1326 lines
50 KiB
Nim
1326 lines
50 KiB
Nim
# beacon_chain
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# Copyright (c) 2023 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/[json, times],
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stew/saturation_arith,
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eth/common/eth_types_rlp,
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eth/p2p/discoveryv5/random2,
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json_rpc/jsonmarshal,
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web3/ethtypes,
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../el/el_manager,
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../spec/eth2_apis/[eth2_rest_serialization, rest_light_client_calls],
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../spec/[helpers, light_client_sync],
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../sync/light_client_sync_helpers,
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../beacon_clock
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{.pragma: exported, cdecl, exportc, dynlib, raises: [].}
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{.pragma: exportedConst, exportc, dynlib.}
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proc toUnmanagedPtr[T](x: ref T): ptr T =
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GC_ref(x)
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addr x[]
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func asRef[T](x: ptr T): ref T =
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cast[ref T](x)
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proc destroy[T](x: ptr T) =
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x[].reset()
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GC_unref(asRef(x))
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proc ETHRandomNumberCreate(): ptr HmacDrbgContext {.exported.} =
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## Creates a new cryptographically secure random number generator.
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##
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## * The cryptographically secure random number generator must be destroyed
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## with `ETHRandomNumberDestroy` once no longer needed, to release memory.
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##
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## Returns:
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## * Pointer to an initialized cryptographically secure random number
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## generator context - If successful.
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## * `NULL` - If an error occurred.
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HmacDrbgContext.new().toUnmanagedPtr()
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proc ETHRandomNumberDestroy(rng: ptr HmacDrbgContext) {.exported.} =
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## Destroys a cryptographically secure random number generator.
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##
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## * The cryptographically secure random number generator
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## must no longer be used after destruction.
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##
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## Parameters:
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## * `rng` - Cryptographically secure random number generator.
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rng.destroy()
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proc ETHConsensusConfigCreateFromYaml(
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configFileContent: cstring): ptr RuntimeConfig {.exported.} =
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## Creates a new Ethereum Consensus Layer network configuration
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## based on the given `config.yaml` file content from an
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## Ethereum network definition.
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##
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## * The Ethereum Consensus Layer network configuration must be destroyed with
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## `ETHConsensusConfigDestroy` once no longer needed, to release memory.
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##
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## Parameters:
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## * `configFileContent` - `config.yaml` file content. NULL-terminated.
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##
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## Returns:
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## * Pointer to an initialized Ethereum Consensus Layer network configuration
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## based on the given `config.yaml` file content - If successful.
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## * `NULL` - If the given `config.yaml` is malformed or incompatible.
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##
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## See:
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## * https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/configs/README.md
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let cfg = RuntimeConfig.new()
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try:
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cfg[] = readRuntimeConfig($configFileContent, "config.yaml")[0]
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except IOError, PresetFileError, PresetIncompatibleError:
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return nil
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cfg.toUnmanagedPtr()
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proc ETHConsensusConfigDestroy(cfg: ptr RuntimeConfig) {.exported.} =
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## Destroys an Ethereum Consensus Layer network configuration.
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##
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## * The Ethereum Consensus Layer network configuration
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## must no longer be used after destruction.
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##
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## Parameters:
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## * `cfg` - Ethereum Consensus Layer network configuration.
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cfg.destroy()
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func ETHConsensusConfigGetConsensusVersionAtEpoch(
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cfg: ptr RuntimeConfig, epoch: cint): cstring {.exported.} =
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## Returns the expected `Eth-Consensus-Version` for a given `epoch`.
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##
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## * The returned `Eth-Consensus-Version` is statically allocated.
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## It must neither be released nor written to.
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##
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## Parameters:
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## * `cfg` - Ethereum Consensus Layer network configuration.
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## * `epoch` - Epoch number for which to obtain `Eth-Consensus-Version`
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##
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## Returns:
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## * Expected `Eth-Consensus-Version` for the given `epoch`. NULL-terminated.
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##
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## See:
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## * https://github.com/ethereum/beacon-APIs/blob/v2.4.1/beacon-node-oapi.yaml#L419
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withConsensusFork(cfg[].consensusForkAtEpoch(epoch.Epoch)):
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const consensusVersion: cstring = consensusFork.toString()
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consensusVersion
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proc ETHBeaconStateCreateFromSsz(
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cfg: ptr RuntimeConfig,
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consensusVersion: cstring,
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sszBytes: ptr UncheckedArray[byte],
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numSszBytes: cint): ptr ForkedHashedBeaconState {.exported.} =
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## Creates a new beacon state based on its SSZ encoded representation.
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##
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## * The beacon state must be destroyed with `ETHBeaconStateDestroy`
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## once no longer needed, to release memory.
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##
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## * When loading a `genesis.ssz` file from an Ethereum network definition,
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## use `ETHConsensusConfigGetConsensusVersionAtEpoch` with `epoch = 0`
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## to determine the correct `consensusVersion`.
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##
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## Parameters:
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## * `cfg` - Ethereum Consensus Layer network configuration.
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## * `consensusVersion` - `Eth-Consensus-Version` for the given `sszBytes`.
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## * `sszBytes` - Buffer with SSZ encoded beacon state representation.
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## * `numSszBytes` - Length of buffer.
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##
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## Returns:
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## * Pointer to an initialized beacon state based on the given SSZ encoded
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## representation - If successful.
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## * `NULL` - If the given `sszBytes` is malformed.
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##
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## See:
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## * https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/phase0/beacon-chain.md#beaconstate
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## * https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/altair/beacon-chain.md#beaconstate
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## * https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/bellatrix/beacon-chain.md#beaconstate
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## * https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/capella/beacon-chain.md#beaconstate
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## * https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/configs/README.md
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let
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consensusFork = decodeEthConsensusVersion($consensusVersion).valueOr:
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return nil
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state = ForkedHashedBeaconState.new()
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try:
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state[] = consensusFork.readSszForkedHashedBeaconState(
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sszBytes.toOpenArray(0, numSszBytes - 1))
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except SszError:
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return nil
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withState(state[]):
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if cfg[].consensusForkAtEpoch(forkyState.data.slot.epoch) != state.kind:
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return nil
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state.toUnmanagedPtr()
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proc ETHBeaconStateDestroy(state: ptr ForkedHashedBeaconState) {.exported.} =
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## Destroys a beacon state.
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##
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## * The beacon state must no longer be used after destruction.
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##
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## Parameters:
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## * `state` - Beacon state.
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state.destroy()
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proc ETHBeaconStateCopyGenesisValidatorsRoot(
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state: ptr ForkedHashedBeaconState): ptr Eth2Digest {.exported.} =
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## Copies the `genesis_validators_root` field from a beacon state.
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##
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## * The genesis validators root must be destroyed with `ETHRootDestroy`
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## once no longer needed, to release memory.
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##
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## Parameters:
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## * `state` - Beacon state.
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##
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## Returns:
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## * Pointer to a copy of the given beacon state's genesis validators root.
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let genesisValRoot = Eth2Digest.new()
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genesisValRoot[] = getStateField(state[], genesis_validators_root)
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genesisValRoot.toUnmanagedPtr()
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proc ETHRootDestroy(root: ptr Eth2Digest) {.exported.} =
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## Destroys a Merkle root.
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##
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## * The Merkle root must no longer be used after destruction.
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##
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## Parameters:
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## * `root` - Merkle root.
