schemos

Type-safe CosmWasm contract interactions, zero codegen.

schemos infers TypeScript types from JSON Schema (cargo schema output) at compile time and validates messages at runtime — no generated code, no client lock-in.

Install

pnpm add schemos

Quick Start

import { SigningCosmWasmClient } from '@cosmjs/cosmwasm-stargate'
import { createTypedContract } from 'schemos'
import { cw20 } from 'schemos/schemas'

const client = await SigningCosmWasmClient.connectWithSigner(rpcEndpoint, signer)
const token = createTypedContract(client, 'osmo1...', cw20)

// Execute — message names autocomplete, fields are type-checked
await token.execute(
  senderAddress,
  'transfer',
  { recipient: 'osmo1...', amount: '1000' },
  'auto',
)

// Query — return type inferred from response schema
const { balance } = await token.query('balance', { address: 'osmo1...' })
// balance: string

Typo? Compile error. Missing field? Compile error. Wrong type at runtime? Error thrown before gas is spent.

Entrypoints

Import	Description
schemos	createTypedContract, createMsgBuilder, createMsgValidator, Json, types
schemos/schemas	Bundled cw20, cw721 schemas
schemos/telescope	Adapter for telescope-generated SDKs (xplajs, osmojs, neutronj, ...)

Documentation

Full API reference, guides, and integration examples: https://schemos.vercel.app

License

MIT