Local Development

For making canister calls to local replica you need to have dfx running, and url of local replica (will be printed to console on dfx start). All of the agents from executing-canister-calls-example should be created with host=http://localhost:{your_dfx_local_replica_port}.

Troubleshooting

In case of not running local replica and not using it’s url as a host for agents you will see 404 requests to ledger canister with retries (only in local development). That is because dfinity HttpAgent tries to fetch root key with few retries and by default will try to fetch it from your application url as well as canister calls.