153 lines
4.4 KiB
Nim
153 lines
4.4 KiB
Nim
# Nimbus
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# Copyright (c) 2018-2023 Status Research & Development GmbH
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# Licensed under either of
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# * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE))
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# * MIT license ([LICENSE-MIT](LICENSE-MIT))
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# at your option.
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# This file may not be copied, modified, or distributed except according to
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# those terms.
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import
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pkg/[chronos,
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stew/results,
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chronicles,
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eth/keys],
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".."/[config,
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constants],
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"."/[
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chain,
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tx_pool,
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validate],
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"."/clique/[
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clique_desc,
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clique_cfg,
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clique_sealer],
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../utils/utils,
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../common/[common, context]
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type
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EngineState* = enum
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EngineStopped,
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EngineRunning,
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EnginePostMerge
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SealingEngineRef* = ref SealingEngineObj
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SealingEngineObj = object of RootObj
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state: EngineState
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engineLoop: Future[void]
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chain*: ChainRef
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ctx: EthContext
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signer: EthAddress
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txPool: TxPoolRef
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proc validateSealer*(conf: NimbusConf, ctx: EthContext, chain: ChainRef): Result[void, string] =
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if conf.engineSigner == ZERO_ADDRESS:
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return err("signer address should not zero, use --engine-signer to set signer address")
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let res = ctx.am.getAccount(conf.engineSigner)
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if res.isErr:
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return err("signer address not in registered accounts, use --import-key/account to register the account")
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let acc = res.get()
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if not acc.unlocked:
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return err("signer account not unlocked, please unlock it first via rpc/password file")
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let com = chain.com
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if com.consensus != ConsensusType.POA:
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return err("currently only PoA engine is supported")
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ok()
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proc generateBlock(engine: SealingEngineRef,
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outBlock: var EthBlock): Result[void, string] =
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outBlock = engine.txPool.ethBlock()
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if engine.chain.com.consensus == ConsensusType.POS:
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# Stop the block generator if we reach TTD
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engine.state = EnginePostMerge
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if engine.state != EnginePostMerge:
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# Post merge, Clique should not be executing
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let sealRes = engine.chain.clique.seal(outBlock)
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if sealRes.isErr:
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return err("error sealing block header: " & $sealRes.error)
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debug "generated block",
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blockNumber = outBlock.header.blockNumber,
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blockHash = blockHash(outBlock.header)
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ok()
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proc sealingLoop(engine: SealingEngineRef): Future[void] {.async.} =
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let clique = engine.chain.clique
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proc signerFunc(signer: EthAddress, message: openArray[byte]):
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Result[RawSignature, cstring] {.gcsafe.} =
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let
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hashData = keccakHash(message)
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ctx = engine.ctx
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acc = ctx.am.getAccount(signer).tryGet()
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rawSign = sign(acc.privateKey, SkMessage(hashData.data)).toRaw
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ok(rawSign)
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clique.authorize(engine.signer, signerFunc)
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# convert times.Duration to chronos.Duration
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let period = chronos.seconds(clique.cfg.period.int64)
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while engine.state == EngineRunning:
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# the sealing engine will tick every `cliquePeriod` seconds
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await sleepAsync(period)
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if engine.state != EngineRunning:
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break
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# deviation from 'correct' sealing engine:
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# - no queue for chain reorgs
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# - no async lock/guard against race with sync algo
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var blk: EthBlock
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let blkRes = engine.generateBlock(blk)
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if blkRes.isErr:
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error "sealing engine generateBlock error", msg=blkRes.error
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break
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let res = engine.chain.persistBlocks([blk.header], [
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BlockBody(transactions: blk.txs, uncles: blk.uncles)
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])
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if res == ValidationResult.Error:
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error "sealing engine: persistBlocks error"
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break
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discard engine.txPool.smartHead(blk.header) # add transactions update jobs
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info "block generated", number=blk.header.blockNumber
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proc new*(_: type SealingEngineRef,
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chain: ChainRef,
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ctx: EthContext,
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signer: EthAddress,
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txPool: TxPoolRef,
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initialState: EngineState): SealingEngineRef =
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SealingEngineRef(
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chain: chain,
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ctx: ctx,
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signer: signer,
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txPool: txPool,
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state: initialState
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)
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proc start*(engine: SealingEngineRef) =
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## Starts sealing engine.
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if engine.state == EngineStopped:
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engine.state = EngineRunning
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engine.engineLoop = sealingLoop(engine)
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info "sealing engine started"
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proc stop*(engine: SealingEngineRef) {.async.} =
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## Stop sealing engine from producing more blocks.
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if engine.state == EngineRunning:
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engine.state = EngineStopped
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await engine.engineLoop.cancelAndWait()
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info "sealing engine stopped"
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