nimbus-eth1/fluffy/rpc/rpc_eth_api.nim

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# Nimbus
# Copyright (c) 2021-2022 Status Research & Development GmbH
# Licensed and distributed under either of
# * MIT license (license terms in the root directory or at https://opensource.org/licenses/MIT).
# * Apache v2 license (license terms in the root directory or at https://www.apache.org/licenses/LICENSE-2.0).
# at your option. This file may not be copied, modified, or distributed except according to those terms.
{.push raises: [Defect].}
import
std/[times, sequtils, typetraits],
json_rpc/[rpcproxy, rpcserver], stew/byteutils,
web3/conversions, # sigh, for FixedBytes marshalling
eth/[common/eth_types, rlp],
../../nimbus/rpc/[rpc_types, hexstrings, filters],
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../../nimbus/transaction,
../../nimbus/common/chain_config,
../network/history/[history_network, history_content]
# Subset of Eth JSON-RPC API: https://eth.wiki/json-rpc/API
# Supported subset will eventually be found here:
# https://github.com/ethereum/stateless-ethereum-specs/blob/master/portal-network.md#json-rpc-api
#
# In order to already support these calls before every part of the Portal
# Network is up, one plan is to get the data directly from an external client
# through RPC calls. Practically just playing a proxy to that client.
# Can be done by just forwarding the rpc call, or by adding a call here, but
# that would introduce a unnecessary serializing/deserializing step.
# Some similar code as from nimbus `rpc_utils`, but avoiding that import as it
# brings in a lot more. Should restructure `rpc_utils` a bit before using that.
func toHash*(value: array[32, byte]): Hash256 =
result.data = value
func toHash*(value: EthHashStr): Hash256 {.raises: [Defect, ValueError].} =
hexToPaddedByteArray[32](value.string).toHash
func init*(
T: type TransactionObject,
tx: Transaction, header: BlockHeader, txIndex: int):
T {.raises: [Defect, ValidationError].} =
TransactionObject(
blockHash: some(header.blockHash),
blockNumber: some(encodeQuantity(header.blockNumber)),
`from`: tx.getSender(),
gas: encodeQuantity(tx.gasLimit.uint64),
gasPrice: encodeQuantity(tx.gasPrice.uint64),
hash: tx.rlpHash,
input: tx.payload,
nonce: encodeQuantity(tx.nonce.uint64),
to: some(tx.destination),
transactionIndex: some(encodeQuantity(txIndex.uint64)),
value: encodeQuantity(tx.value),
v: encodeQuantity(tx.V.uint),
r: encodeQuantity(tx.R),
s: encodeQuantity(tx.S)
)
# Note: Similar as `populateBlockObject` from rpc_utils, but lacking the
# total difficulty
func init*(
T: type BlockObject,
header: BlockHeader, body: BlockBody,
fullTx = true, isUncle = false):
T {.raises: [Defect, ValidationError].} =
let blockHash = header.blockHash
var blockObject = BlockObject(
number: some(encodeQuantity(header.blockNumber)),
hash: some(blockHash),
parentHash: header.parentHash,
nonce: some(hexDataStr(header.nonce)),
sha3Uncles: header.ommersHash,
logsBloom: FixedBytes[256] header.bloom,
transactionsRoot: header.txRoot,
stateRoot: header.stateRoot,
receiptsRoot: header.receiptRoot,
miner: header.coinbase,
difficulty: encodeQuantity(header.difficulty),
extraData: hexDataStr(header.extraData),
# TODO: This is optional according to
# https://playground.open-rpc.org/?schemaUrl=https://raw.githubusercontent.com/ethereum/eth1.0-apis/assembled-spec/openrpc.json
