backends

package
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Published: Aug 14, 2019 License: GPL-3.0 Imports: 21 Imported by: 0

Documentation

Overview

Package backends implements simulated bind contract backend for testing contract bindings.

Index

Constants

This section is empty.

Variables

This section is empty.

Functions

This section is empty.

Types

type SimulatedBackend

type SimulatedBackend struct {
	// contains filtered or unexported fields
}

SimulatedBackend implements bind.ContractBackend, simulating a blockchain in the background. Its main purpose is to allow easily testing contract bindings.

func NewSimulatedBackend

func NewSimulatedBackend(alloc blockchain.GenesisAlloc) *SimulatedBackend

NewSimulatedBackend creates a new binding backend using a simulated blockchain for testing purposes.

func (*SimulatedBackend) AdjustTime

func (b *SimulatedBackend) AdjustTime(adjustment time.Duration) error

AdjustTime adds a time shift to the simulated clock.

func (*SimulatedBackend) BalanceAt

func (b *SimulatedBackend) BalanceAt(ctx context.Context, contract common.Address, blockNumber *big.Int) (*big.Int, error)

BalanceAt returns the peb balance of a certain account in the blockchain.

func (*SimulatedBackend) CallContract

func (b *SimulatedBackend) CallContract(ctx context.Context, call klaytn.CallMsg, blockNumber *big.Int) ([]byte, error)

CallContract executes a contract call.

func (*SimulatedBackend) ChainID

func (b *SimulatedBackend) ChainID(ctx context.Context) (*big.Int, error)

ChainID can return the chain ID of the chain.

func (*SimulatedBackend) CodeAt

func (b *SimulatedBackend) CodeAt(ctx context.Context, contract common.Address, blockNumber *big.Int) ([]byte, error)

CodeAt returns the code associated with a certain account in the blockchain.

func (*SimulatedBackend) Commit

func (b *SimulatedBackend) Commit()

Commit imports all the pending transactions as a single block and starts a fresh new state.

func (*SimulatedBackend) EstimateGas

func (b *SimulatedBackend) EstimateGas(ctx context.Context, call klaytn.CallMsg) (uint64, error)

EstimateGas executes the requested code against the currently pending block/state and returns the used amount of gas.

func (*SimulatedBackend) FilterLogs

func (b *SimulatedBackend) FilterLogs(ctx context.Context, query klaytn.FilterQuery) ([]types.Log, error)

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 (*SimulatedBackend) NonceAt

func (b *SimulatedBackend) NonceAt(ctx context.Context, contract common.Address, blockNumber *big.Int) (uint64, error)

NonceAt returns the nonce of a certain account in the blockchain.

func (*SimulatedBackend) PendingCallContract

func (b *SimulatedBackend) PendingCallContract(ctx context.Context, call klaytn.CallMsg) ([]byte, error)

PendingCallContract executes a contract call on the pending state.

func (*SimulatedBackend) PendingCodeAt

func (b *SimulatedBackend) PendingCodeAt(ctx context.Context, contract common.Address) ([]byte, error)

PendingCodeAt returns the code associated with an account in the pending state.

func (*SimulatedBackend) PendingNonceAt

func (b *SimulatedBackend) PendingNonceAt(ctx context.Context, account common.Address) (uint64, error)

PendingNonceAt implements PendingStateReader.PendingNonceAt, retrieving the nonce currently pending for the account.

func (*SimulatedBackend) Rollback

func (b *SimulatedBackend) Rollback()

Rollback aborts all pending transactions, reverting to the last committed state.

func (*SimulatedBackend) SendTransaction

func (b *SimulatedBackend) SendTransaction(ctx context.Context, tx *types.Transaction) error

SendTransaction updates the pending block to include the given transaction. It panics if the transaction is invalid.

func (*SimulatedBackend) StorageAt

func (b *SimulatedBackend) StorageAt(ctx context.Context, contract common.Address, key common.Hash, blockNumber *big.Int) ([]byte, error)

StorageAt returns the value of key in the storage of an account in the blockchain.

func (*SimulatedBackend) SubscribeFilterLogs

func (b *SimulatedBackend) SubscribeFilterLogs(ctx context.Context, query klaytn.FilterQuery, ch chan<- types.Log) (klaytn.Subscription, error)

SubscribeFilterLogs creates a background log filtering operation, returning a subscription immediately, which can be used to stream the found events.

func (*SimulatedBackend) SuggestGasPrice

func (b *SimulatedBackend) SuggestGasPrice(ctx context.Context) (*big.Int, error)

SuggestGasPrice implements ContractTransactor.SuggestGasPrice. Since the simulated chain doens't have miners, we just return a gas price of 1 for any call.

func (*SimulatedBackend) TransactionReceipt

func (b *SimulatedBackend) TransactionReceipt(ctx context.Context, txHash common.Hash) (*types.Receipt, error)

TransactionReceipt returns the receipt of a transaction.

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