463 lines
16 KiB
Nim
463 lines
16 KiB
Nim
# beacon_chain
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# Copyright (c) 2018-2024 Status Research & Development GmbH
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# Licensed and distributed under either of
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# * MIT license (license terms in the root directory or at https://opensource.org/licenses/MIT).
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# * Apache v2 license (license terms in the root directory or at https://www.apache.org/licenses/LICENSE-2.0).
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# at your option. This file may not be copied, modified, or distributed except according to those terms.
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{.push raises: [].}
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import
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std/os,
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stew/[byteutils, objects], stew/shims/macros, nimcrypto/hash,
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web3/[conversions],
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web3/primitives as web3types,
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chronicles,
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eth/common/eth_types_json_serialization,
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../spec/[eth2_ssz_serialization, forks]
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from std/sequtils import deduplicate, filterIt, mapIt
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from std/strutils import
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escape, parseBiggestUInt, replace, splitLines, startsWith, strip,
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toLowerAscii
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# TODO(zah):
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# We can compress the embedded states with snappy before embedding them here.
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# ATTENTION! This file is intentionally avoiding the Nim `/` operator for
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# constructing paths. The standard operator is relying the `DirSep` constant
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# which depends on the selected target OS (when doing cross-compilation), so
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# the compile-time manipulation of paths performed here will break (e.g. when
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# cross-compiling for Windows from Linux)
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#
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# Nim seems to need a more general solution for detecting the host OS during
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# compilation, so a host OS specific separator can be used when deriving paths
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# from `currentSourcePath`.
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export
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web3types, conversions, RuntimeConfig
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const
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vendorDir = currentSourcePath.parentDir.replace('\\', '/') & "/../../vendor"
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incbinEnabled* = sizeof(pointer) == 8
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type
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Eth1BlockHash* = web3types.BlockHash
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Eth1Network* = enum
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mainnet
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goerli
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sepolia
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holesky
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GenesisMetadataKind* = enum
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NoGenesis
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UserSuppliedFile
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BakedIn
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BakedInUrl
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DownloadInfo* = object
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url: string
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digest: Eth2Digest
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GenesisMetadata* = object
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case kind*: GenesisMetadataKind
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of NoGenesis:
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discard
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of UserSuppliedFile:
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path*: string
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of BakedIn:
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networkName*: string
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of BakedInUrl:
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url*: string
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digest*: Eth2Digest
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Eth2NetworkMetadata* = object
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# If the eth1Network is specified, the ELManager will perform some
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# additional checks to ensure we are connecting to a web3 provider
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# serving data for the same network. The value can be set to `None`
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# for custom networks and testing purposes.
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eth1Network*: Option[Eth1Network]
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cfg*: RuntimeConfig
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# Parsing `enr.Records` is still not possible at compile-time
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bootstrapNodes*: seq[string]
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depositContractBlock*: uint64
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depositContractBlockHash*: Eth2Digest
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genesis*: GenesisMetadata
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func hasGenesis*(metadata: Eth2NetworkMetadata): bool =
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metadata.genesis.kind != NoGenesis
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proc readBootstrapNodes*(path: string): seq[string] {.raises: [IOError].} =
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# Read a list of ENR values from a YAML file containing a flat list of entries
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if fileExists(path):
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splitLines(readFile(path)).
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filterIt(it.startsWith("enr:")).
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mapIt(it.strip())
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else:
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@[]
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proc readBootEnr*(path: string): seq[string] {.raises: [IOError].} =
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# Read a list of ENR values from a YAML file containing a flat list of entries
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if fileExists(path):
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splitLines(readFile(path)).
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filterIt(it.startsWith("- enr:")).