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##
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## See:
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## * https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/phase0/beacon-chain.md#custom-types
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root.destroy()
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proc ETHForkDigestsCreateFromState(
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cfg: ptr RuntimeConfig,
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state: ptr ForkedHashedBeaconState): ptr ForkDigests {.exported.} =
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## Creates a fork digests cache for a given beacon state.
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##
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## * The fork digests cache must be destroyed with `ETHForkDigestsDestroy`
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## once no longer needed, to release memory.
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##
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## Parameters:
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## * `cfg` - Ethereum Consensus Layer network configuration.
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## * `state` - Beacon state.
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##
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## Returns:
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## * Pointer to an initialized fork digests cache based on the beacon state.
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##
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## See:
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## * https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/phase0/beacon-chain.md#compute_fork_digest
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let forkDigests = ForkDigests.new()
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forkDigests[] = ForkDigests.init(
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cfg[], getStateField(state[], genesis_validators_root))
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forkDigests.toUnmanagedPtr()
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proc ETHForkDigestsDestroy(forkDigests: ptr ForkDigests) {.exported.} =
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## Destroys a fork digests cache.
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##
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## * The fork digests cache must no longer be used after destruction.
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##
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## Parameters:
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## * `forkDigests` - Fork digests cache.
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forkDigests.destroy()
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proc ETHBeaconClockCreateFromState(
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state: ptr ForkedHashedBeaconState): ptr BeaconClock {.exported.} =
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## Creates a beacon clock for a given beacon state's `genesis_time` field.
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##
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## * The beacon clock must be destroyed with `ETHBeaconClockDestroy`
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## once no longer needed, to release memory.
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##
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## Parameters:
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## * `state` - Beacon state.
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##
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## Returns:
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## * Pointer to an initialized beacon clock based on the beacon state.
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let beaconClock = BeaconClock.new()
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beaconClock[] = BeaconClock.init(getStateField(state[], genesis_time))
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beaconClock.toUnmanagedPtr()
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proc ETHBeaconClockDestroy(beaconClock: ptr BeaconClock) {.exported.} =
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## Destroys a beacon clock.
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##
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## * The beacon clock must no longer be used after destruction.
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##
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## Parameters:
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## * `beaconClock` - Beacon clock.
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beaconClock.destroy()
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proc ETHBeaconClockGetSlot(beaconClock: ptr BeaconClock): cint {.exported.} =
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## Indicates the slot number for the current wall clock time.
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##
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## Parameters:
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## * `beaconClock` - Beacon clock.
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##
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## Returns:
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## * Slot number for the current wall clock time - If genesis has occurred.
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## * `0` - If genesis is still pending.
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##
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## See:
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## * https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/phase0/beacon-chain.md#custom-types
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beaconClock[].now().slotOrZero().cint
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const lcDataFork = LightClientDataFork.high
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proc ETHLightClientStoreCreateFromBootstrap(
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cfg: ptr RuntimeConfig,
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trustedBlockRoot: ptr Eth2Digest,
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mediaType: cstring,
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consensusVersion: cstring,
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bootstrapBytes: ptr UncheckedArray[byte],
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numBootstrapBytes: cint
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): ptr lcDataFork.LightClientStore {.exported.} =
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## Creates a light client store from light client bootstrap data.
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## The light client store is the primary object for syncing with
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## an Ethereum network.
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##
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## * To create a light client store, the Ethereum network definition
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## including the fork schedule, `genesis_time` and `genesis_validators_root`
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## must be known. Furthermore, a beacon block root must be assumed trusted.
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## The trusted block root should be within the weak subjectivity period,
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## and its root should be from a finalized `Checkpoint`.
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##
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## * The REST `/eth/v1/beacon/light_client/bootstrap/{block_root}` beacon API
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## may be used to obtain light client bootstrap data for a given
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## trusted block root. Setting the `Accept: application/octet-stream`
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## HTTP header in the request selects the more compact SSZ representation.
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##
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## * After creating a light client store, `ETHLightClientStoreGetNextSyncTask`
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## may be used to determine what further REST beacon API requests to perform
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## for keeping the light client store in sync with the Ethereum network.
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##
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## * Once synced the REST `/eth/v1/events?topics=light_client_finality_update`
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## `&topics=light_client_optimistic_update` beacon API provides the most
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## recent light client data. Data from this endpoint is always JSON encoded
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## and may be processed with `ETHLightClientStoreProcessFinalityUpdate` and
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## `ETHLightClientStoreProcessOptimisticUpdate`.
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##
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## * The light client store must be destroyed with
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## `ETHLightClientStoreDestroy` once no longer needed, to release memory.
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##
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## Parameters:
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## * `cfg` - Ethereum Consensus Layer network configuration.
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## * `trustedBlockRoot` - Trusted block root.
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## * `mediaType` - HTTP `Content-Type` associated with `bootstrapBytes`;
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## `application/json` for JSON, `application/octet-stream` for SSZ.
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## * `consensusVersion` - HTTP `Eth-Consensus-Version` response header
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## associated with `bootstrapBytes`.
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## * `bootstrapBytes` - Buffer with encoded light client bootstrap data.
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## * `numBootstrapBytes` - Length of buffer.
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##
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## Returns:
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## * Pointer to an initialized light client store based on the given
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## light client bootstrap data - If successful.
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## * `NULL` - If the given `bootstrapBytes` is malformed or incompatible.
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##
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## See:
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## * https://ethereum.github.io/beacon-APIs/?urls.primaryName=v2.4.1#/Beacon/getLightClientBootstrap
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## * https://ethereum.github.io/beacon-APIs/?urls.primaryName=v2.4.1#/Events/eventstream
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## * https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/altair/light-client/light-client.md
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## * https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/phase0/weak-subjectivity.md#weak-subjectivity-period
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let
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mediaType = MediaType.init($mediaType)
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consensusFork = decodeEthConsensusVersion($consensusVersion).valueOr:
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return nil
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var bootstrap =
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try:
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ForkedLightClientBootstrap.decodeHttpLightClientObject(
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bootstrapBytes.toOpenArray(0, numBootstrapBytes - 1),
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mediaType, consensusFork, cfg[])
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except RestError:
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return nil
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doAssert bootstrap.kind > LightClientDataFork.None
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bootstrap.migrateToDataFork(lcDataFork)
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let store = lcDataFork.LightClientStore.new()
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store[] = initialize_light_client_store(
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trustedBlockRoot[], bootstrap.forky(lcDataFork), cfg[]).valueOr:
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return nil
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store.toUnmanagedPtr()
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proc ETHLightClientStoreDestroy(
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store: ptr lcDataFork.LightClientStore) {.exported.} =
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## Destroys a light client store.
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##
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## * The light client store must no longer be used after destruction.
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##
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## Parameters:
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## * `store` - Light client store.
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store.destroy()
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let
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## Sync task to fulfill using `/eth/v1/beacon/light_client/updates`.
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kETHLcSyncKind_UpdatesByRange {.exportedConst.} =
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LcSyncKind.UpdatesByRange.cint
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## Sync task to fulfill using `/eth/v1/beacon/light_client/finality_update`.
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kETHLcSyncKind_FinalityUpdate {.exportedConst.} =
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LcSyncKind.FinalityUpdate.cint
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## Sync task to fulfill using `/eth/v1/beacon/light_client/optimistic_update`.
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kETHLcSyncKind_OptimisticUpdate {.exportedConst.} =
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LcSyncKind.OptimisticUpdate.cint
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proc ETHLightClientStoreGetNextSyncTask(
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store: ptr lcDataFork.LightClientStore,
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beaconClock: ptr BeaconClock,
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startPeriod #[out]#: ptr cint,
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count #[out]#: ptr cint): cint {.exported.} =
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## Obtains the next task for keeping a light client store in sync
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## with the Ethereum network.
