# Nimbus # Copyright (c) 2018-2024 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. import std/[algorithm, random, sequtils, strformat, strutils, tables, times], ../nimbus/core/chain, # must be early (compilation annoyance) ../nimbus/common/common, ../nimbus/core/[casper, tx_pool, tx_pool/tx_item], ../nimbus/config, ./test_txpool/[helpers, setup, sign_helper], chronos, eth/[keys, p2p], stew/[keyed_queue, sorted_set], stint, unittest2 const prngSeed = 42 # 75% <= #local/#remote <= 1/75% # note: by law of big numbers, the ratio will exceed any upper or lower # on a +1/-1 random walk if running long enough (with expectation # value 0) randInitRatioBandPC = 75 # 95% <= #remote-deleted/#remote-present <= 1/95% deletedItemsRatioBandPC = 95 # With a large enough block size, decreasing it should not decrease the # profitability (very much) as the number of blocks availabe increases # (and a better choice might be available?) A good value for the next # parameter should be above 100%. decreasingBlockProfitRatioPC = 92 # Make some percentage of the accounts local accouns. accountExtractPC = 10 var minGasPrice = GasPrice.high maxGasPrice = GasPrice.low prng = prngSeed.initRand # To be set up in runTxLoader() statCount: array[TxItemStatus,int] # per status bucket txList: seq[TxItemRef] effGasTips: seq[GasPriceEx] # Running block chain bcCom: CommonRef # Accounts to be considered local localAccounts: seq[EthAddress] # ------------------------------------------------------------------------------ # Helpers # ------------------------------------------------------------------------------ proc randStatusRatios: seq[int] = for n in 1 .. statCount.len: let inx = (n mod statCount.len).TxItemStatus prv = (n - 1).TxItemStatus if statCount[inx] == 0: result.add int.high else: result.add (statCount[prv] * 100 / statCount[inx]).int proc randStatus: TxItemStatus = result = prng.rand(TxItemStatus.high.ord).TxItemStatus statCount[result].inc template wrapException(info: string; action: untyped) = try: action except CatchableError: raiseAssert info & " has problems: " & getCurrentExceptionMsg() proc addOrFlushGroupwise(xp: TxPoolRef; grpLen: int; seen: var seq[TxItemRef]; w: TxItemRef; noisy = true): bool = # to be run as call back inside `itemsApply()` wrapException("addOrFlushGroupwise()"): seen.add w if grpLen <= seen.len: # clear waste basket discard xp.txDB.flushRejects # flush group-wise let xpLen = xp.nItems.total noisy.say "*** updateSeen: deleting ", seen.mapIt($it.itemID).join(" ") for item in seen: doAssert xp.txDB.dispose(item,txInfoErrUnspecified) doAssert xpLen == seen.len + xp.nItems.total doAssert seen.len == xp.nItems.disposed seen.setLen(0) # clear waste basket discard xp.txDB.flushRejects return true # ------------------------------------------------------------------------------ # Test Runners # ------------------------------------------------------------------------------ proc runTxLoader() = # Reset/initialise statCount.reset txList.reset effGasTips.reset suite "TxPool: Transactions from file capture": var xp: TxPoolRef nTxs: int test "Import txs for pooling": (bcCom, xp, nTxs) = setupTxPool(randStatus) # Extract some of the least profitable accounts and hold them so # they could be made local at a later stage let accr = xp.accountRanks nExtract = (accr.remote.len * accountExtractPC + 50) div 100 localAccounts = accr.remote[accr.remote.len - nExtract .. ^1] # Make sure that sample extraction from file was ok check nTxs == xp.nItems.total # Set txs to pseudo random status check xp.verify.isOk xp.setItemStatusFromInfo # Boundary conditions regarding nonces might be violated by running # setItemStatusFromInfo() => xp.txDB.verify() rather than xp.verify() check xp.txDB.verify.isOk check txList.len == 0 check xp.nItems.disposed == 0 #noisy.say "***", # "Latest item: <", xp.txDB.byItemID.last.value.data.info, ">" check xp.nItems.total == foldl(@[0]&statCount.toSeq, a+b) # ^^^ sum up statCount[] values # make sure that PRNG did not go bonkers for statusRatio in