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Interact with REST

All gRPC services on the Cosmos SDK and Osmosis are made available for more convenient REST-based queries through gRPC-gateway. The format of the URL path is based on the Protobuf service method's full-qualified name, but may contain small customizations so that final URLs look more idiomatic. For example, the REST endpoint for the cosmos.bank.v1beta1.Query/AllBalances method is GET /cosmos/bank/v1beta1/balances/{address}. Request arguments are passed as query parameters.

As a concrete example, the curl command to make balances request is:

curl \
    -X GET \
    -H "Content-Type: application/json" \
    https://lcd.osmosis.zone/cosmos/bank/v1beta1/balances/$MY_ADDRESS

The list of all available REST endpoints is available as a Swagger specification file, it can be viewed at localhost:1317/swagger. Make sure that the api.swagger field is set to true in your app.toml file.

Query for historical state using REST​

Querying for historical state is done using the HTTP header x-cosmos-block-height. For example, a curl command would look like:

curl \
    -X GET \
    -H "Content-Type: application/json" \
    -H "x-cosmos-block-height: 279256"
    http://localhost:1317/cosmos/bank/v1beta1/balances/$MY_VALIDATOR

Assuming the state at that block has not yet been pruned by the node, this query should return a non-empty response.

Cross-Origin Resource Sharing (CORS)​

CORS policies are not enabled by default to help with security.

Setting up a public rest server​

If you would like to use the rest-server in a public environment we recommend you provide a reverse proxy. We can share our Terraform infrastructurefor setting up rest servers in DigitalOcean. We will write a guide soon and publish a repo soon. In the meantime feel free to reachout in Discord. s

For testing and development purposes there is an enabled-unsafe-cors field inside app.toml.

Signing transactions​

Sending transactions using gRPC and REST requires some additional steps: generating the transaction, signing it, and finally broadcasting it. Read about generating and signing transactions.