Documentation ¶
Overview ¶
Package sources exports a number of clients used to access ethereum chain data.
There are a number of these exported clients used by the pt-node: L1Client wraps an RPC client to retrieve L1 ethereum data. L2Client wraps an RPC client to retrieve L2 ethereum data. RollupClient wraps an RPC client to retrieve rollup data. EngineClient extends the L2Client providing engine API bindings.
Internally, the listed clients wrap an EthClient which itself wraps a specified RPC client.
Index ¶
- Variables
- func LimitRPC(c client.RPC, concurrentRequests int) client.RPC
- func NewReceiptsFetchingJob(requester ReceiptsRequester, client rpcClient, maxBatchSize int, ...) *receiptsFetchingJob
- func ValidRPCProviderKind(value RPCProviderKind) bool
- type BatchCallContextFn
- type CallContextFn
- type DebugClient
- type EngineClient
- func (s *EngineClient) ForkchoiceUpdate(ctx context.Context, fc *eth.ForkchoiceState, ...) (*eth.ForkchoiceUpdatedResult, error)
- func (s *EngineClient) GetPayload(ctx context.Context, payloadId eth.PayloadID) (*eth.ExecutionPayload, error)
- func (s *EngineClient) NewPayload(ctx context.Context, payload *eth.ExecutionPayload) (*eth.PayloadStatusV1, error)
- type EngineClientConfig
- type EthClient
- func (s *EthClient) ChainID(ctx context.Context) (*big.Int, error)
- func (s *EthClient) Close()
- func (s *EthClient) FetchReceipts(ctx context.Context, blockHash common.Hash) (eth.BlockInfo, types.Receipts, error)
- func (s *EthClient) GetProof(ctx context.Context, address common.Address, storage []common.Hash, ...) (*eth.AccountResult, error)
- func (s *EthClient) GetStorageAt(ctx context.Context, address common.Address, storageSlot common.Hash, ...) (common.Hash, error)
- func (s *EthClient) InfoAndTxsByHash(ctx context.Context, hash common.Hash) (eth.BlockInfo, types.Transactions, error)
- func (s *EthClient) InfoAndTxsByLabel(ctx context.Context, label eth.BlockLabel) (eth.BlockInfo, types.Transactions, error)
- func (s *EthClient) InfoAndTxsByNumber(ctx context.Context, number uint64) (eth.BlockInfo, types.Transactions, error)
- func (s *EthClient) InfoByHash(ctx context.Context, hash common.Hash) (eth.BlockInfo, error)
- func (s *EthClient) InfoByLabel(ctx context.Context, label eth.BlockLabel) (eth.BlockInfo, error)
- func (s *EthClient) InfoByNumber(ctx context.Context, number uint64) (eth.BlockInfo, error)
- func (s *EthClient) OnReceiptsMethodErr(m ReceiptsFetchingMethod, err error)
- func (s *EthClient) PayloadByHash(ctx context.Context, hash common.Hash) (*eth.ExecutionPayload, error)
- func (s *EthClient) PayloadByLabel(ctx context.Context, label eth.BlockLabel) (*eth.ExecutionPayload, error)
- func (s *EthClient) PayloadByNumber(ctx context.Context, number uint64) (*eth.ExecutionPayload, error)
- func (s *EthClient) PickReceiptsMethod(txCount uint64) ReceiptsFetchingMethod
- func (s *EthClient) ReadStorageAt(ctx context.Context, address common.Address, storageSlot common.Hash, ...) (common.Hash, error)
- func (s *EthClient) SubscribeNewHead(ctx context.Context, ch chan<- *types.Header) (ethereum.Subscription, error)
- type EthClientConfig
- type IterativeBatchCall
- type L1Client
- type L1ClientConfig
- type L2Client
- func (s *L2Client) L2BlockRefByHash(ctx context.Context, hash common.Hash) (eth.L2BlockRef, error)
- func (s *L2Client) L2BlockRefByLabel(ctx context.Context, label eth.BlockLabel) (eth.L2BlockRef, error)
- func (s *L2Client) L2BlockRefByNumber(ctx context.Context, num uint64) (eth.L2BlockRef, error)
- func (s *L2Client) SystemConfigByL2Hash(ctx context.Context, hash common.Hash) (eth.SystemConfig, error)
- type L2ClientConfig
- type RPCProviderKind
- type RPCSync
- type ReceiptsFetchingMethod
- type ReceiptsRequester
- type RollupClient
- func (r *RollupClient) OutputAtBlock(ctx context.Context, blockNum uint64) (*eth.OutputResponse, error)
- func (r *RollupClient) RollupConfig(ctx context.Context) (*rollup.Config, error)
- func (r *RollupClient) SyncStatus(ctx context.Context) (*eth.SyncStatus, error)
- func (r *RollupClient) Version(ctx context.Context) (string, error)
- type SyncClient
- type SyncClientConfig
Constants ¶
This section is empty.