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##
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## * When using the REST beacon API to fulfill a sync task, setting the
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## `Accept: application/octet-stream` HTTP header in the request
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## selects the more compact SSZ representation.
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##
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## * After fetching the requested light client data and processing it with the
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## appropriate handler, `ETHLightClientStoreGetMillisecondsToNextSyncTask`
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## may be used to obtain a delay until a new sync task becomes available.
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## Once the delay is reached, call `ETHLightClientStoreGetNextSyncTask`
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## again to obtain the next sync task.
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##
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## * Once synced the REST `/eth/v1/events?topics=light_client_finality_update`
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## `&topics=light_client_optimistic_update` beacon API provides the most
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## recent light client data. Data from this endpoint is always JSON encoded
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## and may be processed with `ETHLightClientStoreProcessFinalityUpdate` and
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## `ETHLightClientStoreProcessOptimisticUpdate`. Events may be processed at
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## any time and do not require re-computing the delay until next sync task
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## with `ETHLightClientStoreGetMillisecondsToNextSyncTask`.
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##
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## Parameters:
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## * `store` - Light client store.
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## * `beaconClock` - Beacon clock.
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## * `startPeriod` [out] - `start_period` query parameter, if applicable.
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## * `count` [out] - `count` query parameter, if applicable.
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##
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## Returns:
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## * `kETHLcSyncKind_UpdatesByRange` - If the next sync task is fulfillable
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## using REST `/eth/v1/beacon/light_client/updates` beacon API.
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## The `startPeriod` and `count` parameters are filled, and to be passed to
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## `/eth/v1/beacon/light_client/updates?start_period={startPeriod}`
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## `&count={count}`.
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## Process the response with `ETHLightClientStoreProcessUpdatesByRange`.
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## * `kETHLcSyncKind_FinalityUpdate` - If the next sync task is fulfillable
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## using REST `/eth/v1/beacon/light_client/finality_update` beacon API.
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## Process the response with `ETHLightClientStoreProcessFinalityUpdate`.
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## The `startPeriod` and `count` parameters are unused for this sync task.
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## * `kETHLcSyncKind_OptimisticUpdate` - If the next sync task is fulfillable
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## using REST `/eth/v1/beacon/light_client/optimistic_update` beacon API.
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## Process the response with `ETHLightClientStoreProcessOptimisticUpdate`.
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## The `startPeriod` and `count` parameters are unused for this sync task.
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##
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## See:
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## * https://ethereum.github.io/beacon-APIs/?urls.primaryName=v2.4.1#/Beacon/getLightClientUpdatesByRange
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## * https://ethereum.github.io/beacon-APIs/?urls.primaryName=v2.4.1#/Beacon/getLightClientFinalityUpdate
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## * https://ethereum.github.io/beacon-APIs/?urls.primaryName=v2.4.1#/Beacon/getLightClientOptimisticUpdate
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## * https://ethereum.github.io/beacon-APIs/?urls.primaryName=v2.4.1#/Events/eventstream
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let syncTask = nextLightClientSyncTask(
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current = beaconClock[].now().slotOrZero().sync_committee_period,
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finalized = store[].finalized_header.beacon.slot.sync_committee_period,
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optimistic = store[].optimistic_header.beacon.slot.sync_committee_period,
|
|
isNextSyncCommitteeKnown = store[].is_next_sync_committee_known)
|
|
case syncTask.kind
|
|
of LcSyncKind.UpdatesByRange:
|
|
startPeriod[] = syncTask.startPeriod.cint
|
|
count[] = syncTask.count.cint
|
|
of LcSyncKind.FinalityUpdate:
|
|
startPeriod[] = 0
|
|
count[] = 0
|
|
of LcSyncKind.OptimisticUpdate:
