forked from cerc-io/plugeth
ethclient/simulated: implement new sim backend (#28202)
This is a rewrite of the 'simulated backend', an implementation of the ethclient interfaces which is backed by a simulated blockchain. It was getting annoying to maintain the old version of the simulated backend feature because there was a lot of code duplication with the main client. The new version is built using parts that we already have: an in-memory geth node instance running in developer mode provides the chain, while the Go API is provided by ethclient. A backwards-compatibility wrapper is provided, but the simulated backend has also moved to a more sensible import path: github.com/ethereum/go-ethereum/ethclient/simulated --------- Co-authored-by: Felix Lange <fjl@twurst.com> Co-authored-by: Gary Rong <garyrong0905@gmail.com>
This commit is contained in:
Marius van der Wijden
GitHub
parent
9e018ce3a5
commit
2d08c99009
@ -84,6 +84,11 @@ type BlockHashContractCaller interface {
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// used when the user does not provide some needed values, but rather leaves it up
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// to the transactor to decide.
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type ContractTransactor interface {
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ethereum.GasEstimator
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ethereum.GasPricer
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ethereum.GasPricer1559
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ethereum.TransactionSender
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// HeaderByNumber returns a block header from the current canonical chain. If
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// number is nil, the latest known header is returned.
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HeaderByNumber(ctx context.Context, number *big.Int) (*types.Header, error)
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@ -93,38 +98,6 @@ type ContractTransactor interface {
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// PendingNonceAt retrieves the current pending nonce associated with an account.
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PendingNonceAt(ctx context.Context, account common.Address) (uint64, error)
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// SuggestGasPrice retrieves the currently suggested gas price to allow a timely
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// execution of a transaction.
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SuggestGasPrice(ctx context.Context) (*big.Int, error)
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// SuggestGasTipCap retrieves the currently suggested 1559 priority fee to allow
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// a timely execution of a transaction.
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SuggestGasTipCap(ctx context.Context) (*big.Int, error)
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// EstimateGas tries to estimate the gas needed to execute a specific
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// transaction based on the current pending state of the backend blockchain.
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// There is no guarantee that this is the true gas limit requirement as other
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// transactions may be added or removed by miners, but it should provide a basis
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// for setting a reasonable default.
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EstimateGas(ctx context.Context, call ethereum.CallMsg) (gas uint64, err error)
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// SendTransaction injects the transaction into the pending pool for execution.
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SendTransaction(ctx context.Context, tx *types.Transaction) error
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}
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// ContractFilterer defines the methods needed to access log events using one-off
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// queries or continuous event subscriptions.
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type ContractFilterer interface {
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// FilterLogs executes a log filter operation, blocking during execution and
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// returning all the results in one batch.
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//
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// TODO(karalabe): Deprecate when the subscription one can return past data too.
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FilterLogs(ctx context.Context, query ethereum.FilterQuery) ([]types.Log, error)
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// SubscribeFilterLogs creates a background log filtering operation, returning
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// a subscription immediately, which can be used to stream the found events.
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SubscribeFilterLogs(ctx context.Context, query ethereum.FilterQuery, ch chan<- types.Log) (ethereum.Subscription, error)
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}
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// DeployBackend wraps the operations needed by WaitMined and WaitDeployed.
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@ -133,6 +106,12 @@ type DeployBackend interface {
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CodeAt(ctx context.Context, account common.Address, blockNumber *big.Int) ([]byte, error)
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}
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// ContractFilterer defines the methods needed to access log events using one-off
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// queries or continuous event subscriptions.
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type ContractFilterer interface {
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ethereum.LogFilterer
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}
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// ContractBackend defines the methods needed to work with contracts on a read-write basis.
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type ContractBackend interface {
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ContractCaller
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@ -18,958 +18,35 @@ package backends
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import (
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"context"
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"errors"
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"fmt"
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"math/big"
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"sync"
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"time"
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"github.com/ethereum/go-ethereum"
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"github.com/ethereum/go-ethereum/accounts/abi"
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"github.com/ethereum/go-ethereum/accounts/abi/bind"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/common/hexutil"
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"github.com/ethereum/go-ethereum/common/math"
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"github.com/ethereum/go-ethereum/consensus/ethash"
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"github.com/ethereum/go-ethereum/core"
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"github.com/ethereum/go-ethereum/core/bloombits"
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"github.com/ethereum/go-ethereum/core/rawdb"
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"github.com/ethereum/go-ethereum/core/state"
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"github.com/ethereum/go-ethereum/core/types"
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"github.com/ethereum/go-ethereum/core/vm"
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"github.com/ethereum/go-ethereum/eth/filters"
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"github.com/ethereum/go-ethereum/ethdb"
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"github.com/ethereum/go-ethereum/event"
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"github.com/ethereum/go-ethereum/log"
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"github.com/ethereum/go-ethereum/params"
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"github.com/ethereum/go-ethereum/rpc"
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"github.com/ethereum/go-ethereum/ethclient/simulated"
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)
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// This nil assignment ensures at compile time that SimulatedBackend implements bind.ContractBackend.
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var _ bind.ContractBackend = (*SimulatedBackend)(nil)
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var (
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errBlockNumberUnsupported = errors.New("simulatedBackend cannot access blocks other than the latest block")
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errBlockHashUnsupported = errors.New("simulatedBackend cannot access blocks by hash other than the latest block")
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errBlockDoesNotExist = errors.New("block does not exist in blockchain")
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errTransactionDoesNotExist = errors.New("transaction does not exist")
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)
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// SimulatedBackend implements bind.ContractBackend, simulating a blockchain in
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// the background. Its main purpose is to allow for easy testing of contract bindings.
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// Simulated backend implements the following interfaces:
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// ChainReader, ChainStateReader, ContractBackend, ContractCaller, ContractFilterer, ContractTransactor,
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// DeployBackend, GasEstimator, GasPricer, LogFilterer, PendingContractCaller, TransactionReader, and TransactionSender
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// SimulatedBackend is a simulated blockchain.
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// Deprecated: use package github.com/ethereum/go-ethereum/ethclient/simulated instead.
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type SimulatedBackend struct {
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database ethdb.Database // In memory database to store our testing data
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blockchain *core.BlockChain // Ethereum blockchain to handle the consensus
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mu sync.Mutex
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pendingBlock *types.Block // Currently pending block that will be imported on request
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pendingState *state.StateDB // Currently pending state that will be the active on request
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pendingReceipts types.Receipts // Currently receipts for the pending block
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events *filters.EventSystem // for filtering log events live
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filterSystem *filters.FilterSystem // for filtering database logs
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config *params.ChainConfig
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*simulated.Backend
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simulated.Client
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}
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// NewSimulatedBackendWithDatabase creates a new binding backend based on the given database
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// and uses a simulated blockchain for testing purposes.
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// A simulated backend always uses chainID 1337.
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func NewSimulatedBackendWithDatabase(database ethdb.Database, alloc core.GenesisAlloc, gasLimit uint64) *SimulatedBackend {
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genesis := core.Genesis{
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Config: params.AllEthashProtocolChanges,
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GasLimit: gasLimit,
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Alloc: alloc,
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}
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blockchain, _ := core.NewBlockChain(database, nil, &genesis, nil, ethash.NewFaker(), vm.Config{}, nil, nil)
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backend := &SimulatedBackend{
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database: database,
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blockchain: blockchain,
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config: genesis.Config,
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}
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filterBackend := &filterBackend{database, blockchain, backend}
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backend.filterSystem = filters.NewFilterSystem(filterBackend, filters.Config{})
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backend.events = filters.NewEventSystem(backend.filterSystem, false)
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header := backend.blockchain.CurrentBlock()
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block := backend.blockchain.GetBlock(header.Hash(), header.Number.Uint64())
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backend.rollback(block)
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return backend
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// Fork sets the head to a new block, which is based on the provided parentHash.
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func (b *SimulatedBackend) Fork(ctx context.Context, parentHash common.Hash) error {
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return b.Backend.Fork(parentHash)
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}
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// NewSimulatedBackend creates a new binding backend using a simulated blockchain
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// for testing purposes.
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//
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// A simulated backend always uses chainID 1337.
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//
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// Deprecated: please use simulated.Backend from package
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// github.com/ethereum/go-ethereum/ethclient/simulated instead.
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func NewSimulatedBackend(alloc core.GenesisAlloc, gasLimit uint64) *SimulatedBackend {
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return NewSimulatedBackendWithDatabase(rawdb.NewMemoryDatabase(), alloc, gasLimit)
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}
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// Close terminates the underlying blockchain's update loop.
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func (b *SimulatedBackend) Close() error {
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b.blockchain.Stop()
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return nil
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}
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// Commit imports all the pending transactions as a single block and starts a
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// fresh new state.
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func (b *SimulatedBackend) Commit() common.Hash {
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b.mu.Lock()
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defer b.mu.Unlock()
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if _, err := b.blockchain.InsertChain([]*types.Block{b.pendingBlock}); err != nil {
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panic(err) // This cannot happen unless the simulator is wrong, fail in that case
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}
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blockHash := b.pendingBlock.Hash()
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// Using the last inserted block here makes it possible to build on a side
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// chain after a fork.
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b.rollback(b.pendingBlock)
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return blockHash
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}
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// Rollback aborts all pending transactions, reverting to the last committed state.
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func (b *SimulatedBackend) Rollback() {
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b.mu.Lock()
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defer b.mu.Unlock()
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header := b.blockchain.CurrentBlock()
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block := b.blockchain.GetBlock(header.Hash(), header.Number.Uint64())
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b.rollback(block)
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}
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func (b *SimulatedBackend) rollback(parent *types.Block) {
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blocks, _ := core.GenerateChain(b.config, parent, ethash.NewFaker(), b.database, 1, func(int, *core.BlockGen) {})
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b.pendingBlock = blocks[0]
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b.pendingState, _ = state.New(b.pendingBlock.Root(), b.blockchain.StateCache(), nil)
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}
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// Fork creates a side-chain that can be used to simulate reorgs.
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//
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// This function should be called with the ancestor block where the new side
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// chain should be started. Transactions (old and new) can then be applied on
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// top and Commit-ed.
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//
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// Note, the side-chain will only become canonical (and trigger the events) when
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// it becomes longer. Until then CallContract will still operate on the current
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// canonical chain.
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//
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// There is a % chance that the side chain becomes canonical at the same length
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// to simulate live network behavior.
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func (b *SimulatedBackend) Fork(ctx context.Context, parent common.Hash) error {
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b.mu.Lock()
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defer b.mu.Unlock()
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if len(b.pendingBlock.Transactions()) != 0 {
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return errors.New("pending block dirty")
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}
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block, err := b.blockByHash(ctx, parent)
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if err != nil {
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return err
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}
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b.rollback(block)
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return nil
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}
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// stateByBlockNumber retrieves a state by a given blocknumber.
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func (b *SimulatedBackend) stateByBlockNumber(ctx context.Context, blockNumber *big.Int) (*state.StateDB, error) {
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if blockNumber == nil || blockNumber.Cmp(b.blockchain.CurrentBlock().Number) == 0 {
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return b.blockchain.State()
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}
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block, err := b.blockByNumber(ctx, blockNumber)
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if err != nil {
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return nil, err
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}
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return b.blockchain.StateAt(block.Root())
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}
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// CodeAt returns the code associated with a certain account in the blockchain.
