Context:

• Iroha has a WASM-based executor, which could declare its data model via the same schema.json format as used for the main Iroha data model. It is available via client.find.executorDataModel().
• Iroha JS "hardcodes" the main Iroha data model as static codecs
• Iroha JS doesn't provide tools to create a dynamic codec from the schema

In theory, the users of the SDK might want to use the schema returned from the FindExecutorDataModel query to encode something. For this, the SDK could provide some tooling like this:

import type { SchemaDefinition } from '@iroha/core/data-model/schema' 
// new API
import { DynamicNamespace } from '@iroha/core/codec'
const SCHEMA = {
 Foo: {
 Struct: [{ name: 'bar', type: 'String' }]
 }
} satisfies SchemaDefinition
const ns = new DynamicNamespace(SCHEMA)
const fooEncoded = ns.get('Foo')!.encode({ bar: 'hey' })