|
|
startPeriod[] = 0
|
|
count[] = 0
|
|
syncTask.kind.cint
|
|
|
|
proc ETHLightClientStoreGetMillisecondsToNextSyncTask(
|
|
store: ptr lcDataFork.LightClientStore,
|
|
rng: ptr HmacDrbgContext,
|
|
beaconClock: ptr BeaconClock,
|
|
latestProcessResult: cint): cint {.exported.} =
|
|
## Indicates the delay until a new light client sync task becomes available.
|
|
## Once the delay is reached, call `ETHLightClientStoreGetNextSyncTask`
|
|
## to obtain the next sync task.
|
|
##
|
|
## Parameters:
|
|
## * `store` - Light client store.
|
|
## * `rng` - Cryptographically secure random number generator.
|
|
## * `beaconClock` - Beacon clock.
|
|
## * `latestProcessResult` - Latest sync task processing result, i.e.,
|
|
## the return value of `ETHLightClientStoreProcessUpdatesByRange`,
|
|
## `ETHLightClientStoreProcessFinalityUpdate`, or
|
|
## `ETHLightClientStoreProcessOptimisticUpdate`, for latest task.
|
|
## If the data for the sync task could not be fetched, set to `1`.
|
|
##
|
|
## Returns:
|
|
## * Number of milliseconds until `ETHLightClientStoreGetNextSyncTask`
|
|
## should be called again to obtain the next light client sync task.
|
|
asRef(rng).nextLcSyncTaskDelay(
|
|
wallTime = beaconClock[].now(),
|
|
finalized = store[].finalized_header.beacon.slot.sync_committee_period,
|
|
optimistic = store[].optimistic_header.beacon.slot.sync_committee_period,
|
|
isNextSyncCommitteeKnown = store[].is_next_sync_committee_known,
|
|
didLatestSyncTaskProgress = (latestProcessResult == 0)).milliseconds.cint
|
|
|
|
proc ETHLightClientStoreProcessUpdatesByRange(
|
|
store: ptr lcDataFork.LightClientStore,
|
|
cfg: ptr RuntimeConfig,
|
|
forkDigests: ptr ForkDigests,
|
|
genesisValRoot: ptr Eth2Digest,
|
|
beaconClock: ptr BeaconClock,
|
|
startPeriod: cint,
|
|
count: cint,
|
|
mediaType: cstring,
|
|
updatesBytes: ptr UncheckedArray[byte],
|
|
numUpdatesBytes: cint): cint {.exported.} =
|
|
## Processes light client update data.
|
|
##
|
|
## * This processes the response data for a sync task of kind
|
|
## `kETHLcSyncKind_UpdatesByRange`, as indicated by
|
|
## `ETHLightClientStoreGetNextSyncTask`. After processing, call
|
|
## `ETHLightClientStoreGetMillisecondsToNextSyncTask` to obtain a delay
|
|
## until a new sync task becomes available.
|
|
##
|
|
## Parameters:
|
|
## * `store` - Light client store.
|
|
## * `cfg` - Ethereum Consensus Layer network configuration.
|
|
## * `forkDigests` - Fork digests cache.
|
|
## * `genesisValRoot` - Genesis validators root.
|
|
## * `beaconClock` - Beacon clock.
|
|
## * `startPeriod` - `startPeriod` parameter associated with the sync task.
|
|
## * `count` - `count` parameter associated with the sync task.
|
|
## * `mediaType` - HTTP `Content-Type` associated with `updatesBytes`;
|
|
## `application/json` for JSON, `application/octet-stream` for SSZ.
|
|
## * `updatesBytes` - Buffer with encoded light client update data.
|
|
## * `numUpdatesBytes` - Length of buffer.
|
|
##
|
|
## Returns:
|
|
## * `0` - If the given `updatesBytes` is valid and sync did progress.
|
|
## * `1` - If the given `updatesBytes` is malformed or incompatible.
|
|
## * `2` - If the given `updatesBytes` did not advance sync progress.
|
|
##
|
|
## See:
|
|
## * https://ethereum.github.io/beacon-APIs/?urls.primaryName=v2.4.1#/Beacon/getLightClientUpdatesByRange
|
|
let
|
|
wallTime = beaconClock[].now()
|
|
currentSlot = wallTime.slotOrZero()
|
|
mediaType = MediaType.init($mediaType)
|
|
var updates =
|
|
try:
|
|
seq[ForkedLightClientUpdate].decodeHttpLightClientObjects(
|
|
updatesBytes.toOpenArray(0, numUpdatesBytes - 1),
|
|
mediaType, cfg[], asRef(forkDigests))
|
|
except RestError:
|
|
return 1
|
|
let e = updates.checkLightClientUpdates(
|
|
startPeriod.SyncCommitteePeriod, count.uint64)
|
|
if e.isErr:
|
|
return 1
|
|
var didProgress = false
|
|
for i in 0 ..< updates.len:
|
|
doAssert updates[i].kind > LightClientDataFork.None
|
|
updates[i].migrateToDataFork(lcDataFork)
|
|
let res = process_light_client_update(
|
|
store[], updates[i].forky(lcDataFork),
|
|
currentSlot, cfg[], genesisValRoot[])
|
|
if res.isOk:
|
|
didProgress = true
|
|
else:
|
|
case res.error
|
|
of VerifierError.MissingParent:
|
|
break
|
|
of VerifierError.Duplicate:
|
|
discard
|
|
of VerifierError.UnviableFork:
|
|
break
|
|
of VerifierError.Invalid:
|
|
return 1
|
|
if not didProgress:
|
|
return 2
|
|
0
|
|
|
|
proc ETHLightClientStoreProcessFinalityUpdate(
|
|
store: ptr lcDataFork.LightClientStore,
|
|
cfg: ptr RuntimeConfig,
|
|
forkDigests: ptr ForkDigests,
|
|
genesisValRoot: ptr Eth2Digest,
|
|
beaconClock: ptr BeaconClock,
|
|
mediaType: cstring,
|
|
consensusVersion #[optional]#: cstring,
|
|
finUpdateBytes: ptr UncheckedArray[byte],
|
|
numFinUpdateBytes: cint): cint {.exported.} =
|
|
## Processes light client finality update data.
|
|
##
|
|
## * This processes the response data for a sync task of kind
|
|
## `kETHLcSyncKind_FinalityUpdate`, as indicated by
|
|
## `ETHLightClientStoreGetNextSyncTask`. After processing, call
|
|
## `ETHLightClientStoreGetMillisecondsToNextSyncTask` to obtain a delay
|
|
## until a new sync task becomes available.
|
|
##
|
|
## * This also processes event data from the REST
|
|
## `/eth/v1/events?topics=light_client_finality_update` beacon API.
|
|
## Set `mediaType` to `application/json`, and `consensusVersion` to `NULL`.
|
|
## Events may be processed at any time, it is not necessary to call
|
|
## `ETHLightClientStoreGetMillisecondsToNextSyncTask`.
|
|
##
|
|
## Parameters:
|
|
## * `store` - Light client store.
|
|
## * `cfg` - Ethereum Consensus Layer network configuration.
|
|
## * `forkDigests` - Fork digests cache.
|
|
## * `genesisValRoot` - Genesis validators root.
|
|
## * `beaconClock` - Beacon clock.
|
|
## * `mediaType` - HTTP `Content-Type` associated with `finUpdateBytes`;
|
|
## `application/json` for JSON, `application/octet-stream` for SSZ.
|
|
## * `consensusVersion` - HTTP `Eth-Consensus-Version` response header
|
|
## associated with `finUpdateBytes`. `NULL` when processing event.
|
|
## * `finUpdateBytes` - Buffer with encoded finality update data.
|
|
## * `numFinUpdateBytes` - Length of buffer.
|
|
##
|
|
## Returns:
|
|
## * `0` - If the given `finUpdateBytes` is valid and sync did progress.
|
|
## * `1` - If the given `finUpdateBytes` is malformed or incompatible.
|
|
## * `2` - If the given `finUpdateBytes` did not advance sync progress.
|
|
##
|
|
## See:
|
|
## * https://ethereum.github.io/beacon-APIs/?urls.primaryName=v2.4.1#/Beacon/getLightClientFinalityUpdate
|
|
## * https://ethereum.github.io/beacon-APIs/?urls.primaryName=v2.4.1#/Events/eventstream
|
|
let
|
|
wallTime = beaconClock[].now()
|
|
currentSlot = wallTime.slotOrZero()
|
|
mediaType = MediaType.init($mediaType)
|
|
var finalityUpdate =
|
|
try:
|
|
if consensusVersion == nil:
|
|
if mediaType != ApplicationJsonMediaType:
|
|
return 1
|
|
ForkedLightClientFinalityUpdate.decodeJsonLightClientObject(
|
|
finUpdateBytes.toOpenArray(0, numFinUpdateBytes - 1),
|
|
Opt.none(ConsensusFork), cfg[])
|
|
else:
|
|
let consensusFork = decodeEthConsensusVersion(
|
|
$consensusVersion).valueOr:
|
|
return 1
|
|
ForkedLightClientFinalityUpdate.decodeHttpLightClientObject(
|
|
finUpdateBytes.toOpenArray(0, numFinUpdateBytes - 1),
|
|
mediaType, consensusFork, cfg[])
|
|
except RestError:
|
|
return 1
|
|
doAssert finalityUpdate.kind > LightClientDataFork.None
|
|
finalityUpdate.migrateToDataFork(lcDataFork)
|
|
let res = process_light_client_update(
|
|
store[], finalityUpdate.forky(lcDataFork),
|
|
currentSlot, cfg[], genesisValRoot[])
|
|
return
|
|
if res.isOk:
|
|
0
|
|
else:
|
|
case res.error
|
|
of VerifierError.MissingParent:
|
|
2
|
|
of VerifierError.Duplicate:
|
|
2
|
|
of VerifierError.UnviableFork:
|
|
2
|
|
of VerifierError.Invalid:
