Welcome

Seismic is an EVM blockchain with native on-chain privacy. Write Solidity. Deploy with Foundry. Interact with Viem. The only difference: your users' data stays private.

One letter changes everything

The difference between a public ERC20 and a private SRC20 is one letter:

// Standard ERC20 — balances visible to everyone
mapping(address => uint256) public balanceOf;

function transfer(address to, uint256 amount) public {
    balanceOf[msg.sender] -= amount;
    balanceOf[to] += amount;
}

// Seismic SRC20 — balances shielded by default
mapping(address => suint256) balanceOf;    // uint256 → suint256

function transfer(address to, suint256 amount) public {  // uint256 → suint256
    balanceOf[msg.sender] -= amount;
    balanceOf[to] += amount;
}

The s prefix tells the Seismic compiler to shield the underlying value. Observers see 0x00...0 instead of actual balances and amounts. Everything else — the Solidity syntax, the EVM execution model, the deployment flow — stays exactly the same.

What you can build

• Shielded tokens — ERC20s where balances and transfer amounts are hidden from observers

• Confidential DeFi — AMMs and lending protocols where positions, prices, and liquidation thresholds are shielded

• Compliant finance — Privacy with built-in access control so regulators can verify without exposing user data

3-minute quickstart

Already have Rust and the ?

You just ran shielded contract tests locally. See the for next steps.

Find what you need

Pre-requisite knowledge

Our documentation assumes some familiarity with blockchain app development. Before getting started, it'll help if you're comfortable with:

If you're new to blockchain app development or need a refresher, we recommend starting out with the tutorial.

Work with us

If you might benefit from direct support from the team, please don't hesitate to reach out to [email protected]. We pride ourselves in fast response time.

You can also check out our for the latest updates, or join our community.