Index any EVM chain and query in SQL
Getting Started | Examples | Design Goals & Features | RoadMap | Contributing
📊 Here is what indexing and tracking owers of your favorite NFTs looks like:
use chaindexing::states::{ContractState, Filters, Updates};
use chaindexing::{EventContext, EventHandler};
use crate::states::Nft;
pub struct TransferHandler;
#[chaindexing::augmenting_std::async_trait]
impl EventHandler for TransferHandler {
fn abi(&self) -> &'static str {
"event Transfer(address indexed from, address indexed to, uint256 indexed tokenId)"
}
async fn handle_event<'a, 'b>(&self, context: EventContext<'a, 'b>) {
let event_params = context.get_event_params();
let _from = event_params.get_address_string("from");
let to = event_params.get_address_string("to");
let token_id = event_params.get_u32("tokenId");
if let Some(existing_nft) =
Nft::read_one(&Filters::new("token_id", token_id), &context).await
{
let updates = Updates::new("owner_address", &to);
existing_nft.update(&updates, &context).await;
} else {
let new_nft = Nft {
token_id,
owner_address: to,
};
new_nft.create(&context).await;
}
}
}
A quick and effective way to get started is by exploring the comprehensive examples provided here: https://github.com/chaindexing/chaindexing-examples/tree/main/rust.
- 💸 Free forever
- ⚡ Real-time use-cases
- 🌐 Multi-chain
- 🧂 Granular, 🧩 Modular & 📈 Scalable
- 🌍 Environment-agnostic to allow inspecting 🔍 & replicating indexes anywhere!
- 🔓 ORM-agnostic, use any ORM to access indexed data
- 📤 Easy export to any data lake: S3, Snowflake, etc.
- 🚫 No complex YAML/JSON/CLI config
- 💪 Index contracts discovered at runtime
- ✨ Handles re-org with no UX impact
- 🔥 Side effect handling for notifications & bridging use cases
- 💸 Optimize RPC cost by indexing when certain activities happen in your DApp
- 💎 Language-agnostic, so no macros!
- ⬜ Expose
is_at_block_tail
flag to improve op heuristics for applications - ⬜ Support SQLite Database (Currently supports only Postgres)
- ⬜ Support indexing raw transactions & call traces.
- ⬜ Improved error handling/messages/reporting (Please feel free to open an issue when an opaque runtime error is encountered)
- ⬜ Support TLS connections
- ⬜ Minimal UI for inspecting events and indexed states
All contributions are welcome. Before working on a PR, please consider opening an issue detailing the feature/bug. Equally, when submitting a PR, please ensure that all checks pass to facilitate a smooth review process.