|
|
1
|
|
|
|
proc ETHLightClientStoreProcessOptimisticUpdate(
|
|
store: ptr lcDataFork.LightClientStore,
|
|
cfg: ptr RuntimeConfig,
|
|
forkDigests: ptr ForkDigests,
|
|
genesisValRoot: ptr Eth2Digest,
|
|
beaconClock: ptr BeaconClock,
|
|
mediaType: cstring,
|
|
consensusVersion #[optional]#: cstring,
|
|
optUpdateBytes: ptr UncheckedArray[byte],
|
|
numOptUpdateBytes: cint): cint {.exported.} =
|
|
## Processes light client optimistic update data.
|
|
##
|
|
## * This processes the response data for a sync task of kind
|
|
## `kETHLcSyncKind_OptimisticUpdate`, as indicated by
|
|
## `ETHLightClientStoreGetNextSyncTask`. After processing, call
|
|
## `ETHLightClientStoreGetMillisecondsToNextSyncTask` to obtain a delay
|
|
## until a new sync task becomes available.
|
|
##
|
|
## * This also processes event data from the REST
|
|
## `/eth/v1/events?topics=light_client_optimistic_update` beacon API.
|
|
## Set `mediaType` to `application/json`, and `consensusVersion` to `NULL`.
|
|
## Events may be processed at any time, it is not necessary to call
|
|
## `ETHLightClientStoreGetMillisecondsToNextSyncTask`.
|
|
##
|
|
## Parameters:
|
|
## * `store` - Light client store.
|
|
## * `cfg` - Ethereum Consensus Layer network configuration.
|
|
## * `forkDigests` - Fork digests cache.
|
|
## * `genesisValRoot` - Genesis validators root.
|
|
## * `beaconClock` - Beacon clock.
|
|
## * `mediaType` - HTTP `Content-Type` associated with `optUpdateBytes`;
|
|
## `application/json` for JSON, `application/octet-stream` for SSZ.
|
|
## * `consensusVersion` - HTTP `Eth-Consensus-Version` response header
|
|
## associated with `optUpdateBytes`. `NULL` when processing event.
|
|
## * `optUpdateBytes` - Buffer with encoded optimistic update data.
|
|
## * `numOptUpdateBytes` - Length of buffer.
|
|
##
|
|
## Returns:
|
|
## * `0` - If the given `optUpdateBytes` is valid and sync did progress.
|
|
## * `1` - If the given `optUpdateBytes` is malformed or incompatible.
|
|
## * `2` - If the given `optUpdateBytes` did not advance sync progress.
|
|
##
|
|
## See:
|
|
## * https://ethereum.github.io/beacon-APIs/?urls.primaryName=v2.4.1#/Beacon/getLightClientOptimisticUpdate
|
|
## * https://ethereum.github.io/beacon-APIs/?urls.primaryName=v2.4.1#/Events/eventstream
|
|
let
|
|
wallTime = beaconClock[].now()
|
|
currentSlot = wallTime.slotOrZero()
|
|
mediaType = MediaType.init($mediaType)
|
|
var optimisticUpdate =
|
|
try:
|
|
if consensusVersion == nil:
|
|
if mediaType != ApplicationJsonMediaType:
|
|
return 1
|
|
ForkedLightClientOptimisticUpdate.decodeJsonLightClientObject(
|
|
optUpdateBytes.toOpenArray(0, numOptUpdateBytes - 1),
|
|
Opt.none(ConsensusFork), cfg[])
|
|
else:
|
|
let consensusFork = decodeEthConsensusVersion(
|
|
$consensusVersion).valueOr:
|
|
return 1
|
|
ForkedLightClientOptimisticUpdate.decodeHttpLightClientObject(
|
|
optUpdateBytes.toOpenArray(0, numOptUpdateBytes - 1),
|
|
mediaType, consensusFork, cfg[])
|
|
except RestError:
|
|
return 1
|
|
doAssert optimisticUpdate.kind > LightClientDataFork.None
|
|
optimisticUpdate.migrateToDataFork(lcDataFork)
|
|
let res = process_light_client_update(
|
|
store[], optimisticUpdate.forky(lcDataFork),
|
|
currentSlot, cfg[], genesisValRoot[])
|
|
return
|
|
if res.isOk:
|
|
0
|
|
else:
|
|
case res.error
|
|
of VerifierError.MissingParent:
|
|
2
|
|
of VerifierError.Duplicate:
|
|
2
|
|
of VerifierError.UnviableFork:
|
|
2
|
|
of VerifierError.Invalid:
|
|
1
|
|
|
|
func ETHLightClientStoreGetFinalizedHeader(
|
|
store: ptr lcDataFork.LightClientStore
|
|
): ptr lcDataFork.LightClientHeader {.exported.} =
|
|
## Obtains the latest finalized header of a given light client store.
|
|
##
|
|
## * The returned value is allocated in the given light client store.
|
|
## It must neither be released nor written to, and the light client store
|
|
## must not be released while the returned value is in use.
|
|
##
|
|
## Parameters:
|
|
## * `store` - Light client store.
|
|
##
|
|
## Returns:
|
|
## * Latest finalized header.
|
|
##
|
|
## See:
|
|
## * https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/capella/light-client/sync-protocol.md#modified-lightclientheader
|
|
addr store[].finalized_header
|
|
|
|
func ETHLightClientStoreIsNextSyncCommitteeKnown(
|
|
store: ptr lcDataFork.LightClientStore): bool {.exported.} =
|
|
## Indicates whether or not the next sync committee is currently known.
|
|
##
|
|
## * The light client sync process ensures that the next sync committee
|
|
## is obtained in time, before it starts signing light client data.
|
|
## To stay in sync, use `ETHLightClientStoreGetNextSyncTask` and
|
|
## `ETHLightClientStoreGetMillisecondsToNextSyncTask`.
|
|
##
|
|
## Parameters:
|
|
## * `store` - Light client store.
|
|
##
|
|
## Returns:
|
|
## * Whether or not the next sync committee is currently known.
|
|
##
|
|
## See:
|
|
## * https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/altair/light-client/sync-protocol.md#is_next_sync_committee_known
|
|
## * https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/altair/light-client/light-client.md
|
|
store[].is_next_sync_committee_known
|
|
|
|
func ETHLightClientStoreGetOptimisticHeader(
|
|
store: ptr lcDataFork.LightClientStore
|
|
): ptr lcDataFork.LightClientHeader {.exported.} =
|
|
## Obtains the latest optimistic header of a given light client store.
|
|
##
|
|
## * The returned value is allocated in the given light client store.
|
|
## It must neither be released nor written to, and the light client store
|
|
## must not be released while the returned value is in use.
|
|
##
|
|
## Parameters:
|
|
## * `store` - Light client store.
|
|
##
|
|
## Returns:
|
|
## * Latest optimistic header.
|
|
##
|
|
## See:
|
|
## * https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/capella/light-client/sync-protocol.md#modified-lightclientheader
|
|
addr store[].optimistic_header
|
|
|
|
func ETHLightClientStoreGetSafetyThreshold(
|
|
store: ptr lcDataFork.LightClientStore): cint {.exported.} =
|
|
## Calculates the safety threshold for a given light client store.
|
|
##
|
|
## * Light client data can only update the optimistic header if it is signed
|
|
## by more sync committee participants than the safety threshold indicates.
|
|
##
|
|
## * The finalized header is not affected by the safety threshold;
|
|
## light client data can only update the finalized header if it is signed
|
|
## by a supermajority of the sync committee, regardless of safety threshold.
|
|
##
|
|
## Parameters:
|
|
## * `store` - Light client store.
|
|
##
|
|
## Returns:
|
|
## * Light client store safety threshold.
|
|
##
|
|
## See:
|
|
## * https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/altair/light-client/sync-protocol.md#get_safety_threshold
|
|
store[].get_safety_threshold.cint
|
|
|
|
proc ETHLightClientHeaderCreateCopy(
|
|
header: ptr lcDataFork.LightClientHeader
|
|
): ptr lcDataFork.LightClientHeader {.exported.} =
|
|
## Creates a shallow copy of a given light client header.
|
|
##
|
|
## * The copy must be destroyed with `ETHLightClientHeaderDestroy`
|
|
## once no longer needed, to release memory.
|
|
##
|
|
## Parameters:
|
|
## * `header` - Light client header.
|
|
##
|
|
## Returns:
|
|
## * Pointer to a shallow copy of the given header.
|
|
let copy = lcDataFork.LightClientHeader.new()
|
|
copy[] = header[]
|
|
copy.toUnmanagedPtr()
