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The TypeScript SDK includes an internal logger to help you monitor and debug your services.

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Log Levels

You can control the verbosity of logs using environment variables:
  • Set the log level:
    Use the RESTATE_LOGGING environment variable.
    Possible values: TRACE, DEBUG, INFO, WARN, ERROR.
  • Default log level:
    • INFO if NODE_ENV=production
    • DEBUG otherwise
  • Verbose journal logging:
    If you set RESTATE_LOGGING=TRACE, you can enable even more detailed journal logs with:
    RESTATE_JOURNAL_LOGGING=TRACE

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Console Logging

By default, using the Node.js console logger will print log statements repeatedly during replays.
To avoid duplicate logs during replays, use the Restate context logger. The context logger wraps the console and suppresses duplicate log statements during replays: 
import * as restate from "@restatedev/restate-sdk";

const service = restate.object({
  name: "Greeter",
  handlers: {
    greet: async (ctx: restate.ObjectContext, name: string) => {
      ctx.console.info("This will not be printed again during replays");
      ctx.console.debug("This will not be printed again during replays");
      // Any other console logging method can be used
    },
  },
});
  • The context logger uses the same log level filtering as described above.
  • Use ctx.console for all logging inside handlers to ensure clean, non-redundant logs.
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