mirror of https://github.com/status-im/nim-abc.git
Find all transactions that precede an acknowledgement
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abc/past.nim
15
abc/past.nim
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@ -1,11 +1,20 @@
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import ./txstore
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func past*(store: TxStore, txHash: TxHash, accumulator: var seq[TxHash]) =
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func past(store: TxStore, txHash: TxHash, accumulator: var seq[TxHash]) =
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if transaction =? store[txHash]:
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for (hash, _) in transaction.inputs:
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if not accumulator.contains hash:
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accumulator.add(hash)
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store.past(hash, accumulator)
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func past*(store: TxStore, txHash: TxHash): seq[TxHash] =
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store.past(txHash, result)
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func past(store: TxStore, ackHash: AckHash, accumulator: var seq[TxHash]) =
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if ack =? store[ackHash]:
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if previous =? ack.previous:
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store.past(previous, accumulator)
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for txHash in ack.transactions:
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if not accumulator.contains txHash:
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accumulator.add(txHash)
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store.past(txHash, accumulator)
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func past*(store: TxStore, hash: TxHash|AckHash): seq[TxHash] =
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store.past(hash, result)
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@ -3,13 +3,14 @@ import abc/past
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import ./basics
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import ./alicebob
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suite "Past":
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suite "Past transactions and acknowledgements":
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let genesis = Transaction.genesis
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let alice = PublicKey.alice
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let bob = PublicKey.bob
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let victor = PublicKey.victor
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var tx1, tx2, tx3: Transaction
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var ack1, ack2: Ack
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setup:
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tx1 = !Transaction.init({genesis.hash: alice}, {bob: 100.u256}, victor)
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@ -19,6 +20,8 @@ suite "Past":
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{alice: 200.u256},
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victor
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)
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ack1 = !Ack.init([tx1.hash, tx2.hash], victor)
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ack2 = !Ack.init(ack1.hash, [tx3.hash], victor)
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test "finds all transactions that precede a transaction":
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var store = TxStore.init(genesis)
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@ -30,3 +33,10 @@ suite "Past":
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test "past is empty when transaction cannot be found":
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let store = TxStore.init(genesis)
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check store.past(tx1.hash) == []
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test "finds all transactions that precede an acknowledgement":
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var store = TxStore.init(genesis)
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store.add(tx1, tx2, tx3)
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store.add(ack1, ack2)
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check store.past(ack1.hash) == [tx1.hash, genesis.hash, tx2.hash]
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check store.past(ack2.hash) == [tx1.hash, genesis.hash, tx2.hash, tx3.hash]
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