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Showing posts from July, 2019

Cosmos SDK vs Rell

When I first looked at Tenderming ~4 years ago (I seriously considered using Terndermint to implement consensus in Postchain), I was not particularly impressed by its programming model -- the example code in Go looked overly verbose.

I looked through Cosmos SDK docs today. Docs look really nice. And it's nice that the application can be built in a modular fashion, using pre-made Cosmos SDK modules. However, verbosity is still there...

Let's look at code needed to implement a single SetName operation in Cosmos. This operation simply checks that transaction's signer is the owner of the name, and then changes value associated with the name. This should be simple, right? It's probably the simplest thing you can do with blockchain. Let's first look at how one would implement it in Rell, e.g.:

operation set_name_value (name, value: text) { val entry = name_entry @ { name }; require(is_signer(entry.owner)); entry.value = value; }
Even if you don't know anyth…