mirror of https://github.com/status-im/nim-eth.git
53 lines
2.2 KiB
Nim
53 lines
2.2 KiB
Nim
# nim-eth
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# Copyright (c) 2018-2021 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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import
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eth/common/[eth_types, state_accessors]
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# TODO: Perhaps we can move this to eth-common
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proc getBlockHeaders*(db: AbstractChainDB, req: BlocksRequest): seq[BlockHeader]
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{.gcsafe, raises: [RlpError, Defect].} =
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result = newSeqOfCap[BlockHeader](req.maxResults)
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var foundBlock: BlockHeader
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if db.getBlockHeader(req.startBlock, foundBlock):
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result.add foundBlock
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while uint64(result.len) < req.maxResults:
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if not req.reverse:
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if not db.getSuccessorHeader(foundBlock, foundBlock, req.skip):
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break
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else:
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if not db.getAncestorHeader(foundBlock, foundBlock, req.skip):
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break
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result.add foundBlock
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template fetcher*(fetcherName, fetchingFunc, InputType, ResultType: untyped) =
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proc fetcherName*(db: AbstractChainDB,
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lookups: openarray[InputType]): seq[ResultType] {.gcsafe.} =
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for lookup in lookups:
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let fetched = fetchingFunc(db, lookup)
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if fetched.hasData:
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# TODO: should there be an else clause here.
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# Is the peer responsible of figuring out that
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# some of the requested items were not found?
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result.add deref(fetched)
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fetcher getContractCodes, getContractCode, ContractCodeRequest, Blob
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fetcher getBlockBodies, getBlockBody, KeccakHash, BlockBody
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fetcher getStorageNodes, getStorageNode, KeccakHash, Blob
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fetcher getReceipts, getReceipt, KeccakHash, Receipt
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fetcher getProofs, getProof, ProofRequest, Blob
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fetcher getHeaderProofs, getHeaderProof, ProofRequest, Blob
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proc getHelperTrieProofs*(db: AbstractChainDB,
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reqs: openarray[HelperTrieProofRequest],
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outNodes: var seq[Blob], outAuxData: var seq[Blob]) =
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discard
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