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mapIt(it[2..^1].strip())
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else:
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@[]
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proc loadEth2NetworkMetadata*(
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path: string,
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eth1Network = none(Eth1Network),
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isCompileTime = false,
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downloadGenesisFrom = none(DownloadInfo),
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useBakedInGenesis = none(string)
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): Result[Eth2NetworkMetadata, string] {.raises: [IOError, PresetFileError].} =
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# Load data in eth2-networks format
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# https://github.com/eth-clients/eth2-networks
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try:
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let
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genesisPath = path & "/genesis.ssz"
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configPath = path & "/config.yaml"
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deployBlockPath = path & "/deploy_block.txt"
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depositContractBlockPath = path & "/deposit_contract_block.txt"
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depositContractBlockHashPath = path & "/deposit_contract_block_hash.txt"
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bootstrapNodesPath = path & "/bootstrap_nodes.txt"
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bootEnrPath = path & "/boot_enr.yaml"
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runtimeConfig = if fileExists(configPath):
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let (cfg, unknowns) = readRuntimeConfig(configPath)
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if unknowns.len > 0:
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when nimvm:
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# TODO better printing
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echo "Unknown constants in file: " & unknowns
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else:
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warn "Unknown constants in config file", unknowns
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cfg
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else:
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defaultRuntimeConfig
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depositContractBlockStr = if fileExists(depositContractBlockPath):
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readFile(depositContractBlockPath).strip
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else:
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""
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depositContractBlockHashStr = if fileExists(depositContractBlockHashPath):
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readFile(depositContractBlockHashPath).strip
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else:
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""
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deployBlockStr = if fileExists(deployBlockPath):
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readFile(deployBlockPath).strip
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else:
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""
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depositContractBlock = if depositContractBlockStr.len > 0:
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parseBiggestUInt depositContractBlockStr
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elif deployBlockStr.len > 0:
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parseBiggestUInt deployBlockStr
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elif not runtimeConfig.DEPOSIT_CONTRACT_ADDRESS.isDefaultValue:
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raise newException(ValueError,
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"A network with deposit contract should specify the " &
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"deposit contract deployment block in a file named " &
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"deposit_contract_block.txt or deploy_block.txt")
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else:
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1'u64
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depositContractBlockHash = if depositContractBlockHashStr.len > 0:
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Eth2Digest.strictParse(depositContractBlockHashStr)
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elif not runtimeConfig.DEPOSIT_CONTRACT_ADDRESS.isDefaultValue:
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raise newException(ValueError,
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"A network with deposit contract should specify the " &
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"deposit contract deployment block hash in a file " &
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"name deposit_contract_block_hash.txt")
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else:
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default(Eth2Digest)
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bootstrapNodes = deduplicate(
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readBootstrapNodes(bootstrapNodesPath) &
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readBootEnr(bootEnrPath))
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ok Eth2NetworkMetadata(
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eth1Network: eth1Network,
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cfg: runtimeConfig,
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bootstrapNodes: bootstrapNodes,
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depositContractBlock: depositContractBlock,
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depositContractBlockHash: depositContractBlockHash,
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genesis:
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if downloadGenesisFrom.isSome:
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GenesisMetadata(kind: BakedInUrl,
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url: downloadGenesisFrom.get.url,
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digest: downloadGenesisFrom.get.digest)
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elif useBakedInGenesis.isSome:
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GenesisMetadata(kind: BakedIn, networkName: useBakedInGenesis.get)
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elif fileExists(genesisPath) and not isCompileTime:
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GenesisMetadata(kind: UserSuppliedFile, path: genesisPath)
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else:
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GenesisMetadata(kind: NoGenesis))
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except PresetIncompatibleError as err:
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err err.msg
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except ValueError as err:
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raise (ref PresetFileError)(msg: err.msg)
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proc loadCompileTimeNetworkMetadata(
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path: string,
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eth1Network = none(Eth1Network),
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useBakedInGenesis = none(string),
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downloadGenesisFrom = none(DownloadInfo)): Eth2NetworkMetadata =
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if fileExists(path & "/config.yaml"):
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try:
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let res = loadEth2NetworkMetadata(
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path, eth1Network, isCompileTime = true,
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downloadGenesisFrom = downloadGenesisFrom,
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useBakedInGenesis = useBakedInGenesis)
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if res.isErr:
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macros.error "The current build is misconfigured. " &
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"Attempt to load an incompatible network metadata: " &
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res.error
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return res.get
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except IOError as err:
