nimbus-eth1/nimbus/utils/tx_pool/tx_item.nim

232 lines
7.7 KiB
Nim

# Nimbus
# Copyright (c) 2018 Status Research & Development GmbH
# Licensed under either of
# * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
# http://www.apache.org/licenses/LICENSE-2.0)
# * MIT license ([LICENSE-MIT](LICENSE-MIT) or
# http://opensource.org/licenses/MIT)
# at your option. This file may not be copied, modified, or distributed except
# according to those terms.
## Transaction Pool Item Container & Wrapper
## =========================================
##
import
std/[hashes, sequtils, strutils, times],
../ec_recover,
../utils_defs,
./tx_info,
eth/[common, keys],
stew/results
{.push raises: [Defect].}
type
GasPrice* = ##|
## Handy definition distinct from `GasInt` which is a commodity unit while
## the `GasPrice` is the commodity valuation per unit of gas, similar to a
## kind of currency.
distinct uint64
GasPriceEx* = ##\
## Similar to `GasPrice` but is allowed to be negative.
distinct int64
TxItemStatus* = enum ##\
## Current status of a transaction as seen by the pool.
txItemPending = 0
txItemStaged
txItemPacked
TxItemRef* = ref object of RootObj ##\
## Data container with transaction and meta data. Entries are *read-only*\
## by default, for some there is a setter available.
tx: Transaction ## Transaction data
itemID: Hash256 ## Transaction hash
timeStamp: Time ## Time when added
sender: EthAddress ## Sender account address
info: string ## Whatever
status: TxItemStatus ## Transaction status (setter available)
