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406 lines
14 KiB
406 lines
14 KiB
// Copyright 2015 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package core
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import (
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"math/big"
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"time"
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lru "github.com/hashicorp/golang-lru"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/crypto"
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"github.com/ethereum/go-ethereum/rlp"
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"github.com/harmony-one/harmony/block"
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consensus_engine "github.com/harmony-one/harmony/consensus/engine"
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"github.com/harmony-one/harmony/consensus/reward"
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"github.com/harmony-one/harmony/core/state"
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"github.com/harmony-one/harmony/core/types"
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"github.com/harmony-one/harmony/core/vm"
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"github.com/harmony-one/harmony/internal/params"
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"github.com/harmony-one/harmony/internal/utils"
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"github.com/harmony-one/harmony/shard"
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"github.com/harmony-one/harmony/staking/slash"
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staking "github.com/harmony-one/harmony/staking/types"
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"github.com/pkg/errors"
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)
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const (
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resultCacheLimit = 64 // The number of cached results from processing blocks
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)
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// StateProcessor is a basic Processor, which takes care of transitioning
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// state from one point to another.
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//
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// StateProcessor implements Processor.
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type StateProcessor struct {
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config *params.ChainConfig // Chain configuration options
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bc *BlockChain // Canonical block chain
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engine consensus_engine.Engine // Consensus engine used for block rewards
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resultCache *lru.Cache // Cache for result after a certain block is processed
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}
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// this structure is cached, and each individual element is returned
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type ProcessorResult struct {
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Receipts types.Receipts
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CxReceipts types.CXReceipts
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StakeMsgs []staking.StakeMsg
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Logs []*types.Log
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UsedGas uint64
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Reward reward.Reader
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State *state.DB
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}
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// NewStateProcessor initialises a new StateProcessor.
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func NewStateProcessor(
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config *params.ChainConfig, bc *BlockChain, engine consensus_engine.Engine,
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) *StateProcessor {
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resultCache, _ := lru.New(resultCacheLimit)
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return &StateProcessor{
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config: config,
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bc: bc,
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engine: engine,
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resultCache: resultCache,
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}
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}
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// Process processes the state changes according to the Ethereum rules by running
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// the transaction messages using the statedb and applying any rewards to both
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// the processor (coinbase) and any included uncles.
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//
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// Process returns the receipts and logs accumulated during the process and
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// returns the amount of gas that was used in the process. If any of the
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// transactions failed to execute due to insufficient gas it will return an error.
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func (p *StateProcessor) Process(
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block *types.Block, statedb *state.DB, cfg vm.Config, readCache bool,
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) (
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types.Receipts, types.CXReceipts, []staking.StakeMsg,
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[]*types.Log, uint64, reward.Reader, *state.DB, error,
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) {
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cacheKey := block.Hash()
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if readCache {
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if cached, ok := p.resultCache.Get(cacheKey); ok {
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// Return the cached result to avoid process the same block again.
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// Only the successful results are cached in case for retry.
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result := cached.(*ProcessorResult)
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utils.Logger().Info().Str("block num", block.Number().String()).Msg("result cache hit.")
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return result.Receipts, result.CxReceipts, result.StakeMsgs, result.Logs, result.UsedGas, result.Reward, result.State, nil
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}
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}
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var (
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receipts types.Receipts
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outcxs types.CXReceipts
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incxs = block.IncomingReceipts()
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usedGas = new(uint64)
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header = block.Header()
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allLogs []*types.Log
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gp = new(GasPool).AddGas(block.GasLimit())
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blockStakeMsgs []staking.StakeMsg = make([]staking.StakeMsg, 0)
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)
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beneficiary, err := p.bc.GetECDSAFromCoinbase(header)
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if err != nil {
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return nil, nil, nil, nil, 0, nil, statedb, err
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}
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startTime := time.Now()
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// Iterate over and process the individual transactions
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for i, tx := range block.Transactions() {
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statedb.Prepare(tx.Hash(), block.Hash(), i)
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receipt, cxReceipt, stakeMsgs, _, err := ApplyTransaction(
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p.config, p.bc, &beneficiary, gp, statedb, header, tx, usedGas, cfg,
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)
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if err != nil {
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return nil, nil, nil, nil, 0, nil, statedb, err
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}
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receipts = append(receipts, receipt)
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if cxReceipt != nil {
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outcxs = append(outcxs, cxReceipt)
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}
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if len(stakeMsgs) > 0 {
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blockStakeMsgs = append(blockStakeMsgs, stakeMsgs...)
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}
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allLogs = append(allLogs, receipt.Logs...)
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}
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utils.Logger().Debug().Int64("elapsed time", time.Now().Sub(startTime).Milliseconds()).Msg("Process Normal Txns")
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startTime = time.Now()
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// Iterate over and process the staking transactions
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L := len(block.Transactions())
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for i, tx := range block.StakingTransactions() {
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statedb.Prepare(tx.Hash(), block.Hash(), i+L)
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receipt, _, err := ApplyStakingTransaction(
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p.config, p.bc, &beneficiary, gp, statedb, header, tx, usedGas, cfg,
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)
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if err != nil {
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return nil, nil, nil, nil, 0, nil, statedb, err
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}
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receipts = append(receipts, receipt)
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allLogs = append(allLogs, receipt.Logs...)