Variables ¶
var ErrNoUnsafeL2PayloadChannel = errors.New("unsafeL2Payloads channel must not be nil")
var RPCProviderKinds = []RPCProviderKind{ RPCKindAlchemy, RPCKindQuickNode, RPCKindInfura, RPCKindParity, RPCKindNethermind, RPCKindDebugGeth, RPCKindErigon, RPCKindBasic, RPCKindAny, }
var RpcSyncPeer peer.ID = "ALT_RPC_SYNC"
RpcSyncPeer is a mock PeerID for the RPC sync client.
Functions ¶
func LimitRPC ¶
LimitRPC limits concurrent RPC requests (excluding subscriptions) to a given number by wrapping the client with a semaphore.
func NewReceiptsFetchingJob ¶
func ValidRPCProviderKind ¶
func ValidRPCProviderKind(value RPCProviderKind) bool
Types ¶
type BatchCallContextFn ¶
type CallContextFn ¶
type DebugClient ¶
type DebugClient struct {
// contains filtered or unexported fields
}
func NewDebugClient ¶
func NewDebugClient(callContext CallContextFn) *DebugClient
func (*DebugClient) CodeByHash ¶
func (*DebugClient) NodeByHash ¶
type EngineClient ¶
type EngineClient struct {
*L2Client
}
EngineClient extends L2Client with engine API bindings.
func NewEngineClient ¶
func NewEngineClient(client client.RPC, log log.Logger, metrics caching.Metrics, config *EngineClientConfig) (*EngineClient, error)
func (*EngineClient) ForkchoiceUpdate ¶
func (s *EngineClient) ForkchoiceUpdate(ctx context.Context, fc *eth.ForkchoiceState, attributes *eth.PayloadAttributes) (*eth.ForkchoiceUpdatedResult, error)
ForkchoiceUpdate updates the forkchoice on the execution client. If attributes is not nil, the engine client will also begin building a block based on attributes after the new head block and return the payload ID.
The RPC may return three types of errors: 1. Processing error: ForkchoiceUpdatedResult.PayloadStatusV1.ValidationError or other non-success PayloadStatusV1, 2. `error` as eth.InputError: the forkchoice state or attributes are not valid. 3. Other types of `error`: temporary RPC errors, like timeouts.
func (*EngineClient) GetPayload ¶
func (s *EngineClient) GetPayload(ctx context.Context, payloadId eth.PayloadID) (*eth.ExecutionPayload, error)
GetPayload gets the execution payload associated with the PayloadId. There may be two types of error: 1. `error` as eth.InputError: the payload ID may be unknown 2. Other types of `error`: temporary RPC errors, like timeouts.
func (*EngineClient) NewPayload ¶
func (s *EngineClient) NewPayload(ctx context.Context, payload *eth.ExecutionPayload) (*eth.PayloadStatusV1, error)
NewPayload executes a full block on the execution engine. This returns a PayloadStatusV1 which encodes any validation/processing error, and this type of error is kept separate from the returned `error` used for RPC errors, like timeouts.
type EngineClientConfig ¶
type EngineClientConfig struct {
L2ClientConfig
}
func EngineClientDefaultConfig ¶
func EngineClientDefaultConfig(config *rollup.Config) *EngineClientConfig
type EthClient ¶
type EthClient struct {
// contains filtered or unexported fields
}
EthClient retrieves ethereum data with optimized batch requests, cached results, and flag to not trust the RPC.