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func (b *SimulatedBackend) CodeAt(ctx context.Context, contract common.Address, blockNumber *big.Int) ([]byte, error) {
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b.mu.Lock()
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defer b.mu.Unlock()
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stateDB, err := b.stateByBlockNumber(ctx, blockNumber)
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if err != nil {
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return nil, err
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}
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return stateDB.GetCode(contract), nil
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}
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// CodeAtHash returns the code associated with a certain account in the blockchain.
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func (b *SimulatedBackend) CodeAtHash(ctx context.Context, contract common.Address, blockHash common.Hash) ([]byte, error) {
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b.mu.Lock()
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defer b.mu.Unlock()
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header, err := b.headerByHash(blockHash)
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if err != nil {
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return nil, err
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}
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stateDB, err := b.blockchain.StateAt(header.Root)
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if err != nil {
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return nil, err
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}
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return stateDB.GetCode(contract), nil
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}
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// BalanceAt returns the wei balance of a certain account in the blockchain.
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func (b *SimulatedBackend) BalanceAt(ctx context.Context, contract common.Address, blockNumber *big.Int) (*big.Int, error) {
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b.mu.Lock()
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defer b.mu.Unlock()
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stateDB, err := b.stateByBlockNumber(ctx, blockNumber)
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if err != nil {
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return nil, err
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}
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return stateDB.GetBalance(contract), nil
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}
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// NonceAt returns the nonce of a certain account in the blockchain.
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func (b *SimulatedBackend) NonceAt(ctx context.Context, contract common.Address, blockNumber *big.Int) (uint64, error) {
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b.mu.Lock()
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defer b.mu.Unlock()
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stateDB, err := b.stateByBlockNumber(ctx, blockNumber)
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if err != nil {
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return 0, err
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}
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return stateDB.GetNonce(contract), nil
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}
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// StorageAt returns the value of key in the storage of an account in the blockchain.
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func (b *SimulatedBackend) StorageAt(ctx context.Context, contract common.Address, key common.Hash, blockNumber *big.Int) ([]byte, error) {
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b.mu.Lock()
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defer b.mu.Unlock()
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stateDB, err := b.stateByBlockNumber(ctx, blockNumber)
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if err != nil {
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return nil, err
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}
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val := stateDB.GetState(contract, key)
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return val[:], nil
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}
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// TransactionReceipt returns the receipt of a transaction.
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func (b *SimulatedBackend) TransactionReceipt(ctx context.Context, txHash common.Hash) (*types.Receipt, error) {
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b.mu.Lock()
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defer b.mu.Unlock()
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receipt, _, _, _ := rawdb.ReadReceipt(b.database, txHash, b.config)
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if receipt == nil {
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return nil, ethereum.NotFound
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}
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return receipt, nil
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}
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// TransactionByHash checks the pool of pending transactions in addition to the
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// blockchain. The isPending return value indicates whether the transaction has been
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// mined yet. Note that the transaction may not be part of the canonical chain even if
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// it's not pending.
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func (b *SimulatedBackend) TransactionByHash(ctx context.Context, txHash common.Hash) (*types.Transaction, bool, error) {
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b.mu.Lock()
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defer b.mu.Unlock()
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tx := b.pendingBlock.Transaction(txHash)
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if tx != nil {
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return tx, true, nil
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}
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tx, _, _, _ = rawdb.ReadTransaction(b.database, txHash)
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if tx != nil {
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return tx, false, nil
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}
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return nil, false, ethereum.NotFound
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}
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// BlockByHash retrieves a block based on the block hash.
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func (b *SimulatedBackend) BlockByHash(ctx context.Context, hash common.Hash) (*types.Block, error) {
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b.mu.Lock()
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defer b.mu.Unlock()
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return b.blockByHash(ctx, hash)
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}
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// blockByHash retrieves a block based on the block hash without Locking.
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func (b *SimulatedBackend) blockByHash(ctx context.Context, hash common.Hash) (*types.Block, error) {
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if hash == b.pendingBlock.Hash() {
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return b.pendingBlock, nil
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}
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block := b.blockchain.GetBlockByHash(hash)
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if block != nil {
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return block, nil
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}
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return nil, errBlockDoesNotExist
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}
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// BlockByNumber retrieves a block from the database by number, caching it
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// (associated with its hash) if found.
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func (b *SimulatedBackend) BlockByNumber(ctx context.Context, number *big.Int) (*types.Block, error) {
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b.mu.Lock()
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defer b.mu.Unlock()
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return b.blockByNumber(ctx, number)
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}
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// blockByNumber retrieves a block from the database by number, caching it
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// (associated with its hash) if found without Lock.
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func (b *SimulatedBackend) blockByNumber(ctx context.Context, number *big.Int) (*types.Block, error) {
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if number == nil || number.Cmp(b.pendingBlock.Number()) == 0 {
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return b.blockByHash(ctx, b.blockchain.CurrentBlock().Hash())
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}
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block := b.blockchain.GetBlockByNumber(uint64(number.Int64()))
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if block == nil {
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return nil, errBlockDoesNotExist
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}
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return block, nil
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}
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// HeaderByHash returns a block header from the current canonical chain.
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func (b *SimulatedBackend) HeaderByHash(ctx context.Context, hash common.Hash) (*types.Header, error) {
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b.mu.Lock()
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defer b.mu.Unlock()
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return b.headerByHash(hash)
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}
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// headerByHash retrieves a header from the database by hash without Lock.
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func (b *SimulatedBackend) headerByHash(hash common.Hash) (*types.Header, error) {
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if hash == b.pendingBlock.Hash() {
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return b.pendingBlock.Header(), nil
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}
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header := b.blockchain.GetHeaderByHash(hash)
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if header == nil {
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return nil, errBlockDoesNotExist
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}
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return header, nil
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}
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// HeaderByNumber returns a block header from the current canonical chain. If number is
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// nil, the latest known header is returned.
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func (b *SimulatedBackend) HeaderByNumber(ctx context.Context, block *big.Int) (*types.Header, error) {
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b.mu.Lock()
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defer b.mu.Unlock()
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if block == nil || block.Cmp(b.pendingBlock.Number()) == 0 {
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return b.blockchain.CurrentHeader(), nil
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}
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return b.blockchain.GetHeaderByNumber(uint64(block.Int64())), nil
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}
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// TransactionCount returns the number of transactions in a given block.
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func (b *SimulatedBackend) TransactionCount(ctx context.Context, blockHash common.Hash) (uint, error) {
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b.mu.Lock()
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defer b.mu.Unlock()
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|
||||
if blockHash == b.pendingBlock.Hash() {
|
||||
return uint(b.pendingBlock.Transactions().Len()), nil
|
||||
}
|
||||
|
||||
block := b.blockchain.GetBlockByHash(blockHash)
|
||||
if block == nil {
|
||||
return uint(0), errBlockDoesNotExist
|
||||
}
|
||||
|
||||
return uint(block.Transactions().Len()), nil
|
||||
}
|
||||
|
||||
// TransactionInBlock returns the transaction for a specific block at a specific index.
|
||||
func (b *SimulatedBackend) TransactionInBlock(ctx context.Context, blockHash common.Hash, index uint) (*types.Transaction, error) {
|
||||
b.mu.Lock()
|
||||
defer b.mu.Unlock()
|
||||
|
||||
if blockHash == b.pendingBlock.Hash() {
|
||||
transactions := b.pendingBlock.Transactions()
|
||||
if uint(len(transactions)) < index+1 {
|
||||
return nil, errTransactionDoesNotExist
|
||||
}
|
||||
|
||||
return transactions[index], nil
|
||||
}
|
||||
|
||||
block := b.blockchain.GetBlockByHash(blockHash)
|
||||
if block == nil {
|
||||
return nil, errBlockDoesNotExist
|
||||
}
|
||||
|
||||
transactions := block.Transactions()
|
||||
if uint(len(transactions)) < index+1 {
|
||||
return nil, errTransactionDoesNotExist
|
||||
}
|
||||
|
||||
return transactions[index], nil
|
||||
}
|
||||
|
||||
// PendingCodeAt returns the code associated with an account in the pending state.
|
||||
func (b *SimulatedBackend) PendingCodeAt(ctx context.Context, contract common.Address) ([]byte, error) {
|
||||
b.mu.Lock()
|
||||
defer b.mu.Unlock()
|
||||
|
||||
return b.pendingState.GetCode(contract), nil
|
||||
}
|
||||
|
||||
func newRevertError(result *core.ExecutionResult) *revertError {
|
||||
reason, errUnpack := abi.UnpackRevert(result.Revert())
|
||||
err := errors.New("execution reverted")
|
||||
if errUnpack == nil {
|
||||
err = fmt.Errorf("execution reverted: %v", reason)
|
||||
}
|
||||
return &revertError{
|
||||
error: err,
|
||||
reason: hexutil.Encode(result.Revert()),
|
||||
b := simulated.New(alloc, gasLimit)
|
||||
return &SimulatedBackend{
|
||||
Backend: b,
|
||||
Client: b.Client(),
|
||||
}
|
||||
}
|
||||
|
||||
// revertError is an API error that encompasses an EVM revert with JSON error
|
||||
// code and a binary data blob.
|
||||
type revertError struct {
|
||||
error
|
||||
reason string // revert reason hex encoded
|
||||
}
|
||||
|
||||
// ErrorCode returns the JSON error code for a revert.
|
||||
// See: https://github.com/ethereum/wiki/wiki/JSON-RPC-Error-Codes-Improvement-Proposal
|
||||
func (e *revertError) ErrorCode() int {
|
||||
return 3
|
||||
}
|
||||
|
||||
// ErrorData returns the hex encoded revert reason.
|
||||
func (e *revertError) ErrorData() interface{} {
|
||||
return e.reason
|
||||
}
|
||||
|
||||
// CallContract executes a contract call.
|
||||
func (b *SimulatedBackend) CallContract(ctx context.Context, call ethereum.CallMsg, blockNumber *big.Int) ([]byte, error) {
|
||||
b.mu.Lock()
|
||||
defer b.mu.Unlock()
|
||||
|
||||
if blockNumber != nil && blockNumber.Cmp(b.blockchain.CurrentBlock().Number) != 0 {
|
||||
return nil, errBlockNumberUnsupported
|
||||
}
|
||||
return b.callContractAtHead(ctx, call)
|
||||
}
|
||||
|
||||
// CallContractAtHash executes a contract call on a specific block hash.
|
||||
func (b *SimulatedBackend) CallContractAtHash(ctx context.Context, call ethereum.CallMsg, blockHash common.Hash) ([]byte, error) {
|
||||
b.mu.Lock()
|
||||
defer b.mu.Unlock()
|
||||
|
||||
if blockHash != b.blockchain.CurrentBlock().Hash() {
|
||||
return nil, errBlockHashUnsupported
|
||||
}
|
||||
return b.callContractAtHead(ctx, call)
|
||||
}
|
||||
|
||||
// callContractAtHead executes a contract call against the latest block state.
|
||||
func (b *SimulatedBackend) callContractAtHead(ctx context.Context, call ethereum.CallMsg) ([]byte, error) {
|
||||
stateDB, err := b.blockchain.State()
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
res, err := b.callContract(ctx, call, b.blockchain.CurrentBlock(), stateDB)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
// If the result contains a revert reason, try to unpack and return it.
|
||||
if len(res.Revert()) > 0 {
|
||||
return nil, newRevertError(res)
|
||||
}
|
||||
return res.Return(), res.Err
|
||||
}
|
||||
|
||||
// PendingCallContract executes a contract call on the pending state.