|
|
|
|
proc ETHLightClientHeaderDestroy(
|
|
header: ptr lcDataFork.LightClientHeader) {.exported.} =
|
|
## Destroys a light client header.
|
|
##
|
|
## * The light client header must no longer be used after destruction.
|
|
##
|
|
## Parameters:
|
|
## * `header` - Light client header.
|
|
header.destroy()
|
|
|
|
proc ETHLightClientHeaderCopyBeaconRoot(
|
|
header: ptr lcDataFork.LightClientHeader,
|
|
cfg: ptr RuntimeConfig): ptr Eth2Digest {.exported.} =
|
|
## Computes the beacon block Merkle root for a given light client header.
|
|
##
|
|
## * The Merkle root must be destroyed with `ETHRootDestroy`
|
|
## once no longer needed, to release memory.
|
|
##
|
|
## Parameters:
|
|
## * `header` - Light client header.
|
|
## * `cfg` - Ethereum Consensus Layer network configuration.
|
|
##
|
|
## Returns:
|
|
## * Pointer to a copy of the given header's beacon block root.
|
|
##
|
|
## See:
|
|
## * https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/phase0/beacon-chain.md#hash_tree_root
|
|
discard cfg # Future-proof against new fields, see `get_lc_execution_root`.
|
|
let root = Eth2Digest.new()
|
|
root[] = header[].beacon.hash_tree_root()
|
|
root.toUnmanagedPtr()
|
|
|
|
func ETHLightClientHeaderGetBeacon(
|
|
header: ptr lcDataFork.LightClientHeader
|
|
): ptr BeaconBlockHeader {.exported.} =
|
|
## Obtains the beacon block header of a given light client header.
|
|
##
|
|
## * The returned value is allocated in the given light client header.
|
|
## It must neither be released nor written to, and the light client header
|
|
## must not be released while the returned value is in use.
|
|
##
|
|
## Parameters:
|
|
## * `header` - Light client header.
|
|
##
|
|
## Returns:
|
|
## * Beacon block header.
|
|
##
|
|
## See:
|
|
## * https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/phase0/beacon-chain.md#beaconblockheader
|
|
addr header[].beacon
|
|
|
|
func ETHBeaconBlockHeaderGetSlot(
|
|
beacon: ptr BeaconBlockHeader): cint {.exported.} =
|
|
## Obtains the slot number of a given beacon block header.
|
|
##
|
|
## Parameters:
|
|
## * `beacon` - Beacon block header.
|
|
##
|
|
## Returns:
|
|
## * Slot number.
|
|
beacon[].slot.cint
|
|
|
|
func ETHBeaconBlockHeaderGetProposerIndex(
|
|
beacon: ptr BeaconBlockHeader): cint {.exported.} =
|
|
## Obtains the proposer validator registry index
|
|
## of a given beacon block header.
|
|
##
|
|
## Parameters:
|
|
## * `beacon` - Beacon block header.
|
|
##
|
|
## Returns:
|
|
## * Proposer validator registry index.
|
|
beacon[].proposer_index.cint
|
|
|
|
func ETHBeaconBlockHeaderGetParentRoot(
|
|
beacon: ptr BeaconBlockHeader): ptr Eth2Digest {.exported.} =
|
|
## Obtains the parent beacon block Merkle root of a given beacon block header.
|
|
##
|
|
## * The returned value is allocated in the given beacon block header.
|
|
## It must neither be released nor written to, and the beacon block header
|
|
## must not be released while the returned value is in use.
|
|
##
|
|
## Parameters:
|
|
## * `beacon` - Beacon block header.
|
|
##
|
|
## Returns:
|
|
## * Parent beacon block root.
|
|
addr beacon[].parent_root
|
|
|
|
func ETHBeaconBlockHeaderGetStateRoot(
|
|
beacon: ptr BeaconBlockHeader): ptr Eth2Digest {.exported.} =
|
|
## Obtains the beacon state Merkle root of a given beacon block header.
|
|
##
|
|
## * The returned value is allocated in the given beacon block header.
|
|
## It must neither be released nor written to, and the beacon block header
|
|
## must not be released while the returned value is in use.
|
|
##
|
|
## Parameters:
|
|
## * `beacon` - Beacon block header.
|
|
##
|
|
## Returns:
|
|
## * Beacon state root.
|
|
addr beacon[].state_root
|
|
|
|
func ETHBeaconBlockHeaderGetBodyRoot(
|
|
beacon: ptr BeaconBlockHeader): ptr Eth2Digest {.exported.} =
|
|
## Obtains the beacon block body Merkle root of a given beacon block header.
|
|
##
|
|
## * The returned value is allocated in the given beacon block header.
|
|
## It must neither be released nor written to, and the beacon block header
|
|
## must not be released while the returned value is in use.
|
|
##
|
|
## Parameters:
|
|
## * `beacon` - Beacon block header.
|
|
##
|
|
## Returns:
|
|
## * Beacon block body root.
|
|
addr beacon[].body_root
|
|
|
|
proc ETHLightClientHeaderCopyExecutionHash(
|
|
header: ptr lcDataFork.LightClientHeader,
|
|
cfg: ptr RuntimeConfig
|
|
): ptr Eth2Digest {.exported.} =
|
|
## Computes the execution block hash for a given light client header.
|
|
##
|
|
## * The hash must be destroyed with `ETHRootDestroy`
|
|
## once no longer needed, to release memory.
|
|
##
|
|
## Parameters:
|
|
## * `header` - Light client header.
|
|
## * `cfg` - Ethereum Consensus Layer network configuration.
|
|
##
|
|
## Returns:
|
|
## * Pointer to a copy of the given header's execution block hash.
|
|
##
|
|
## See:
|
|
## * https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.0/specs/deneb/beacon-chain.md#executionpayloadheader
|
|
discard cfg # Future-proof against SSZ execution block header, EIP-6404ff.
|
|
let root = Eth2Digest.new()
|
|
root[] = header[].execution.block_hash
|
|
root.toUnmanagedPtr()
|
|
|
|
type ExecutionPayloadHeader =
|
|
typeof(default(lcDataFork.LightClientHeader).execution)
