likecoin-chain-tx-indexer

likecoin-chain-tx-indexer

This is a tool for indexing transaction from LikeCoin chain, replacing the slow /txs?... query endpoint provided by Tendermint and the lite client.

Build

make build

For Docker image, run make build-image to build and tag the Docker image.

Usage

You need a Postgres server as the storage database of indexed transactions.

In the following commands, you can specify the Postgres connection by providing postgres-db, postgres-host, postgres-port, postgres-user, postgres-pwd parameters.

You may refer to docker-compose.yml provided for Docker setup.

import

indexer import \
    --postgres-db "postgres" \
    --postgres-host "localhost" \
    --postgres-port "5432" \
    --postgres-user "postgres" \
    --postgres-pwd "password" \
    --liked-path ".liked"

Import and index the transactions from existing LikeCoin chain data folder.

Note that the node needs to be shutdown before importing, since LevelDB does not allow concurrent access from different processes.

poller

indexer serve poller \
    --postgres-db "postgres" \
    --postgres-host "localhost" \
    --postgres-port "5432" \
    --postgres-user "postgres" \
    --postgres-pwd "password" \
    --lcd-endpoint "http://localhost:1317"

Start poller, which will poll and index new transactions from the lite client into Postgres database.

HTTP server

indexer serve http \
    --postgres-db "postgres" \
    --postgres-host "localhost" \
    --postgres-port "5432" \
    --postgres-user "postgres" \
    --postgres-pwd "password" \
    --lcd-endpoint "http://localhost:1317" \
    --listen-addr ":8997"

Start serving the query endpoints.

For /txs endpoint, the query format is the same as the /txs?... endpoint of the lite client. Example: http://localhost:8997/txs?message.action=send&page=3005&limit=100

Unrecognized endpoints will be forwarded to the lite client.

testing

You may run a testing Postgres database:

docker compose run --rm -p 127.0.0.1:5433:5432 test-db

Then run make test.

Alternatively, provide an empty Postrgres database with environment variables:

DB_NAME=my_pg_db DB_HOST=somewhere DB_PORT=15432 DB_USER=my_pg_user DB_PASS=my_password go test ./...

API Example

Please refer to examples