77 lines
2.4 KiB
Nim
77 lines
2.4 KiB
Nim
# Nimbus
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# Copyright (c) 2018 Status Research & Development GmbH
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# Licensed under either of
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# * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
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# http://www.apache.org/licenses/LICENSE-2.0)
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# * MIT license ([LICENSE-MIT](LICENSE-MIT) or
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# http://opensource.org/licenses/MIT)
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# at your option. This file may not be copied, modified, or distributed except
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# according to those terms.
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## Transaction Pool Tasklet: Recover From Waste Basket or Create
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## =============================================================
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##
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import
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../tx_desc,
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../tx_info,
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../tx_item,
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../tx_tabs,
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chronicles,
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eth/[common, keys],
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stew/keyed_queue
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{.push raises: [Defect].}
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logScope:
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topics = "tx-pool recover item"
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let
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nullSender = block:
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var rc: EthAddress
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rc
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# ------------------------------------------------------------------------------
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# Public functions
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# ------------------------------------------------------------------------------
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proc recoverItem*(xp: TxPoolRef; tx: Transaction; status = txItemPending;
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info = ""; acceptExisting = false): Result[TxItemRef,TxInfo]
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{.gcsafe,raises: [Defect,CatchableError].} =
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## Recover item from waste basket or create new. It is an error if the item
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## is in the buckets database, already.
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##
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## If thy argument `acceptExisting` is set `true` and the tx item is in the
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## bucket database already for any bucket, the fuction successds ok.
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let itemID = tx.itemID
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# Test whether the item is in the database, already
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if xp.txDB.byItemID.hasKey(itemID):
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if acceptExisting:
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return ok(xp.txDB.byItemID.eq(itemID).value)
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else:
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return err(txInfoErrAlreadyKnown)
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# Check whether the tx can be re-cycled from waste basket
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block:
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let rc = xp.txDB.byRejects.delete(itemID)
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if rc.isOk:
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let item = rc.value.data
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# must not be a waste tx without meta-data
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if item.sender != nullSender:
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let itemInfo = if info != "": info else: item.info
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item.init(status, itemInfo)
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return ok(item)
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# New item generated from scratch, e.g. with `nullSender`
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block:
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let rc = TxItemRef.new(tx, itemID, status, info)
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if rc.isOk:
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return ok(rc.value)
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err(txInfoErrInvalidSender)
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# ------------------------------------------------------------------------------
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# End
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# ------------------------------------------------------------------------------
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