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}
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utils.Logger().Debug().Int64("elapsed time", time.Now().Sub(startTime).Milliseconds()).Msg("Process Staking Txns")
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// incomingReceipts should always be processed
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// after transactions (to be consistent with the block proposal)
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for _, cx := range block.IncomingReceipts() {
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if err := ApplyIncomingReceipt(
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p.config, statedb, header, cx,
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); err != nil {
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return nil, nil,
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nil, nil, 0, nil, statedb, errors.New("[Process] Cannot apply incoming receipts")
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}
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}
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slashes := slash.Records{}
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if s := header.Slashes(); len(s) > 0 {
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if err := rlp.DecodeBytes(s, &slashes); err != nil {
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return nil, nil, nil, nil, 0, nil, statedb, errors.New(
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"[Process] Cannot finalize block",
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)
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}
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}
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// Finalize the block, applying any consensus engine specific extras (e.g. block rewards)
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sigsReady := make(chan bool)
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go func() {
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// Block processing don't need to block on reward computation as in block proposal
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sigsReady <- true
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}()
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_, payout, err := p.engine.Finalize(
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p.bc, header, statedb, block.Transactions(),
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receipts, outcxs, incxs, block.StakingTransactions(), slashes, sigsReady, func() uint64 { return header.ViewID().Uint64() },
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)
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if err != nil {
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return nil, nil, nil, nil, 0, nil, statedb, errors.New("[Process] Cannot finalize block")
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}
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result := &ProcessorResult{
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Receipts: receipts,
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CxReceipts: outcxs,
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StakeMsgs: blockStakeMsgs,
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Logs: allLogs,
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UsedGas: *usedGas,
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Reward: payout,
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State: statedb,
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}
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p.resultCache.Add(cacheKey, result)
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return receipts, outcxs, blockStakeMsgs, allLogs, *usedGas, payout, statedb, nil
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}
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// CacheProcessorResult caches the process result on the cache key.
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func (p *StateProcessor) CacheProcessorResult(cacheKey interface{}, result *ProcessorResult) {
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p.resultCache.Add(cacheKey, result)
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}
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// return true if it is valid
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func getTransactionType(
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config *params.ChainConfig, header *block.Header, tx *types.Transaction,
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) types.TransactionType {
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if header.ShardID() == tx.ShardID() &&
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(!config.AcceptsCrossTx(header.Epoch()) ||
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tx.ShardID() == tx.ToShardID()) {
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return types.SameShardTx
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}
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numShards := shard.Schedule.InstanceForEpoch(header.Epoch()).NumShards()
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// Assuming here all the shards are consecutive from 0 to n-1, n is total number of shards
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if tx.ShardID() != tx.ToShardID() &&
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header.ShardID() == tx.ShardID() &&
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tx.ToShardID() < numShards {
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return types.SubtractionOnly
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}
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return types.InvalidTx
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}
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// ApplyTransaction attempts to apply a transaction to the given state database
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// and uses the input parameters for its environment. It returns the receipt
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// for the transaction, gas used and an error if the transaction failed,
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// indicating the block was invalid.
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func ApplyTransaction(config *params.ChainConfig, bc ChainContext, author *common.Address, gp *GasPool, statedb *state.DB, header *block.Header, tx *types.Transaction, usedGas *uint64, cfg vm.Config) (*types.Receipt, *types.CXReceipt, []staking.StakeMsg, uint64, error) {
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txType := getTransactionType(config, header, tx)
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if txType == types.InvalidTx {
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return nil, nil, nil, 0, errors.New("Invalid Transaction Type")
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}
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if txType != types.SameShardTx && !config.AcceptsCrossTx(header.Epoch()) {
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return nil, nil, nil, 0, errors.Errorf(
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"cannot handle cross-shard transaction until after epoch %v (now %v)",
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config.CrossTxEpoch, header.Epoch(),
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)
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}
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var signer types.Signer
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if tx.IsEthCompatible() {
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if !config.IsEthCompatible(header.Epoch()) {
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return nil, nil, nil, 0, errors.New("ethereum compatible transactions not supported at current epoch")
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}
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signer = types.NewEIP155Signer(config.EthCompatibleChainID)
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} else {
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signer = types.MakeSigner(config, header.Epoch())
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}
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msg, err := tx.AsMessage(signer)
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// skip signer err for additiononly tx
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if err != nil {
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return nil, nil, nil, 0, err
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}
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// Create a new context to be used in the EVM environment
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context := NewEVMContext(msg, header, bc, author)
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context.TxType = txType
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// Create a new environment which holds all relevant information
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// about the transaction and calling mechanisms.