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macros.error "Failed to load network metadata at '" & path & "': " &
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"IOError - " & err.msg
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except PresetFileError as err:
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macros.error "Failed to load network metadata at '" & path & "': " &
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"PresetFileError - " & err.msg
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else:
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macros.error "config.yaml not found for network '" & path
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when const_preset == "gnosis":
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when incbinEnabled:
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let
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gnosisGenesis* {.importc: "gnosis_mainnet_genesis".}: ptr UncheckedArray[byte]
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gnosisGenesisSize* {.importc: "gnosis_mainnet_genesis_size".}: int
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chiadoGenesis* {.importc: "gnosis_chiado_genesis".}: ptr UncheckedArray[byte]
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chiadoGenesisSize* {.importc: "gnosis_chiado_genesis_size".}: int
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# let `.incbin` in assembly file find the binary file through search path
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{.passc: "-I" & escape(vendorDir).}
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{.compile: "network_metadata_gnosis.S".}
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else:
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const
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gnosisGenesis* = slurp(
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vendorDir & "/gnosis-chain-configs/mainnet/genesis.ssz")
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chiadoGenesis* = slurp(
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vendorDir & "/gnosis-chain-configs/chiado/genesis.ssz")
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const
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gnosisMetadata = loadCompileTimeNetworkMetadata(
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vendorDir & "/gnosis-chain-configs/mainnet",
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none(Eth1Network),
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useBakedInGenesis = some "gnosis")
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chiadoMetadata = loadCompileTimeNetworkMetadata(
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vendorDir & "/gnosis-chain-configs/chiado",
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none(Eth1Network),
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useBakedInGenesis = some "chiado")
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static:
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for network in [gnosisMetadata, chiadoMetadata]:
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checkForkConsistency(network.cfg)
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for network in [gnosisMetadata, chiadoMetadata]:
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doAssert network.cfg.DENEB_FORK_EPOCH < FAR_FUTURE_EPOCH
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doAssert network.cfg.ELECTRA_FORK_EPOCH == FAR_FUTURE_EPOCH
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static: doAssert ConsensusFork.high == ConsensusFork.Electra
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elif const_preset == "mainnet":
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when incbinEnabled:
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# Nim is very inefficent at loading large constants from binary files so we
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# use this trick instead which saves significant amounts of compile time
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{.push hint[GlobalVar]:off.}
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let
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mainnetGenesis* {.importc: "eth2_mainnet_genesis".}: ptr UncheckedArray[byte]
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mainnetGenesisSize* {.importc: "eth2_mainnet_genesis_size".}: int
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sepoliaGenesis* {.importc: "eth2_sepolia_genesis".}: ptr UncheckedArray[byte]
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sepoliaGenesisSize* {.importc: "eth2_sepolia_genesis_size".}: int
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{.pop.}
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# let `.incbin` in assembly file find the binary file through search path
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{.passc: "-I" & escape(vendorDir).}
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{.compile: "network_metadata_mainnet.S".}
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else:
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const
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mainnetGenesis* = slurp(
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vendorDir & "/eth2-networks/shared/mainnet/genesis.ssz")
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sepoliaGenesis* = slurp(
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vendorDir & "/sepolia/bepolia/genesis.ssz")
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const
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mainnetMetadata = loadCompileTimeNetworkMetadata(
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vendorDir & "/eth2-networks/shared/mainnet",
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some mainnet,
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useBakedInGenesis = some "mainnet")
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holeskyMetadata = loadCompileTimeNetworkMetadata(
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vendorDir & "/holesky/custom_config_data",
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some holesky,
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downloadGenesisFrom = some DownloadInfo(
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url: "https://github.com/status-im/nimbus-eth2/releases/download/v23.9.1/holesky-genesis.ssz.sz",
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digest: Eth2Digest.fromHex "0x0ea3f6f9515823b59c863454675fefcd1d8b4f2dbe454db166206a41fda060a0"))
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sepoliaMetadata = loadCompileTimeNetworkMetadata(
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vendorDir & "/sepolia/bepolia",
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some sepolia,
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useBakedInGenesis = some "sepolia")
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static:
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for network in [mainnetMetadata, sepoliaMetadata, holeskyMetadata]:
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checkForkConsistency(network.cfg)
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for network in [mainnetMetadata, sepoliaMetadata, holeskyMetadata]:
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doAssert network.cfg.DENEB_FORK_EPOCH < FAR_FUTURE_EPOCH
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doAssert network.cfg.ELECTRA_FORK_EPOCH == FAR_FUTURE_EPOCH
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static: doAssert ConsensusFork.high == ConsensusFork.Electra
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proc getMetadataForNetwork*(networkName: string): Eth2NetworkMetadata =
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template loadRuntimeMetadata(): auto =
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if fileExists(networkName / "config.yaml"):
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try:
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let res = loadEth2NetworkMetadata(networkName)
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res.valueOr:
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fatal "The selected network is not compatible with the current build",
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reason = res.error
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quit 1
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except IOError as exc:
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fatal "Cannot load network: IOError", msg = exc.msg, networkName
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quit 1
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except PresetFileError as exc:
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fatal "Cannot load network: PresetFileError", msg = exc.msg, networkName
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quit 1
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else:
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fatal "config.yaml not found for network", networkName
