heimdall

solana geyser plugin with redis, grpc, and postgres for real-time blockchain data streaming, analytics, and client updates

installation

building from source

prerequisites

• rust (latest stable version)
• docker and docker compose
• diesel cli for database migrations

build

cargo build --release

builds:

• linux: ./target/release/libgeyser.so
• macos: ./target/release/libgeyser.dylib

important: solana's plugin interface requires the build environment of the solana validator and this plugin to be identical.

this includes the solana version and rust compiler version. loading a plugin targeting wrong versions will result in memory corruption and crashes.

configuration

configuration is specified via json config file.

example config

{
  "libpath": "target/release/libgeyser.dylib",
  "redis": {
    "url": "redis://localhost:6379",
    "max_connections": 10,
    "connectiontimeoutms": 5000,
    "database": 0
  },
  "shutdowntimeoutms": 30000,
  "filters": [{
    "updateaccountstream": "heimdall:accounts",
    "slotstatusstream": "heimdall:slots", 
    "transaction_stream": "heimdall:transactions",
    "program_ignores": [
      "Sysvar1111111111111111111111111111111111111",
      "Vote111111111111111111111111111111111111111"
    ],
    "program_filters": [],
    "account_filters": [],
    "publishallaccounts": false,
    "includevotetransactions": true,
    "includefailedtransactions": true,
    "wrap_messages": false
  }],
  "prometheus": "127.0.0.1:9090"
}

reference

• libpath: path to geyser plugin
• redis: redis connection configuration

- url: redis connection url - max_connections: maximum number of connections in pool - connectiontimeoutms: connection timeout in milliseconds - database: redis database number

• shutdowntimeoutms: time the plugin is given to flush out all messages upon exit
• prometheus: optional address to provide metrics in prometheus format
• filters: array of filters with the following fields:

- updateaccountstream: redis stream name for account updates - slotstatusstream: redis stream name for slot status updates - transaction_stream: redis stream name for transaction updates - program_ignores: account addresses to ignore - program_filters: solana program ids to include - account_filters: solana accounts to include - publishallaccounts: publish all accounts on startup - includevotetransactions: include vote transactions - includefailedtransactions: include failed transactions - wrap_messages: wrap all messages in unified wrapper object

setup

infrastructure setup

• start docker services

docker compose up -d

this starts postgresql and redis containers with the following default configuration:

• postgresql: postgresql://heimdall:heimdall@localhost:5432/heimdall_db
• redis: redis://localhost:6379

• install diesel cli

cargo install diesel_cli --no-default-features --features postgres

• configure environment variables

export DATABASEURL="postgresql://heimdall:heimdall@localhost:5432/heimdalldb"

• run database migrations

pnpm run migrate

running services

start services in separate terminals:

• start api server

pnpm run start:api

• start stream server

pnpm run start:stream

• start database processor

pnpm run start:db-processor

• test stream client

pnpm run start:client

development

available scripts:

• pnpm run build - build in release mode
• pnpm run build:dev - build in debug mode
• pnpm run build:geyser - build geyser plugin specifically
• pnpm run test - run tests
• pnpm run check - check code without building
• pnpm run clean - clean build artifacts
• pnpm run migrate - run database migrations
• pnpm run migrate:reset - reset and rerun migrations

buffering

the redis publisher acts strictly non-blocking to allow the solana validator to sync without induced lag. this means incoming events from the solana validator get buffered and published asynchronously.

when the publishing buffer is exhausted, additional events will get dropped. this can happen when redis is slow or the connection fails. therefore it is crucial to choose sufficiently large buffer sizes.

buffer size can be controlled using redis configuration options and connection pool settings.

license

licensed under the apache license, version 2.0