randStatusRatios(): check randInitRatioBandPC < statusRatio check statusRatio < (10000 div randInitRatioBandPC) # Load txList[] txList = xp.toItems check txList.len == xp.nItems.total for item in txList: if item.tx.gasPrice < minGasPrice and 0 < item.tx.gasPrice: minGasPrice = item.tx.gasPrice.GasPrice if maxGasPrice < item.tx.gasPrice.GasPrice: maxGasPrice = item.tx.gasPrice.GasPrice check 0.GasPrice <= minGasPrice check minGasPrice <= maxGasPrice proc runTxPoolTests(noisy = false) = let elapNoisy = false suite "TxPool: Play with pool functions and primitives": block: const groupLen = 13 let veryNoisy = noisy and false test "Load/forward walk ID queue, deleting groups of at most {groupLen}": var xq = bcCom.toTxPool(txList, noisy = noisy) seen: seq[TxItemRef] # Set txs to pseudo random status xq.setItemStatusFromInfo check xq.txDB.verify.isOk elapNoisy.showElapsed("Forward delete-walk ID queue"): for item in xq.txDB.byItemID.nextValues: if not xq.addOrFlushGroupwise(groupLen, seen, item, veryNoisy): break check xq.txDB.verify.isOk check seen.len == xq.nItems.total check seen.len < groupLen test &"Load/reverse walk ID queue, " & &"deleting in groups of at most {groupLen}": var xq = bcCom.toTxPool(txList, noisy = noisy) seen: seq[TxItemRef] # Set txs to pseudo random status xq.setItemStatusFromInfo check xq.txDB.verify.isOk elapNoisy.showElapsed("Revese delete-walk ID queue"): for item in xq.txDB.byItemID.nextValues: if not xq.addOrFlushGroupwise(groupLen, seen, item, veryNoisy): break check xq.txDB.verify.isOk check seen.len == xq.nItems.total check seen.len < groupLen block: var xq = TxPoolRef.new(bcCom) testTxs: array[5,(TxItemRef,Transaction,Transaction)] test "Superseding txs with sender and nonce variants": var testInx = 0 let testBump = xq.priceBump lastBump = testBump - 1 # implies underpriced item # load a set of suitable txs into testTxs[] for n in 0 ..< txList.len: let item = txList[n] bump = if testInx < testTxs.high: testBump else: lastBump rc = item.txModPair(testInx,bump.int) if not rc[0].isNil: testTxs[testInx] = rc testInx.inc if testTxs.high < testInx: break # verify that test does not degenerate check testInx == testTxs.len check 0 < lastBump # => 0 < testBump # insert some txs for triple in testTxs: xq.add(PooledTransaction(tx: triple[1]), triple[0].info) check xq.nItems.total == testTxs.len check xq.nItems.disposed == 0 let infoLst = testTxs.toSeq.mapIt(it[0].info).sorted check infoLst == xq.toItems.toSeq.mapIt(it.info).sorted # re-insert modified transactions for triple in testTxs: xq.add(PooledTransaction(tx: triple[2]), "alt " & triple[0].info) check xq.nItems.total == testTxs.len check xq.nItems.disposed == testTxs.len if false: # Temporarily disabled, see `supersede` in `tx_add.nim` # last update item was underpriced, so it must not have been # replaced var altLst = testTxs.toSeq.mapIt("alt " & it[0].info) altLst[^1] = testTxs[^1][0].info check altLst.sorted == xq.toItems.toSeq.mapIt(it.info).sorted test "Deleting tx => also delete higher nonces": let # From the data base, get the one before last item. This was # replaced earlier by the second transaction in the triple, i.e. # testTxs[^2][2]. FYI, the last transaction is testTxs[^1][1] as # it could not be replaced earlier by testTxs[^1][2]. item = xq.getItem(testTxs[^2][2].itemID).value nWasteBasket = xq.nItems.disposed # make sure the test makes sense, nonces were 0 ..< testTxs.len check (item.tx.nonce + 2).int == testTxs.len xq.disposeItems(item) check xq.nItems.total + 2 == testTxs.len check nWasteBasket + 2 == xq.nItems.disposed # -------------------------- block: var gap: Time nItems: int xq = bcCom.toTxPool(timeGap = gap, nGapItems = nItems, itList = txList, itemsPC = 35, # arbitrary delayMSecs = 100, # large enough to process noisy = noisy) # Set txs to pseudo random status. Note that this functon will cause # a violation of boundary conditions regarding nonces. So database # integrily check needs xq.txDB.verify() rather than xq.verify(). xq.setItemStatusFromInfo test &"Auto