232 lines
7.7 KiB
Nim
232 lines
7.7 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 Item Container & Wrapper
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## =========================================
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##
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import
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std/[hashes, sequtils, strutils, times],
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../ec_recover,
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../utils_defs,
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./tx_info,
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eth/[common, keys],
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stew/results
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{.push raises: [Defect].}
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type
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GasPrice* = ##|
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## Handy definition distinct from `GasInt` which is a commodity unit while
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## the `GasPrice` is the commodity valuation per unit of gas, similar to a
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## kind of currency.
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distinct uint64
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GasPriceEx* = ##\
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## Similar to `GasPrice` but is allowed to be negative.
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distinct int64
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TxItemStatus* = enum ##\
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## Current status of a transaction as seen by the pool.
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txItemPending = 0
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txItemStaged
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txItemPacked
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TxItemRef* = ref object of RootObj ##\
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## Data container with transaction and meta data. Entries are *read-only*\
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## by default, for some there is a setter available.
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tx: Transaction ## Transaction data
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itemID: Hash256 ## Transaction hash
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timeStamp: Time ## Time when added
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sender: EthAddress ## Sender account address
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info: string ## Whatever
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status: TxItemStatus ## Transaction status (setter available)
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reject: TxInfo ## Reason for moving to waste basket
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# ------------------------------------------------------------------------------
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# Private, helpers for debugging and pretty printing
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# ------------------------------------------------------------------------------
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proc utcTime: Time =
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getTime().utc.toTime
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# ------------------------------------------------------------------------------
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# Public helpers supporting distinct types
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# ------------------------------------------------------------------------------
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proc `$`*(a: GasPrice): string {.borrow.}
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proc `<`*(a, b: GasPrice): bool {.borrow.}
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proc `<=`*(a, b: GasPrice): bool {.borrow.}
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proc `==`*(a, b: GasPrice): bool {.borrow.}
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proc `+`*(a, b: GasPrice): GasPrice {.borrow.}
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proc `-`*(a, b: GasPrice): GasPrice {.borrow.}
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proc `$`*(a: GasPriceEx): string {.borrow.}
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proc `<`*(a, b: GasPriceEx): bool {.borrow.}
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proc `<=`*(a, b: GasPriceEx): bool {.borrow.}
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proc `==`*(a, b: GasPriceEx): bool {.borrow.}
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proc `+`*(a, b: GasPriceEx): GasPriceEx {.borrow.}
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proc `-`*(a, b: GasPriceEx): GasPriceEx {.borrow.}
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proc `+=`*(a: var GasPriceEx; b: GasPriceEx) {.borrow.}
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proc `-=`*(a: var GasPriceEx; b: GasPriceEx) {.borrow.}
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# Multiplication/division of *price* and *commodity unit*
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proc `*`*(a: GasPrice; b: SomeUnsignedInt): GasPrice {.borrow.}
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proc `*`*(a: SomeUnsignedInt; b: GasPrice): GasPrice {.borrow.}
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proc `div`*(a: GasPrice; b: SomeUnsignedInt): GasPrice =
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(a.uint64 div b).GasPrice # beware of zero denominator
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proc `*`*(a: SomeInteger; b: GasPriceEx): GasPriceEx =
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(a * b.int64).GasPriceEx # beware of under/overflow
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# Mixed stuff, convenience ops
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proc `-`*(a: GasPrice; b: SomeUnsignedInt): GasPrice {.borrow.}
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proc `<`*(a: GasPriceEx; b: SomeSignedInt): bool =
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a.int64 < b
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proc `<`*(a: GasPriceEx|SomeSignedInt; b: GasPrice): bool =
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if a.int64 < 0: true else: a.GasPrice < b
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proc `<=`*(a: SomeSignedInt; b: GasPriceEx): bool =
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a < b.int64
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# ------------------------------------------------------------------------------
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# Public functions, Constructor
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# ------------------------------------------------------------------------------
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proc init*(item: TxItemRef; status: TxItemStatus; info: string) =
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## Update item descriptor.
