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Merge pull request #77 from horizontalsystems/peer_group_refactoring
Peer group refactoring
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,18 @@ | ||
| class BlockHelper { | ||
| private let storage: ISpvStorage | ||
| private let network: INetwork | ||
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| init(storage: ISpvStorage, network: INetwork) { | ||
| self.storage = storage | ||
| self.network = network | ||
| } | ||
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| } | ||
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| extension BlockHelper: IBlockHelper { | ||
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| var lastBlockHeader: BlockHeader { | ||
| return storage.lastBlockHeader ?? network.checkpointBlock | ||
| } | ||
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| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,32 @@ | ||
| class BlockValidator { | ||
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| func validate(blockHeaders: [BlockHeader], from blockHeader: BlockHeader) throws { | ||
| guard let firstBlockHeader = blockHeaders.first else { | ||
| throw ValidationError.invalidChain | ||
| } | ||
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| guard firstBlockHeader.hashHex == blockHeader.hashHex else { | ||
| throw ValidationError.forkDetected | ||
| } | ||
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| var previousHeader = blockHeader | ||
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| for blockHeader in blockHeaders.dropFirst() { | ||
| guard blockHeader.parentHash == previousHeader.hashHex else { | ||
| throw ValidationError.invalidChain | ||
| } | ||
| previousHeader = blockHeader | ||
| } | ||
| } | ||
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| } | ||
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| extension BlockValidator { | ||
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| enum ValidationError: Error { | ||
| case forkDetected | ||
| case invalidChain | ||
| case invalidProofOfWork | ||
| } | ||
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| } |
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