# So we should probably change `BlockObject`.
totalDifficulty: encodeQuantity(UInt256.low()),
gasLimit: encodeQuantity(header.gasLimit.uint64),
gasUsed: encodeQuantity(header.gasUsed.uint64),
timestamp: encodeQuantity(header.timestamp.toUnix.uint64)
)
let size = sizeof(BlockHeader) - sizeof(Blob) + header.extraData.len
blockObject.size = encodeQuantity(size.uint)
if not isUncle:
blockObject.uncles =
body.uncles.map(proc(h: BlockHeader): Hash256 = h.blockHash)
if fullTx:
var i = 0
for tx in body.transactions:
# ValidationError from tx.getSender in TransactionObject.init
blockObject.transactions.add %(TransactionObject.init(tx, header, i))
inc i
else:
for tx in body.transactions:
blockObject.transactions.add %(keccakHash(rlp.encode(tx)))
blockObject
proc installEthApiHandlers*(
# Currently only HistoryNetwork needed, later we might want a master object
# holding all the networks.
rpcServerWithProxy: var RpcProxy, historyNetwork: HistoryNetwork)
{.raises: [Defect, CatchableError].} =
# Supported API
rpcServerWithProxy.registerProxyMethod("eth_blockNumber")
rpcServerWithProxy.registerProxyMethod("eth_call")
# rpcServerWithProxy.registerProxyMethod("eth_chainId")
rpcServerWithProxy.registerProxyMethod("eth_estimateGas")
rpcServerWithProxy.registerProxyMethod("eth_feeHistory")
rpcServerWithProxy.registerProxyMethod("eth_getBalance")
# rpcServerWithProxy.registerProxyMethod("eth_getBlockByHash")
# rpcServerWithProxy.registerProxyMethod("eth_getBlockByNumber")
# rpcServerWithProxy.registerProxyMethod("eth_getBlockTransactionCountByHash")
rpcServerWithProxy.registerProxyMethod("eth_getBlockTransactionCountByNumber")
rpcServerWithProxy.registerProxyMethod("eth_getCode")
rpcServerWithProxy.registerProxyMethod("eth_getRawTransactionByHash")
rpcServerWithProxy.registerProxyMethod("eth_getRawTransactionByBlockHashAndIndex")
rpcServerWithProxy.registerProxyMethod("eth_getRawTransactionByBlockNumberAndIndex")
rpcServerWithProxy.registerProxyMethod("eth_getStorageAt")
rpcServerWithProxy.registerProxyMethod("eth_getTransactionByBlockHashAndIndex")
rpcServerWithProxy.registerProxyMethod("eth_getTransactionByBlockNumberAndIndex")
rpcServerWithProxy.registerProxyMethod("eth_getTransactionByHash")
rpcServerWithProxy.registerProxyMethod("eth_getTransactionCount")
rpcServerWithProxy.registerProxyMethod("eth_getTransactionReceipt")
rpcServerWithProxy.registerProxyMethod("eth_getUncleByBlockHashAndIndex")
rpcServerWithProxy.registerProxyMethod("eth_getUncleByBlockNumberAndIndex")
rpcServerWithProxy.registerProxyMethod("eth_getUncleCountByBlockHash")
rpcServerWithProxy.registerProxyMethod("eth_getUncleCountByBlockNumber")
rpcServerWithProxy.registerProxyMethod("eth_getProof")
rpcServerWithProxy.registerProxyMethod("eth_sendRawTransaction")
# Optional API
rpcServerWithProxy.registerProxyMethod("eth_gasPrice")
rpcServerWithProxy.registerProxyMethod("eth_getFilterChanges")
rpcServerWithProxy.registerProxyMethod("eth_getFilterLogs")
# rpcServerWithProxy.registerProxyMethod("eth_getLogs")
rpcServerWithProxy.registerProxyMethod("eth_newBlockFilter")
rpcServerWithProxy.registerProxyMethod("eth_newFilter")
rpcServerWithProxy.registerProxyMethod("eth_newPendingTransactionFilter")
rpcServerWithProxy.registerProxyMethod("eth_pendingTransactions")
rpcServerWithProxy.registerProxyMethod("eth_syncing")
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rpcServerWithProxy.registerProxyMethod("eth_uninstallFilter")
# Supported API through the Portal Network
rpcServerWithProxy.rpc("eth_chainId") do() -> HexQuantityStr:
# The Portal Network can only support MainNet at the moment
return encodeQuantity(distinctBase(MainNet.ChainId))
rpcServerWithProxy.rpc("eth_getBlockByHash") do(
data: EthHashStr, fullTransactions: bool) -> Option[BlockObject]:
## Returns information about a block by hash.
##
## data: Hash of a block.
## fullTransactions: If true it returns the full transaction objects, if
## false only the hashes of the transactions.
##
## Returns BlockObject or nil when no block was found.
let
blockHash = data.toHash()
(header, body) = (await historyNetwork.getBlock(blockHash)).valueOr:
return none(BlockObject)
return some(BlockObject.init(header, body))
# TODO: add test to local testnet, it requires activating accumulator
# in testnet script
rpcServerWithProxy.rpc("eth_getBlockByNumber") do(
quantityTag: string, fullTransactions: bool) -> Option[BlockObject]:
# TODO: for now support only numeric queries, as it is not obvious how to
# retrieve pending or even latest block.
if not isValidHexQuantity(quantityTag):
raise newException(ValueError, "Provided tag should be valid hex number")
let
blockNumber = fromHex(UInt256, quantityTag)
maybeBlock = (await historyNetwork.getBlock(blockNumber)).valueOr:
raise newException(ValueError, error)
if maybeBlock.isNone():
return none(BlockObject)
else:
let (header, body) = maybeBlock.get()
return some(BlockObject.init(header, body))
rpcServerWithProxy.rpc("eth_getBlockTransactionCountByHash") do(
data: EthHashStr) -> HexQuantityStr:
## Returns the number of transactions in a block from a block matching the
## given block hash.
##
## data: hash of a block
## Returns integer of the number of transactions in this block.
let
blockHash = data.toHash()
(_, body) = (await historyNetwork.getBlock(blockHash)).valueOr:
raise newException(ValueError, "Could not find block with requested hash")
var txCount: uint = 0
for tx in body.transactions:
txCount.inc()
return encodeQuantity(txCount)
# Note: can't implement this yet as the fluffy node doesn't know the relation
# of tx hash -> block number -> block hash, in order to get the receipt
# from from the block with that block hash. The Canonical Indices Network
# would need to be implemented to get this information.
# rpcServerWithProxy.rpc("eth_getTransactionReceipt") do(
# data: EthHashStr) -> Option[ReceiptObject]:
rpcServerWithProxy.rpc("eth_getLogs") do(
filterOptions: FilterOptions) -> seq[FilterLog]:
if filterOptions.blockHash.isNone():
# Currently only queries by blockhash are supported.
# To support range queries the Indicies network is required.
raise newException(ValueError,
"Unsupported query: Only `blockHash` queries are currently supported")
let hash = filterOptions.blockHash.unsafeGet()
let header = (await historyNetwork.getVerifiedBlockHeader(hash)).valueOr:
raise newException(ValueError,
"Could not find header with requested hash")
if headerBloomFilter(header, filterOptions.address, filterOptions.topics):
# TODO: These queries could be done concurrently, investigate if there
# are no assumptions about usage of concurrent queries on portal
# wire protocol level
let
body = (await historyNetwork.getBlockBody(hash, header)).valueOr:
raise newException(ValueError,
"Could not find block body for requested hash")
receipts = (await historyNetwork.getReceipts(hash, header)).valueOr:
raise newException(ValueError,
"Could not find receipts for requested hash")
logs = deriveLogs(header, body.transactions, receipts)
filteredLogs = filterLogs(
logs, filterOptions.address, filterOptions.topics)
return filteredLogs
else:
# bloomfilter returned false, there are no logs matching the criteria
return @[]