Struct LogReader 

pub struct LogReader<'a> { /* private fields */ }

Reader for log data from Arrow batches.

Provides efficient access to log fields without copying data from the underlying Arrow columnar format. Each reader is bound to a specific row in the batch.

Implementations

impl<'a> LogReader<'a>

pub fn new(batch: &'a RecordBatch, row_idx: usize) -> Result<Self>

Safely create a new reader for the given batch at row index and check that row_idx is within the bounds of the batch.

pub fn iter(batch: &'a RecordBatch) -> LogIterator<'a>

Create an iterator over all rows in the batch.

pub fn removed(&self) -> Result<Option<bool>, ReadError>

The boolean value indicating if the event was removed from the blockchain due to a chain reorganization. True if the log was removed. False if it is a valid log.

pub fn log_index(&self) -> Result<LogIndex, ReadError>

The integer identifying the index of the event within the block’s list of events.

pub fn transaction_index(&self) -> Result<TransactionIndex, ReadError>

The integer index of the transaction within the block’s list of transactions.

pub fn transaction_hash(&self) -> Result<Hash, ReadError>

The hash of the transaction that triggered the event.

pub fn block_hash(&self) -> Result<Hash, ReadError>

The hash of the block in which the event was included.

pub fn block_number(&self) -> Result<BlockNumber, ReadError>

The block number in which the event was included.

pub fn address(&self) -> Result<Address, ReadError>

The contract address from which the event originated.

pub fn topic0(&self) -> Result<Option<FixedSizeData<32>>, ReadError>

The first topic of the event (topic0).

pub fn topic1(&self) -> Result<Option<FixedSizeData<32>>, ReadError>

The second topic of the event (topic1).

pub fn topic2(&self) -> Result<Option<FixedSizeData<32>>, ReadError>

The third topic of the event (topic2).

pub fn topic3(&self) -> Result<Option<FixedSizeData<32>>, ReadError>

The fourth topic of the event (topic3).

pub fn data(&self) -> Result<Data, ReadError>

The non-indexed data that was emitted along with the event.

Trait Implementations

impl<'a> From<ArrowRowReader<'a>> for LogReader<'a>

fn from(inner: ArrowRowReader<'a>) -> Self

Converts to this type from the input type.

impl TryFrom<LogReader<'_>> for Log

type Error = Error

The type returned in the event of a conversion error.

fn try_from(reader: LogReader<'_>) -> Result<Self, Self::Error>

Performs the conversion.