open-wallet-standard 1.4.1

Python native bindings for the Open Wallet Standard

open-wallet-standard

Local, policy-gated signing and wallet management for every chain.

Why OWS

• Local key custody. Private keys stay encrypted at rest and are decrypted only inside the OWS signing path after the relevant checks pass. Current implementations harden in-process memory handling and wipe key material after use.
• Every chain, one interface. EVM, Solana, XRPL, Sui, Bitcoin, Cosmos, Tron, TON, Spark, Filecoin, Nano, NEAR — all first-class. CAIP-2/CAIP-10 addressing abstracts away chain-specific details.
• Policy before signing. A pre-signing policy engine gates agent (API key) operations before decryption — chain allowlists, expiry, and optional custom executables.
• Built for agents. Native SDK and CLI today. A wallet created by one tool works in every other.

Install

pip install open-wallet-standard

The package is fully self-contained — it embeds the Rust core via native FFI. No additional dependencies required.

Quick Start

from ows import create_wallet, sign_message

wallet = create_wallet("agent-treasury")
# => accounts for EVM, Solana, Bitcoin, Cosmos, Tron, TON, Spark, Filecoin, Sui, XRPL, Nano, and NEAR

sig = sign_message("agent-treasury", "evm", "hello")
print(sig["signature"])

API Reference

Function	Description
create_wallet(name, passphrase?, words?, vault_path?)	Create a new wallet with addresses for the current auto-derived chain set
import_wallet_mnemonic(name, mnemonic, passphrase?, index?, vault_path?)	Import a wallet from a BIP-39 mnemonic
import_wallet_private_key(name, private_key_hex, chain?, passphrase?, vault_path?, secp256k1_key?, ed25519_key?)	Import a wallet from a private key
list_wallets(vault_path?)	List all wallets in the vault
get_wallet(name_or_id, vault_path?)	Get details of a specific wallet
delete_wallet(name_or_id, vault_path?)	Delete a wallet
export_wallet(name_or_id, passphrase?, vault_path?)	Export a wallet's mnemonic or keys
rename_wallet(name_or_id, new_name, vault_path?)	Rename a wallet
sign_message(wallet, chain, message, passphrase?, encoding?, index?, vault_path?)	Sign a message with chain-specific formatting
sign_hash(wallet, chain, hash_hex, passphrase?, index?, vault_path?)	Sign a raw 32-byte hash on a secp256k1-backed chain
sign_authorization(wallet, chain, address, nonce, passphrase?, index?, vault_path?)	Sign an EIP-7702 authorization tuple
sign_typed_data(wallet, chain, typed_data_json, passphrase?, index?, vault_path?)	Sign EIP-712 typed data (EVM only)
sign_transaction(wallet, chain, tx_hex, passphrase?, index?, vault_path?)	Sign a raw transaction
sign_and_send(wallet, chain, tx_hex, passphrase?, index?, rpc_url?, vault_path?)	Sign and broadcast a transaction
generate_mnemonic(words?)	Generate a BIP-39 mnemonic phrase
derive_address(mnemonic, chain, index?)	Derive an address from a mnemonic
create_policy(policy_json, vault_path?)	Register a policy from a JSON string
list_policies(vault_path?)	List all registered policies
get_policy(id, vault_path?)	Get a single policy by ID
delete_policy(id, vault_path?)	Delete a policy by ID
create_api_key(name, wallet_ids, policy_ids, passphrase, expires_at?, vault_path?)	Create an API key for agent access
list_api_keys(vault_path?)	List all API keys (tokens never returned)
revoke_api_key(id, vault_path?)	Revoke an API key

Supported Chains

Chain	Curve	Address Format	Derivation Path
EVM (Ethereum, Polygon, etc.)	secp256k1	EIP-55 checksummed	m/44'/60'/0'/0/0
Solana	Ed25519	base58	m/44'/501'/0'/0'
Bitcoin	secp256k1	BIP-84 bech32	m/84'/0'/0'/0/0
Cosmos	secp256k1	bech32	m/44'/118'/0'/0/0
Tron	secp256k1	base58check	m/44'/195'/0'/0/0
TON	Ed25519	raw/bounceable	m/44'/607'/0'
Sui	Ed25519	0x + BLAKE2b-256 hex	m/44'/784'/0'/0'/0'
XRPL	secp256k1	Base58Check (r...)	m/44'/144'/0'/0/0
Spark (Bitcoin L2)	secp256k1	spark: prefixed	m/84'/0'/0'/0/0
Filecoin	secp256k1	f1 base32	m/44'/461'/0'/0/0
NEAR	Ed25519	implicit hex (64 chars)	m/44'/397'/0'

Architecture

Agent / CLI / App
       │
       │  OWS Interface (SDK / CLI)
       ▼
┌─────────────────────┐
│    Access Layer      │     1. Caller invokes sign()
│  ┌────────────────┐  │     2. Policy engine evaluates for API tokens
│  │ Policy Engine   │  │     3. Key decrypted in hardened memory
│  │ (pre-signing)   │  │     4. Transaction signed
│  └───────┬────────┘  │     5. Key wiped from memory
│  ┌───────▼────────┐  │     6. Signature returned
│  │  Signing Core   │  │
│  │   (in-process)  │  │     The OWS API never returns
│  └───────┬────────┘  │     raw private keys.
│  ┌───────▼────────┐  │
│  │  Wallet Vault   │  │
│  │ ~/.ows/wallets/ │  │
│  └────────────────┘  │
└─────────────────────┘

Documentation

The full spec and docs are available at openwallet.sh and in the GitHub repo.

License

MIT