Swap

Trade between B20 tokens with full privacy. Same liquidity, same rates, zero exposure.

How Private Swaps Work

RAIL20 swaps combine shielded transactions with existing DEX liquidity on Base:

1. Shielded → public — unshield directly to DEX router as recipient.
2. Public → shielded — DEX output immediately shielded back.

Both steps atomic in a single tx.

Fee Structure

Swap Example

// Swap 500 shielded B20 for shielded USDC
const swapProof = await generateSwapProof({
  inputNote: aliceNote,           // 500 B20 (shielded)
  swapPath: [b20Token, usdcToken],
  minOutput: parseUSDC("498"),    // slippage
  dexRouter: uniswapRouter,
  merkleRoot: await getMerkleRoot(),
});
await broadcaster.submitSwap(swapProof);

Supported DEXs

• Uniswap V3 — concentrated liquidity
• Uniswap V2 — constant product
• Meteora — dynamic pools on Base

Slippage & MEV Protection