Sample Hydra Project
This is a sample project generated by hydra-cli scaffold. Experiment by modifying schema.graphql and the mappings in the mappings folder.
Prerequisites
- Node v14x
- Docker
Bootstrap
npm ci
# Start postgres instance
docker-compose up db # add optional -d flag to detach from terminal
# Apply pending migrations
npm run db:migrate
# Apply migrations related to processor's state keeping tables
npm run processor:migrate
# Now you can start processing chain data
npm run processor:start
# The above command will block
# Open separate terminal and launch graphql server to query the processed data
npm run query-node:startIf you want start from scratch
# Delete database migrations and other generated files
rm -r db generated types
# Write down your schema.graphql
# Analyze schema.graphql and generate model/server files
npm run codegen
# Analyze database state and create migration to match generated models
npm run db:create-migration
# Review typegen section of manifest.yml
# Generate type definitions for substrate events and extrinsics
npm run typegenConfiguration
Project's configuration is driven by environment variables, defined in .env,
and manifest.yml. For more details see https://docs.subsquid.io.
Self-hosted indexer
It is recommeded to use already set up indexer if available, as new indexer typically requires some time to catch up with interesting events.
Have a look at ./indexer/docker-compose.yml for example of how you can set up a self-hosted version.