delete about {nItems} expired txs out of {xq.nItems.total}": # Make sure that the test did not collapse check 0 < nItems xq.lifeTime = getTime() - gap xq.flags = xq.flags + {autoZombifyPacked} # Evict and pick items from the wastbasket let disposedBase = xq.nItems.disposed evictedBase = evictionMeter.value impliedBase = impliedEvictionMeter.value # Zombify the items that are older than the artificial time gap. The # move to the waste basket takes place with the `xq.add()` directive # (which is empty as there are no new txs.) xq.add @[] let disposedItems = xq.nItems.disposed - disposedBase evictedItems = (evictionMeter.value - evictedBase).int impliedItems = (impliedEvictionMeter.value - impliedBase).int check xq.txDB.verify.isOk check disposedItems + disposedBase + xq.nItems.total == txList.len check 0 < evictedItems check evictedItems <= disposedItems check disposedItems == evictedItems + impliedItems # make sure that deletion was sort of expected let deleteExpextRatio = (evictedItems * 100 / nItems).int check deletedItemsRatioBandPC < deleteExpextRatio check deleteExpextRatio < (10000 div deletedItemsRatioBandPC) # -------------------- block: var xq = bcCom.toTxPool(txList, noisy = noisy) maxAddr: EthAddress nAddrItems = 0 nAddrPendingItems = 0 nAddrStagedItems = 0 nAddrPackedItems = 0 fromNumItems = nAddrPendingItems fromBucketInfo = "pending" fromBucket = txItemPending toBucketInfo = "staged" toBucket = txItemStaged # Set txs to pseudo random status xq.setItemStatusFromInfo # find address with max number of transactions for (address,nonceList) in xq.txDB.incAccount: if nAddrItems < nonceList.nItems: maxAddr = address nAddrItems = nonceList.nItems # count items nAddrPendingItems = xq.txDB.bySender.eq(maxAddr).eq(txItemPending).nItems nAddrStagedItems = xq.txDB.bySender.eq(maxAddr).eq(txItemStaged).nItems nAddrPackedItems = xq.txDB.bySender.eq(maxAddr).eq(txItemPacked).nItems # find the largest from-bucket if fromNumItems < nAddrStagedItems: fromNumItems = nAddrStagedItems fromBucketInfo = "staged" fromBucket = txItemStaged toBucketInfo = "packed" toBucket = txItemPacked if fromNumItems < nAddrPackedItems: fromNumItems = nAddrPackedItems fromBucketInfo = "packed" fromBucket = txItemPacked toBucketInfo = "pending" toBucket = txItemPending let moveNumItems = fromNumItems div 2 test &"Reassign {moveNumItems} of {fromNumItems} items "& &"from \"{fromBucketInfo}\" to \"{toBucketInfo}\"": # requite mimimum => there is a status queue with at least 2 entries check 3 < nAddrItems check nAddrPendingItems + nAddrStagedItems + nAddrPackedItems == nAddrItems check 0 < moveNumItems check 1 < fromNumItems var count = 0 let nonceList = xq.txDB.bySender.eq(maxAddr).eq(fromBucket).value.data block collect: for item in nonceList.incNonce: count.inc check xq.txDB.reassign(item, toBucket) if moveNumItems <= count: break collect check xq.txDB.verify.isOk case fromBucket of txItemPending: check nAddrPendingItems - moveNumItems == xq.txDB.bySender.eq(maxAddr).eq(txItemPending).nItems check nAddrStagedItems + moveNumItems == xq.txDB.bySender.eq(maxAddr).eq(txItemStaged).nItems check nAddrPackedItems == xq.txDB.bySender.eq(maxAddr).eq(txItemPacked).nItems of txItemStaged: check nAddrStagedItems - moveNumItems == xq.txDB.bySender.eq(maxAddr).eq(txItemStaged).nItems check nAddrPackedItems + moveNumItems == xq.txDB.bySender.eq(maxAddr).eq(txItemPacked).nItems check nAddrPendingItems == xq.txDB.bySender.eq(maxAddr).eq(txItemPending).nItems else: check nAddrPackedItems - moveNumItems == xq.txDB.bySender.eq(maxAddr).eq(txItemPacked).nItems check nAddrPendingItems + moveNumItems == xq.txDB.bySender.eq(maxAddr).eq(txItemPending).nItems check nAddrStagedItems == xq.txDB.bySender.eq(maxAddr).eq(txItemStaged).nItems # -------------------- let expect = ( xq.txDB.byStatus.eq(txItemPending).nItems, xq.txDB.byStatus.eq(txItemStaged).nItems, xq.txDB.byStatus.eq(txItemPacked).nItems) test &"Verify #items per bucket ({expect[0]},{expect[1]},{expect[2]})": let status = xq.nItems check expect == (status.pending,status.staged,status.packed) test "Recycling from waste basket": let basketPrefill = xq.nItems.disposed numDisposed = min(50,txList.len) # make sure to work on a copy of the pivot item (to see changes) thisItem = xq.getItem(txList[^numDisposed].itemID).value.dup # move to wastebasket xq.maxRejects = txList.len for n in 1 .. numDisposed: # use from top avoiding extra deletes (higer nonces per account) xq.disposeItems(txList[^n]) # make sure that the pivot item is in the waste basket check xq.getItem(thisItem.itemID).isErr check xq.txDB.byRejects.hasKey(thisItem.itemID) check basketPrefill + numDisposed == xq.nItems.disposed check txList.len == xq.nItems.total + xq.nItems.disposed # re-add item xq.add(thisItem.pooledTx) # verify that the pivot item was moved out from the waste basket check not xq.txDB.byRejects.hasKey(thisItem.itemID) check basketPrefill + numDisposed == xq.nItems.disposed + 1 check txList.len == xq.nItems.total + xq.nItems.disposed # verify that a new item was derived from the waste basket pivot item let wbItem = xq.getItem(thisItem.itemID).value check thisItem.info == wbItem.info check thisItem.timeStamp < wbItem.timeStamp proc runTxPackerTests(noisy = true) = suite "TxPool: Block packer tests": var ntBaseFee = 0.GasPrice ntNextFee = 0.GasPrice test "Calculate some non-trivial base fee": var feesList = SortedSet[GasPriceEx,bool].init() # provide a sorted list of gas fees for item in txList: discard feesList.insert(item.tx.effectiveGasTip(0.GasPrice)) let minKey = max(0, feesList.ge(GasPriceEx.low).value.key.int64) lowKey = feesList.gt(minKey.GasPriceEx).value.key.uint64 highKey = feesList.le(GasPriceEx.high).value.key.uint64 keyRange = highKey - lowKey keyStep = max(1u64, keyRange div 500_000) # what follows is a rather crude partitioning so that # * ntBaseFee partititions non-zero numbers of pending and staged txs # * ntNextFee decreases the number of staged txs ntBaseFee = (lowKey + keyStep).GasPrice # the following might throw an exception if the table is de-generated var nextKey = ntBaseFee for _ in [1, 2, 3]: let rcNextKey = feesList.gt(nextKey.GasPriceEx) check rcNextKey.isOk nextKey = rcNextKey.value.key.uint64.GasPrice ntNextFee = nextKey + keyStep.GasPrice # of course ... check ntBaseFee < ntNextFee block: var xq = bcCom.toTxPool(txList, ntBaseFee, noisy = noisy) xr = bcCom.toTxPool(txList, ntNextFee, noisy = noisy) block: let pending = xq.nItems.pending staged = xq.nItems.staged packed = xq.nItems.packed test &"Load txs with baseFee={ntBaseFee}, "& &"buckets={pending}/{staged}/{packed}": check 0 < pending check 0 < staged check xq.nItems.total == txList.len check xq.nItems.disposed == 0 block: let pending = xr.nItems.pending staged = xr.nItems.staged packed = xr.nItems.packed test &"Re-org txs previous buckets setting baseFee={ntNextFee}, "& &"buckets={pending}/{staged}/{packed}": check 0 < pending check 0 < staged check xr.nItems.total == txList.len check xr.nItems.disposed == 0 # having the same set of txs, setting the xq database to the same # base fee as the xr one, the bucket fills of both database must # be the same after re-org xq.baseFee = ntNextFee xq.triggerReorg # now, xq should look like xr check xq.verify.isOk check xq.nItems == xr.nItems block: # get some value below the middle let packPrice = ((minGasPrice + maxGasPrice).uint64 div 3).GasPrice lowerPrice = minGasPrice + 1.GasPrice test &"Packing txs, baseFee=0 minPrice={packPrice} "& &"targetBlockSize={xq.trgGasLimit}": # verify that the test does not degenerate check 0 < minGasPrice check minGasPrice < maxGasPrice # ignore base limit so that the `packPrice` below becomes effective xq.baseFee = 0.GasPrice check xq.nItems.disposed == 0 # set minimum target price xq.minPreLondonGasPrice = packPrice check xq.minPreLondonGasPrice == packPrice # employ packer # xq.jobCommit(forceMaintenance = true) check xq.packerVmExec.isOk check xq.verify.isOk # verify that the test did not degenerate check 0 < xq.gasTotals.packed check xq.nItems.disposed == 0 # assemble block