backend

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Published: Jun 16, 2022 License: LGPL-3.0 Imports: 34 Imported by: 0

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Constants

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const ExceedBlockGasLimitError = "out of gas in location: block gas meter; gasWanted:"

ExceedBlockGasLimitError defines the error message when tx execution exceeds the block gas limit. The tx fee is deducted in ante handler, so it shouldn't be ignored in JSON-RPC API.

Variables

This section is empty.

Functions

func AllTxLogsFromEvents

func AllTxLogsFromEvents(events []abci.Event) ([][]*ethtypes.Log, error)

AllTxLogsFromEvents parses all ethereum logs from cosmos events

func ParseTxLogsFromEvent

func ParseTxLogsFromEvent(event abci.Event) ([]*ethtypes.Log, error)

ParseTxLogsFromEvent parse tx logs from one event

func ShouldIgnoreGasUsed

func ShouldIgnoreGasUsed(res *abci.ResponseDeliverTx) bool

ShouldIgnoreGasUsed returns true if the gasUsed in result should be ignored workaround for issue: https://github.com/cosmos/cosmos-sdk/issues/10832

func TxExceedBlockGasLimit

func TxExceedBlockGasLimit(res *abci.ResponseDeliverTx) bool

TxExceedBlockGasLimit returns true if the tx exceeds block gas limit.

func TxLogsFromEvents

func TxLogsFromEvents(events []abci.Event, msgIndex int) ([]*ethtypes.Log, error)

TxLogsFromEvents parses ethereum logs from cosmos events for specific msg index

func TxSuccessOrExceedsBlockGasLimit

func TxSuccessOrExceedsBlockGasLimit(res *abci.ResponseDeliverTx) bool

TxSuccessOrExceedsBlockGasLimit returns if the tx should be included in json-rpc responses

Types

type Backend

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

Backend implements the BackendI interface

func NewBackend

func NewBackend(ctx *server.Context, logger log.Logger, clientCtx client.Context) *Backend

NewBackend creates a new Backend instance for cosmos and ethereum namespaces

func (*Backend) BaseFee

func (b *Backend) BaseFee(height int64) (*big.Int, error)

BaseFee returns the base fee tracked by the Fee Market module. If the base fee is not enabled globally, the query returns nil. If the London hard fork is not activated at the current height, the query will return nil.

func (*Backend) BlockBloom

func (b *Backend) BlockBloom(height *int64) (ethtypes.Bloom, error)

BlockBloom query block bloom filter from block results

func (*Backend) BlockByHash

func (b *Backend) BlockByHash(hash common.Hash) (*ethtypes.Block, error)

BlockByHash returns the block identified by hash.

func (*Backend) BlockByNumber

func (b *Backend) BlockByNumber(blockNum types.BlockNumber) (*ethtypes.Block, error)

BlockByNumber returns the block identified by number.

func (*Backend) BlockNumber

func (b *Backend) BlockNumber() (hexutil.Uint64, error)

BlockNumber returns the current block number in abci app state. Because abci app state could lag behind from tendermint latest block, it's more stable for the client to use the latest block number in abci app state than tendermint rpc.

func (*Backend) BloomStatus

func (b *Backend) BloomStatus() (uint64, uint64)

BloomStatus returns the BloomBitsBlocks and the number of processed sections maintained by the chain indexer.

func (*Backend) ChainConfig

func (b *Backend) ChainConfig() *params.ChainConfig

ChainConfig returns the latest ethereum chain configuration

func (*Backend) CurrentHeader

func (b *Backend) CurrentHeader() *ethtypes.Header

CurrentHeader returns the latest block header

func (*Backend) EstimateGas

func (b *Backend) EstimateGas(args evmtypes.TransactionArgs, blockNrOptional *types.BlockNumber) (hexutil.Uint64, error)

EstimateGas returns an estimate of gas usage for the given smart contract call.

func (*Backend) EthBlockFromTendermint

func (b *Backend) EthBlockFromTendermint(
	resBlock *tmrpctypes.ResultBlock,
	fullTx bool,
) (map[string]interface{}, error)

EthBlockFromTendermint returns a JSON-RPC compatible Ethereum block from a given Tendermint block and its block result.

func (*Backend) EthBlockFromTm

func (b *Backend) EthBlockFromTm(resBlock *tmrpctypes.ResultBlock) (*ethtypes.Block, error)

func (*Backend) FeeHistory

func (b *Backend) FeeHistory(
	userBlockCount rpc.DecimalOrHex,
	lastBlock rpc.BlockNumber,
	rewardPercentiles []float64,
) (*types.FeeHistoryResult, error)

FeeHistory returns data relevant for fee estimation based on the specified range of blocks.