func NewEthClient ¶
func NewEthClient(client client.RPC, log log.Logger, metrics caching.Metrics, config *EthClientConfig) (*EthClient, error)
NewEthClient returns an EthClient, wrapping an RPC with bindings to fetch ethereum data with added error logging, metric tracking, and caching. The EthClient uses a LimitRPC wrapper to limit the number of concurrent RPC requests.
func (*EthClient) FetchReceipts ¶
func (s *EthClient) FetchReceipts(ctx context.Context, blockHash common.Hash) (eth.BlockInfo, types.Receipts, error)
FetchReceipts returns a block info and all of the receipts associated with transactions in the block. It verifies the receipt hash in the block header against the receipt hash of the fetched receipts to ensure that the execution engine did not fail to return any receipts.
func (*EthClient) GetProof ¶
func (s *EthClient) GetProof(ctx context.Context, address common.Address, storage []common.Hash, blockTag string) (*eth.AccountResult, error)
GetProof returns an account proof result, with any optional requested storage proofs. The retrieval does sanity-check that storage proofs for the expected keys are present in the response, but does not verify the result. Call accountResult.Verify(stateRoot) to verify the result.
func (*EthClient) GetStorageAt ¶
func (s *EthClient) GetStorageAt(ctx context.Context, address common.Address, storageSlot common.Hash, blockTag string) (common.Hash, error)
GetStorageAt returns the storage value at the given address and storage slot, **without verifying the correctness of the result**. This should only ever be used as alternative to GetProof when the user opts in. E.g. Erigon L1 node users may have to use this, since Erigon does not support eth_getProof, see https://github.com/ledgerwatch/erigon/issues/1349
func (*EthClient) InfoAndTxsByHash ¶
func (*EthClient) InfoAndTxsByLabel ¶
func (s *EthClient) InfoAndTxsByLabel(ctx context.Context, label eth.BlockLabel) (eth.BlockInfo, types.Transactions, error)
func (*EthClient) InfoAndTxsByNumber ¶
func (*EthClient) InfoByHash ¶
func (*EthClient) InfoByLabel ¶
func (*EthClient) InfoByNumber ¶
func (*EthClient) OnReceiptsMethodErr ¶
func (s *EthClient) OnReceiptsMethodErr(m ReceiptsFetchingMethod, err error)
func (*EthClient) PayloadByHash ¶
func (*EthClient) PayloadByLabel ¶
func (s *EthClient) PayloadByLabel(ctx context.Context, label eth.BlockLabel) (*eth.ExecutionPayload, error)
func (*EthClient) PayloadByNumber ¶
func (*EthClient) PickReceiptsMethod ¶
func (s *EthClient) PickReceiptsMethod(txCount uint64) ReceiptsFetchingMethod
func (*EthClient) ReadStorageAt ¶
func (s *EthClient) ReadStorageAt(ctx context.Context, address common.Address, storageSlot common.Hash, blockHash common.Hash) (common.Hash, error)
ReadStorageAt is a convenience method to read a single storage value at the given slot in the given account. The storage slot value is verified against the state-root of the given block if we do not trust the RPC provider, or directly retrieved without proof if we do trust the RPC.
type EthClientConfig ¶
type EthClientConfig struct { // Maximum number of requests to make per batch MaxRequestsPerBatch int // limit concurrent requests, applies to the source as a whole MaxConcurrentRequests int // Number of blocks worth of receipts to cache ReceiptsCacheSize int // Number of blocks worth of transactions to cache TransactionsCacheSize int // Number of block headers to cache HeadersCacheSize int // Number of payloads to cache PayloadsCacheSize int // If the RPC is untrusted, then we should not use cached information from responses, // and instead verify against the block-hash. // Of real L1 blocks no deposits can be missed/faked, no batches can be missed/faked, // only the wrong L1 blocks can be retrieved. TrustRPC bool // If the RPC must ensure that the results fit the ExecutionPayload(Header) format. // If this is not checked, disabled header fields like the nonce or difficulty // may be used to get a different block-hash. MustBePostMerge bool // RPCProviderKind is a hint at what type of RPC provider we are dealing with RPCProviderKind RPCProviderKind // Method reset duration defines how long we stick to available RPC methods, // till we re-attempt the user-preferred methods. // If this is 0 then the client does not fall back to less optimal but available methods. MethodResetDuration time.Duration }
func (*EthClientConfig) Check ¶
func (c *EthClientConfig) Check() error
type IterativeBatchCall ¶
IterativeBatchCall batches many RPC requests with safe and easy parallelization. Request errors are handled and re-tried, and the batch size is configurable. Executing IterativeBatchCall is as simple as calling Fetch repeatedly until it returns io.EOF.
