nimbus-eth2/research/fakeee.nim

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## Fake execution engine API implementation useful for testing beacon node without a running execution node
# Nimbus
# Copyright (c) 2022-2024 Status Research & Development GmbH
# Licensed under either of
# * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE))
# * MIT license ([LICENSE-MIT](LICENSE-MIT))
# at your option.
# This file may not be copied, modified, or distributed except according to
# those terms.
import
std/typetraits,
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stew/byteutils,
json_rpc/[rpcserver, errors],
web3/[conversions, engine_api_types, eth_api_types],
chronicles
proc setupEngineAPI*(server: RpcServer) =
# https://github.com/ethereum/execution-apis/blob/v1.0.0-beta.3/src/engine/paris.md#engine_newpayloadv1
# cannot use `params` as param name. see https:#github.com/status-im/nim-json-rpc/issues/128
server.rpc("engine_newPayloadV1") do(payload: ExecutionPayloadV1) -> PayloadStatusV1:
info "engine_newPayloadV1",
number = $(distinctBase payload.blockNumber), hash = payload.blockHash
return PayloadStatusV1(
status: PayloadExecutionStatus.syncing,
)
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# https://github.com/ethereum/execution-apis/blob/v1.0.0-beta.3/src/engine/shanghai.md#engine_newpayloadv2
server.rpc("engine_newPayloadV2") do(payload: ExecutionPayloadV2) -> PayloadStatusV1:
info "engine_newPayloadV2", payload
return PayloadStatusV1(
status: PayloadExecutionStatus.syncing,
)
# https://github.com/ethereum/execution-apis/blob/v1.0.0-beta.3/src/engine/paris.md#engine_getpayloadv1
server.rpc("engine_getPayloadV1") do(payloadId: PayloadID) -> ExecutionPayloadV1:
info "engine_getPayloadV1",
id = payloadId.toHex
raise (ref InvalidRequest)(
code: engineApiUnknownPayload,
msg: "Unknown payload"
)
# https://github.com/ethereum/execution-apis/blob/v1.0.0-beta.3/src/engine/paris.md#engine_exchangetransitionconfigurationv1
server.rpc("engine_exchangeTransitionConfigurationV1") do(conf: TransitionConfigurationV1) -> TransitionConfigurationV1:
info "engine_exchangeTransitionConfigurationV1",
ttd = conf.terminalTotalDifficulty,
number = uint64(conf.terminalBlockNumber),
blockHash = conf.terminalBlockHash
return conf
# https://github.com/ethereum/execution-apis/blob/v1.0.0-beta.3/src/engine/paris.md#engine_forkchoiceupdatedv1
server.rpc("engine_forkchoiceUpdatedV1") do(
update: ForkchoiceStateV1,
payloadAttributes: Option[PayloadAttributesV1]) -> ForkchoiceUpdatedResponse:
info "engine_forkchoiceUpdatedV1",
update,
payloadAttributes
return ForkchoiceUpdatedResponse(
payloadStatus: PayloadStatusV1(
status: PayloadExecutionStatus.syncing))
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# https://github.com/ethereum/execution-apis/blob/v1.0.0-beta.3/src/engine/shanghai.md#engine_forkchoiceupdatedv2
server.rpc("engine_forkchoiceUpdatedV2") do(
forkchoiceState: ForkchoiceStateV1, payloadAttributes: Option[PayloadAttributesV2]) -> ForkchoiceUpdatedResponse:
info "engine_forkchoiceUpdatedV2",
forkchoiceState, payloadAttributes
return ForkchoiceUpdatedResponse(
payloadStatus: PayloadStatusV1(
status: PayloadExecutionStatus.syncing))
server.rpc("eth_getBlockByNumber") do(
quantityTag: string, fullTransactions: bool) -> JsonString:
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info "eth_getBlockByNumber", quantityTag, fullTransactions
return if quantityTag == "latest":
JrpcConv.encode(BlockObject(number: 1000.Quantity)).JsonString
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else:
"{}".JsonString
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server.rpc("eth_getBlockByHash") do(
data: string, fullTransactions: bool) -> BlockObject:
info "eth_getBlockByHash", data = toHex(data), fullTransactions
return BlockObject(number: 1000.Quantity)
server.rpc("eth_chainId") do() -> Quantity:
info "eth_chainId"
return 1.Quantity
when isMainModule:
let server = newRpcHttpServer(
# authHooks = @[httpJwtAuthHook, httpCorsHook],
)
server.addHttpServer(
initTAddress("127.0.0.1", 8551),
maxRequestBodySize = 16 * 1024 * 1024)
server.setupEngineAPI()
server.start()
when compiles(waitFor waitSignal(SIGINT)):
waitFor waitSignal(SIGINT)
waitFor server.stop()
else:
runForever()