sdkt-rpc 2.4.0

Soroban JSON-RPC client, endpoint configurations and network connectivity wrapper.
Documentation 
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use serde::{Deserialize, Serialize};

use crate::client::SorobanRpcClient;
use crate::error::RpcError;

#[derive(Debug, Serialize, Deserialize)]
pub struct ContractEvent {
    pub contract_id: String,
    pub ledger: Option<u32>,
    pub topics: Vec<String>,
    pub value: Option<String>,
}

#[derive(Serialize)]
#[serde(rename_all = "camelCase")]
struct EventFilter {
    #[serde(rename = "type")]
    filter_type: String,
    contract_ids: Vec<String>,
}

#[derive(Serialize)]
#[serde(rename_all = "camelCase")]
struct GetEventsRequest {
    start_ledger: u32,
    filters: Vec<EventFilter>,
}

#[derive(Deserialize)]
struct GetEventsResponse {
    events: Vec<RpcEvent>,
}

#[derive(Deserialize)]
#[allow(non_snake_case, dead_code)]
struct RpcEvent {
    ledger: String,
    contractId: String,
    topic: Vec<String>,
    value: GetEventsResponseValue,
}

#[derive(Deserialize)]
#[allow(non_snake_case, dead_code)]
struct GetEventsResponseValue {
    xdr: String,
}

pub async fn get_contract_events(
    client: &SorobanRpcClient,
    contract_id: &str,
) -> Result<Vec<ContractEvent>, RpcError> {
    // Determine a start ledger. For a robust tool, this should be configurable.
    // Here we query the latest ledger and look back up to 1000 ledgers.
    let latest_ledger_info =
        client
            .get_ledger()
            .await
            .unwrap_or_else(|_| crate::client::LedgerInfo {
                id: "".to_string(),
                protocol_version: 0,
                sequence: 1000,
            });

    let start_ledger = latest_ledger_info.sequence.saturating_sub(1000).max(1);

    let request_body = GetEventsRequest {
        start_ledger,
        filters: vec![EventFilter {
            filter_type: "contract".to_string(),
            contract_ids: vec![contract_id.to_string()],
        }],
    };

    let result: GetEventsResponse = client.request("getEvents", request_body).await?;

    let mut contract_events = Vec::new();

    for ev in result.events {
        contract_events.push(ContractEvent {
            contract_id: ev.contractId,
            ledger: ev.ledger.parse::<u32>().ok(),
            topics: ev.topic,
            value: Some(ev.value.xdr),
        });
    }

    Ok(contract_events)
}