Update chainparams for 25.x #27223

Update chain parameters for upcoming major release. See doc/release-process.md for review instructions. Followed instructions from #24418 closely as well.

• m_assumed_blockchain_size, m_assumed_chain_state_size:

mainnet

.bitcoin$ du -h --exclude=signet --exclude=testnet3 .
0       ./wallets
117M    ./blocks/index
489G    ./blocks
4.9G    ./chainstate
494G    .
.bitcoin$ python3
Python 3.11.1 (main, Jan  6 2023, 00:00:00) [GCC 12.2.1 20221121 (Red Hat 12.2.1-4)] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> 494*1.1
543.4000000000001
>>> 5*1.1
5.5

testnet3 (no changes needed to params)

.bitcoin$ du -h testnet3/
0       testnet3/wallets
648M    testnet3/blocks/index
31G     testnet3/blocks
1.4G    testnet3/chainstate
33G     testnet3/
.bitcoin$ python3
Python 3.11.1 (main, Jan  6 2023, 00:00:00) [GCC 12.2.1 20221121 (Red Hat 12.2.1-4)] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> 33*1.1
36.300000000000004
>>> 1.4*1.1
1.5

signet (no changes needed to params)

.bitcoin$ du -h signet/
0       signet/wallets
19M     signet/blocks/index
714M    signet/blocks
16K     signet/chainstate
755M    signet/

• chainTxData:

mainnet

$ bitcoin-cli getbestblockhash
00000000000000000001ab5cdb8f56ebc12419a1c12a528f576c535e976ae5e9

$ bitcoin-cli getchaintxstats 4096 00000000000000000001ab5cdb8f56ebc12419a1c12a528f576c535e976ae5e9
{
  "time": 1678203665,
  "txcount": 811834437,
  "window_final_block_hash": "00000000000000000001ab5cdb8f56ebc12419a1c12a528f576c535e976ae5e9",
  "window_final_block_height": 779756,
  "window_block_count": 4096,
  "window_tx_count": 8082254,
  "window_interval": 2295173,
  "txrate": 3.521413854206197
}

testnet

bitcoin-cli -testnet getbestblockhash
0000000000000011687aa6730b65137ca2549024b71bfda69d9eaf5eb7336749[

bitcoin-cli -testnet getchaintxstats 4096 0000000000000011687aa6730b65137ca2549024b71bfda69d9eaf5eb7336749
{
  "time": 1678204040,
  "txcount": 65041246,
  "window_final_block_hash": "0000000000000011687aa6730b65137ca2549024b71bfda69d9eaf5eb7336749",
  "window_final_block_height": 2423291,
  "window_block_count": 4096,
  "window_tx_count": 166030,
  "window_interval": 2434181,
  "txrate": 0.06820774626044654
}

signet

$ bitcoin-cli -signet getbestblockhash
0000001681c52f68f3b148a931574d23a54153231d4a6a0161799950e2453d97

$ bitcoin-cli -signet getchaintxstats 4096 0000001681c52f68f3b148a931574d23a54153231d4a6a0161799950e2453d97
{
  "time": 1678203585,
  "txcount": 2207891,
  "window_final_block_hash": "0000001681c52f68f3b148a931574d23a54153231d4a6a0161799950e2453d97",
  "window_final_block_height": 133021,
  "window_block_count": 4096,
  "window_tx_count": 18193,
  "window_interval": 2559149,
  "txrate": 0.007109003813377025
}

• nMinimumChainWork, defaultAssumeValid:

mainnet

$ bitcoin-cli getblockheader 00000000000000000001ab5cdb8f56ebc12419a1c12a528f576c535e976ae5e9
{
  "hash": "00000000000000000001ab5cdb8f56ebc12419a1c12a528f576c535e976ae5e9",
  "confirmations": 2,
  "height": 779756,
  "version": 722239488,
  "versionHex": "2b0c8000",
  "merkleroot": "12b126d43ec53fc50c3e5bd38d0849f765463be5ba0f3b113a837acc3dc9c73c",
  "time": 1678203665,
  "mediantime": 1678201388,
  "nonce": 1118234730,
  "bits": "170689a3",
  "difficulty": 43053844193928.45,
  "chainwork": "00000000000000000000000000000000000000004200315292c8bdc13e546bdc",
  "nTx": 3502,
  "previousblockhash": "00000000000000000000f94f67e1da0927aa6c1327953513841ab9dbf4e221a6",
  "nextblockhash": "000000000000000000060227179ffe953752753c2fc4e81b48f576227bc556bf"
}

testnet

$ bitcoin-cli -testnet getblockheader 0000000000000011687aa6730b65137ca2549024b71bfda69d9eaf5eb7336749
{
  "hash": "0000000000000011687aa6730b65137ca2549024b71bfda69d9eaf5eb7336749",
  "confirmations": 1,
  "height": 2423291,
  "version": 538968064,
  "versionHex": "20200000",
  "merkleroot": "737a77e585b97bfb118fe55ba23a80e47da6798c58800c7824a061cb5f96fc7b",
  "time": 1678204040,
  "mediantime": 1678201426,
  "nonce": 2256300948,
  "bits": "192a0b9d",
  "difficulty": 102149233.8892645,
  "chainwork": "0000000000000000000000000000000000000000000009187b7c3b56dbc42a6f",
  "nTx": 53,
  "previousblockhash": "00000000000000137f3c43f8d2da8028c441d61717146786ca3ed3e203ad2e17"
}

signet

$ bitcoin-cli -signet getblockheader 0000001681c52f68f3b148a931574d23a54153231d4a6a0161799950e2453d97
{
  "hash": "0000001681c52f68f3b148a931574d23a54153231d4a6a0161799950e2453d97",
  "confirmations": 1,
  "height": 133021,
  "version": 536870912,
  "versionHex": "20000000",
  "merkleroot": "93393537b960a7f66952ac890d28edf8544ad03ef5c31d75a829c849e424bae8",
  "time": 1678203585,
  "mediantime": 1678201021,
  "nonce": 18855356,
  "bits": "1e01562c",
  "difficulty": 0.002922463283140783,
  "chainwork": "0000000000000000000000000000000000000000000000000000017aeaa97dea",
  "nTx": 1,
  "previousblockhash": "00000120da11e3c849cbca953bb92f5b24539ad9a8476217f82b7633a5bbe9b1"
}

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Reviews

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Conflicts

Reviewers, this pull request conflicts with the following ones:

• #26857 (OP_VAULT draft by jamesob)
• #26201 (Remove Taproot activation height by Sjors)
• #26177 (refactor / kernel: Move non-gArgs chainparams functionality to kernel by TheCharlatan)

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.

Might have jumped the gun on this. Says "Before branch-off"

Might have jumped the gun on this.

Yea, it's a bit too early to be doing this. See #26549.

Closing for now, will reopen closer to branch off

Done in #27482 (added you as co-author).