|
||||
func (b *SimulatedBackend) PendingCallContract(ctx context.Context, call ethereum.CallMsg) ([]byte, error) {
|
||||
b.mu.Lock()
|
||||
defer b.mu.Unlock()
|
||||
defer b.pendingState.RevertToSnapshot(b.pendingState.Snapshot())
|
||||
|
||||
res, err := b.callContract(ctx, call, b.pendingBlock.Header(), b.pendingState)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
// If the result contains a revert reason, try to unpack and return it.
|
||||
if len(res.Revert()) > 0 {
|
||||
return nil, newRevertError(res)
|
||||
}
|
||||
return res.Return(), res.Err
|
||||
}
|
||||
|
||||
// PendingNonceAt implements PendingStateReader.PendingNonceAt, retrieving
|
||||
// the nonce currently pending for the account.
|
||||
func (b *SimulatedBackend) PendingNonceAt(ctx context.Context, account common.Address) (uint64, error) {
|
||||
b.mu.Lock()
|
||||
defer b.mu.Unlock()
|
||||
|
||||
return b.pendingState.GetOrNewStateObject(account).Nonce(), nil
|
||||
}
|
||||
|
||||
// SuggestGasPrice implements ContractTransactor.SuggestGasPrice. Since the simulated
|
||||
// chain doesn't have miners, we just return a gas price of 1 for any call.
|
||||
func (b *SimulatedBackend) SuggestGasPrice(ctx context.Context) (*big.Int, error) {
|
||||
b.mu.Lock()
|
||||
defer b.mu.Unlock()
|
||||
|
||||
if b.pendingBlock.Header().BaseFee != nil {
|
||||
return b.pendingBlock.Header().BaseFee, nil
|
||||
}
|
||||
return big.NewInt(1), nil
|
||||
}
|
||||
|
||||
// SuggestGasTipCap implements ContractTransactor.SuggestGasTipCap. Since the simulated
|
||||
// chain doesn't have miners, we just return a gas tip of 1 for any call.
|
||||
func (b *SimulatedBackend) SuggestGasTipCap(ctx context.Context) (*big.Int, error) {
|
||||
return big.NewInt(1), nil
|
||||
}
|
||||
|
||||
// EstimateGas executes the requested code against the currently pending block/state and
|
||||
// returns the used amount of gas.
|
||||
func (b *SimulatedBackend) EstimateGas(ctx context.Context, call ethereum.CallMsg) (uint64, error) {
|
||||
b.mu.Lock()
|
||||
defer b.mu.Unlock()
|
||||
|
||||
// Determine the lowest and highest possible gas limits to binary search in between
|
||||
var (
|
||||
lo uint64 = params.TxGas - 1
|
||||
hi uint64
|
||||
cap uint64
|
||||
)
|
||||
if call.Gas >= params.TxGas {
|
||||
hi = call.Gas
|
||||
} else {
|
||||
hi = b.pendingBlock.GasLimit()
|
||||
}
|
||||
// Normalize the max fee per gas the call is willing to spend.
|
||||
var feeCap *big.Int
|
||||
if call.GasPrice != nil && (call.GasFeeCap != nil || call.GasTipCap != nil) {
|
||||
return 0, errors.New("both gasPrice and (maxFeePerGas or maxPriorityFeePerGas) specified")
|
||||
} else if call.GasPrice != nil {
|
||||
feeCap = call.GasPrice
|
||||
} else if call.GasFeeCap != nil {
|
||||
feeCap = call.GasFeeCap
|
||||
} else {
|
||||
feeCap = common.Big0
|
||||
}
|
||||
// Recap the highest gas allowance with account's balance.
|
||||
if feeCap.BitLen() != 0 {
|
||||
balance := b.pendingState.GetBalance(call.From) // from can't be nil
|
||||
available := new(big.Int).Set(balance)
|
||||
if call.Value != nil {
|
||||
if call.Value.Cmp(available) >= 0 {
|
||||
return 0, core.ErrInsufficientFundsForTransfer
|
||||
}
|
||||
available.Sub(available, call.Value)
|
||||
}
|
||||
allowance := new(big.Int).Div(available, feeCap)
|
||||
if allowance.IsUint64() && hi > allowance.Uint64() {
|
||||
transfer := call.Value
|
||||
if transfer == nil {
|
||||
transfer = new(big.Int)
|
||||
}
|
||||
log.Warn("Gas estimation capped by limited funds", "original", hi, "balance", balance,
|
||||
"sent", transfer, "feecap", feeCap, "fundable", allowance)
|
||||
hi = allowance.Uint64()
|
||||
}
|
||||
}
|
||||
cap = hi
|
||||
|
||||
// Create a helper to check if a gas allowance results in an executable transaction
|
||||
executable := func(gas uint64) (bool, *core.ExecutionResult, error) {
|
||||
call.Gas = gas
|
||||
|
||||
snapshot := b.pendingState.Snapshot()
|
||||
res, err := b.callContract(ctx, call, b.pendingBlock.Header(), b.pendingState)
|
||||
b.pendingState.RevertToSnapshot(snapshot)
|
||||
|
||||
if err != nil {
|
||||
if errors.Is(err, core.ErrIntrinsicGas) {
|
||||
return true, nil, nil // Special case, raise gas limit
|
||||
}
|
||||
return true, nil, err // Bail out
|
||||
}
|
||||
return res.Failed(), res, nil
|
||||
}
|
||||
// Execute the binary search and hone in on an executable gas limit
|
||||
for lo+1 < hi {
|
||||
mid := (hi + lo) / 2
|
||||
failed, _, err := executable(mid)
|
||||
|
||||
// If the error is not nil(consensus error), it means the provided message
|
||||
// call or transaction will never be accepted no matter how much gas it is
|
||||
// assigned. Return the error directly, don't struggle any more
|
||||
if err != nil {
|
||||
return 0, err
|
||||
}
|
||||
if failed {
|
||||
lo = mid
|
||||
} else {
|
||||
hi = mid
|
||||
}
|
||||
}
|
||||
// Reject the transaction as invalid if it still fails at the highest allowance
|
||||
if hi == cap {
|
||||
failed, result, err := executable(hi)
|
||||
if err != nil {
|
||||
return 0, err
|
||||
}
|
||||
if failed {
|
||||
if result != nil && !errors.Is(result.Err, vm.ErrOutOfGas) {
|
||||
if len(result.Revert()) > 0 {
|
||||
return 0, newRevertError(result)
|
||||
}
|
||||
return 0, result.Err
|
||||
}
|
||||
// Otherwise, the specified gas cap is too low
|
||||
return 0, fmt.Errorf("gas required exceeds allowance (%d)", cap)
|
||||
}
|
||||
}
|
||||
return hi, nil
|
||||
}
|
||||
|
||||
// callContract implements common code between normal and pending contract calls.
|
||||
// state is modified during execution, make sure to copy it if necessary.
|
||||
func (b *SimulatedBackend) callContract(ctx context.Context, call ethereum.CallMsg, header *types.Header, stateDB *state.StateDB) (*core.ExecutionResult, error) {
|
||||
// Gas prices post 1559 need to be initialized
|
||||
if call.GasPrice != nil && (call.GasFeeCap != nil || call.GasTipCap != nil) {
|
||||
return nil, errors.New("both gasPrice and (maxFeePerGas or maxPriorityFeePerGas) specified")
|
||||
}
|
||||
if !b.blockchain.Config().IsLondon(header.Number) {
|
||||
// If there's no basefee, then it must be a non-1559 execution
|
||||
if call.GasPrice == nil {
|
||||
call.GasPrice = new(big.Int)
|
||||
}
|
||||
call.GasFeeCap, call.GasTipCap = call.GasPrice, call.GasPrice
|
||||
} else {
|
||||
// A basefee is provided, necessitating 1559-type execution
|
||||
if call.GasPrice != nil {
|
||||
// User specified the legacy gas field, convert to 1559 gas typing
|
||||
call.GasFeeCap, call.GasTipCap = call.GasPrice, call.GasPrice
|
||||
} else {
|
||||
// User specified 1559 gas fields (or none), use those
|
||||
if call.GasFeeCap == nil {
|
||||
call.GasFeeCap = new(big.Int)
|
||||
}
|
||||
if call.GasTipCap == nil {
|
||||
call.GasTipCap = new(big.Int)
|
||||
}
|
||||
// Backfill the legacy gasPrice for EVM execution, unless we're all zeroes
|
||||
call.GasPrice = new(big.Int)
|
||||
if call.GasFeeCap.BitLen() > 0 || call.GasTipCap.BitLen() > 0 {
|
||||
call.GasPrice = math.BigMin(new(big.Int).Add(call.GasTipCap, header.BaseFee), call.GasFeeCap)
|
||||
}
|
||||
}
|
||||
}
|
||||
// Ensure message is initialized properly.
|
||||
if call.Gas == 0 {
|
||||
call.Gas = 10 * header.GasLimit
|
||||
}
|
||||
if call.Value == nil {
|
||||
call.Value = new(big.Int)
|
||||
}
|
||||
|
||||
// Set infinite balance to the fake caller account.
|
||||
from := stateDB.GetOrNewStateObject(call.From)
|
||||
from.SetBalance(math.MaxBig256)
|
||||
|
||||
// Execute the call.
|
||||
msg := &core.Message{
|
||||
From: call.From,
|
||||
To: call.To,
|
||||
Value: call.Value,
|
||||
GasLimit: call.Gas,
|
||||
GasPrice: call.GasPrice,
|
||||
GasFeeCap: call.GasFeeCap,
|
||||
GasTipCap: call.GasTipCap,
|
||||
Data: call.Data,
|
||||
AccessList: call.AccessList,
|
||||
SkipAccountChecks: true,
|
||||
}
|
||||
|
||||
// Create a new environment which holds all relevant information
|
||||
// about the transaction and calling mechanisms.
|
||||
txContext := core.NewEVMTxContext(msg)
|
||||
evmContext := core.NewEVMBlockContext(header, b.blockchain, nil)
|
||||
vmEnv := vm.NewEVM(evmContext, txContext, stateDB, b.config, vm.Config{NoBaseFee: true})
|
||||
gasPool := new(core.GasPool).AddGas(math.MaxUint64)
|
||||
|
||||
return core.ApplyMessage(vmEnv, msg, gasPool)
|
||||
}
|
||||
|
||||
// SendTransaction updates the pending block to include the given transaction.
|
||||
func (b *SimulatedBackend) SendTransaction(ctx context.Context, tx *types.Transaction) error {
|
||||
b.mu.Lock()
|
||||
defer b.mu.Unlock()
|
||||
|
||||
// Get the last block
|
||||
block, err := b.blockByHash(ctx, b.pendingBlock.ParentHash())
|
||||
if err != nil {
|
||||
return errors.New("could not fetch parent")
|
||||
}
|
||||
// Check transaction validity
|
||||
signer := types.MakeSigner(b.blockchain.Config(), block.Number(), block.Time())
|
||||
sender, err := types.Sender(signer, tx)
|
||||
if err != nil {
|
||||
return fmt.Errorf("invalid transaction: %v", err)
|
||||
}
|
||||
nonce := b.pendingState.GetNonce(sender)
|
||||
if tx.Nonce() != nonce {
|
||||
return fmt.Errorf("invalid transaction nonce: got %d, want %d", tx.Nonce(), nonce)
|
||||
}
|
||||
// Include tx in chain
|
||||
blocks, receipts := core.GenerateChain(b.config, block, ethash.NewFaker(), b.database, 1, func(number int, block *core.BlockGen) {
|
||||
for _, tx := range b.pendingBlock.Transactions() {
|
||||
block.AddTxWithChain(b.blockchain, tx)
|
||||
}
|
||||
block.AddTxWithChain(b.blockchain, tx)
|
||||
})
|
||||
stateDB, err := b.blockchain.State()
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
b.pendingBlock = blocks[0]
|
||||
b.pendingState, _ = state.New(b.pendingBlock.Root(), stateDB.Database(), nil)
|
||||
b.pendingReceipts = receipts[0]
|
||||
return nil
|
||||
}
|
||||
|
||||
// FilterLogs executes a log filter operation, blocking during execution and
|
||||
// returning all the results in one batch.