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item.info = info
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item.status = status
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item.timeStamp = utcTime()
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item.reject = txInfoOk
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proc new*(T: type TxItemRef; tx: Transaction; itemID: Hash256;
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status: TxItemStatus; info: string): Result[T,void] =
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## Create item descriptor.
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let rc = tx.ecRecover
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if rc.isErr:
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return err()
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ok(T(itemID: itemID,
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tx: tx,
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sender: rc.value,
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timeStamp: utcTime(),
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info: info,
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status: status))
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proc new*(T: type TxItemRef; tx: Transaction;
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reject: TxInfo; status: TxItemStatus; info: string): T =
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## Create incomplete item descriptor, so meta-data can be stored (e.g.
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## for holding in the waste basket to be investigated later.)
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T(tx: tx,
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timeStamp: utcTime(),
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info: info,
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status: status)
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# ------------------------------------------------------------------------------
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# Public functions, Table ID helper
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# ------------------------------------------------------------------------------
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proc hash*(item: TxItemRef): Hash =
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## Needed if `TxItemRef` is used as hash-`Table` index.
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cast[pointer](item).hash
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# ------------------------------------------------------------------------------
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# Public functions, transaction getters
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# ------------------------------------------------------------------------------
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proc itemID*(tx: Transaction): Hash256 =
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## Getter, transaction ID
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tx.rlpHash
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# core/types/transaction.go(297): func (tx *Transaction) Cost() *big.Int {
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proc cost*(tx: Transaction): UInt256 =
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## Getter (go/ref compat): gas * gasPrice + value.
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(tx.gasPrice * tx.gasLimit).u256 + tx.value
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# core/types/transaction.go(332): .. *Transaction) EffectiveGasTip(baseFee ..
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# core/types/transaction.go(346): .. EffectiveGasTipValue(baseFee ..
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proc effectiveGasTip*(tx: Transaction; baseFee: GasPrice): GasPriceEx =
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## The effective miner gas tip for the globally argument `baseFee`. The
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## result (which is a price per gas) might well be negative.
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if tx.txType != TxEip1559:
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(tx.gasPrice - baseFee.int64).GasPriceEx
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else:
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# London, EIP1559
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min(tx.maxPriorityFee, tx.maxFee - baseFee.int64).GasPriceEx
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proc effectiveGasTip*(tx: Transaction; baseFee: UInt256): GasPriceEx =
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## Variant of `effectiveGasTip()`
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tx.effectiveGasTip(baseFee.truncate(uint64).GasPrice)
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# ------------------------------------------------------------------------------
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# Public functions, item getters
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# ------------------------------------------------------------------------------
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proc dup*(item: TxItemRef): TxItemRef =
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## Getter, provide contents copy
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item.deepCopy
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proc info*(item: TxItemRef): string =
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## Getter
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item.info
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proc itemID*(item: TxItemRef): Hash256 =
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## Getter
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item.itemID
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proc reject*(item: TxItemRef): TxInfo =
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## Getter
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item.reject
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proc sender*(item: TxItemRef): EthAddress =
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## Getter
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item.sender
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proc status*(item: TxItemRef): TxItemStatus =
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## Getter
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item.status
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proc timeStamp*(item: TxItemRef): Time =
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## Getter
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item.timeStamp
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proc tx*(item: TxItemRef): Transaction =
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## Getter
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item.tx
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# ------------------------------------------------------------------------------
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# Public functions, setters
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# ------------------------------------------------------------------------------
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proc `status=`*(item: TxItemRef; val: TxItemStatus) =
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## Setter
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item.status = val
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proc `reject=`*(item: TxItemRef; val: TxInfo) =
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## Setter
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item.reject = val
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# ------------------------------------------------------------------------------
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# Public functions, pretty printing and debugging
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# ------------------------------------------------------------------------------
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proc `$`*(w: TxItemRef): string =
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## Visualise item ID (use for debugging)
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"<" & w.itemID.data.mapIt(it.toHex(2)).join[24 .. 31].toLowerAscii & ">"
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# ------------------------------------------------------------------------------
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# End
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# ------------------------------------------------------------------------------
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