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quit 1
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if networkName in ["goerli", "prater"]:
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warn "Goerli is deprecated and will stop being supported; https://blog.ethereum.org/2023/11/30/goerli-lts-update suggests migrating to Holesky or Sepolia"
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let metadata =
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when const_preset == "gnosis":
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case toLowerAscii(networkName)
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of "gnosis":
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gnosisMetadata
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of "gnosis-chain":
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warn "`--network:gnosis-chain` is deprecated, " &
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"use `--network:gnosis` instead"
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gnosisMetadata
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of "chiado":
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chiadoMetadata
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else:
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loadRuntimeMetadata()
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elif const_preset == "mainnet":
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case toLowerAscii(networkName)
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of "mainnet":
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mainnetMetadata
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of "holesky":
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holeskyMetadata
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of "sepolia":
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sepoliaMetadata
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else:
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loadRuntimeMetadata()
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else:
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loadRuntimeMetadata()
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metadata
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proc getRuntimeConfig*(eth2Network: Option[string]): RuntimeConfig =
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## Returns the run-time config for a network specified on the command line
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## If the network is not explicitly specified, the function will act as the
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## regular Nimbus binary, returning the mainnet config.
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##
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## TODO the assumption that the input variable is a CLI config option is not
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## quite appropriate in such as low-level function. The "assume mainnet by
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## default" behavior is something that should be handled closer to the `conf`
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## layer.
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let metadata =
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if eth2Network.isSome:
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getMetadataForNetwork(eth2Network.get)
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else:
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when const_preset == "mainnet":
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mainnetMetadata
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elif const_preset == "gnosis":
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gnosisMetadata
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else:
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# This is a non-standard build (i.e. minimal), and the function was
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# most likely executed in a test. The best we can do is return a fully
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# default config:
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return defaultRuntimeConfig
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metadata.cfg
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when const_preset in ["mainnet", "gnosis"]:
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template bakedInGenesisStateAsBytes(networkName: untyped): untyped =
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when incbinEnabled:
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`networkName Genesis`.toOpenArray(0, `networkName GenesisSize` - 1)
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else:
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`networkName Genesis`.toOpenArrayByte(0, `networkName Genesis`.high)
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const
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availableOnlyInMainnetBuild =
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"Baked-in genesis states for the official Ethereum " &
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"networks are available only in the mainnet build of Nimbus"
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availableOnlyInGnosisBuild =
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"Baked-in genesis states for the Gnosis network " &
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"are available only in the gnosis build of Nimbus"
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template bakedBytes*(metadata: GenesisMetadata): auto =
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case metadata.networkName
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of "mainnet":
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when const_preset == "mainnet":
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bakedInGenesisStateAsBytes mainnet
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else:
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raiseAssert availableOnlyInMainnetBuild
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of "sepolia":
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when const_preset == "mainnet":
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bakedInGenesisStateAsBytes sepolia
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else:
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raiseAssert availableOnlyInMainnetBuild
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of "gnosis":
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when const_preset == "gnosis":
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bakedInGenesisStateAsBytes gnosis
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else:
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raiseAssert availableOnlyInGnosisBuild
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of "chiado":
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when const_preset == "gnosis":
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bakedInGenesisStateAsBytes chiado
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else:
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raiseAssert availableOnlyInGnosisBuild
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else:
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raiseAssert "The baked network metadata should use one of the name above"
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func bakedGenesisValidatorsRoot*(metadata: Eth2NetworkMetadata): Opt[Eth2Digest] =
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case metadata.genesis.kind
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of BakedIn:
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try:
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let header = SSZ.decode(
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toOpenArray(metadata.genesis.bakedBytes, 0, sizeof(BeaconStateHeader) - 1),
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BeaconStateHeader)
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Opt.some header.genesis_validators_root
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except SerializationError:
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raiseAssert "Invalid baken-in genesis state"
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else:
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Opt.none Eth2Digest
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else:
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func bakedBytes*(metadata: GenesisMetadata): seq[byte] =
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raiseAssert "Baked genesis states are not available in the current build mode"
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func bakedGenesisValidatorsRoot*(metadata: Eth2NetworkMetadata): Opt[Eth2Digest] =
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Opt.none Eth2Digest
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