Supported Chains

Oko supports Cosmos-SDK-based chains, EVM-based chains, and SVM-compatible chains (Solana, etc.). Chain metadata (IDs, names, currencies, RPCs, images, etc.) is sourced from the open-source Keplr Chain Registry. Contributions are welcome — you can add or update chains via pull requests.

• Registry: https://github.com/chainapsis/keplr-chain-registry

Ecosystems

• Cosmos: Chains identified like cosmoshub-4, osmosis-1, etc.
• EVM: Chains identified via CAIP-2 like eip155:1 (Ethereum), eip155:10 (Optimism), eip155:8453 (Base), etc.
• SVM: SVM-compatible chains identified like solana:mainnet, solana:devnet, etc.

Note: If a chain exists in the registry, Oko can discover and use it automatically. If your chain isn’t there yet, add it via PR (see below).

Add or Update a Chain

1. Check the registry for your chain

   • Cosmos directory: cosmos/
   • EVM directory: evm/
   • SVM directory: svm/

2. Prepare the chain JSON and assets per the registry’s requirements

   • Provide chain ID, RPC/REST endpoints, currencies, images, etc.

3. Open a PR to keplr-chain-registry

   • The Keplr team will review and merge.

Once merged, Oko SDK will pick it up automatically in the next fetch cycle (no app update needed).

SVM

SVM-compatible chains are identified using <chain>:<network> format:

Network	Chain ID	Description
Mainnet	solana:mainnet	Solana mainnet
Devnet	solana:devnet	Solana devnet

Pass the chain_id when initializing the SVM wallet:

import { OkoSvmWallet } from "@oko-wallet/oko-sdk-svm";

const initRes = OkoSvmWallet.init({
  api_key: "your-api-key",
  chain_id: "solana:mainnet",
});

Oko uses threshold EdDSA (FROST) for SVM chain signing, providing the same MPC security model as the Cosmos and EVM integrations.

Registry details

For full schema details, examples, and submission requirements, see the registry README.

React Native

The React Native SDK (@oko-wallet/oko-sdk-core-react-native) supports all the same chains listed above. The underlying chain support is identical to the web SDKs. See React Native Integration for mobile setup.

Custom chains

Adding chains dynamically via SDK methods such as wallet_switchEthereumChain or Keplr’s experimentalSuggestChain is not supported yet in Oko. This capability is planned for a future update.