|
||||
//
|
||||
// TODO(karalabe): Deprecate when the subscription one can return past data too.
|
||||
func (b *SimulatedBackend) FilterLogs(ctx context.Context, query ethereum.FilterQuery) ([]types.Log, error) {
|
||||
var filter *filters.Filter
|
||||
if query.BlockHash != nil {
|
||||
// Block filter requested, construct a single-shot filter
|
||||
filter = b.filterSystem.NewBlockFilter(*query.BlockHash, query.Addresses, query.Topics)
|
||||
} else {
|
||||
// Initialize unset filter boundaries to run from genesis to chain head
|
||||
from := int64(0)
|
||||
if query.FromBlock != nil {
|
||||
from = query.FromBlock.Int64()
|
||||
}
|
||||
to := int64(-1)
|
||||
if query.ToBlock != nil {
|
||||
to = query.ToBlock.Int64()
|
||||
}
|
||||
// Construct the range filter
|
||||
filter = b.filterSystem.NewRangeFilter(from, to, query.Addresses, query.Topics)
|
||||
}
|
||||
// Run the filter and return all the logs
|
||||
logs, err := filter.Logs(ctx)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
res := make([]types.Log, len(logs))
|
||||
for i, nLog := range logs {
|
||||
res[i] = *nLog
|
||||
}
|
||||
return res, nil
|
||||
}
|
||||
|
||||
// SubscribeFilterLogs creates a background log filtering operation, returning a
|
||||
// subscription immediately, which can be used to stream the found events.
|
||||
func (b *SimulatedBackend) SubscribeFilterLogs(ctx context.Context, query ethereum.FilterQuery, ch chan<- types.Log) (ethereum.Subscription, error) {
|
||||
// Subscribe to contract events
|
||||
sink := make(chan []*types.Log)
|
||||
|
||||
sub, err := b.events.SubscribeLogs(query, sink)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
// Since we're getting logs in batches, we need to flatten them into a plain stream
|
||||
return event.NewSubscription(func(quit <-chan struct{}) error {
|
||||
defer sub.Unsubscribe()
|
||||
for {
|
||||
select {
|
||||
case logs := <-sink:
|
||||
for _, nlog := range logs {
|
||||
select {
|
||||
case ch <- *nlog:
|
||||
case err := <-sub.Err():
|
||||
return err
|
||||
case <-quit:
|
||||
return nil
|
||||
}
|
||||
}
|
||||
case err := <-sub.Err():
|
||||
return err
|
||||
case <-quit:
|
||||
return nil
|
||||
}
|
||||
}
|
||||
}), nil
|
||||
}
|
||||
|
||||
// SubscribeNewHead returns an event subscription for a new header.
|
||||
func (b *SimulatedBackend) SubscribeNewHead(ctx context.Context, ch chan<- *types.Header) (ethereum.Subscription, error) {
|
||||
// subscribe to a new head
|
||||
sink := make(chan *types.Header)
|
||||
sub := b.events.SubscribeNewHeads(sink)
|
||||
|
||||
return event.NewSubscription(func(quit <-chan struct{}) error {
|
||||
defer sub.Unsubscribe()
|
||||
for {
|
||||
select {
|
||||
case head := <-sink:
|
||||
select {
|
||||
case ch <- head:
|
||||
case err := <-sub.Err():
|
||||
return err
|
||||
case <-quit:
|
||||
return nil
|
||||
}
|
||||
case err := <-sub.Err():
|
||||
return err
|
||||
case <-quit:
|
||||
return nil
|
||||
}
|
||||
}
|
||||
}), nil
|
||||
}
|
||||
|
||||
// AdjustTime adds a time shift to the simulated clock.
|
||||
// It can only be called on empty blocks.
|
||||
func (b *SimulatedBackend) AdjustTime(adjustment time.Duration) error {
|
||||
b.mu.Lock()
|
||||
defer b.mu.Unlock()
|
||||
|
||||
if len(b.pendingBlock.Transactions()) != 0 {
|
||||
return errors.New("could not adjust time on non-empty block")
|
||||
}
|
||||
// Get the last block
|
||||
block := b.blockchain.GetBlockByHash(b.pendingBlock.ParentHash())
|
||||
if block == nil {
|
||||
return errors.New("could not find parent")
|
||||
}
|
||||
|
||||
blocks, _ := core.GenerateChain(b.config, block, ethash.NewFaker(), b.database, 1, func(number int, block *core.BlockGen) {
|
||||
block.OffsetTime(int64(adjustment.Seconds()))
|
||||
})
|
||||
stateDB, err := b.blockchain.State()
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
b.pendingBlock = blocks[0]
|
||||
b.pendingState, _ = state.New(b.pendingBlock.Root(), stateDB.Database(), nil)
|
||||
return nil
|
||||
}
|
||||
|
||||
// Blockchain returns the underlying blockchain.
|
||||
func (b *SimulatedBackend) Blockchain() *core.BlockChain {
|
||||
return b.blockchain
|
||||
}
|
||||
|
||||
// filterBackend implements filters.Backend to support filtering for logs without
|
||||
// taking bloom-bits acceleration structures into account.
|
||||
type filterBackend struct {
|
||||
db ethdb.Database
|
||||
bc *core.BlockChain
|
||||
backend *SimulatedBackend
|
||||
}
|
||||
|
||||
func (fb *filterBackend) ChainDb() ethdb.Database { return fb.db }
|
||||
|
||||
func (fb *filterBackend) EventMux() *event.TypeMux { panic("not supported") }
|
||||
|
||||
func (fb *filterBackend) HeaderByNumber(ctx context.Context, number rpc.BlockNumber) (*types.Header, error) {
|
||||
switch number {
|
||||
case rpc.PendingBlockNumber:
|
||||
if block := fb.backend.pendingBlock; block != nil {
|
||||
return block.Header(), nil
|
||||
}
|
||||
return nil, nil
|
||||
case rpc.LatestBlockNumber:
|
||||
return fb.bc.CurrentHeader(), nil
|
||||
case rpc.FinalizedBlockNumber:
|
||||
return fb.bc.CurrentFinalBlock(), nil
|
||||
case rpc.SafeBlockNumber:
|
||||
return fb.bc.CurrentSafeBlock(), nil
|
||||
default:
|
||||
return fb.bc.GetHeaderByNumber(uint64(number.Int64())), nil
|
||||
}
|
||||
}
|
||||
|
||||
func (fb *filterBackend) HeaderByHash(ctx context.Context, hash common.Hash) (*types.Header, error) {
|
||||
return fb.bc.GetHeaderByHash(hash), nil
|
||||
}
|
||||
|
||||
func (fb *filterBackend) GetBody(ctx context.Context, hash common.Hash, number rpc.BlockNumber) (*types.Body, error) {
|
||||
if body := fb.bc.GetBody(hash); body != nil {
|
||||
return body, nil
|
||||
}
|
||||
return nil, errors.New("block body not found")
|
||||
}
|
||||
|
||||
func (fb *filterBackend) PendingBlockAndReceipts() (*types.Block, types.Receipts) {
|
||||
return fb.backend.pendingBlock, fb.backend.pendingReceipts
|
||||
}
|
||||
|
||||
func (fb *filterBackend) GetReceipts(ctx context.Context, hash common.Hash) (types.Receipts, error) {
|
||||
number := rawdb.ReadHeaderNumber(fb.db, hash)
|
||||
if number == nil {
|
||||
return nil, nil
|
||||
}
|
||||
header := rawdb.ReadHeader(fb.db, hash, *number)
|
||||
if header == nil {
|
||||
return nil, nil
|
||||
}
|
||||
return rawdb.ReadReceipts(fb.db, hash, *number, header.Time, fb.bc.Config()), nil
|
||||
}
|
||||
|
||||
func (fb *filterBackend) GetLogs(ctx context.Context, hash common.Hash, number uint64) ([][]*types.Log, error) {
|
||||
logs := rawdb.ReadLogs(fb.db, hash, number)
|
||||
return logs, nil
|
||||
}
|
||||
|
||||
func (fb *filterBackend) SubscribeNewTxsEvent(ch chan<- core.NewTxsEvent) event.Subscription {
|
||||
return nullSubscription()
|
||||
}
|
||||
|
||||
func (fb *filterBackend) SubscribeChainEvent(ch chan<- core.ChainEvent) event.Subscription {
|
||||
return fb.bc.SubscribeChainEvent(ch)
|
||||
}
|
||||
|
||||
func (fb *filterBackend) SubscribeRemovedLogsEvent(ch chan<- core.RemovedLogsEvent) event.Subscription {
|
||||
return fb.bc.SubscribeRemovedLogsEvent(ch)
|
||||
}
|
||||
|
||||
func (fb *filterBackend) SubscribeLogsEvent(ch chan<- []*types.Log) event.Subscription {
|
||||
return fb.bc.SubscribeLogsEvent(ch)
|
||||
}
|
||||
|
||||
func (fb *filterBackend) SubscribePendingLogsEvent(ch chan<- []*types.Log) event.Subscription {
|
||||
return nullSubscription()
|
||||
}
|
||||
|
||||
func (fb *filterBackend) BloomStatus() (uint64, uint64) { return 4096, 0 }
|
||||
|
||||
func (fb *filterBackend) ServiceFilter(ctx context.Context, ms *bloombits.MatcherSession) {
|
||||
panic("not supported")
|
||||
}
|
||||
|
||||
func (fb *filterBackend) ChainConfig() *params.ChainConfig {
|
||||
panic("not supported")
|
||||
}
|
||||
|
||||
func (fb *filterBackend) CurrentHeader() *types.Header {
|
||||
panic("not supported")
|
||||
}
|
||||
|
||||
func nullSubscription() event.Subscription {
|
||||
return event.NewSubscription(func(quit <-chan struct{}) error {
|
||||
<-quit
|
||||
return nil
|
||||
})
|
||||
}
|
||||
|
||||
File diff suppressed because it is too large
Load Diff
@ -305,6 +305,7 @@ var bindTests = []struct {
|
||||
if err != nil {
|
||||
t.Fatalf("Failed to deploy interactor contract: %v", err)
|
||||
}
|
||||
sim.Commit()
|
||||
if _, err := interactor.Transact(auth, "Transact string"); err != nil {
|
||||
t.Fatalf("Failed to transact with interactor contract: %v", err)
|
||||
}
|
||||
@ -512,6 +513,7 @@ var bindTests = []struct {
|
||||
if err != nil {
|
||||
t.Fatalf("Failed to deploy defaulter contract: %v", err)
|
||||
}
|
||||
sim.Commit()
|
||||
if _, err := (&DefaulterRaw{defaulter}).Transfer(auth); err != nil {
|
||||
t.Fatalf("Failed to invoke default method: %v", err)
|