|
|
|
|
func ETHLightClientHeaderGetExecution(
|
|
header: ptr lcDataFork.LightClientHeader
|
|
): ptr ExecutionPayloadHeader {.exported.} =
|
|
## Obtains the execution payload header of a given light client header.
|
|
##
|
|
## * The returned value is allocated in the given light client header.
|
|
## It must neither be released nor written to, and the light client header
|
|
## must not be released while the returned value is in use.
|
|
##
|
|
## Parameters:
|
|
## * `header` - Light client header.
|
|
##
|
|
## Returns:
|
|
## * Execution payload header.
|
|
##
|
|
## See:
|
|
## * https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.0/specs/deneb/beacon-chain.md#executionpayloadheader
|
|
addr header[].execution
|
|
|
|
func ETHExecutionPayloadHeaderGetParentHash(
|
|
execution: ptr ExecutionPayloadHeader): ptr Eth2Digest {.exported.} =
|
|
## Obtains the parent execution block hash of a given
|
|
## execution payload header.
|
|
##
|
|
## * The returned value is allocated in the given execution payload header.
|
|
## It must neither be released nor written to, and the execution payload
|
|
## header must not be released while the returned value is in use.
|
|
##
|
|
## Parameters:
|
|
## * `execution` - Execution payload header.
|
|
##
|
|
## Returns:
|
|
## * Parent execution block hash.
|
|
addr execution[].parent_hash
|
|
|
|
func ETHExecutionPayloadHeaderGetFeeRecipient(
|
|
execution: ptr ExecutionPayloadHeader): ptr ExecutionAddress {.exported.} =
|
|
## Obtains the fee recipient address of a given execution payload header.
|
|
##
|
|
## * The returned value is allocated in the given execution payload header.
|
|
## It must neither be released nor written to, and the execution payload
|
|
## header must not be released while the returned value is in use.
|
|
##
|
|
## Parameters:
|
|
## * `execution` - Execution payload header.
|
|
##
|
|
## Returns:
|
|
## * Fee recipient execution address.
|
|
addr execution[].fee_recipient
|
|
|
|
func ETHExecutionPayloadHeaderGetStateRoot(
|
|
execution: ptr ExecutionPayloadHeader): ptr Eth2Digest {.exported.} =
|
|
## Obtains the state MPT root of a given execution payload header.
|
|
##
|
|
## * The returned value is allocated in the given execution payload header.
|
|
## It must neither be released nor written to, and the execution payload
|
|
## header must not be released while the returned value is in use.
|
|
##
|
|
## Parameters:
|
|
## * `execution` - Execution payload header.
|
|
##
|
|
## Returns:
|
|
## * Execution state root.
|
|
addr execution[].state_root
|
|
|
|
func ETHExecutionPayloadHeaderGetReceiptsRoot(
|
|
execution: ptr ExecutionPayloadHeader): ptr Eth2Digest {.exported.} =
|
|
## Obtains the receipts MPT root of a given execution payload header.
|
|
##
|
|
## * The returned value is allocated in the given execution payload header.
|
|
## It must neither be released nor written to, and the execution payload
|
|
## header must not be released while the returned value is in use.
|
|
##
|
|
## Parameters:
|
|
## * `execution` - Execution payload header.
|
|
##
|
|
## Returns:
|
|
## * Execution receipts root.
|
|
addr execution[].receipts_root
|
|
|
|
func ETHExecutionPayloadHeaderGetLogsBloom(
|
|
execution: ptr ExecutionPayloadHeader): ptr BloomLogs {.exported.} =
|
|
## Obtains the logs bloom of a given execution payload header.
|
|
##
|
|
## * The returned value is allocated in the given execution payload header.
|
|
## It must neither be released nor written to, and the execution payload
|
|
## header must not be released while the returned value is in use.
|
|
##
|
|
## Parameters:
|
|
## * `execution` - Execution payload header.
|
|
##
|
|
## Returns:
|
|
## * Execution logs bloom.
|
|
addr execution[].logs_bloom
|
|
|
|
func ETHExecutionPayloadHeaderGetPrevRandao(
|
|
execution: ptr ExecutionPayloadHeader): ptr Eth2Digest {.exported.} =
|
|
## Obtains the previous randao mix of a given execution payload header.
|
|
##
|
|
## * The returned value is allocated in the given execution payload header.
|
|
## It must neither be released nor written to, and the execution payload
|
|
## header must not be released while the returned value is in use.
|
|
##
|
|
## Parameters:
|
|
## * `execution` - Execution payload header.
|
|
##
|
|
## Returns:
|
|
## * Previous randao mix.
|
|
addr execution[].prev_randao
|
|
|
|
func ETHExecutionPayloadHeaderGetBlockNumber(
|
|
execution: ptr ExecutionPayloadHeader): cint {.exported.} =
|
|
## Obtains the execution block number of a given execution payload header.
|
|
##
|
|
## Parameters:
|
|
## * `execution` - Execution payload header.
|
|
##
|
|
## Returns:
|
|
## * Execution block number.
|
|
execution[].block_number.cint
|
|
|
|
func ETHExecutionPayloadHeaderGetGasLimit(
|
|
execution: ptr ExecutionPayloadHeader): cint {.exported.} =
|
|
## Obtains the gas limit of a given execution payload header.
|
|
##
|
|
## Parameters:
|
|
## * `execution` - Execution payload header.
|
|
##
|
|
## Returns:
|
|
## * Gas limit.
|
|
execution[].gas_limit.cint
|
|
|
|
func ETHExecutionPayloadHeaderGetGasUsed(
|
|
execution: ptr ExecutionPayloadHeader): cint {.exported.} =
|
|
## Obtains the gas used of a given execution payload header.
|
|
##
|
|
## Parameters:
|
|
## * `execution` - Execution payload header.
|
|
##
|
|
## Returns:
|
|
## * Gas used.
|
|
execution[].gas_used.cint
|
|
|
|
func ETHExecutionPayloadHeaderGetTimestamp(
|
|
execution: ptr ExecutionPayloadHeader): cint {.exported.} =
|
|
## Obtains the timestamp of a given execution payload header.
|
|
##
|
|
## Parameters:
|
|
## * `execution` - Execution payload header.
|
|
##
|
|
## Returns:
|
|
## * Execution block timestamp.
|
|
execution[].timestamp.cint
|
|
|
|
func ETHExecutionPayloadHeaderGetExtraDataBytes(
|
|
execution: ptr ExecutionPayloadHeader
|
|
): ptr UncheckedArray[byte] {.exported.} =
|
|
## Obtains the extra data buffer of a given execution payload header.
|
|
##
|
|
## * The returned value is allocated in the given execution payload header.
|
|
## It must neither be released nor written to, and the execution payload
|
|
## header must not be released while the returned value is in use.
|
|
##
|
|
## * Use `ETHExecutionPayloadHeaderGetNumExtraDataBytes`
|
|
## to obtain the length of the buffer.
|
|
##
|
|
## Parameters:
|
|
## * `execution` - Execution payload header.
|
|
##
|
|
## Returns:
|
|
## * Buffer with execution block extra data.
|
|
cast[ptr UncheckedArray[byte]](addr execution[].extra_data[0])
