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Building and Testing Canton Smart Contracts Locally
Building on Canton requires fast feedback loops. Testing locally before deploying to a testnet saves time and costs. This guide walks through a complete workflow: create a contract, build it, spin up a sandbox, and verify it works via the JSON API...
Continue reading → Tags : blockchain canton daml makefile
Fixing Canton Validator OAuth2 Authentication Errors
Onboarding a Canton validator to devnet, testnet, or mainnet can be challenging. One error that kept me stuck was integrating OAuth2 with the Canton node—specifically, the missing access_token error...
Continue reading → Tags : canton blockchain oauth
Handling Kafka Poison Pills in Reactive Spring Boot Applications
A single malformed Kafka message can silently halt your entire consumer group. If you've ever been paged at 2 AM because messages stopped processing and your consumer lag was climbing, there's a good chance you were dealing with a poison pill. Here's how to handle it in a reactive Spring Boot application...
Continue reading → Tags : kafka spring-boot reactive