||||
}
|
||||
@ -1874,6 +1876,7 @@ var bindTests = []struct {
|
||||
[]string{"0x6080604052348015600f57600080fd5b5060998061001e6000396000f3fe6080604052348015600f57600080fd5b506004361060285760003560e01c8063726c638214602d575b600080fd5b60336035565b005b60405163024876cd60e61b815260016004820152600260248201526003604482015260640160405180910390fdfea264697066735822122093f786a1bc60216540cd999fbb4a6109e0fef20abcff6e9107fb2817ca968f3c64736f6c63430008070033"},
|
||||
[]string{`[{"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"MyError","type":"error"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"MyError1","type":"error"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"},{"internalType":"uint256","name":"","type":"uint256"}],"name":"MyError2","type":"error"},{"inputs":[{"internalType":"uint256","name":"a","type":"uint256"},{"internalType":"uint256","name":"b","type":"uint256"},{"internalType":"uint256","name":"c","type":"uint256"}],"name":"MyError3","type":"error"},{"inputs":[],"name":"Error","outputs":[],"stateMutability":"pure","type":"function"}]`},
|
||||
`
|
||||
"context"
|
||||
"math/big"
|
||||
|
||||
"github.com/ethereum/go-ethereum/accounts/abi/bind"
|
||||
@ -1895,7 +1898,7 @@ var bindTests = []struct {
|
||||
t.Fatal(err)
|
||||
}
|
||||
sim.Commit()
|
||||
_, err = bind.WaitDeployed(nil, sim, tx)
|
||||
_, err = bind.WaitDeployed(context.Background(), sim, tx)
|
||||
if err != nil {
|
||||
t.Error(err)
|
||||
}
|
||||
@ -1926,6 +1929,7 @@ var bindTests = []struct {
|
||||
bytecode: []string{`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`},
|
||||
abi: []string{`[{"inputs":[{"components":[{"internalType":"uint256","name":"field","type":"uint256"}],"internalType":"struct ConstructorWithStructParam.StructType","name":"st","type":"tuple"}],"stateMutability":"nonpayable","type":"constructor"}]`},
|
||||
imports: `
|
||||
"context"
|
||||
"math/big"
|
||||
|
||||
"github.com/ethereum/go-ethereum/accounts/abi/bind"
|
||||
@ -1948,7 +1952,7 @@ var bindTests = []struct {
|
||||
}
|
||||
sim.Commit()
|
||||
|
||||
if _, err = bind.WaitDeployed(nil, sim, tx); err != nil {
|
||||
if _, err = bind.WaitDeployed(context.Background(), sim, tx); err != nil {
|
||||
t.Logf("Deployment tx: %+v", tx)
|
||||
t.Errorf("bind.WaitDeployed(nil, %T, <deployment tx>) got err %v; want nil err", sim, err)
|
||||
}
|
||||
@ -1974,6 +1978,7 @@ var bindTests = []struct {
|
||||
bytecode: []string{"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"},
|
||||
abi: []string{`[ { "anonymous": false, "inputs": [ { "indexed": false, "internalType": "int256", "name": "msg", "type": "int256" }, { "indexed": false, "internalType": "int256", "name": "_msg", "type": "int256" } ], "name": "log", "type": "event" }, { "inputs": [ { "components": [ { "internalType": "bytes", "name": "data", "type": "bytes" }, { "internalType": "bytes", "name": "_data", "type": "bytes" } ], "internalType": "struct oracle.request", "name": "req", "type": "tuple" } ], "name": "addRequest", "outputs": [], "stateMutability": "pure", "type": "function" }, { "inputs": [], "name": "getRequest", "outputs": [ { "components": [ { "internalType": "bytes", "name": "data", "type": "bytes" }, { "internalType": "bytes", "name": "_data", "type": "bytes" } ], "internalType": "struct oracle.request", "name": "", "type": "tuple" } ], "stateMutability": "pure", "type": "function" } ]`},
|
||||
imports: `
|
||||
"context"
|
||||
"math/big"
|
||||
|
||||
"github.com/ethereum/go-ethereum/accounts/abi/bind"
|
||||
@ -1996,7 +2001,7 @@ var bindTests = []struct {
|
||||
}
|
||||
sim.Commit()
|
||||
|
||||
if _, err = bind.WaitDeployed(nil, sim, tx); err != nil {
|
||||
if _, err = bind.WaitDeployed(context.Background(), sim, tx); err != nil {
|
||||
t.Logf("Deployment tx: %+v", tx)
|
||||
t.Errorf("bind.WaitDeployed(nil, %T, <deployment tx>) got err %v; want nil err", sim, err)
|
||||
}
|
||||
@ -2014,6 +2019,7 @@ var bindTests = []struct {
|
||||
bytecode: []string{"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"},
|
||||
abi: []string{`[{"inputs":[{"internalType":"uint256","name":"range","type":"uint256"}],"name":"functionWithKeywordParameter","outputs":[],"stateMutability":"pure","type":"function"}]`},
|
||||
imports: `
|
||||
"context"
|
||||
"math/big"
|
||||
|
||||
"github.com/ethereum/go-ethereum/accounts/abi/bind"
|
||||
@ -2034,7 +2040,7 @@ var bindTests = []struct {
|
||||
}
|
||||
sim.Commit()
|
||||
|
||||
if _, err = bind.WaitDeployed(nil, sim, tx); err != nil {
|
||||
if _, err = bind.WaitDeployed(context.Background(), sim, tx); err != nil {
|
||||
t.Errorf("error deploying the contract: %v", err)
|
||||
}
|
||||
`,
|
||||
|
||||
@ -24,11 +24,12 @@ import (
|
||||
"time"
|
||||
|
||||
"github.com/ethereum/go-ethereum/accounts/abi/bind"
|
||||
"github.com/ethereum/go-ethereum/accounts/abi/bind/backends"
|
||||
"github.com/ethereum/go-ethereum/common"
|
||||
"github.com/ethereum/go-ethereum/core"
|
||||
"github.com/ethereum/go-ethereum/core/types"
|
||||
"github.com/ethereum/go-ethereum/crypto"
|
||||
"github.com/ethereum/go-ethereum/ethclient/simulated"
|
||||
"github.com/ethereum/go-ethereum/params"
|
||||
)
|
||||
|
||||
var testKey, _ = crypto.HexToECDSA("b71c71a67e1177ad4e901695e1b4b9ee17ae16c6668d313eac2f96dbcda3f291")
|
||||
@ -55,7 +56,7 @@ var waitDeployedTests = map[string]struct {
|
||||
func TestWaitDeployed(t *testing.T) {
|
||||
t.Parallel()
|
||||
for name, test := range waitDeployedTests {
|
||||
backend := backends.NewSimulatedBackend(
|
||||
backend := simulated.New(
|
||||
core.GenesisAlloc{
|
||||
crypto.PubkeyToAddress(testKey.PublicKey): {Balance: big.NewInt(10000000000000000)},
|
||||
},
|
||||
@ -64,11 +65,11 @@ func TestWaitDeployed(t *testing.T) {
|
||||
defer backend.Close()
|
||||
|
||||
// Create the transaction
|
||||
head, _ := backend.HeaderByNumber(context.Background(), nil) // Should be child's, good enough
|
||||
head, _ := backend.Client().HeaderByNumber(context.Background(), nil) // Should be child's, good enough
|
||||
gasPrice := new(big.Int).Add(head.BaseFee, big.NewInt(1))
|
||||
|
||||
tx := types.NewContractCreation(0, big.NewInt(0), test.gas, gasPrice, common.FromHex(test.code))
|
||||
tx, _ = types.SignTx(tx, types.HomesteadSigner{}, testKey)
|
||||
tx, _ = types.SignTx(tx, types.LatestSignerForChainID(big.NewInt(1337)), testKey)
|
||||
|
||||
// Wait for it to get mined in the background.
|
||||
var (
|
||||
@ -78,12 +79,12 @@ func TestWaitDeployed(t *testing.T) {
|
||||
ctx = context.Background()
|
||||
)
|
||||
go func() {
|
||||
address, err = bind.WaitDeployed(ctx, backend, tx)
|
||||
address, err = bind.WaitDeployed(ctx, backend.Client(), tx)
|
||||
close(mined)
|
||||
}()
|
||||
|
||||
// Send and mine the transaction.
|
||||
backend.SendTransaction(ctx, tx)
|
||||
backend.Client().SendTransaction(ctx, tx)
|
||||
backend.Commit()
|
||||
|
||||
select {
|
||||
@ -101,8 +102,7 @@ func TestWaitDeployed(t *testing.T) {
|
||||
}
|
||||
|
||||
func TestWaitDeployedCornerCases(t *testing.T) {
|
||||
t.Parallel()
|
||||
backend := backends.NewSimulatedBackend(
|
||||
backend := simulated.New(
|
||||
core.GenesisAlloc{
|
||||
crypto.PubkeyToAddress(testKey.PublicKey): {Balance: big.NewInt(10000000000000000)},
|
||||
},
|
||||
@ -110,33 +110,33 @@ func TestWaitDeployedCornerCases(t *testing.T) {
|
||||
)
|
||||
defer backend.Close()
|
||||
|
||||
head, _ := backend.HeaderByNumber(context.Background(), nil) // Should be child's, good enough
|
||||
head, _ := backend.Client().HeaderByNumber(context.Background(), nil) // Should be child's, good enough
|
||||
gasPrice := new(big.Int).Add(head.BaseFee, big.NewInt(1))
|
||||
|
||||
// Create a transaction to an account.
|
||||
code := "6060604052600a8060106000396000f360606040526008565b00"
|
||||
tx := types.NewTransaction(0, common.HexToAddress("0x01"), big.NewInt(0), 3000000, gasPrice, common.FromHex(code))
|
||||
tx, _ = types.SignTx(tx, types.HomesteadSigner{}, testKey)
|
||||
tx, _ = types.SignTx(tx, types.LatestSigner(params.AllDevChainProtocolChanges), testKey)
|
||||
ctx, cancel := context.WithCancel(context.Background())
|
||||
defer cancel()
|
||||
backend.SendTransaction(ctx, tx)
|
||||
backend.Client().SendTransaction(ctx, tx)
|
||||
backend.Commit()
|
||||
notContractCreation := errors.New("tx is not contract creation")
|
||||
if _, err := bind.WaitDeployed(ctx, backend, tx); err.Error() != notContractCreation.Error() {
|
||||
if _, err := bind.WaitDeployed(ctx, backend.Client(), tx); err.Error() != notContractCreation.Error() {
|
||||
t.Errorf("error mismatch: want %q, got %q, ", notContractCreation, err)
|
||||
}
|
||||
|
||||
// Create a transaction that is not mined.
