Spy

Spy

A Spy, in the wormhole context, is a daemon that subscribes to the gossiped messages in the Guardian Network.

The messages available on over gossip are things like

• VAAs

• Observations

• Guardian Heartbeats

The source for the Spy is available on Github

The Spy has no persistence layer built in, so typically its paired with something like Redis or a SQL database to record relevant messages

Use

To start a Spy locally, run the following docker command.

Testnet

docker run --platform=linux/amd64 \
    -p 7073:7073 \
    --entrypoint /guardiand ghcr.io/wormhole-foundation/guardiand:latest \
    spy \
    --nodeKey /node.key \
    --spyRPC "[::]:7073" \
    --env testnet

Optionally, add the flags to skip any VAAs with invalid signatures

--ethRPC https://sepolia.drpc.org/
--ethContract 0x4a8bc80Ed5a4067f1CCf107057b8270E0cC11A78

Mainnet

Once running, a gRPC client (i.e. your program) can subscribe to a filtered stream of messages.

To generate a client for the gRPC service use this proto spec file.

If using JavaScript/TypeScript, the Spydk makes setting up a client easier.

See Also

The Pyth Beacon provides an alternate Spy implementation that is highly available for improved performance and reliability.

The relayer engine implements a client and persistence layer for messages received from a Spy subscription.