mirror of https://github.com/status-im/nim-abc.git
41 lines
877 B
Nim
41 lines
877 B
Nim
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import pkg/questionable
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import ./hash
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export hash
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type
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Ack* = object
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previous: ?Hash
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transactions: seq[Hash]
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func init*(_: type Ack, transactions: openArray[Hash]): ?Ack =
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if transactions.len == 0:
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return none Ack
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some Ack(transactions: @transactions)
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func init*(_: type Ack,
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previous: Hash,
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transactions: openArray[Hash]): ?Ack =
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without var ack =? Ack.init(transactions):
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return none Ack
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ack.previous = previous.some
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some ack
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func previous*(ack: Ack): ?Hash =
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ack.previous
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func transactions*(ack: Ack): seq[Hash] =
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ack.transactions
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func toBytes*(ack: Ack): seq[byte] =
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let previous = ack.previous |? Hash.default
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result.add(previous.toBytes)
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result.add(ack.transactions.len.uint8)
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for transaction in ack.transactions:
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result.add(transaction.toBytes)
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func hash*(ack: Ack): Hash =
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hash(ack.toBytes)
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