|
||||
tx = types.NewContractCreation(1, big.NewInt(0), 3000000, gasPrice, common.FromHex(code))
|
||||
tx, _ = types.SignTx(tx, types.HomesteadSigner{}, testKey)
|
||||
tx, _ = types.SignTx(tx, types.LatestSigner(params.AllDevChainProtocolChanges), testKey)
|
||||
|
||||
go func() {
|
||||
contextCanceled := errors.New("context canceled")
|
||||
if _, err := bind.WaitDeployed(ctx, backend, tx); err.Error() != contextCanceled.Error() {
|
||||
if _, err := bind.WaitDeployed(ctx, backend.Client(), tx); err.Error() != contextCanceled.Error() {
|
||||
t.Errorf("error mismatch: want %q, got %q, ", contextCanceled, err)
|
||||
}
|
||||
}()
|
||||
|
||||
backend.SendTransaction(ctx, tx)
|
||||
backend.Client().SendTransaction(ctx, tx)
|
||||
cancel()
|
||||
}
|
||||
|
||||
@ -19,16 +19,17 @@ package catalyst
|
||||
import (
|
||||
"crypto/rand"
|
||||
"errors"
|
||||
"math/big"
|
||||
"sync"
|
||||
"time"
|
||||
|
||||
"github.com/ethereum/go-ethereum/beacon/engine"
|
||||
"github.com/ethereum/go-ethereum/common"
|
||||
"github.com/ethereum/go-ethereum/core"
|
||||
"github.com/ethereum/go-ethereum/core/types"
|
||||
"github.com/ethereum/go-ethereum/eth"
|
||||
"github.com/ethereum/go-ethereum/log"
|
||||
"github.com/ethereum/go-ethereum/node"
|
||||
"github.com/ethereum/go-ethereum/params"
|
||||
"github.com/ethereum/go-ethereum/rpc"
|
||||
)
|
||||
|
||||
@ -81,6 +82,11 @@ type SimulatedBeacon struct {
|
||||
lastBlockTime uint64
|
||||
}
|
||||
|
||||
// NewSimulatedBeacon constructs a new simulated beacon chain.
|
||||
// Period sets the period in which blocks should be produced.
|
||||
//
|
||||
// - If period is set to 0, a block is produced on every transaction.
|
||||
// via Commit, Fork and AdjustTime.
|
||||
func NewSimulatedBeacon(period uint64, eth *eth.Ethereum) (*SimulatedBeacon, error) {
|
||||
block := eth.BlockChain().CurrentBlock()
|
||||
current := engine.ForkchoiceStateV1{
|
||||
@ -116,7 +122,9 @@ func (c *SimulatedBeacon) setFeeRecipient(feeRecipient common.Address) {
|
||||
// Start invokes the SimulatedBeacon life-cycle function in a goroutine.
|
||||
func (c *SimulatedBeacon) Start() error {
|
||||
if c.period == 0 {
|
||||
go c.loopOnDemand()
|
||||
// if period is set to 0, do not mine at all
|
||||
// this is used in the simulated backend where blocks
|
||||
// are explicitly mined via Commit, AdjustTime and Fork
|
||||
} else {
|
||||
go c.loop()
|
||||
}
|
||||
@ -131,10 +139,9 @@ func (c *SimulatedBeacon) Stop() error {
|
||||
|
||||
// sealBlock initiates payload building for a new block and creates a new block
|
||||
// with the completed payload.
|
||||
func (c *SimulatedBeacon) sealBlock(withdrawals []*types.Withdrawal) error {
|
||||
tstamp := uint64(time.Now().Unix())
|
||||
if tstamp <= c.lastBlockTime {
|
||||
tstamp = c.lastBlockTime + 1
|
||||
func (c *SimulatedBeacon) sealBlock(withdrawals []*types.Withdrawal, timestamp uint64) error {
|
||||
if timestamp <= c.lastBlockTime {
|
||||
timestamp = c.lastBlockTime + 1
|
||||
}
|
||||
c.feeRecipientLock.Lock()
|
||||
feeRecipient := c.feeRecipient
|
||||
@ -149,7 +156,7 @@ func (c *SimulatedBeacon) sealBlock(withdrawals []*types.Withdrawal) error {
|
||||
var random [32]byte
|
||||
rand.Read(random[:])
|
||||
fcResponse, err := c.engineAPI.ForkchoiceUpdatedV2(c.curForkchoiceState, &engine.PayloadAttributes{
|
||||
Timestamp: tstamp,
|
||||
Timestamp: timestamp,
|
||||
SuggestedFeeRecipient: feeRecipient,
|
||||
Withdrawals: withdrawals,
|
||||
Random: random,
|
||||
@ -183,6 +190,7 @@ func (c *SimulatedBeacon) sealBlock(withdrawals []*types.Withdrawal) error {
|
||||
return err
|
||||
}
|
||||
c.setCurrentState(payload.BlockHash, finalizedHash)
|
||||
|
||||
// Mark the block containing the payload as canonical
|
||||
if _, err = c.engineAPI.ForkchoiceUpdatedV2(c.curForkchoiceState, nil); err != nil {
|
||||
return err
|
||||
@ -191,32 +199,6 @@ func (c *SimulatedBeacon) sealBlock(withdrawals []*types.Withdrawal) error {
|
||||
return nil
|
||||
}
|
||||
|
||||
// loopOnDemand runs the block production loop for "on-demand" configuration (period = 0)
|
||||
func (c *SimulatedBeacon) loopOnDemand() {
|
||||
var (
|
||||
newTxs = make(chan core.NewTxsEvent)
|
||||
sub = c.eth.TxPool().SubscribeTransactions(newTxs, true)
|
||||
)
|
||||
defer sub.Unsubscribe()
|
||||
|
||||
for {
|
||||
select {
|
||||
case <-c.shutdownCh:
|
||||
return
|
||||
case w := <-c.withdrawals.pending:
|
||||
withdrawals := append(c.withdrawals.gatherPending(9), w)
|
||||
if err := c.sealBlock(withdrawals); err != nil {
|
||||
log.Warn("Error performing sealing work", "err", err)
|
||||
}
|
||||
case <-newTxs:
|
||||
withdrawals := c.withdrawals.gatherPending(10)
|
||||
if err := c.sealBlock(withdrawals); err != nil {
|
||||
log.Warn("Error performing sealing work", "err", err)
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// loop runs the block production loop for non-zero period configuration
|
||||
func (c *SimulatedBeacon) loop() {
|
||||
timer := time.NewTimer(0)
|
||||
@ -226,7 +208,7 @@ func (c *SimulatedBeacon) loop() {
|
||||
return
|
||||
case <-timer.C:
|
||||
withdrawals := c.withdrawals.gatherPending(10)
|
||||
if err := c.sealBlock(withdrawals); err != nil {
|
||||
if err := c.sealBlock(withdrawals, uint64(time.Now().Unix())); err != nil {
|
||||
log.Warn("Error performing sealing work", "err", err)
|
||||
} else {
|
||||
timer.Reset(time.Second * time.Duration(c.period))
|
||||
@ -235,8 +217,8 @@ func (c *SimulatedBeacon) loop() {
|
||||
}
|
||||
}
|
||||
|
||||
// finalizedBlockHash returns the block hash of the finalized block corresponding to the given number
|
||||
// or nil if doesn't exist in the chain.
|
||||
// finalizedBlockHash returns the block hash of the finalized block corresponding
|
||||
// to the given number or nil if doesn't exist in the chain.
|
||||
func (c *SimulatedBeacon) finalizedBlockHash(number uint64) *common.Hash {
|
||||
var finalizedNumber uint64
|
||||
if number%devEpochLength == 0 {
|
||||
@ -244,7 +226,6 @@ func (c *SimulatedBeacon) finalizedBlockHash(number uint64) *common.Hash {
|
||||
} else {
|
||||
finalizedNumber = (number - 1) / devEpochLength * devEpochLength
|
||||
}
|
||||
|
||||
if finalizedBlock := c.eth.BlockChain().GetBlockByNumber(finalizedNumber); finalizedBlock != nil {
|
||||
fh := finalizedBlock.Hash()
|
||||
return &fh
|
||||
@ -261,11 +242,60 @@ func (c *SimulatedBeacon) setCurrentState(headHash, finalizedHash common.Hash) {
|
||||
}
|
||||
}
|
||||
|
||||
// Commit seals a block on demand.
|
||||
func (c *SimulatedBeacon) Commit() common.Hash {
|
||||
withdrawals := c.withdrawals.gatherPending(10)
|
||||
if err := c.sealBlock(withdrawals, uint64(time.Now().Unix())); err != nil {
|
||||
log.Warn("Error performing sealing work", "err", err)
|
||||
}
|
||||
return c.eth.BlockChain().CurrentBlock().Hash()
|
||||
}
|
||||
|
||||
// Rollback un-sends previously added transactions.
|
||||
func (c *SimulatedBeacon) Rollback() {
|
||||
// Flush all transactions from the transaction pools
|
||||
maxUint256 := new(big.Int).Sub(new(big.Int).Lsh(common.Big1, 256), common.Big1)
|
||||
c.eth.TxPool().SetGasTip(maxUint256)
|
||||
// Set the gas tip back to accept new transactions
|
||||
// TODO (Marius van der Wijden): set gas tip to parameter passed by config
|
||||
c.eth.TxPool().SetGasTip(big.NewInt(params.GWei))
|
||||
}
|
||||
|
||||
// Fork sets the head to the provided hash.
|
||||
func (c *SimulatedBeacon) Fork(parentHash common.Hash) error {
|
||||
if len(c.eth.TxPool().Pending(false)) != 0 {
|
||||
return errors.New("pending block dirty")
|
||||
}
|
||||
parent := c.eth.BlockChain().GetBlockByHash(parentHash)
|
||||
if parent == nil {
|
||||
return errors.New("parent not found")
|
||||
}
|
||||
return c.eth.BlockChain().SetHead(parent.NumberU64())
|
||||
}
|
||||
|
||||
// AdjustTime creates a new block with an adjusted timestamp.
|
||||
func (c *SimulatedBeacon) AdjustTime(adjustment time.Duration) error {
|
||||
if len(c.eth.TxPool().Pending(false)) != 0 {
|
||||
return errors.New("could not adjust time on non-empty block")
|
||||
}
|
||||
parent := c.eth.BlockChain().CurrentBlock()
|
||||
if parent == nil {
|
||||
return errors.New("parent not found")
|
||||
}
|
||||
withdrawals := c.withdrawals.gatherPending(10)
|
||||
return c.sealBlock(withdrawals, parent.Time+uint64(adjustment))
|
||||
}
|
||||
|
||||
func RegisterSimulatedBeaconAPIs(stack *node.Node, sim *SimulatedBeacon) {
|
||||
api := &api{sim}
|
||||
if sim.period == 0 {
|
||||
// mine on demand if period is set to 0
|
||||
go api.loop()
|
||||
}
|
||||
stack.RegisterAPIs([]rpc.API{
|
||||
{
|
||||
Namespace: "dev",
|
||||
Service: &api{sim},
|
||||
Service: api,
|
||||
Version: "1.0",
|
||||
},
|
||||
})
|
||||
|
||||
@ -18,19 +18,44 @@ package catalyst
|
||||
|
||||
import (
|
||||
"context"
|
||||
"time"
|
||||
|
||||
"github.com/ethereum/go-ethereum/common"
|
||||
"github.com/ethereum/go-ethereum/core"
|
||||
"github.com/ethereum/go-ethereum/core/types"
|
||||
"github.com/ethereum/go-ethereum/log"
|
||||
)
|
||||
|
||||
type api struct {
|
||||
simBeacon *SimulatedBeacon
|
||||
sim *SimulatedBeacon
|
||||
}
|
||||
|
||||
func (a *api) loop() {
|
||||
var (
|
||||
newTxs = make(chan core.NewTxsEvent)
|
||||
sub = a.sim.eth.TxPool().SubscribeTransactions(newTxs, true)
|
||||
)
|
||||
defer sub.Unsubscribe()
|
||||
|
||||
for {
|
||||
select {
|
||||
case <-a.sim.shutdownCh:
|
||||
return
|
||||
case w := <-a.sim.withdrawals.pending:
|
||||
withdrawals := append(a.sim.withdrawals.gatherPending(9), w)
|
||||
if err := a.sim.sealBlock(withdrawals, uint64(time.Now().Unix())); err != nil {
|
||||
log.Warn("Error performing sealing work", "err", err)
|
||||
}
|
||||
case <-newTxs:
|
||||
a.sim.Commit()
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
func (a *api) AddWithdrawal(ctx context.Context, withdrawal *types.Withdrawal) error {
|
||||
return a.simBeacon.withdrawals.add(withdrawal)
|
||||
return a.sim.withdrawals.add(withdrawal)
|
||||
}
|
||||
|
||||
func (a *api) SetFeeRecipient(ctx context.Context, feeRecipient common.Address) {
|
||||
a.simBeacon.setFeeRecipient(feeRecipient)
|
||||
a.sim.setFeeRecipient(feeRecipient)
|
||||
}
|
||||
|
||||
190
ethclient/simulated/backend.go
Normal file
190
ethclient/simulated/backend.go
Normal file
@ -0,0 +1,190 @@
|
||||
// Copyright 2023 The go-ethereum Authors
|
||||
// This file is part of the go-ethereum library.
