What it is
Teams running a treasury on-chain were juggling wallets across chains, signing one transaction at a time, and doing it in public, where anyone could watch their balances and payments.
Sourdough gives a team one place to hold stablecoins, set approval rules and pay across chains, while keeping balances and payment flows private.
What it does
- Team multisig with approval thresholds and permissions that apply across every chain
- Single-signature transfers across Cosmos, EVM chains and Solana
- Private balances and payment flows on EVM through Railgun
- Keys protected by MPC and secure enclaves; fully non-custodial, with key export for independent recovery
- Payroll, expenses and incoming payments for teams
How it’s built
A Cosmos SDK chain with CosmWasm contracts holds team policy and multisig logic. An MPC relayer signs transactions on EVM chains and Solana without any single private key being exposed.
The hard part
Making three very different chain families feel like one product. Cosmos, EVM and Solana disagree on signing formats, fees, confirmation times and even what a transaction is, and the team policy layer has to stay consistent across all of them.