mirror of https://github.com/status-im/nim-eth.git
42 lines
1.6 KiB
Nim
42 lines
1.6 KiB
Nim
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,
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req: BlocksRequest): seq[BlockHeader] {.gcsafe.} =
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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 db.getSuccessorHeader(foundBlock, foundBlock):
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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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