|
||||
//
|
||||
// The go-ethereum library is free software: you can redistribute it and/or modify
|
||||
// it under the terms of the GNU Lesser General Public License as published by
|
||||
// the Free Software Foundation, either version 3 of the License, or
|
||||
// (at your option) any later version.
|
||||
//
|
||||
// The go-ethereum library is distributed in the hope that it will be useful,
|
||||
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
// GNU Lesser General Public License for more details.
|
||||
//
|
||||
// You should have received a copy of the GNU Lesser General Public License
|
||||
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
|
||||
|
||||
package simulated
|
||||
|
||||
import (
|
||||
"time"
|
||||
|
||||
"github.com/ethereum/go-ethereum"
|
||||
"github.com/ethereum/go-ethereum/common"
|
||||
"github.com/ethereum/go-ethereum/core"
|
||||
"github.com/ethereum/go-ethereum/eth"
|
||||
"github.com/ethereum/go-ethereum/eth/catalyst"
|
||||
"github.com/ethereum/go-ethereum/eth/downloader"
|
||||
"github.com/ethereum/go-ethereum/eth/ethconfig"
|
||||
"github.com/ethereum/go-ethereum/eth/filters"
|
||||
"github.com/ethereum/go-ethereum/ethclient"
|
||||
"github.com/ethereum/go-ethereum/node"
|
||||
"github.com/ethereum/go-ethereum/p2p"
|
||||
"github.com/ethereum/go-ethereum/params"
|
||||
"github.com/ethereum/go-ethereum/rpc"
|
||||
)
|
||||
|
||||
// Backend is a simulated blockchain. You can use it to test your contracts or
|
||||
// other code that interacts with the Ethereum chain.
|
||||
type Backend struct {
|
||||
eth *eth.Ethereum
|
||||
beacon *catalyst.SimulatedBeacon
|
||||
client simClient
|
||||
}
|
||||
|
||||
// simClient wraps ethclient. This exists to prevent extracting ethclient.Client
|
||||
// from the Client interface returned by Backend.
|
||||
type simClient struct {
|
||||
*ethclient.Client
|
||||
}
|
||||
|
||||
// Client exposes the methods provided by the Ethereum RPC client.
|
||||
type Client interface {
|
||||
ethereum.BlockNumberReader
|
||||
ethereum.ChainReader
|
||||
ethereum.ChainStateReader
|
||||
ethereum.ContractCaller
|
||||
ethereum.GasEstimator
|
||||
ethereum.GasPricer
|
||||
ethereum.GasPricer1559
|
||||
ethereum.FeeHistoryReader
|
||||
ethereum.LogFilterer
|
||||
ethereum.PendingStateReader
|
||||
ethereum.PendingContractCaller
|
||||
ethereum.TransactionReader
|
||||
ethereum.TransactionSender
|
||||
ethereum.ChainIDReader
|
||||
}
|
||||
|
||||
// New creates a new binding backend using a simulated blockchain
|
||||
// for testing purposes.
|
||||
// A simulated backend always uses chainID 1337.
|
||||
func New(alloc core.GenesisAlloc, gasLimit uint64) *Backend {
|
||||
// Setup the node object
|
||||
nodeConf := node.DefaultConfig
|
||||
nodeConf.DataDir = ""
|
||||
nodeConf.P2P = p2p.Config{NoDiscovery: true}
|
||||
stack, err := node.New(&nodeConf)
|
||||
if err != nil {
|
||||
// This should never happen, if it does, please open an issue
|
||||
panic(err)
|
||||
}
|
||||
|
||||
// Setup ethereum
|
||||
genesis := core.Genesis{
|
||||
Config: params.AllDevChainProtocolChanges,
|
||||
GasLimit: gasLimit,
|
||||
Alloc: alloc,
|
||||
}
|
||||
conf := ethconfig.Defaults
|
||||
conf.Genesis = &genesis
|
||||
conf.SyncMode = downloader.FullSync
|
||||
conf.TxPool.NoLocals = true
|
||||
sim, err := newWithNode(stack, &conf, 0)
|
||||
if err != nil {
|
||||
// This should never happen, if it does, please open an issue
|
||||
panic(err)
|
||||
}
|
||||
return sim
|
||||
}
|
||||
|
||||
// newWithNode sets up a simulated backend on an existing node
|
||||
// this allows users to do persistent simulations.
|
||||
// The provided node must not be started and will be started by newWithNode
|
||||
func newWithNode(stack *node.Node, conf *eth.Config, blockPeriod uint64) (*Backend, error) {
|
||||
backend, err := eth.New(stack, conf)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
// Register the filter system
|
||||
filterSystem := filters.NewFilterSystem(backend.APIBackend, filters.Config{})
|
||||
stack.RegisterAPIs([]rpc.API{{
|
||||
Namespace: "eth",
|
||||
Service: filters.NewFilterAPI(filterSystem, false),
|
||||
}})
|
||||
|
||||
// Start the node
|
||||
if err := stack.Start(); err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
// Set up the simulated beacon
|
||||
beacon, err := catalyst.NewSimulatedBeacon(blockPeriod, backend)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
// Reorg our chain back to genesis
|
||||
if err := beacon.Fork(backend.BlockChain().GetCanonicalHash(0)); err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
return &Backend{
|
||||
eth: backend,
|
||||
beacon: beacon,
|
||||
client: simClient{ethclient.NewClient(stack.Attach())},
|
||||
}, nil
|
||||
}
|
||||
|
||||
// Close shuts down the simBackend.
|
||||
// The simulated backend can't be used afterwards.
|
||||
func (n *Backend) Close() error {
|
||||
if n.client.Client != nil {
|
||||
n.client.Close()
|
||||
n.client = simClient{}
|
||||
}
|
||||
if n.beacon != nil {
|
||||
err := n.beacon.Stop()
|
||||
n.beacon = nil
|
||||
return err
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
// Commit seals a block and moves the chain forward to a new empty block.
|
||||
func (n *Backend) Commit() common.Hash {
|
||||
return n.beacon.Commit()
|
||||
}
|
||||
|
||||
// Rollback removes all pending transactions, reverting to the last committed state.
|
||||
func (n *Backend) Rollback() {
|
||||
n.beacon.Rollback()
|
||||
}
|
||||
|
||||
// Fork creates a side-chain that can be used to simulate reorgs.
|
||||
//
|
||||
// This function should be called with the ancestor block where the new side
|
||||
// chain should be started. Transactions (old and new) can then be applied on
|
||||
// top and Commit-ed.
|
||||
//
|
||||
// Note, the side-chain will only become canonical (and trigger the events) when
|
||||
// it becomes longer. Until then CallContract will still operate on the current
|
||||
// canonical chain.
|
||||
//
|
||||
// There is a % chance that the side chain becomes canonical at the same length
|
||||
// to simulate live network behavior.
|
||||
func (n *Backend) Fork(parentHash common.Hash) error {
|
||||
return n.beacon.Fork(parentHash)
|
||||
}
|
||||
|
||||
// AdjustTime changes the block timestamp and creates a new block.
|
||||
// It can only be called on empty blocks.
|
||||
func (n *Backend) AdjustTime(adjustment time.Duration) error {
|
||||
return n.beacon.AdjustTime(adjustment)
|
||||
}
|
||||
|
||||
// Client returns a client that accesses the simulated chain.
|
||||
func (n *Backend) Client() Client {
|
||||
return n.client
|
||||
}
|
||||
309
ethclient/simulated/backend_test.go
Normal file
309
ethclient/simulated/backend_test.go
Normal file
@ -0,0 +1,309 @@
|
||||
// Copyright 2019 The go-ethereum Authors
|
||||
// This file is part of the go-ethereum library.
|
||||
//
|
||||
// The go-ethereum library is free software: you can redistribute it and/or modify
|
||||
// it under the terms of the GNU Lesser General Public License as published by
|
||||
// the Free Software Foundation, either version 3 of the License, or
|
||||
// (at your option) any later version.
|
||||
//
|
||||
// The go-ethereum library is distributed in the hope that it will be useful,
|
||||
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
// GNU Lesser General Public License for more details.
