaintxstats 4096
{
  "time": 1645631279,
  "txcount": 1257429,
  "window_final_block_hash": "0000003d9144c56ac110ae04a0c271a0acce2f14f426b39fdf0d938c96d2eb09",
  "window_final_block_height": 78789,
  "window_block_count": 4096,
  "window_tx_count": 338057,
  "window_interval": 2432697,
  "txrate": 0.1389638742514995
}

$ src/bitcoin-cli -signet getblockhash 78788
00000112852484b5fe3451572368f93cfd2723279af3464e478aee35115256ef
$ src/bitcoin-cli -signet getblockheader 00000112852484b5fe3451572368f93cfd2723279af3464e478aee35115256ef
{
  "hash": "00000112852484b5fe3451572368f93cfd2723279af3464e478aee35115256ef",
  "confirmations": 2,
  "height": 78788,
  "version": 536870912,
  "versionHex": "20000000",
  "merkleroot": "1ab0ba555287a8e81d9a2917d92d7c4a985f6cf455ae155dadaa9b66c80719dc",
  "time": 1645631237,
  "mediantime": 1645624966,
  "nonce": 23153229,
  "bits": "1e015f73",
  "difficulty": 0.002845317866312478,
  "chainwork": "000000000000000000000000000000000000000000000000000000de26b0e471",
  "nTx": 8,
  "previousblockhash": "000000b34d7f0abb0f4b15c59f7fc8d1c646322189cd0450fdbdbe74db75916b",
  "nextblockhash": "0000003d9144c56ac110ae04a0c271a0acce2f14f426b39fdf0d938c96d2eb09"
}

sdaftuar · 2022-02-23T16:24:30Z

src/chainparams.cpp

ACK 000000000000000000052d314a259755ca65944e68df6b12a067ea8f1f5a7091 (assume valid block hash)

achow101

ACK 4f87a2d32f2018406f4a70d5256d635ba51696a9

src/chainparams.cpp

jamesob · 2022-02-23T21:21:46Z

ACK 4f87a2d

Only checked mainnet:

% rpc getblockhash 724466
000000000000000000052d314a259755ca65944e68df6b12a067ea8f1f5a7091

% rpc getchaintxstats 4096 000000000000000000052d314a259755ca65944e68df6b12a067ea8f1f5a7091
{
  "time": 1645542140,
  "txcount": 712531200,
  "window_final_block_hash": "000000000000000000052d314a259755ca65944e68df6b12a067ea8f1f5a7091",
  "window_final_block_height": 724466,
  "window_block_count": 4096,
  "window_tx_count": 6950257,
  "window_interval": 2404071,
  "txrate": 2.891036496010309
}

laanwj · 2022-02-24T11:36:49Z

I think the most important thing still to test here is, especially for mainnet's nMinimumChainWork and defaultAssumeValid update:

This update should be reviewed with a reindex-chainstate with assumevalid=0 to catch any defect that causes rejection of blocks in the past history.

I did not check this, not sure anyone else did.

jonatack · 2022-02-24T11:55:47Z

I think the most important thing still to test here is, especially for mainnet's nMinimumChainWork and defaultAssumeValid update:

This update should be reviewed with a reindex-chainstate with assumevalid=0 to catch any defect that causes rejection of blocks in the past history.

Launched it. Might take awhile.

laanwj · 2022-02-24T11:59:09Z

Launched it. Might take awhile.

Thanks!

Edit: re-pushed with the testnet assumed blockchain size change undone.

- `m_assumed_chain_state_size` doesn't seem to need to be changed for mainnet. - No change needed for testnet/signet. Co-authored-by: Suhas Daftuar <[email protected]>

Sjors

ACK dbbacb2ac86a996c219477c5797e365112612608 for mainnet and signet, but not testnet

Why don't we use the same block for assume-valid and chainTxData on testnet and signet?

I verified the above values on an existing node, did not do a fresh IBD.

src/chainparams.cpp

Co-authored-by: Suhas Daftuar <[email protected]>

Sjors · 2022-02-24T15:38:36Z

ACK dca693e

PGP signature

One way to fetch my key:

gpg -v --auto-key-locate=clear,wkd --locate-key [email protected]

ghost

ACK dca693e

Testnet only (with and without assumevalid re-index-chainstate)

Agree with @Sjors that we could use assumevalid block for ChainTxData

darosior

ACK dca693e -- only checked mainnet (on muliple nodes). Didn't do a reindex.

PGP signature

achow101 · 2022-02-24T17:56:44Z

ACK dca693e

jonatack · 2022-02-24T21:54:17Z

src/chainparams.cpp

-            consensus.nMinimumChainWork = uint256S("0x0000000000000000000000000000000000000000000000000000008546553c03");
-            consensus.defaultAssumeValid = uint256S("0x000000187d4440e5bff91488b700a140441e089a8aaea707414982460edbfe54"); // 47200
+            consensus.nMinimumChainWork = uint256S("0x000000000000000000000000000000000000000000000000000000de26b0e471");
+            consensus.defaultAssumeValid = uint256S("0x00000112852484b5fe3451572368f93cfd2723279af3464e478aee35115256ef"); // 78788


I see the same values for signet with reindex-chainstate and assumevalid=0

$ ./src/bitcoin-cli -signet getblockhash 78788 00000112852484b5fe3451572368f93cfd2723279af3464e478aee35115256ef $ ./src/bitcoin-cli -signet getblockheader 00000112852484b5fe3451572368f93cfd2723279af3464e478aee35115256ef { "hash": "00000112852484b5fe3451572368f93cfd2723279af3464e478aee35115256ef", "confirmations": 166, "height": 78788, "version": 536870912, "versionHex": "20000000", "merkleroot": "1ab0ba555287a8e81d9a2917d92d7c4a985f6cf455ae155dadaa9b66c80719dc", "time": 1645631237, "mediantime": 1645624966, "nonce": 23153229, "bits": "1e015f73", "difficulty": 0.002845317866312478, "chainwork": "000000000000000000000000000000000000000000000000000000de26b0e471", "nTx": 8, "previousblockhash": "000000b34d7f0abb0f4b15c59f7fc8d1c646322189cd0450fdbdbe74db75916b", "nextblockhash": "0000003d9144c56ac110ae04a0c271a0acce2f14f426b39fdf0d938c96d2eb09" }

jonatack · 2022-02-28T11:26:04Z

Launched it. Might take awhile.