reject: TxInfo ## Reason for moving to waste basket
# ------------------------------------------------------------------------------
# Private, helpers for debugging and pretty printing
# ------------------------------------------------------------------------------
proc utcTime: Time =
getTime().utc.toTime
# ------------------------------------------------------------------------------
# Public helpers supporting distinct types
# ------------------------------------------------------------------------------
proc `$`*(a: GasPrice): string {.borrow.}
proc `<`*(a, b: GasPrice): bool {.borrow.}
proc `<=`*(a, b: GasPrice): bool {.borrow.}
proc `==`*(a, b: GasPrice): bool {.borrow.}
proc `+`*(a, b: GasPrice): GasPrice {.borrow.}
proc `-`*(a, b: GasPrice): GasPrice {.borrow.}
proc `$`*(a: GasPriceEx): string {.borrow.}
proc `<`*(a, b: GasPriceEx): bool {.borrow.}
proc `<=`*(a, b: GasPriceEx): bool {.borrow.}
proc `==`*(a, b: GasPriceEx): bool {.borrow.}
proc `+`*(a, b: GasPriceEx): GasPriceEx {.borrow.}
proc `-`*(a, b: GasPriceEx): GasPriceEx {.borrow.}
proc `+=`*(a: var GasPriceEx; b: GasPriceEx) {.borrow.}
proc `-=`*(a: var GasPriceEx; b: GasPriceEx) {.borrow.}
# Multiplication/division of *price* and *commodity unit*
proc `*`*(a: GasPrice; b: SomeUnsignedInt): GasPrice {.borrow.}
proc `*`*(a: SomeUnsignedInt; b: GasPrice): GasPrice {.borrow.}
proc `div`*(a: GasPrice; b: SomeUnsignedInt): GasPrice =
(a.uint64 div b).GasPrice # beware of zero denominator
proc `*`*(a: SomeInteger; b: GasPriceEx): GasPriceEx =
(a * b.int64).GasPriceEx # beware of under/overflow
# Mixed stuff, convenience ops
proc `-`*(a: GasPrice; b: SomeUnsignedInt): GasPrice {.borrow.}
proc `<`*(a: GasPriceEx; b: SomeSignedInt): bool =
a.int64 < b
proc `<`*(a: GasPriceEx|SomeSignedInt; b: GasPrice): bool =
if a.int64 < 0: true else: a.GasPrice < b
proc `<=`*(a: SomeSignedInt; b: GasPriceEx): bool =
a < b.int64
# ------------------------------------------------------------------------------
# Public functions, Constructor
# ------------------------------------------------------------------------------
proc init*(item: TxItemRef; status: TxItemStatus; info: string) =
## Update item descriptor.
item.info = info
item.status = status
item.timeStamp = utcTime()
item.reject = txInfoOk
proc new*(T: type TxItemRef; tx: Transaction; itemID: Hash256;
status: TxItemStatus; info: string): Result[T,void] =
## Create item descriptor.
let rc = tx.ecRecover
if rc.isErr:
return err()
ok(T(itemID: itemID,
tx: tx,
sender: rc.value,
timeStamp: utcTime(),
info: info,
status: status))
proc new*(T: type TxItemRef; tx: Transaction;
reject: TxInfo; status: TxItemStatus; info: string): T =
## Create incomplete item descriptor, so meta-data can be stored (e.g.
## for holding in the waste basket to be investigated later.)
T(tx: tx,
timeStamp: utcTime(),
info: info,
status: status)
# ------------------------------------------------------------------------------
# Public functions, Table ID helper
# ------------------------------------------------------------------------------
proc hash*(item: TxItemRef): Hash =
## Needed if `TxItemRef` is used as hash-`Table` index.
cast[pointer](item).hash
# ------------------------------------------------------------------------------
# Public functions, transaction getters
# ------------------------------------------------------------------------------
proc itemID*(tx: Transaction): Hash256 =
## Getter, transaction ID
tx.rlpHash
# core/types/transaction.go(297): func (tx *Transaction) Cost() *big.Int {
proc cost*(tx: Transaction): UInt256 =
## Getter (go/ref compat): gas * gasPrice + value.
(tx.gasPrice * tx.gasLimit).u256 + tx.value
# core/types/transaction.go(332): .. *Transaction) EffectiveGasTip(baseFee ..
# core/types/transaction.go(346): .. EffectiveGasTipValue(baseFee ..
proc effectiveGasTip*(tx: Transaction; baseFee: GasPrice): GasPriceEx =
## The effective miner gas tip for the globally argument `baseFee`. The
## result (which is a price per gas) might well be negative.
if tx.txType != TxEip1559:
(tx.gasPrice - baseFee.int64).GasPriceEx
else:
# London, EIP1559
min(tx.maxPriorityFee, tx.maxFee - baseFee.int64).GasPriceEx
proc effectiveGasTip*(tx: Transaction; baseFee: UInt256): GasPriceEx =
## Variant of `effectiveGasTip()`
tx.effectiveGasTip(baseFee.truncate(uint64).GasPrice)
# ------------------------------------------------------------------------------
# Public functions, item getters
# ------------------------------------------------------------------------------
proc dup*(item: TxItemRef): TxItemRef =
## Getter, provide contents copy
item.deepCopy
proc info*(item: TxItemRef): string =
## Getter
item.info
proc itemID*(item: TxItemRef): Hash256 =
## Getter
item.itemID
proc reject*(item: TxItemRef): TxInfo =
## Getter
item.reject
proc sender*(item: TxItemRef): EthAddress =
## Getter
item.sender
proc status*(item: TxItemRef): TxItemStatus =
## Getter
item.status
proc timeStamp*(item: TxItemRef): Time =
## Getter
item.timeStamp
proc tx*(item: TxItemRef): Transaction =
## Getter
item.tx
# ------------------------------------------------------------------------------
# Public functions, setters
# ------------------------------------------------------------------------------
proc `status=`*(item: TxItemRef; val: TxItemStatus) =
## Setter
item.status = val
proc `reject=`*(item: TxItemRef; val: TxInfo) =
## Setter
item.reject = val
# ------------------------------------------------------------------------------
# Public functions, pretty printing and debugging
# ------------------------------------------------------------------------------
proc `$`*(w: TxItemRef): string =
## Visualise item ID (use for debugging)
"<" & w.itemID.data.mapIt(it.toHex(2)).join[24 .. 31].toLowerAscii & ">"
# ------------------------------------------------------------------------------
# End
# ------------------------------------------------------------------------------