watcher-ts

Watchers make managing data in Dapp development as frictionless as possible. They do this by querying, transforming, and caching Ethereum state data cheaper and faster compared to existing solutions. This data also comes with evidence for generating cryptographic proofs to provide verification that the data is authentic. Public watchers are found in the packages directory.

Go here for a quick start demo of setting up the stack and deploying/using the erc20 watcher via the Laconic Stack Orchestrator.

Prerequisites

User Mode

• laconic-so Install

The Laconic Stack Orchestrator provides all the tools to quickly get started with watchers.

Developer Mode

• yarn Install
• postgres Install

You'll need the above if you plan on digging into this repo, writing your own watchers, or experimenting with watchers not currently supported by Stack Orchestrator. See CONTRIBUTING.md for more information.

Services

The default configuration files used by watchers assume the following services are setup and running on localhost:

• cerc-io/go-ethereum on port 8545
• cerc-io/ipld-eth-server with native GQL API enabled, on port 8082
• cerc-io/ipld-eth-db to populate the postgres database for ipld-eth-server

These services are dockerized by the Laconic Stack Orchestrator (laconic-so). Use it unless you plan on digging into those codebases. For more information on setting up these services up by hand, see here

Setup

From the root of this repository, run:

yarn && yarn build

to download dependencies and build all the watchers.

Orient yourself with the available CLI commands here and in some cases, watchers have in-depth demos (e.g. mobymask)

Tests

• graph-node

Further Reading

• Watchers Blog Post