tx-indexer is a tool designed to index TM2 chain data and serve it over RPC, facilitating efficient data retrieval and management in Tendermint2 networks.
- JSON-RPC 2.0 Specification Server: Utilizes the JSON-RPC 2.0 standard for request / response handling.
- HTTP and WS Support: Handles both HTTP
POSTrequests and WebSocket connections. - 2-Way WS Communication: Subscribe and receive data updates asynchronously over WebSocket connections.
- Concurrent Chain Indexing: Utilizes asynchronous workers for fast and efficient indexing. Data is available for serving as soon as it is fetched from the remote chain.
- Embedded Database: Features PebbleDB for quick on-disk data access and migration.
This section guides you through setting up and running the tx-indexer.
- Clone the Repository
git clone https://github.com/gnolang/tx-indexer.git- Build the binary
cd tx-indexer make build- Run the indexer
./build/tx-indexer start --remote https://rpc.test7.testnets.gno.land --db-path indexer-dbor:
go run cmd/main.go cmd/start.go cmd/waiter.go start --remote https://rpc.test7.testnets.gno.land --db-path indexer-dbThe --remote flag specifies the JSON-RPC URL of the chain the indexer should index, and the --db-path specifies the on-disk location for the indexed data.
Note: the websocket endpoint exposed is always: ws://<listen-address>/ws, where <listen-address> is set via the --listen-address flag when starting the indexer (default: 0.0.0.0:8546).
For a full list of available features and flags, execute the --help command:
> ./build/tx-indexer start --help DESCRIPTION Starts the indexer service USAGE start [flags] Starts the indexer service, which includes the fetcher and JSON-RPC server FLAGS -db-path indexer-db the absolute path for the indexer DB (embedded) -disable-introspection=false disable GraphQL introspection queries if needed. This will cause malfunctions when using the GraphQL playground -http-rate-limit 0 the maximum HTTP requests allowed per minute per IP, unlimited by default -listen-address 0.0.0.0:8546 the IP:PORT URL for the indexer JSON-RPC server -log-level info the log level for the CLI output -max-chunk-size 100 the range for fetching blockchain data by a single worker -max-slots 100 the amount of slots (workers) the fetcher employs -remote http://127.0.0.1:26657 the JSON-RPC URL of the Gno chainThe indexer provides a GraphQL endpoint for querying blockchain data (transactions, blocks) and subscribing to real-time events:
Endpoint:
http://<listen-address>/graphql/query Playground (Interactive UI):
http://<listen-address>/graphql The playground includes built-in documentation for available queries, fields, and filters.
Note: Introspection is enabled by default --disable-introspection=false; disable it only if security is a priority (Playground won’t work).
{ getTransactions(where: {messages: {value: {MsgAddPackage: {}}}}) { index hash block_height gas_used messages { route typeUrl value { __typename ... on MsgAddPackage { creator package { name path } } } } } }subscription { getBlocks(where: {}) { height version chain_id time proposer_address_raw } }Please take note that the indexer JSON-RPC server adheres to the JSON-RPC 2.0 standard for request and response processing.
Fetches a specific block from the chain.
- Params: Decimal block number (
int64) as a string. - Response: Base64 encoded, Amino encoded binary of the block.
Example request:
{ "id": 1, "jsonrpc": "2.0", "method": "getBlock", "params": [ "10" ] }Example response:
{ "result": "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", "jsonrpc": "2.0", "id": 1 }If no block is found (not yet indexed), null as the response result is returned:
{ "result": null, "jsonrpc": "2.0", "id": 1 }Fetches the specified transaction result from storage.
- Params: Base64 hash of the transaction
- Response: Base64 encoded, Amino encoded binary of the transaction result
Example request:
{ "id": 1, "jsonrpc": "2.0", "method": "getTxResult", "params": [ "AP9YX+QXrIByqonIqStod8G9EI5AMiUZhsXk58wr0ws=" ] }Example response:
{ "result": "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", "jsonrpc": "2.0", "id": 1 }If no transaction result is found (not yet indexed, or transaction not committed yet), null as the response result is returned:
{ "result": null, "jsonrpc": "2.0", "id": 1 }Creates a filter for new block events, to notify when a new block arrives. To check if the state has changed, call the getFilterChanges endpoint.
- Params: no params
- Response: the filter ID (
string)
Example request:
{ "id": 1, "jsonrpc": "2.0", "method": "newBlockFilter", "params": [] }Example response:
{ "result": "c77000bb-700c-41b9-830c-e8b35bdef246", "jsonrpc": "2.0", "id": 1 }Polling method for a filter, which returns an array of events that have occurred since the last poll. Filters that are inactive (not polled) for 5min are automatically cleaned up.