func (*Backend) GetBlockByHash

func (b *Backend) GetBlockByHash(hash common.Hash, fullTx bool) (map[string]interface{}, error)

GetBlockByHash returns the block identified by hash.

func (*Backend) GetBlockByNumber

func (b *Backend) GetBlockByNumber(blockNum types.BlockNumber, fullTx bool) (map[string]interface{}, error)

GetBlockByNumber returns the block identified by number.

func (*Backend) GetCoinbase

func (b *Backend) GetCoinbase() (sdk.AccAddress, error)

GetCoinbase is the address that staking rewards will be send to (alias for Etherbase).

func (*Backend) GetEthereumMsgsFromTendermintBlock

func (b *Backend) GetEthereumMsgsFromTendermintBlock(resBlock *tmrpctypes.ResultBlock, blockRes *tmrpctypes.ResultBlockResults) []*evmtypes.MsgEthereumTx

GetEthereumMsgsFromTendermintBlock returns all real MsgEthereumTxs from a Tendermint block. It also ensures consistency over the correct txs indexes across RPC endpoints

func (*Backend) GetLogs

func (b *Backend) GetLogs(hash common.Hash) ([][]*ethtypes.Log, error)

GetLogs returns all the logs from all the ethereum transactions in a block.

func (*Backend) GetLogsByHeight

func (b *Backend) GetLogsByHeight(height *int64) ([][]*ethtypes.Log, error)

GetLogsByHeight returns all the logs from all the ethereum transactions in a block.

func (*Backend) GetTendermintBlockByHash

func (b *Backend) GetTendermintBlockByHash(blockHash common.Hash) (*tmrpctypes.ResultBlock, error)

GetTendermintBlockByHash returns a Tendermint format block by block number

func (*Backend) GetTendermintBlockByNumber

func (b *Backend) GetTendermintBlockByNumber(blockNum types.BlockNumber) (*tmrpctypes.ResultBlock, error)

GetTendermintBlockByNumber returns a Tendermint format block by block number

func (*Backend) GetTransactionByHash

func (b *Backend) GetTransactionByHash(txHash common.Hash) (*types.RPCTransaction, error)

GetTransactionByHash returns the Ethereum format transaction identified by Ethereum transaction hash

func (*Backend) GetTransactionCount

func (b *Backend) GetTransactionCount(address common.Address, blockNum types.BlockNumber) (*hexutil.Uint64, error)

GetTransactionCount returns the number of transactions at the given address up to the given block number.

func (*Backend) GetTxByEthHash

func (b *Backend) GetTxByEthHash(hash common.Hash) (*tmrpctypes.ResultTx, error)

GetTxByEthHash uses `/tx_query` to find transaction by ethereum tx hash TODO: Don't need to convert once hashing is fixed on Tendermint https://github.com/tendermint/tendermint/issues/6539

func (*Backend) GetTxByTxIndex

func (b *Backend) GetTxByTxIndex(height int64, index uint) (*tmrpctypes.ResultTx, error)

GetTxByTxIndex uses `/tx_query` to find transaction by tx index of valid ethereum txs

func (*Backend) GlobalMinGasPrice

func (b *Backend) GlobalMinGasPrice() (sdk.Dec, error)

GlobalMinGasPrice returns MinGasPrice param from FeeMarket

func (*Backend) HeaderByHash

func (b *Backend) HeaderByHash(blockHash common.Hash) (*ethtypes.Header, error)

HeaderByHash returns the block header identified by hash.

func (*Backend) HeaderByNumber

func (b *Backend) HeaderByNumber(blockNum types.BlockNumber) (*ethtypes.Header, error)

HeaderByNumber returns the block header identified by height.

func (*Backend) PendingTransactions

func (b *Backend) PendingTransactions() ([]*sdk.Tx, error)

PendingTransactions returns the transactions that are in the transaction pool and have a from address that is one of the accounts this node manages.

func (*Backend) RPCBlockRangeCap

func (b *Backend) RPCBlockRangeCap() int32

RPCBlockRangeCap defines the max block range allowed for `eth_getLogs` query.

func (*Backend) RPCEVMTimeout

func (b *Backend) RPCEVMTimeout() time.Duration

RPCEVMTimeout is the global evm timeout for eth-call variants.

func (*Backend) RPCFeeHistoryCap

func (b *Backend) RPCFeeHistoryCap() int32

RPCFeeHistoryCap is the limit for total number of blocks that can be fetched

func (*Backend) RPCFilterCap

func (b *Backend) RPCFilterCap() int32

RPCFilterCap is the limit for total number of filters that can be created

func (*Backend) RPCGasCap

func (b *Backend) RPCGasCap() uint64

RPCGasCap is the global gas cap for eth-call variants.