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vmenv := vm.NewEVM(context, statedb, config, cfg)
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// Apply the transaction to the current state (included in the env)
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result, err := ApplyMessage(vmenv, msg, gp)
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if err != nil {
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return nil, nil, nil, 0, err
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}
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// Update the state with pending changes
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var root []byte
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if config.IsS3(header.Epoch()) {
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statedb.Finalise(true)
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} else {
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root = statedb.IntermediateRoot(config.IsS3(header.Epoch())).Bytes()
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}
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*usedGas += result.UsedGas
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failedExe := result.VMErr != nil
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// Create a new receipt for the transaction, storing the intermediate root and gas used by the tx
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// based on the eip phase, we're passing whether the root touch-delete accounts.
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receipt := types.NewReceipt(root, failedExe, *usedGas)
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receipt.TxHash = tx.Hash()
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receipt.GasUsed = result.UsedGas
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// if the transaction created a contract, store the creation address in the receipt.
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if msg.To() == nil {
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receipt.ContractAddress = crypto.CreateAddress(vmenv.Context.Origin, tx.Nonce())
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}
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// Set the receipt logs and create a bloom for filtering
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if config.IsReceiptLog(header.Epoch()) {
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receipt.Logs = statedb.GetLogs(tx.Hash())
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}
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receipt.Bloom = types.CreateBloom(types.Receipts{receipt})
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var cxReceipt *types.CXReceipt
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// Do not create cxReceipt if EVM call failed
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if txType == types.SubtractionOnly && !failedExe {
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cxReceipt = &types.CXReceipt{TxHash: tx.Hash(), From: msg.From(), To: msg.To(), ShardID: tx.ShardID(), ToShardID: tx.ToShardID(), Amount: msg.Value()}
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} else {
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cxReceipt = nil
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}
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return receipt, cxReceipt, vmenv.StakeMsgs, result.UsedGas, err
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}
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// ApplyStakingTransaction attempts to apply a staking transaction to the given state database
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// and uses the input parameters for its environment. It returns the receipt
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// for the staking transaction, gas used and an error if the transaction failed,
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// indicating the block was invalid.
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// staking transaction will use the code field in the account to store the staking information
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func ApplyStakingTransaction(
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config *params.ChainConfig, bc ChainContext, author *common.Address, gp *GasPool, statedb *state.DB,
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header *block.Header, tx *staking.StakingTransaction, usedGas *uint64, cfg vm.Config) (receipt *types.Receipt, gas uint64, err error) {
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msg, err := StakingToMessage(tx, header.Number())
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if err != nil {
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return nil, 0, err
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}
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// Create a new context to be used in the EVM environment
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context := NewEVMContext(msg, header, bc, author)
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// Create a new environment which holds all relevant information
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// about the transaction and calling mechanisms.
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vmenv := vm.NewEVM(context, statedb, config, cfg)
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// Apply the transaction to the current state (included in the env)
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gas, err = ApplyStakingMessage(vmenv, msg, gp, bc)
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if err != nil {
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return nil, 0, err
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}
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// Update the state with pending changes
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var root []byte
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if config.IsS3(header.Epoch()) {
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statedb.Finalise(true)
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} else {
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root = statedb.IntermediateRoot(config.IsS3(header.Epoch())).Bytes()
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}
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*usedGas += gas
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receipt = types.NewReceipt(root, false, *usedGas)
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receipt.TxHash = tx.Hash()
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receipt.GasUsed = gas
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if config.IsReceiptLog(header.Epoch()) {
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receipt.Logs = statedb.GetLogs(tx.Hash())
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utils.Logger().Info().Interface("CollectReward", receipt.Logs)
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}
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return receipt, gas, nil
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}
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// ApplyIncomingReceipt will add amount into ToAddress in the receipt
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func ApplyIncomingReceipt(
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config *params.ChainConfig, db *state.DB,
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header *block.Header, cxp *types.CXReceiptsProof,
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) error {
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if cxp == nil {
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return nil
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}
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for _, cx := range cxp.Receipts {
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if cx == nil || cx.To == nil { // should not happend
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return errors.Errorf(
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"ApplyIncomingReceipts: Invalid incomingReceipt! %v", cx,
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)
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}
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utils.Logger().Info().Interface("receipt", cx).
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Msgf("ApplyIncomingReceipts: ADDING BALANCE %d", cx.Amount)
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if !db.Exist(*cx.To) {
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db.CreateAccount(*cx.To)
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}
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db.AddBalance(*cx.To, cx.Amount)
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db.IntermediateRoot(config.IsS3(header.Epoch()))
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}
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return nil
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}
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// StakingToMessage returns the staking transaction as a core.Message.
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// requires a signer to derive the sender.
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// put it here to avoid cyclic import
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func StakingToMessage(
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tx *staking.StakingTransaction, blockNum *big.Int,
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) (types.Message, error) {
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payload, err := tx.RLPEncodeStakeMsg()
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if err != nil {
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return types.Message{}, err
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}
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from, err := tx.SenderAddress()
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if err != nil {
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return types.Message{}, err
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}
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msg := types.NewStakingMessage(from, tx.Nonce(), tx.GasLimit(), tx.GasPrice(), payload, blockNum)
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stkType := tx.StakingType()
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if _, ok := types.StakingTypeMap[stkType]; !ok {
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return types.Message{}, staking.ErrInvalidStakingKind
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}
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msg.SetType(types.StakingTypeMap[stkType])
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return msg, nil
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}
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