nimbus-eth1/nimbus/utils/era_helpers.nim

199 lines
5.9 KiB
Nim

# Nimbus
# Copyright (c) 2024 Status Research & Development GmbH
# Licensed under either of
# * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
# http://www.apache.org/licenses/LICENSE-2.0)
# * MIT license ([LICENSE-MIT](LICENSE-MIT) or
# http://opensource.org/licenses/MIT)
# at your option. This file may not be copied, modified, or distributed except
# according to those terms.
{.push raises: [].}
import
chronicles,
metrics,
std/[os, strutils],
stew/io2,
../config,
../common/common,
beacon_chain/era_db,
beacon_chain/networking/network_metadata,
beacon_chain/spec/[forks, helpers],
../beacon/payload_conv
proc latestEraFile*(eraDir: string, cfg: RuntimeConfig): Result[(string, Era), string] =
## Find the latest era file in the era directory.
var
latestEra = 0
latestEraFile = ""
try:
for kind, obj in walkDir eraDir:
let (_, name, _) = splitFile(obj)
let parts = name.split('-')
if parts.len() == 3 and parts[0] == cfg.CONFIG_NAME:
let era =
try:
parseBiggestInt(parts[1])
except ValueError:
return err("Invalid era number")
if era > latestEra:
latestEra = era
latestEraFile = obj
except OSError as e:
return err(e.msg)
if latestEraFile == "":
err("No valid era files found")
else:
ok((latestEraFile, Era(latestEra)))
proc loadHistoricalRootsFromEra*(
eraDir: string, cfg: RuntimeConfig
): Result[
(
HashList[Eth2Digest, Limit HISTORICAL_ROOTS_LIMIT],
HashList[HistoricalSummary, Limit HISTORICAL_ROOTS_LIMIT],
Slot,
),
string,
] =
## Load the historical_summaries from the latest era file.
let
(latestEraFile, latestEra) = ?latestEraFile(eraDir, cfg)
f = ?EraFile.open(latestEraFile)
slot = start_slot(latestEra)
var bytes: seq[byte]
?f.getStateSSZ(slot, bytes)
if bytes.len() == 0:
return err("State not found")
let state =
try:
newClone(readSszForkedHashedBeaconState(cfg, slot, bytes))
except SerializationError as exc:
return err("Unable to read state: " & exc.msg)
withState(state[]):
when consensusFork >= ConsensusFork.Capella:
return ok(
(
forkyState.data.historical_roots,
forkyState.data.historical_summaries,
slot + 8192,
)
)
else:
return ok(
(
forkyState.data.historical_roots,
HashList[HistoricalSummary, Limit HISTORICAL_ROOTS_LIMIT](),
slot + 8192,
)
)
proc getTxs*(txs: seq[bellatrix.Transaction]): seq[common.Transaction] =
var transactions = newSeqOfCap[common.Transaction](txs.len)
for tx in txs:
try:
transactions.add(rlp.decode(tx.asSeq(), common.Transaction))
except RlpError:
return @[]
return transactions
proc getWithdrawals*(x: seq[capella.Withdrawal]): seq[common.Withdrawal] =
var withdrawals = newSeqOfCap[common.Withdrawal](x.len)
for w in x:
withdrawals.add(
common.Withdrawal(
index: w.index,
validatorIndex: w.validator_index,
address: EthAddress(w.address.data),
amount: uint64(w.amount),
)
)
return withdrawals
proc getEthBlock(blck: ForkyTrustedBeaconBlock): Opt[EthBlock] =
## Convert a beacon block to an eth1 block.
const consensusFork = typeof(blck).kind
when consensusFork >= ConsensusFork.Bellatrix:
let
payload = blck.body.execution_payload
txs = getTxs(payload.transactions.asSeq())
ethWithdrawals =
when consensusFork >= ConsensusFork.Capella:
Opt.some(getWithdrawals(payload.withdrawals.asSeq()))
else:
Opt.none(seq[common.Withdrawal])
withdrawalRoot =
when consensusFork >= ConsensusFork.Capella:
Opt.some(calcWithdrawalsRoot(ethWithdrawals.get()))
else:
Opt.none(common.Hash256)
blobGasUsed =
when consensusFork >= ConsensusFork.Deneb:
Opt.some(payload.blob_gas_used)
else:
Opt.none(uint64)
excessBlobGas =
when consensusFork >= ConsensusFork.Deneb:
Opt.some(payload.excess_blob_gas)
else:
Opt.none(uint64)
parentBeaconBlockRoot =
when consensusFork >= ConsensusFork.Deneb:
Opt.some(blck.parent_root)
else:
Opt.none(common.Hash256)
header = BlockHeader(
parentHash: payload.parent_hash,
ommersHash: EMPTY_UNCLE_HASH,
coinbase: EthAddress(payload.fee_recipient.data),
stateRoot: payload.state_root,
txRoot: calcTxRoot(txs),
receiptsRoot: payload.receipts_root,
logsBloom: BloomFilter(payload.logs_bloom.data),
difficulty: 0.u256,
number: payload.block_number,
gasLimit: GasInt(payload.gas_limit),
gasUsed: GasInt(payload.gas_used),
timestamp: EthTime(payload.timestamp),
extraData: payload.extra_data.asSeq(),
mixHash: payload.prev_randao,
nonce: default(BlockNonce),
baseFeePerGas: Opt.some(payload.base_fee_per_gas),
withdrawalsRoot: withdrawalRoot,
blobGasUsed: blobGasUsed,
excessBlobGas: excessBlobGas,
parentBeaconBlockRoot: parentBeaconBlockRoot,
)
Opt.some EthBlock(
header: header, transactions: txs, uncles: @[], withdrawals: ethWithdrawals
)
else:
Opt.none(EthBlock)
proc getEthBlockFromEra*(
db: EraDB,
historical_roots: openArray[Eth2Digest],
historical_summaries: openArray[HistoricalSummary],
slot: Slot,
cfg: RuntimeConfig,
): Opt[EthBlock] =
let fork = cfg.consensusForkAtEpoch(slot.epoch)
fork.withConsensusFork:
type T = consensusFork.TrustedSignedBeaconBlock
var tmp = new T
# Pass in default Eth2Digest to avoid block root computation (it is not
# needed in this case)
tmp[] = db.getBlock(
historical_roots, historical_summaries, slot, Opt.some(default(Eth2Digest)), T
).valueOr:
return Opt.none(EthBlock)
getEthBlock(tmp[].message)