func NewIterativeBatchCall ¶
func NewIterativeBatchCall[K any, V any]( requestsKeys []K, makeRequest func(K) (V, rpc.BatchElem), getBatch BatchCallContextFn, getSingle CallContextFn, batchSize int) *IterativeBatchCall[K, V]
NewIterativeBatchCall constructs a batch call, fetching the values with the given keys, and transforms them into a verified final result.
func (*IterativeBatchCall[K, V]) Complete ¶
func (ibc *IterativeBatchCall[K, V]) Complete() bool
Complete indicates if the batch call is done.
func (*IterativeBatchCall[K, V]) Fetch ¶
func (ibc *IterativeBatchCall[K, V]) Fetch(ctx context.Context) error
Fetch fetches more of the data, and returns io.EOF when all data has been fetched. This method is safe to call concurrently; it will parallelize the fetching work. If no work is available, but the fetching is not done yet, then Fetch will block until the next thing can be fetched, or until the context expires.
func (*IterativeBatchCall[K, V]) Reset ¶
func (ibc *IterativeBatchCall[K, V]) Reset()
Reset will clear the batch call, to start fetching all contents from scratch.
func (*IterativeBatchCall[K, V]) Result ¶
func (ibc *IterativeBatchCall[K, V]) Result() ([]V, error)
Result returns the fetched values, checked and transformed to the final output type, if available. If the check fails, the IterativeBatchCall will Reset itself, to be ready for a re-attempt in fetching new data.
type L1Client ¶
type L1Client struct { *EthClient // contains filtered or unexported fields }
L1Client provides typed bindings to retrieve L1 data from an RPC source, with optimized batch requests, cached results, and flag to not trust the RPC (i.e. to verify all returned contents against corresponding block hashes).
func NewL1Client ¶
func NewL1Client(client client.RPC, log log.Logger, metrics caching.Metrics, config *L1ClientConfig) (*L1Client, error)
NewL1Client wraps a RPC with bindings to fetch L1 data, while logging errors, tracking metrics (optional), and caching.
func (*L1Client) L1BlockRefByHash ¶
L1BlockRefByHash returns the eth.L1BlockRef for the given block hash. We cache the block reference by hash as it is safe to assume collision will not occur.
func (*L1Client) L1BlockRefByLabel ¶
func (s *L1Client) L1BlockRefByLabel(ctx context.Context, label eth.BlockLabel) (eth.L1BlockRef, error)
L1BlockRefByLabel returns the eth.L1BlockRef for the given block label. Notice, we cannot cache a block reference by label because labels are not guaranteed to be unique.
func (*L1Client) L1BlockRefByNumber ¶
L1BlockRefByNumber returns an eth.L1BlockRef for the given block number. Notice, we cannot cache a block reference by number because L1 re-orgs can invalidate the cached block reference.
type L1ClientConfig ¶
type L1ClientConfig struct { EthClientConfig L1BlockRefsCacheSize int }
func L1ClientDefaultConfig ¶
func L1ClientDefaultConfig(config *rollup.Config, trustRPC bool, kind RPCProviderKind) *L1ClientConfig
type L2Client ¶
type L2Client struct { *EthClient // contains filtered or unexported fields }
L2Client extends EthClient with functions to fetch and cache eth.L2BlockRef values.
func NewL2Client ¶
func NewL2Client(client client.RPC, log log.Logger, metrics caching.Metrics, config *L2ClientConfig) (*L2Client, error)
NewL2Client constructs a new L2Client instance. The L2Client is a thin wrapper around the EthClient with added functions for fetching and caching eth.L2BlockRef values. This includes fetching an L2BlockRef by block number, label, or hash. See: [L2BlockRefByLabel], [L2BlockRefByNumber], [L2BlockRefByHash]
func (*L2Client) L2BlockRefByHash ¶
L2BlockRefByHash returns the eth.L2BlockRef for the given block hash. The returned BlockRef may not be in the canonical chain.
