Deploying to a generic DAML ledger

DAML ledgers expose a unified administration API. This means that deploying to a DAML ledger is no different from deploying to your local sandbox.

To deploy to a DAML ledger, run the following command from within your DAML project:

$ daml deploy --host=<HOST> --port=<PORT> --access-token-file=<TOKEN-FILE>

where <HOST> and <PORT> is the hostname and port your ledger is listening on, which defaults to port 6564. The <TOKEN-FILE> is needed if your sandbox runs with authorization and needs to contain a JWT token with an admin claim. If your sandbox is not setup to use any authentication it can be omitted.

Instead of passing --host and --port flags to the command above, you can add the following section to the project’s daml.yaml file:

ledger:
    host: <HOSTNAME>
    port: <PORT>

The daml deploy command will

  1. upload the project’s compiled DAR file to the ledger. This will make the DAML templates defined in the current project available to the API users of the sandbox.
  2. allocate the parties specified in the project’s daml.yaml on the ledger if they are missing.

For more further interactions with the ledger, use the daml ledger command. Try running daml ledger --help to get a list of available ledger commands:

$ daml ledger --help
Usage: daml ledger COMMAND
  Interact with a remote DAML ledger. You can specify the ledger in daml.yaml
  with the ledger.host and ledger.port options, or you can pass the --host and
  --port flags to each command below. If the ledger is authenticated, you should
  pass the name of the file containing the token using the --access-token-file
  flag.

Available options:
  -h,--help                Show this help text

Available commands:
  list-parties             List parties known to ledger
  allocate-parties         Allocate parties on ledger
  upload-dar               Upload DAR file to ledger
  navigator                Launch Navigator on ledger

Connecting via TLS

To connect to the ledger via TLS, you can pass --tls to the various commands. If your ledger supports or requires mutual authentication you can pass your client key and certificate chain files via --pem client_key.pem --crt client.crt. Finally, you can use a custom certificate authority for validating the server certificate by passing --cacrt server.crt. If --pem, --crt or --cacrt are specified TLS is enabled automatically so --tls is redundant.

Configuring Request Timeouts

You can configure the timeout used on API requests by passing --timeout=N to the various daml ledger commands and daml deploy which will set the timeout to N seconds. Note that this is a per-request timeout not a timeout for the whole command. That matters for commands like daml deploy that consist of multiple requests.