gleeth/events

Query and decode contract events in a single call.

Combines methods.get_logs with ABI event decoding so you don’t have to manually match topic hashes and decode parameters.

Examples

let assert Ok(abi) = json.parse_abi(erc20_abi_json)
let assert Ok(decoded) = events.get_events(
  provider,
  "0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48",
  abi,
  "0x100000",
  "latest",
)
// decoded: List(EventResult) - each with event name and typed params

Types

EventResult

</>

Result of decoding a single event log.

pub type EventResult {
  Decoded(event: events.DecodedLog, log: types.Log)
  Unknown(log: types.Log)
}

Constructors

```
Decoded(event: events.DecodedLog, log: types.Log)
```
Successfully decoded event with name and typed parameters.
```
Unknown(log: types.Log)
```
Log could not be matched to any event in the ABI.

Values

compute_event_topic

</>

pub fn compute_event_topic(
  abi: List(json.AbiEntry),
  event_name: String,
) -> String

decode_logs

</>

pub fn decode_logs(
  logs: List(types.Log),
  abi: List(json.AbiEntry),
) -> List(EventResult)

Decode a list of raw logs against an ABI. Useful when you already have logs from another source (e.g. a transaction receipt).

Examples

let results = events.decode_logs(receipt.logs, abi)

get_events

</>

pub fn get_events(
  provider: provider.Provider,
  address: String,
  abi: List(json.AbiEntry),
  from_block: String,
  to_block: String,
) -> Result(List(EventResult), types.GleethError)

Query logs for a contract and decode them against the provided ABI. Logs that match an event in the ABI are decoded; unmatched logs are returned as Unknown so no data is lost.

Examples

let assert Ok(events) = events.get_events(
  provider, "0xA0b8...", abi, "0x100000", "latest",
)

get_events_by_name

</>

pub fn get_events_by_name(
  provider: provider.Provider,
  address: String,
  abi: List(json.AbiEntry),
  event_name: String,
  from_block: String,
  to_block: String,
) -> Result(List(EventResult), types.GleethError)

Query logs for a specific event name. Filters by the event’s topic0 hash, so only matching logs are returned from the RPC.

Examples

let assert Ok(transfers) = events.get_events_by_name(
  provider, "0xA0b8...", abi, "Transfer", "0x100000", "latest",
)