|
|
|
|
func ETHExecutionPayloadHeaderGetNumExtraDataBytes(
|
|
execution: ptr ExecutionPayloadHeader): cint {.exported.} =
|
|
## Obtains the extra data buffer's length of a given execution payload header.
|
|
##
|
|
## Parameters:
|
|
## * `execution` - Execution payload header.
|
|
##
|
|
## Returns:
|
|
## * Length of execution block extra data.
|
|
execution[].extra_data.len.cint
|
|
|
|
func ETHExecutionPayloadHeaderGetBaseFeePerGas(
|
|
execution: ptr ExecutionPayloadHeader): ptr UInt256 {.exported.} =
|
|
## Obtains the base fee per gas of a given execution payload header.
|
|
##
|
|
## * The returned value is allocated in the given execution payload header.
|
|
## It must neither be released nor written to, and the execution payload
|
|
## header must not be released while the returned value is in use.
|
|
##
|
|
## Parameters:
|
|
## * `execution` - Execution payload header.
|
|
##
|
|
## Returns:
|
|
## * Base fee per gas.
|
|
addr execution[].base_fee_per_gas
|
|
|
|
func ETHExecutionPayloadHeaderGetBlobGasUsed(
|
|
execution: ptr ExecutionPayloadHeader): cint {.exported.} =
|
|
## Obtains the blob gas used of a given execution payload header.
|
|
##
|
|
## Parameters:
|
|
## * `execution` - Execution payload header.
|
|
##
|
|
## Returns:
|
|
## * Blob gas used.
|
|
execution[].blob_gas_used.cint
|
|
|
|
func ETHExecutionPayloadHeaderGetExcessBlobGas(
|
|
execution: ptr ExecutionPayloadHeader): cint {.exported.} =
|
|
## Obtains the excess blob gas of a given execution payload header.
|
|
##
|
|
## Parameters:
|
|
## * `execution` - Execution payload header.
|
|
##
|
|
## Returns:
|
|
## * Excess blob gas.
|
|
execution[].excess_blob_gas.cint
|
|
|
|
type ETHExecutionBlockHeader = object
|
|
txRoot: Eth2Digest
|
|
withdrawalsRoot: Eth2Digest
|
|
|
|
proc ETHExecutionBlockHeaderCreateFromJson(
|
|
executionHash: ptr Eth2Digest,
|
|
blockHeaderJson: cstring): ptr ETHExecutionBlockHeader {.exported.} =
|
|
## Verifies that a JSON execution block header is valid and that it matches
|
|
## the given `executionHash`.
|
|
##
|
|
## * The JSON-RPC `eth_getBlockByHash` with params `[executionHash, false]`
|
|
## may be used to obtain execution block header data for a given execution
|
|
## block hash. Pass the response's `result` property to `blockHeaderJson`.
|
|
##
|
|
## * The execution block header must be destroyed with
|
|
## `ETHExecutionBlockHeaderDestroy` once no longer needed,
|
|
## to release memory.
|
|
##
|
|
## Parameters:
|
|
## * `executionHash` - Execution block hash.
|
|
## * `blockHeaderJson` - Buffer with JSON encoded header. NULL-terminated.
|
|
##
|
|
## Returns:
|
|
## * Pointer to an initialized execution block header - If successful.
|
|
## * `NULL` - If the given `blockHeaderJson` is malformed or incompatible.
|
|
##
|
|
## See:
|
|
## * https://ethereum.org/en/developers/docs/apis/json-rpc/#eth_getblockbyhash
|
|
let node =
|
|
try:
|
|
parseJson($blockHeaderJson)
|
|
except Exception:
|
|
return nil
|
|
var bdata: BlockObject
|
|
try:
|
|
fromJson(node, argName = "", bdata)
|
|
except KeyError, ValueError:
|
|
return nil
|
|
if bdata == nil:
|
|
return nil
|
|
|
|
# Sanity check
|
|
if bdata.hash.asEth2Digest != executionHash[]:
|
|
return nil
|
|
|
|
# Check fork consistency
|
|
static: doAssert totalSerializedFields(BlockObject) == 25,
|
|
"Only update this number once code is adjusted to check new fields!"
|
|
if bdata.baseFeePerGas.isNone and (
|
|
bdata.withdrawals.isSome or bdata.withdrawalsRoot.isSome or
|
|
bdata.blobGasUsed.isSome or bdata.excessBlobGas.isSome):
|
|
return nil
|
|
if bdata.withdrawalsRoot.isNone and (
|
|
bdata.blobGasUsed.isSome or bdata.excessBlobGas.isSome):
|
|
return nil
|
|
if bdata.withdrawals.isSome != bdata.withdrawalsRoot.isSome:
|
|
return nil
|
|
if bdata.blobGasUsed.isSome != bdata.excessBlobGas.isSome:
|
|
return nil
|
|
|
|
# Construct block header
|
|
static: # `GasInt` is signed. We only use it for hashing.
|
|
doAssert sizeof(int64) == sizeof(bdata.gasLimit)
|
|
doAssert sizeof(int64) == sizeof(bdata.gasUsed)
|
|
if distinctBase(bdata.timestamp) > int64.high.uint64:
|
|
return nil
|
|
if bdata.nonce.isNone:
|
|
return nil
|
|
let blockHeader = ExecutionBlockHeader(
|
|
parentHash: bdata.parentHash.asEth2Digest,
|
|
ommersHash: bdata.sha3Uncles.asEth2Digest,
|
|
coinbase: distinctBase(bdata.miner),
|
|
stateRoot: bdata.stateRoot.asEth2Digest,
|
|
txRoot: bdata.transactionsRoot.asEth2Digest,
|
|
receiptRoot: bdata.receiptsRoot.asEth2Digest,
|
|
bloom: distinctBase(bdata.logsBloom),
|
|
difficulty: bdata.difficulty,
|
|
blockNumber: distinctBase(bdata.number).u256,
|
|
gasLimit: cast[int64](bdata.gasLimit),
|
|
gasUsed: cast[int64](bdata.gasUsed),
|
|
timestamp: fromUnix(int64.saturate distinctBase(bdata.timestamp)),
|
|
extraData: distinctBase(bdata.extraData),
|
|
mixDigest: bdata.mixHash.asEth2Digest,
|
|
nonce: distinctBase(bdata.nonce.get),
|
|
fee: bdata.baseFeePerGas,
|
|
withdrawalsRoot:
|
|
if bdata.withdrawalsRoot.isSome:
|
|
some(bdata.withdrawalsRoot.get.asEth2Digest)
|
|
else:
|
|
none(ExecutionHash256),
|
|
blobGasUsed:
|
|
if bdata.blobGasUsed.isSome:
|
|
some distinctBase(bdata.blobGasUsed.get)
|
|
else:
|
|
none(uint64),
|
|
excessBlobGas:
|
|
if bdata.excessBlobGas.isSome:
|
|
some distinctBase(bdata.excessBlobGas.get)
|
|
else:
|
|
none(uint64))
|
|
if rlpHash(blockHeader) != executionHash[]:
|
|
return nil
|
|
|
|
let executionBlockHeader = ETHExecutionBlockHeader.new()
|
|
executionBlockHeader[] = ETHExecutionBlockHeader(
|
|
txRoot: blockHeader.txRoot,
|
|
withdrawalsRoot: blockHeader.withdrawalsRoot.get(ZERO_HASH))
|
|
executionBlockHeader.toUnmanagedPtr()
|
|
|
|
proc ETHExecutionBlockHeaderDestroy(
|
|
executionBlockHeader: ptr ETHExecutionBlockHeader) {.exported.} =
|
|
## Destroys an execution block header.
|
|
##
|
|
## * The execution block header must no longer be used after destruction.
|
|
##
|
|
## Parameters:
|
|
## * `executionBlockHeader` - Execution block header.
|
|
executionBlockHeader.destroy()
|
|
|
|
func ETHExecutionBlockHeaderGetTransactionsRoot(
|
|
executionBlockHeader: ptr ETHExecutionBlockHeader
|
|
): ptr Eth2Digest {.exported.} =
|
|
## Obtains the transactions MPT root of a given execution block header.
|
|
##
|
|
## * The returned value is allocated in the given execution block header.
|
|
## It must neither be released nor written to, and the execution block
|
|
## header must not be released while the returned value is in use.
|
|
##
|
|
## Parameters:
|
|
## * `executionBlockHeader` - Execution block header.
|
|
##
|
|
## Returns:
|
|
## * Execution transactions root.
|
|
addr executionBlockHeader[].txRoot
|
|
|
|
func ETHExecutionBlockHeaderGetWithdrawalsRoot(
|
|
executionBlockHeader: ptr ETHExecutionBlockHeader
|
|
): ptr Eth2Digest {.exported.} =
|
|
## Obtains the withdrawals MPT root of a given execution block header.
|
|
##
|
|
## * The returned value is allocated in the given execution block header.
|
|
## It must neither be released nor written to, and the execution block
|
|
## header must not be released while the returned value is in use.
|
|
##
|
|
## Parameters:
|
|
## * `executionBlockHeader` - Execution block header.
|
|
##
|
|
## Returns:
|
|
## * Execution withdrawals root.
|
|
addr executionBlockHeader[].withdrawalsRoot
|