execdb

Documentation

Index

• type Block
• type BlocksSetter
• type Event
• type EventFilter
• type EventsProvider
• type EventsSetter
• type Order
• type Service
• type Transaction
• type TransactionBalanceChange
• type TransactionFilter
• type TransactionStateDiff
• type TransactionStateDiffsSetter
• type TransactionStorageChange
• type TransactionsProvider
• type TransactionsSetter

Types

type Block

type Block struct {
	Height          uint32
	Hash            []byte
	BaseFee         uint64
	Difficulty      uint64
	ExtraData       []byte
	GasLimit        uint32
	GasUsed         uint32
	FeeRecipient    []byte
	ParentHash      []byte
	Size            uint32
	StateRoot       []byte
	Timestamp       time.Time
	TotalDifficulty *big.Int
	Issuance        *big.Int
}

Block holds information about a block.

type BlocksSetter

type BlocksSetter interface {
	Service
	// SetBlock sets a block.
	SetBlock(ctx context.Context, block *Block) error

	// SetBlocks sets multiple blocks efficiently.
	SetBlocks(ctx context.Context, blocks []*Block) error
}

BlocksSetter defines functions to create and update blocks.

type Event

type Event struct {
	TransactionHash []byte
	BlockHeight     uint32
	Index           uint32 // aka LogIndex, index of the event in the block.
	Address         []byte
	Topics          [][]byte
	Data            []byte
}

Event holds information about a transaction event.

type EventFilter

type EventFilter struct {
	// Limit is the maximum number of events to return.
	Limit uint32

	// Order is either OrderEarliest, in which case the earliest results
	// that match the filter are returned, or OrderLatest, in which case the
	// latest results that match the filter are returned.
	// The default is OrderEarliest.
	Order Order

	// From is the height of the earliest block from which to fetch events.
	// If nil then there is no earliest block.
	From *uint32

	// To is the height of the latest block from which to fetch events.
	// If nil then there is no latest block.
	To *uint32

	// TransactionHash is the hash of the transaction that generated the event.
	// If nil then no filter is applied
	TransactionHash *[]byte

	// Address is the address of the contract that generated the event.
	// If nil then no filter is applied
	Address *[]byte
}

EventFilter defines a filter for fetching events. Filter elements are ANDed together. Results are always returned in ascending (block height, transaction index, event index) order.

type EventsProvider

type EventsProvider interface {
	// Events returns events matching the supplied filter.
	Events(ctx context.Context, filter *EventFilter) ([]*Event, error)
}

EventsProvider defines functions to provide event information.

type EventsSetter

type EventsSetter interface {
	Service
	// SetEvent sets an event.
	SetEvent(ctx context.Context, event *Event) error

	// SetEvents sets multiple events efficiently.
	SetEvents(ctx context.Context, events []*Event) error
}

EventsSetter defines functions to create and update events.

type Order

type Order uint8

Order is the order in which results should be fetched (N.B. fetched, not returned).

const (
	// OrderEarliest fetches earliest transactions first.
	OrderEarliest Order = iota
	// OrderLatest fetches latest transactions first.
	OrderLatest
)

type Service

type Service interface {
	// BeginTx begins a transaction.
	BeginTx(ctx context.Context) (context.Context, context.CancelFunc, error)

	// CommitTx commits a transaction.
	CommitTx(ctx context.Context) error

	// SetMetadata sets a metadata key to a JSON value.
	SetMetadata(ctx context.Context, key string, value []byte) error

	// Metadata obtains the JSON value from a metadata key.
	Metadata(ctx context.Context, key string) ([]byte, error)
}

Service defines a minimal exec database service.

type Transaction

type Transaction struct {
	AccessList           map[string][][]byte
	BlockHeight          uint32
	BlockHash            []byte
	ContractAddress      *[]byte
	Index                uint32
	Type                 uint64
	From                 []byte
	GasLimit             uint32
	GasPrice             *uint64
	GasUsed              uint32
	Hash                 []byte
	Input                []byte
	MaxFeePerGas         *uint64
	MaxPriorityFeePerGas *uint64
	Nonce                uint64
	R                    *big.Int
	S                    *big.Int
	Status               uint32
	To                   *[]byte
	V                    *big.Int
	Value                *big.Int
}

Transaction holds information about a transaction.

type TransactionBalanceChange

type TransactionBalanceChange struct {
	TransactionHash []byte
	BlockHeight     uint32
	Address         []byte
	Old             *big.Int
	New             *big.Int
}

TransactionBalanceChange holds information about a balance change as a result of a transaction.

type TransactionFilter

type TransactionFilter struct {
	// Limit is the maximum number of transactions to return.
	Limit uint32

	// Order is either OrderEarliest, in which case the earliest results
	// that match the filter are returned, or OrderLatest, in which case the
	// latest results that match the filter are returned.
	// The default is OrderEarliest.
	Order Order

	// From is the height of the earliest block from which to fetch transactions.
	// If nil then there is no earliest block.
	From *uint32

	// To is the height of the latest block from which to fetch transactions.
	// If nil then there is no latest block.
	To *uint32

	// Sender is the address of the sender field in the transaction.
	// If nil then no filter is applied
	Sender *[]byte

	// Recipient is the address of the recipient field in the transaction.
	// If nil then no filter is applied
	Recipient *[]byte
}

TransactionFilter defines a filter for fetching transactions. Filter elements are ANDed together. Results are always returned in ascending (block height, transaction index) order.

type TransactionStateDiff

type TransactionStateDiff struct {
	BalanceChanges []*TransactionBalanceChange
	StorageChanges []*TransactionStorageChange
}

TransactionStateDiff holds information about state differences as a result of a transaction.

type TransactionStateDiffsSetter

type TransactionStateDiffsSetter interface {
	Service
	// SetTransactionStateDiff sets a transaction's state differences.
	SetTransactionStateDiff(ctx context.Context, stateDiff *TransactionStateDiff) error

	// SetTransactionStateDiff sets multiple transactions' state differences efficiently.
	SetTransactionStateDiffs(ctx context.Context, stateDiffs []*TransactionStateDiff) error
}

TransactionStateDiffsSetter defines functions to create and update state differences.

type TransactionStorageChange

type TransactionStorageChange struct {
	TransactionHash []byte
	BlockHeight     uint32
	Address         []byte
	StorageAddress  []byte
	Value           []byte
}

TransactionStorageChange holds information about a storage change as a result of a transaction.

type TransactionsProvider

type TransactionsProvider interface {
	// Transactions returns transactions matching the supplied filter.
	Transactions(ctx context.Context, filter *TransactionFilter) ([]*Transaction, error)
}

TransactionsProvider defines functions to provide transaction information.

type TransactionsSetter

type TransactionsSetter interface {
	Service
	// SetTransaction sets a transaction.
	SetTransaction(ctx context.Context, transaction *Transaction) error

	// SetTransaction sets multiple transactions efficiently.
	SetTransactions(ctx context.Context, transactions []*Transaction) error
}

TransactionsSetter defines functions to create and update transactions.