|
||||
//
|
||||
// You should have received a copy of the GNU Lesser General Public License
|
||||
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
|
||||
|
||||
package simulated
|
||||
|
||||
import (
|
||||
"context"
|
||||
"crypto/ecdsa"
|
||||
"math/big"
|
||||
"math/rand"
|
||||
"testing"
|
||||
"time"
|
||||
|
||||
"github.com/ethereum/go-ethereum/accounts/abi/bind"
|
||||
"github.com/ethereum/go-ethereum/common"
|
||||
"github.com/ethereum/go-ethereum/core"
|
||||
"github.com/ethereum/go-ethereum/core/types"
|
||||
"github.com/ethereum/go-ethereum/crypto"
|
||||
"github.com/ethereum/go-ethereum/params"
|
||||
)
|
||||
|
||||
var _ bind.ContractBackend = (Client)(nil)
|
||||
|
||||
var (
|
||||
testKey, _ = crypto.HexToECDSA("b71c71a67e1177ad4e901695e1b4b9ee17ae16c6668d313eac2f96dbcda3f291")
|
||||
testAddr = crypto.PubkeyToAddress(testKey.PublicKey)
|
||||
)
|
||||
|
||||
func simTestBackend(testAddr common.Address) *Backend {
|
||||
return New(
|
||||
core.GenesisAlloc{
|
||||
testAddr: {Balance: big.NewInt(10000000000000000)},
|
||||
}, 10000000,
|
||||
)
|
||||
}
|
||||
|
||||
func newTx(sim *Backend, key *ecdsa.PrivateKey) (*types.Transaction, error) {
|
||||
client := sim.Client()
|
||||
|
||||
// create a signed transaction to send
|
||||
head, _ := client.HeaderByNumber(context.Background(), nil) // Should be child's, good enough
|
||||
gasPrice := new(big.Int).Add(head.BaseFee, big.NewInt(1))
|
||||
addr := crypto.PubkeyToAddress(key.PublicKey)
|
||||
chainid, _ := client.ChainID(context.Background())
|
||||
nonce, err := client.PendingNonceAt(context.Background(), addr)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
tx := types.NewTx(&types.DynamicFeeTx{
|
||||
ChainID: chainid,
|
||||
Nonce: nonce,
|
||||
GasTipCap: big.NewInt(1),
|
||||
GasFeeCap: gasPrice,
|
||||
Gas: 21000,
|
||||
To: &addr,
|
||||
})
|
||||
return types.SignTx(tx, types.LatestSignerForChainID(chainid), key)
|
||||
}
|
||||
|
||||
func TestNewSim(t *testing.T) {
|
||||
sim := New(core.GenesisAlloc{}, 30_000_000)
|
||||
defer sim.Close()
|
||||
|
||||
client := sim.Client()
|
||||
num, err := client.BlockNumber(context.Background())
|
||||
if err != nil {
|
||||
t.Fatal(err)
|
||||
}
|
||||
if num != 0 {
|
||||
t.Fatalf("expected 0 got %v", num)
|
||||
}
|
||||
// Create a block
|
||||
sim.Commit()
|
||||
num, err = client.BlockNumber(context.Background())
|
||||
if err != nil {
|
||||
t.Fatal(err)
|
||||
}
|
||||
if num != 1 {
|
||||
t.Fatalf("expected 1 got %v", num)
|
||||
}
|
||||
}
|
||||
|
||||
func TestAdjustTime(t *testing.T) {
|
||||
sim := New(core.GenesisAlloc{}, 10_000_000)
|
||||
defer sim.Close()
|
||||
|
||||
client := sim.Client()
|
||||
block1, _ := client.BlockByNumber(context.Background(), nil)
|
||||
|
||||
// Create a block
|
||||
if err := sim.AdjustTime(time.Minute); err != nil {
|
||||
t.Fatal(err)
|
||||
}
|
||||
block2, _ := client.BlockByNumber(context.Background(), nil)
|
||||
prevTime := block1.Time()
|
||||
newTime := block2.Time()
|
||||
if newTime-prevTime != uint64(time.Minute) {
|
||||
t.Errorf("adjusted time not equal to 60 seconds. prev: %v, new: %v", prevTime, newTime)
|
||||
}
|
||||
}
|
||||
|
||||
func TestSendTransaction(t *testing.T) {
|
||||
sim := simTestBackend(testAddr)
|
||||
defer sim.Close()
|
||||
|
||||
client := sim.Client()
|
||||
ctx := context.Background()
|
||||
|
||||
signedTx, err := newTx(sim, testKey)
|
||||
if err != nil {
|
||||
t.Errorf("could not create transaction: %v", err)
|
||||
}
|
||||
// send tx to simulated backend
|
||||
err = client.SendTransaction(ctx, signedTx)
|
||||
if err != nil {
|
||||
t.Errorf("could not add tx to pending block: %v", err)
|
||||
}
|
||||
sim.Commit()
|
||||
block, err := client.BlockByNumber(ctx, big.NewInt(1))
|
||||
if err != nil {
|
||||
t.Errorf("could not get block at height 1: %v", err)
|
||||
}
|
||||
|
||||
if signedTx.Hash() != block.Transactions()[0].Hash() {
|
||||
t.Errorf("did not commit sent transaction. expected hash %v got hash %v", block.Transactions()[0].Hash(), signedTx.Hash())
|
||||
}
|
||||
}
|
||||
|
||||
// TestFork check that the chain length after a reorg is correct.
|
||||
// Steps:
|
||||
// 1. Save the current block which will serve as parent for the fork.
|
||||
// 2. Mine n blocks with n ∈ [0, 20].
|
||||
// 3. Assert that the chain length is n.
|
||||
// 4. Fork by using the parent block as ancestor.
|
||||
// 5. Mine n+1 blocks which should trigger a reorg.
|
||||
// 6. Assert that the chain length is n+1.
|
||||
// Since Commit() was called 2n+1 times in total,
|
||||
// having a chain length of just n+1 means that a reorg occurred.
|
||||
func TestFork(t *testing.T) {
|
||||
t.Parallel()
|
||||
testAddr := crypto.PubkeyToAddress(testKey.PublicKey)
|
||||
sim := simTestBackend(testAddr)
|
||||
defer sim.Close()
|
||||
|
||||
client := sim.Client()
|
||||
ctx := context.Background()
|
||||
|
||||
// 1.
|
||||
parent, _ := client.HeaderByNumber(ctx, nil)
|
||||
|
||||
// 2.
|
||||
n := int(rand.Int31n(21))
|
||||
for i := 0; i < n; i++ {
|
||||
sim.Commit()
|
||||
}
|
||||
|
||||
// 3.
|
||||
b, _ := client.BlockNumber(ctx)
|
||||
if b != uint64(n) {
|
||||
t.Error("wrong chain length")
|
||||
}
|
||||
|
||||
// 4.
|
||||
sim.Fork(parent.Hash())
|
||||
|
||||
// 5.
|
||||
for i := 0; i < n+1; i++ {
|
||||
sim.Commit()
|
||||
}
|
||||
|
||||
// 6.
|
||||
b, _ = client.BlockNumber(ctx)
|
||||
if b != uint64(n+1) {
|
||||
t.Error("wrong chain length")
|
||||
}
|
||||
}
|
||||
|
||||
// TestForkResendTx checks that re-sending a TX after a fork
|
||||
// is possible and does not cause a "nonce mismatch" panic.
|
||||
// Steps:
|
||||
// 1. Save the current block which will serve as parent for the fork.
|
||||
// 2. Send a transaction.
|
||||
// 3. Check that the TX is included in block 1.
|
||||
// 4. Fork by using the parent block as ancestor.
|
||||
// 5. Mine a block, Re-send the transaction and mine another one.
|
||||
// 6. Check that the TX is now included in block 2.
|
||||
func TestForkResendTx(t *testing.T) {
|
||||
t.Parallel()
|
||||
testAddr := crypto.PubkeyToAddress(testKey.PublicKey)
|
||||
sim := simTestBackend(testAddr)
|
||||
defer sim.Close()
|
||||
|
||||
client := sim.Client()
|
||||
ctx := context.Background()
|
||||
|
||||
// 1.
|
||||
parent, _ := client.HeaderByNumber(ctx, nil)
|
||||
|
||||
// 2.
|
||||
tx, err := newTx(sim, testKey)
|
||||
if err != nil {
|
||||
t.Fatalf("could not create transaction: %v", err)
|
||||
}
|
||||
client.SendTransaction(ctx, tx)
|
||||
sim.Commit()
|
||||
|
||||
// 3.
|
||||
receipt, _ := client.TransactionReceipt(ctx, tx.Hash())
|
||||
if h := receipt.BlockNumber.Uint64(); h != 1 {
|
||||
t.Errorf("TX included in wrong block: %d", h)
|
||||
}
|
||||
|
||||
// 4.
|
||||
if err := sim.Fork(parent.Hash()); err != nil {
|
||||
t.Errorf("forking: %v", err)
|
||||
}
|
||||
|
||||
// 5.
|
||||
sim.Commit()
|
||||
if err := client.SendTransaction(ctx, tx); err != nil {
|
||||
t.Fatalf("sending transaction: %v", err)
|
||||
}
|
||||
sim.Commit()
|
||||
receipt, _ = client.TransactionReceipt(ctx, tx.Hash())
|
||||
if h := receipt.BlockNumber.Uint64(); h != 2 {
|
||||
t.Errorf("TX included in wrong block: %d", h)
|
||||
}
|
||||
}
|
||||
|
||||
func TestCommitReturnValue(t *testing.T) {
|
||||
t.Parallel()
|
||||
testAddr := crypto.PubkeyToAddress(testKey.PublicKey)
|
||||
sim := simTestBackend(testAddr)
|
||||
defer sim.Close()
|
||||
|
||||
client := sim.Client()
|
||||
ctx := context.Background()
|
||||
|
||||
// Test if Commit returns the correct block hash
|
||||
h1 := sim.Commit()
|
||||
cur, _ := client.HeaderByNumber(ctx, nil)
|
||||
if h1 != cur.Hash() {
|
||||
t.Error("Commit did not return the hash of the last block.")
|
||||
}
|
||||
|
||||
// Create a block in the original chain (containing a transaction to force different block hashes)
|
||||
head, _ := client.HeaderByNumber(ctx, nil) // Should be child's, good enough
|
||||
gasPrice := new(big.Int).Add(head.BaseFee, big.NewInt(1))
|
||||
_tx := types.NewTransaction(0, testAddr, big.NewInt(1000), params.TxGas, gasPrice, nil)
|
||||
tx, _ := types.SignTx(_tx, types.HomesteadSigner{}, testKey)
|
||||
client.SendTransaction(ctx, tx)
|
||||
|
||||
h2 := sim.Commit()
|
||||
|
||||
// Create another block in the original chain
|
||||
sim.Commit()
|
||||
|
||||
// Fork at the first bock
|
||||
if err := sim.Fork(h1); err != nil {
|
||||
t.Errorf("forking: %v", err)
|
||||
}
|
||||
|
||||
// Test if Commit returns the correct block hash after the reorg
|
||||
h2fork := sim.Commit()
|
||||
if h2 == h2fork {
|
||||
t.Error("The block in the fork and the original block are the same block!")
|
||||
}
|
||||
if header, err := client.HeaderByHash(ctx, h2fork); err != nil || header == nil {
|
||||
t.Error("Could not retrieve the just created block (side-chain)")
|
||||
}
|
||||
}
|
||||
|
||||
// TestAdjustTimeAfterFork ensures that after a fork, AdjustTime uses the pending fork
|
||||
// block's parent rather than the canonical head's parent.
|
||||
func TestAdjustTimeAfterFork(t *testing.T) {
|
||||
t.Parallel()
|
||||
testAddr := crypto.PubkeyToAddress(testKey.PublicKey)
|
||||
sim := simTestBackend(testAddr)
|
||||
defer sim.Close()
|
||||
|
||||
client := sim.Client()
|
||||
ctx := context.Background()
|
||||
|
||||
sim.Commit() // h1
|
||||
h1, _ := client.HeaderByNumber(ctx, nil)
|
||||
|
||||
sim.Commit() // h2
|
||||
sim.Fork(h1.Hash())
|
||||
sim.AdjustTime(1 * time.Second)
|
||||
sim.Commit()
|
||||
|
||||
head, _ := client.HeaderByNumber(ctx, nil)
|
||||
if head.Number.Uint64() == 2 && head.ParentHash != h1.Hash() {
|
||||
t.Errorf("failed to build block on fork")
|
||||
}
|
||||
}
|
||||
@ -199,6 +199,16 @@ type GasPricer interface {
|
||||
SuggestGasPrice(ctx context.Context) (*big.Int, error)
|
||||
}
|
||||
|
||||
// GasPricer1559 provides access to the EIP-1559 gas price oracle.
|
||||
type GasPricer1559 interface {
|
||||
SuggestGasTipCap(ctx context.Context) (*big.Int, error)
|
||||
}
|
||||
|
||||
// FeeHistoryReader provides access to the fee history oracle.
|
||||
type FeeHistoryReader interface {
|
||||
FeeHistory(ctx context.Context, blockCount uint64, lastBlock *big.Int, rewardPercentiles []float64) (*FeeHistory, error)
|
||||
}
|
||||
|
||||
// FeeHistory provides recent fee market data that consumers can use to determine
|
||||
// a reasonable maxPriorityFeePerGas value.
|
||||
type FeeHistory struct {
|
||||
@ -239,3 +249,13 @@ type GasEstimator interface {
|
||||
type PendingStateEventer interface {
|
||||
SubscribePendingTransactions(ctx context.Context, ch chan<- *types.Transaction) (Subscription, error)
|
||||
}
|
||||
|
||||
// BlockNumberReader provides access to the current block number.
|
||||
type BlockNumberReader interface {
|
||||
BlockNumber(ctx context.Context) (uint64, error)
|
||||
}
|
||||
|
||||
// ChainIDReader provides access to the chain ID.
|
||||
type ChainIDReader interface {
|
||||
ChainID(ctx context.Context) (*big.Int, error)
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user