func (*Backend) RPCLogsCap

func (b *Backend) RPCLogsCap() int32

RPCLogsCap defines the max number of results can be returned from single `eth_getLogs` query.

func (*Backend) RPCMinGasPrice

func (b *Backend) RPCMinGasPrice() int64

func (*Backend) RPCTxFeeCap

func (b *Backend) RPCTxFeeCap() float64

RPCGasCap is the global gas cap for eth-call variants.

func (*Backend) SendTransaction

func (b *Backend) SendTransaction(args evmtypes.TransactionArgs) (common.Hash, error)

func (*Backend) SetTxDefaults

func (b *Backend) SetTxDefaults(args evmtypes.TransactionArgs) (evmtypes.TransactionArgs, error)

SetTxDefaults populates tx message with default values in case they are not provided on the args

func (*Backend) SuggestGasTipCap

func (b *Backend) SuggestGasTipCap(baseFee *big.Int) (*big.Int, error)

SuggestGasTipCap returns the suggested tip cap Although we don't support tx prioritization yet, but we return a positive value to help client to mitigate the base fee changes.

type BackendI

type BackendI interface {
	CosmosBackend
	EVMBackend
}

BackendI implements the Cosmos and EVM backend.

type CosmosBackend

type CosmosBackend interface {
}

CosmosBackend implements the functionality shared within cosmos namespaces as defined by Wallet Connect V2: https://docs.walletconnect.com/2.0/json-rpc/cosmos. Implemented by Backend.

type EVMBackend

type EVMBackend interface {
	// General Ethereum API
	RPCGasCap() uint64            // global gas cap for eth_call over rpc: DoS protection
	RPCEVMTimeout() time.Duration // global timeout for eth_call over rpc: DoS protection
	RPCTxFeeCap() float64         // RPCTxFeeCap is the global transaction fee(price * gaslimit) cap for send-transaction variants. The unit is ether.

	RPCMinGasPrice() int64
	SuggestGasTipCap(baseFee *big.Int) (*big.Int, error)

	// Blockchain API
	BlockNumber() (hexutil.Uint64, error)
	GetTendermintBlockByNumber(blockNum types.BlockNumber) (*tmrpctypes.ResultBlock, error)
	GetTendermintBlockByHash(blockHash common.Hash) (*tmrpctypes.ResultBlock, error)
	GetBlockByNumber(blockNum types.BlockNumber, fullTx bool) (map[string]interface{}, error)
	GetBlockByHash(hash common.Hash, fullTx bool) (map[string]interface{}, error)
	BlockByNumber(blockNum types.BlockNumber) (*ethtypes.Block, error)
	BlockByHash(blockHash common.Hash) (*ethtypes.Block, error)
	CurrentHeader() *ethtypes.Header
	HeaderByNumber(blockNum types.BlockNumber) (*ethtypes.Header, error)
	HeaderByHash(blockHash common.Hash) (*ethtypes.Header, error)
	PendingTransactions() ([]*sdk.Tx, error)
	GetTransactionCount(address common.Address, blockNum types.BlockNumber) (*hexutil.Uint64, error)
	SendTransaction(args evmtypes.TransactionArgs) (common.Hash, error)
	GetCoinbase() (sdk.AccAddress, error)
	GetTransactionByHash(txHash common.Hash) (*types.RPCTransaction, error)
	GetTxByEthHash(txHash common.Hash) (*tmrpctypes.ResultTx, error)
	GetTxByTxIndex(height int64, txIndex uint) (*tmrpctypes.ResultTx, error)
	EstimateGas(args evmtypes.TransactionArgs, blockNrOptional *types.BlockNumber) (hexutil.Uint64, error)
	BaseFee(height int64) (*big.Int, error)
	GlobalMinGasPrice() (sdk.Dec, error)

	// Fee API
	FeeHistory(blockCount rpc.DecimalOrHex, lastBlock rpc.BlockNumber, rewardPercentiles []float64) (*types.FeeHistoryResult, error)

	// Filter API
	BloomStatus() (uint64, uint64)
	GetLogs(hash common.Hash) ([][]*ethtypes.Log, error)
	GetLogsByHeight(height *int64) ([][]*ethtypes.Log, error)
	ChainConfig() *params.ChainConfig
	SetTxDefaults(args evmtypes.TransactionArgs) (evmtypes.TransactionArgs, error)
	GetEthereumMsgsFromTendermintBlock(block *tmrpctypes.ResultBlock, blockRes *tmrpctypes.ResultBlockResults) []*evmtypes.MsgEthereumTx
}

EVMBackend implements the functionality shared within ethereum namespaces as defined by EIP-1474: https://github.com/ethereum/EIPs/blob/master/EIPS/eip-1474.md Implemented by Backend.

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