Thanks!

FWIW after 4 days, I am only at 33% verification progress on mainnet.

Rspigler · 2022-03-06T05:01:11Z

Post-merge ACK with assumevalid=0

m_assumed_blockchain_size, m_assumed_chain_state_size

/.bitcoin$ du -h
105M ./blocks/index
418G ./blocks
4.5G ./chainstate
44K ./v22 Descriptor Compiled Tested
35G ./indexes/txindex
123M ./indexes/coinstats/db
123M ./indexes/coinstats
81M ./indexes/blockfilter/basic/db
7.3G ./indexes/blockfilter/basic
7.3G ./indexes/blockfilter
42G ./indexes
464G .
user@Bitcoin:~/.bitcoin$ python3
Python 3.9.2 (default, Feb 28 2021, 17:03:44)
[GCC 10.2.1 20210110] on linux
Type "help", "copyright", "credits" or "license" for more information.
464 * 1.1
510.40000000000003
5 * 1.1
5.5

I calculated 510G instead of your 460G because I included the optional indexes (txindex, coinstats, and blockfilter). Might want to change in #24424

chainTxData

getchaintxstats 4096 000000000000000000052d314a259755ca65944e68df6b12a067ea8f1f5a7091
{
"time": 1645542140,
"txcount": 712531200,
"window_final_block_hash": "000000000000000000052d314a259755ca65944e68df6b12a067ea8f1f5a7091",
"window_final_block_height": 724466,
"window_block_count": 4096,
"window_tx_count": 6950257,
"window_interval": 2404071,
"txrate": 2.891036496010309
}

✔️

nMinimumChainWork, defaultAssumeValid

getblockhash 724466
000000000000000000052d314a259755ca65944e68df6b12a067ea8f1f5a7091
getblockheader 000000000000000000052d314a259755ca65944e68df6b12a067ea8f1f5a7091
{
"hash": "000000000000000000052d314a259755ca65944e68df6b12a067ea8f1f5a7091",
"confirmations": 1618,
"height": 724466,
"version": 939515908,
"versionHex": "37ffe004",
"merkleroot": "35a08d9647972e7c3ec39ee7f4ab434f03445de7c446a4d1acc1254b4546bbbe",
"time": 1645542140,
"mediantime": 1645539567,
"nonce": 188699556,
"bits": "170a1078",
"difficulty": 27967152532434.23,
"chainwork": "00000000000000000000000000000000000000002927cdceccbd5209e81e80db",
"nTx": 1948,
"previousblockhash": "000000000000000000075e26c23c2ecec4e34699411ccd712ff6f2d252f65a78",
"nextblockhash": "0000000000000000000905369cd69f68323e3e8da2933a78bea0b2cdb8baa89f"
}

✔️

jonatack

I think the most important thing still to test here is, especially for mainnet's nMinimumChainWork and defaultAssumeValid update:

This update should be reviewed with a reindex-chainstate with assumevalid=0 to catch any defect that causes rejection of blocks in the past history.

After 11 days my node completed reindex-chainstate with assumevalid=0 on mainnet and confirms the same result as this pull.

767d825 Update chainparams for 24.0 release (Janna) Pull request description: Update chain parameters for upcoming major release. See [doc/release-process.md](https://github.com/bitcoin/bitcoin/blob/master/doc/release-process.md) and bitcoin#24418 for review instructions. fixes bitcoin#25921 ACKs for top commit: Sjors: tACK 767d825 achow101: utACK 767d825 Tree-SHA512: 153390203c76c981cc41629a27ec3e52fec089c7ce6edba3dd4d77c875c7d8afcae64be2bd9bc8af73f70c2dc0a08666f2986ac82c9fd536b0fded10fd8dec3d

laanwj added the Utils/log/libs label Feb 22, 2022

laanwj added this to the 23.0 milestone Feb 22, 2022

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Release schedule for 23.0 #22969

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ACK 000000000000000000052d314a259755ca65944e68df6b12a067ea8f1f5a7091 (assume valid block hash)

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Implement BIP-119 Validation (CheckTemplateVerify) #21702

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Update m_assumed_* chain parameters for 23.x

37282dc

- `m_assumed_chain_state_size` doesn't seem to need to be changed for mainnet. - No change needed for testnet/signet. Co-authored-by: Suhas Daftuar <[email protected]>

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doc: release process chainparams updates #24424

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laanwj and others added 2 commits February 24, 2022 16:19

Update chainTxData for 23.x

85e71a3

Co-authored-by: Suhas Daftuar <[email protected]>

Update nMinimumChainWork, defaultAssumeValid for 23.x

dca693e

Co-authored-by: Suhas Daftuar <[email protected]>

laanwj force-pushed the 2022-02-chainparams-update branch from dbbacb2 to dca693e Compare February 24, 2022 15:19

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Update chainparams pre 24.0 branch-off #25921

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ux3257 mentioned this pull request Aug 28, 2022

Update chainparams for 24.0 release #25946

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Testnet

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