func (*L2Client) L2BlockRefByLabel ¶
func (s *L2Client) L2BlockRefByLabel(ctx context.Context, label eth.BlockLabel) (eth.L2BlockRef, error)
L2BlockRefByLabel returns the eth.L2BlockRef for the given block label.
func (*L2Client) L2BlockRefByNumber ¶
L2BlockRefByNumber returns the eth.L2BlockRef for the given block number.
func (*L2Client) SystemConfigByL2Hash ¶
func (s *L2Client) SystemConfigByL2Hash(ctx context.Context, hash common.Hash) (eth.SystemConfig, error)
SystemConfigByL2Hash returns the eth.SystemConfig (matching the config updates up to and including the L1 origin) for the given L2 block hash. The returned eth.SystemConfig may not be in the canonical chain when the hash is not canonical.
type L2ClientConfig ¶
type L2ClientConfig struct { EthClientConfig L2BlockRefsCacheSize int L1ConfigsCacheSize int RollupCfg *rollup.Config }
func L2ClientDefaultConfig ¶
func L2ClientDefaultConfig(config *rollup.Config, trustRPC bool) *L2ClientConfig
type RPCProviderKind ¶
type RPCProviderKind string
RPCProviderKind identifies an RPC provider, used to hint at the optimal receipt fetching approach.
const ( RPCKindAlchemy RPCProviderKind = "alchemy" RPCKindQuickNode RPCProviderKind = "quicknode" RPCKindInfura RPCProviderKind = "infura" RPCKindParity RPCProviderKind = "parity" RPCKindNethermind RPCProviderKind = "nethermind" RPCKindDebugGeth RPCProviderKind = "debug_geth" RPCKindErigon RPCProviderKind = "erigon" RPCKindBasic RPCProviderKind = "basic" // try only the standard most basic receipt fetching RPCKindAny RPCProviderKind = "any" // try any method available )
func (*RPCProviderKind) Set ¶
func (kind *RPCProviderKind) Set(value string) error
func (RPCProviderKind) String ¶
func (kind RPCProviderKind) String() string
type ReceiptsFetchingMethod ¶
type ReceiptsFetchingMethod uint64
ReceiptsFetchingMethod is a bitfield with 1 bit for each receipts fetching type. Depending on errors, tx counts and preferences the code may select different sets of fetching methods.
const ( // EthGetTransactionReceiptBatch is standard per-tx receipt fetching with JSON-RPC batches. // Available in: standard, everywhere. // - Alchemy: 15 CU / tx // - Quicknode: 2 credits / tx // Method: eth_getTransactionReceipt // See: https://ethereum.github.io/execution-apis/api-documentation/ EthGetTransactionReceiptBatch ReceiptsFetchingMethod = 1 << iota // AlchemyGetTransactionReceipts is a special receipt fetching method provided by Alchemy. // Available in: // - Alchemy: 250 CU total // Method: alchemy_getTransactionReceipts // Params: // - object with "blockNumber" or "blockHash" field // Returns: "array of receipts" - docs lie, array is wrapped in a struct with single "receipts" field // See: https://docs.alchemy.com/reference/alchemy-gettransactionreceipts#alchemy_gettransactionreceipts AlchemyGetTransactionReceipts // DebugGetRawReceipts is a debug method from Geth, faster by avoiding serialization and metadata overhead. // Ideal for fast syncing from a local geth node. // Available in: // - Geth: free // - QuickNode: 22 credits maybe? Unknown price, undocumented ("debug_getblockreceipts" exists in table though?) // Method: debug_getRawReceipts // Params: // - string presenting a block number or hash // Returns: list of strings, hex encoded RLP of receipts data. "consensus-encoding of all receipts in a single block" // See: https://geth.ethereum.org/docs/rpc/ns-debug#debug_getrawreceipts DebugGetRawReceipts // ParityGetBlockReceipts is an old parity method, which has been adopted by Nethermind and some RPC providers. // Available in: // - Alchemy: 500 CU total // - QuickNode: 59 credits - docs are wrong, not actually available anymore. // - Any open-ethereum/parity legacy: free // - Nethermind: free // Method: parity_getBlockReceipts // Params: // Parity: "quantity or tag" // Alchemy: string with block hash, number in hex, or block tag. // Nethermind: very flexible: tag, number, hex or object with "requireCanonical"/"blockHash" fields. // Returns: array of receipts // See: // - Parity: https://openethereum.github.io/JSONRPC-parity-module#parity_getblockreceipts // - QuickNode: undocumented. // - Alchemy: https://docs.alchemy.com/reference/eth-getblockreceipts // - Nethermind: https://docs.nethermind.io/nethermind/ethereum-client/json-rpc/parity#parity_getblockreceipts ParityGetBlockReceipts // EthGetBlockReceipts is a non-standard receipt fetching method in the eth namespace, // supported by some RPC platforms and Erigon. // Available in: // - Alchemy: 500 CU total (and deprecated) // - Erigon: free // - QuickNode: 59 credits total (does not seem to work with block hash arg, inaccurate docs) // Method: eth_getBlockReceipts // Params: // - QuickNode: string, "quantity or tag", docs say incl. block hash, but API does not actually accept it. // - Alchemy: string, block hash / num (hex) / block tag // Returns: array of receipts // See: // - QuickNode: https://www.quicknode.com/docs/ethereum/eth_getBlockReceipts // - Alchemy: https://docs.alchemy.com/reference/eth-getblockreceipts EthGetBlockReceipts )
func AvailableReceiptsFetchingMethods ¶
func AvailableReceiptsFetchingMethods(kind RPCProviderKind) ReceiptsFetchingMethod
AvailableReceiptsFetchingMethods selects receipt fetching methods based on the RPC provider kind.
func PickBestReceiptsFetchingMethod ¶
func PickBestReceiptsFetchingMethod(kind RPCProviderKind, available ReceiptsFetchingMethod, txCount uint64) ReceiptsFetchingMethod
PickBestReceiptsFetchingMethod selects an RPC method that is still available, and optimal for fetching the given number of tx receipts from the specified provider kind.
func (ReceiptsFetchingMethod) String ¶
func (r ReceiptsFetchingMethod) String() string
type ReceiptsRequester ¶
type ReceiptsRequester interface { PickReceiptsMethod(txCount uint64) ReceiptsFetchingMethod OnReceiptsMethodErr(m ReceiptsFetchingMethod, err error) }
ReceiptsRequester helps determine which receipts fetching method can be used, and is given feedback upon receipt fetching errors to adapt the choice of method.
type RollupClient ¶
type RollupClient struct {
// contains filtered or unexported fields
}
func NewRollupClient ¶
func NewRollupClient(rpc client.RPC) *RollupClient
func (*RollupClient) OutputAtBlock ¶
func (r *RollupClient) OutputAtBlock(ctx context.Context, blockNum uint64) (*eth.OutputResponse, error)
func (*RollupClient) RollupConfig ¶
func (*RollupClient) SyncStatus ¶
func (r *RollupClient) SyncStatus(ctx context.Context) (*eth.SyncStatus, error)
type SyncClient ¶
type SyncClient struct { *L2Client // contains filtered or unexported fields }
SyncClient implements the driver AltSync interface, including support for fetching an open-ended chain of L2 blocks.
func NewSyncClient ¶
func NewSyncClient(receiver receivePayload, client client.RPC, log log.Logger, metrics caching.Metrics, config *SyncClientConfig) (*SyncClient, error)
func (*SyncClient) Close ¶
func (s *SyncClient) Close() error
Close sends a signal to close all concurrent syncing work.
func (*SyncClient) RequestL2Range ¶
func (s *SyncClient) RequestL2Range(ctx context.Context, start, end eth.L2BlockRef) error
func (*SyncClient) Start ¶
func (s *SyncClient) Start() error
Start starts the syncing background work. This may not be called after Close().
type SyncClientConfig ¶
type SyncClientConfig struct {
L2ClientConfig
}
func SyncClientDefaultConfig ¶
func SyncClientDefaultConfig(config *rollup.Config, trustRPC bool) *SyncClientConfig