- Params: the filter ID (
string) - Response: array containing filter data.
- In case of a block filter, the response is an array of base64 encoded, Amino binary block headers
Example request:
{ "id": 1, "jsonrpc": "2.0", "method": "getFilterChanges", "params": [ "c77000bb-700c-41b9-830c-e8b35bdef246" ] }Example response:
{ "result": [ "Cgt2MS4wLjAtcmMuMBIFdGVzdDMYstoZIgsI9teBrQYQ4f+cJzDgH0JICiCOeRC+O7eSKWElYfr3roazF9A23Wvk2AvSWfhU1If41BIkCAISIOmJytoey1P0ZF1/oZUs7Pa7ytV5WJrh41s2PxvWHc4mSiDU0XJ+JFOgK7vm2fVLL29BtwKOGfkv+JxHB1sdgeoSwVog92nrytGOQMQp15Sdl3MG3GaeGdyRMAnaA1rGBVil/QhiIPdp68rRjkDEKdeUnZdzBtxmnhnckTAJ2gNaxgVYpf0IaiC4qGdcWYZSTGBBIl/XuiBtgs1cOjdQQ/BC/N12jhWS7HIggbuwi7zCzwlQP7PCb9EXN2EG7738FHbXIgYPWxBlakiCAShnMXd5cmU0Z3I3bjgyZXpmcGRoZzNueHlwank5Y2FnOXFwa3U1eDZt", "Cgt2MS4wLjAtcmMuMBIFdGVzdDMYtNoZIgsIs9iBrQYQ7cjnLDDgH0JICiC9pNnvamowMWsgZczqQ6V5J0YoHNYZWCwFvSFV88+j3xIkCAISIATruI4Rl6mfRoS6GzjaE0aCpWZaYNssV1E+8xRlrDStSiAwCZMWNPsjNM/2fOv37CTjuTPqKW71C5xuBnhEVO5a5Fog92nrytGOQMQp15Sdl3MG3GaeGdyRMAnaA1rGBVil/QhiIPdp68rRjkDEKdeUnZdzBtxmnhnckTAJ2gNaxgVYpf0IaiC4qGdcWYZSTGBBIl/XuiBtgs1cOjdQQ/BC/N12jhWS7HIggbuwi7zCzwlQP7PCb9EXN2EG7738FHbXIgYPWxBlakiCAShnMXd5cmU0Z3I3bjgyZXpmcGRoZzNueHlwank5Y2FnOXFwa3U1eDZt" ], "jsonrpc": "2.0", "id": 1 }Uninstalls a filter with the given filter ID.
- Params: the filter ID (
string) - Response:
trueif the filter was successfully uninstalled, otherwisefalse(boolean)
Example request:
{ "id": 1, "jsonrpc": "2.0", "method": "uninstallFilter", "params": [ "c77000bb-700c-41b9-830c-e8b35bdef246" ] }Example response:
{ "result": true, "jsonrpc": "2.0", "id": 1 }Starts a subscription to a specific event. Only available over WS connections.
Available events:
-
newHeads- fires a notification each time a new header is appended to the chain -
Params: the event type [
newHeads] (string) -
Response: the subscription ID (
string) (initial response), then event data (see example below)- For
newHeadsevents, the result is a base64 encoded, Amino binary block header
- For
Since this endpoint is only supported over WS connections, it will write data directly to the client.
Example request (over WS):
{ "id": 1, "jsonrpc": "2.0", "method": "subscribe", "params": [ "newHeads" ] }Example initial response (over WS):
{ "result": "b8934e81-5758-4249-8953-da90aa777ef9", "jsonrpc": "2.0", "id": 1 }Example response when a newHeads event happens (over WS):
{ "params": { "result": "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", "subscription": "b8934e81-5758-4249-8953-da90aa777ef9" }, "jsonrpc": "2.0", "method": "subscription" }Cancels an existing subscription so that no further events are sent. Only available over WS connections.
- Params: the subscription ID (
string) - Response: A boolean value indicating if the subscription was canceled successfully (
boolean)
Example request (over WS):
{ "id": 1, "jsonrpc": "2.0", "method": "unsubscribe", "params": [ "b8934e81-5758-4249-8953-da90aa777ef9" ] }Example response (over WS):
{ "result": true, "jsonrpc": "2.0", "id": 1 }