from `packed` bucket let items = xq.toItems(txItemPacked) total = foldl(@[0.GasInt] & items.mapIt(it.tx.gasLimit), a+b) check xq.gasTotals.packed == total noisy.say "***", "1st bLock size=", total, " stats=", xq.nItems.pp test &"Clear and re-pack bucket": # prepare for POS transition in txpool xq.chain.com.pos.timestamp = EthTime.now() let items0 = xq.toItems(txItemPacked) saveState0 = foldl(@[0.GasInt] & items0.mapIt(it.tx.gasLimit), a+b) check 0 < xq.nItems.packed # re-pack bucket #xq.jobCommit(forceMaintenance = true) check xq.packerVmExec.isOk check xq.verify.isOk let items1 = xq.toItems(txItemPacked) saveState1 = foldl(@[0.GasInt] & items1.mapIt(it.tx.gasLimit), a+b) check items0 == items1 check saveState0 == saveState1 test &"Delete item and re-pack bucket/w lower minPrice={lowerPrice}": # verify that the test does not degenerate check 0 < lowerPrice check lowerPrice < packPrice check 0 < xq.nItems.packed let saveStats = xq.nItems lastItem = xq.toItems(txItemPacked)[^1] # delete last item from packed bucket xq.disposeItems(lastItem) check xq.verify.isOk # set new minimum target price xq.minPreLondonGasPrice = lowerPrice check xq.minPreLondonGasPrice == lowerPrice # re-pack bucket, packer needs extra trigger because there is # not necessarily a buckets re-org resulting in a change #xq.jobCommit(forceMaintenance = true) check xq.packerVmExec.isOk check xq.verify.isOk let items = xq.toItems(txItemPacked) newTotal = foldl(@[0.GasInt] & items.mapIt(it.tx.gasLimit), a+b) newStats = xq.nItems newItem = xq.toItems(txItemPacked)[^1] # for sanity assert the obvoius check 0 < xq.gasTotals.packed check xq.gasTotals.packed == newTotal # verify incremental packing check lastItem.info != newItem.info check saveStats.packed >= newStats.packed noisy.say "***", "2st bLock size=", newTotal, " stats=", newStats.pp # ------------------------------------------------- # After we wired ForkedChainRef with TxPool, we can # try to enable these test #[block: var xq = bcCom.toTxPool(txList, ntBaseFee, local = localAccounts, noisy = noisy) test "Assemble few blocks so we can backtrack": let w = xq.chain.com.db.getCanonicalHead let c = bcCom.newChain(extraValidation = false) var count = 0 while true: let r = xq.assembleBlock() if r.isErr: break let blk = r.get.blk check c.persistBlocks([blk]).isOk check xq.smartHead(blk.header) inc count if count >= 2: break # make sure we generate some block check count > 0 let (nMinTxs, nTrgTxs) = (15, 15) (nMinAccounts, nTrgAccounts) = (1, 8) canonicalHead = xq.chain.com.db.getCanonicalHead test &"Back track block chain head (at least "& &"{nMinTxs} txs, {nMinAccounts} known accounts)": # get the environment of a state back in the block chain, preferably # at least `nTrgTxs` txs and `nTrgAccounts` known accounts let (backHeader,backTxs,accLst) = xq.getBackHeader(nTrgTxs,nTrgAccounts) nBackBlocks = xq.head.number - backHeader.number stats = xq.nItems # verify that the test would not degenerate check nMinAccounts <= accLst.len check nMinTxs <= backTxs.len noisy.say "***", &"back tracked block chain:" & &" {backTxs.len} txs, {nBackBlocks} blocks," & &" {accLst.len} known accounts" check xq.smartHead(backHeader) # move insertion point # make sure that all txs have been added to the pool check stats.disposed == 0 check stats.total + backTxs.len == xq.nItems.total test &"Run packer, profitability will not increase with block size": xq.flags = xq.flags - {packItemsMaxGasLimit} check xq.packerVmExec.isOk let smallerBlockProfitability = xq.profitability smallerBlockSize = xq.gasCumulative noisy.say "***", "trg-packing", " profitability=", xq.profitability, " used=", xq.gasCumulative, " trg=", xq.trgGasLimit, " slack=", xq.trgGasLimit - xq.gasCumulative xq.flags = xq.flags + {packItemsMaxGasLimit} check xq.packerVmExec.isOk noisy.say "***", "max-packing", " profitability=", xq.profitability, " used=", xq.gasCumulative, " max=", xq.maxGasLimit, " slack=", xq.maxGasLimit - xq.gasCumulative check smallerBlockSize <= xq.gasCumulative check 0 < xq.profitability # Well, this ratio should be above 100 but might be slightly less # with small data samples (pathological case.) let blockProfitRatio = (((smallerBlockProfitability.uint64 * 1000) div (max(1u64,xq.profitability.uint64))) + 5) div 10 check decreasingBlockProfitRatioPC <= blockProfitRatio noisy.say "***", "cmp", " increase=", xq.gasCumulative - smallerBlockSize, " trg/max=", blockProfitRatio, "%" # if true: return test "Store generated block in block chain database": noisy.say "***", "locality", " locals=", xq.accountRanks.local.len, " remotes=", xq.accountRanks.remote.len # Force maximal block size. Accidentally, the latest tx should have # a `gasLimit` exceeding the available space on the block `gasLimit` # which will be checked below. xq.flags = xq.flags #+ {packItemsMaxGasLimit} # Invoke packer let r = xq.assembleBlock() if r.isErr: debugEcho r.error check false return let blk = r.get.blk # Make sure that there are at least two txs on the packed block so # this test does not degenerate. check 1 < xq.chain.receipts.len var overlap = -1 for n in countDown(blk.txs.len - 1, 0): let total = xq.chain.receipts[n].cumulativeGasUsed if blk.header.gasUsed < total + blk.txs[n].gasLimit: overlap = n break noisy.say "***", "overlap=#", overlap, " tx=#", blk.txs.len, " gasUsed=", blk.header.gasUsed, " gasLimit=", blk.header.gasLimit if 0 <= overlap: let n = overlap mostlySize = xq.chain.receipts[n].cumulativeGasUsed noisy.say "***", "overlap", " size=", mostlySize + blk.txs[n].gasLimit - blk.header.gasUsed let bdy = BlockBody(transactions: blk.txs, withdrawals: blk.withdrawals) hdr = block: var rc = blk.header rc.gasLimit = blk.header.gasLimit rc.testKeySign # Make certain that some tx was set up so that its gasLimit overlaps # with the total block size. Of course, running it in the VM will burn # much less than permitted so this block will be accepted. check 0 < overlap setTraceLevel() # Test low-level function for adding the new block to the database #xq.chain.maxMode = (packItemsMaxGasLimit in xq.flags) xq.chain.clearAccounts check xq.chain.vmState.processBlock(EthBlock.init(hdr, bdy)).isOk setErrorLevel() # Re-allocate using VM environment from `persistBlocks()` let res = BaseVMState.new(hdr, bcCom) check res.isOk let vmState2 = res.get check vmState2.processBlock(EthBlock.init(hdr, bdy)).isOk # This should not have changed check canonicalHead == xq.chain.com.db.getCanonicalHead # Using the high-level library function, re-append the block while # turning off header verification. let c = bcCom.newChain(extraValidation = false) check c.persistBlocks([EthBlock.init(hdr, bdy)]).isOk if bcCom.consensus == ConsensusType.POS: # PoS consensus will force the new blockheader as head # even though the difficulty or the blocknumber is lower than # previous canonical head check hdr.blockHash == xq.chain.com.db.getCanonicalHead.blockHash # Is the withdrawals persisted and loaded properly? var blockBody: BlockBody check xq.chain.com.db.getBlockBody(hdr, blockBody) check bdy == blockBody else: # The canonical head will be set to hdr if it scores high enough # (see implementation of db_chain.persistHeader()). let canonScore = xq.chain.com.db.getScore(canonicalHead.blockHash) headerScore = xq.chain.com.db.getScore(hdr.blockHash) check canonScore.isSome check headerScore.isSome if canonScore.get < headerScore.get: # Note that the updated canonical head is equivalent to hdr but not # necessarily binary equal. check hdr.blockHash == xq.chain.com.db.getCanonicalHead.blockHash else: check canonicalHead == xq.chain.com.db.getCanonicalHead]# # ------------------------------------------------------------------------------ # Main function(s) # ------------------------------------------------------------------------------ proc txPoolMain*() = runTxLoader() runTxPoolTests() runTxPackerTests() when isMainModule: txPoolMain() # ------------------------------------------------------------------------------ # End # ------------------------------------------------------------------------------