> ## Documentation Index
> Fetch the complete documentation index at: https://docs.cashmere.exchange/llms.txt
> Use this file to discover all available pages before exploring further.

# Cashmere Bridge

> Zero-slippage, native stablecoin transfers across chains.

import { Card, CardGroup, Callout, Steps, Table } from 'mintlify';

## Summary

Cashmere Bridge delivers deterministic, issuer-backed stablecoin transfers across EVM and non-EVM networks. The bridge uses message-based burn-and-mint flows (Circle CCTP, Tether USDT0) with Cashmere relayers orchestrating attestations, fee collection, and mint execution.

<Callout type="success">
  **Production** – Live on Ethereum, BNB Chain, Avalanche, Arbitrum, Optimism, Base, Unichain, Worldchain, Polygon, Linea, Sei, Sonic, HyperEVM, Aptos, Solana, and Sui. [Try the bridge →](https://app.cashmere.exchange)
</Callout>

## Core Advantages

<CardGroup cols={2}>
  <Card title="Zero Slippage" icon="calculator">
    Direct burn-and-mint transfers with exact output amounts; no pooled liquidity or wrapped assets.
  </Card>

  <Card title="Single Transaction UX" icon="bolt">
    Users sign once with relayer quote data embedded; Cashmere relayers complete destination minting.
  </Card>

  <Card title="MEV Resilience" icon="shield-halved">
    Guaranteed outputs remove sandwich and frontrunning vectors.
  </Card>

  <Card title="Programmable Fees" icon="clock">
    Real-time quotes exposed via API, signed, and verified on-chain for predictable fee management.
  </Card>
</CardGroup>

## Transfer Flow

<Steps>
  <Step title="Quote">
    Client requests a signature from the Gas API. Response includes fee, deadline, and signature (ECDSA or Ed25519).
  </Step>

  <Step title="Burn">
    User calls the Cashmere contract on the source chain, burning native stablecoins and emitting an event.
  </Step>

  <Step title="Attest">
    Relayer retrieves the issuer attestation, verifies signatures, and prepares destination calldata.
  </Step>

  <Step title="Mint">
    Relayer submits the mint transaction on the destination chain; recipient receives the exact amount minus relayer fee (if paid in USDC).
  </Step>
</Steps>

## Network Coverage

<Table>
  <TableHead>
    <TableRow>
      <TableHeader>Chain</TableHeader>
      <TableHeader>Gas Cost\*</TableHeader>
      <TableHeader>Finality Time</TableHeader>
      <TableHeader>Messaging Standard</TableHeader>
    </TableRow>
  </TableHead>

  <TableBody>
    <TableRow>
      <TableCell><strong>Ethereum L1</strong></TableCell>
      <TableCell>≈150k gas (\~\$0.35)</TableCell>
      <TableCell>≈20 seconds</TableCell>
      <TableCell>CCTP v1</TableCell>
    </TableRow>

    <TableRow>
      <TableCell><strong>Arbitrum / Base / Optimism</strong></TableCell>
      <TableCell>≈150k gas (\~\$0.003)</TableCell>
      <TableCell>≈8 seconds</TableCell>
      <TableCell>CCTP v2 (Fast/Normal thresholds)</TableCell>
    </TableRow>

    <TableRow>
      <TableCell><strong>Avalanche</strong></TableCell>
      <TableCell>≈\$0.004</TableCell>
      <TableCell>≈5 seconds</TableCell>
      <TableCell>CCTP v2</TableCell>
    </TableRow>

    <TableRow>
      <TableCell><strong>Solana</strong></TableCell>
      <TableCell>≈\$0.008</TableCell>
      <TableCell>≈3 seconds</TableCell>
      <TableCell>CCTP (Anchor)</TableCell>
    </TableRow>

    <TableRow>
      <TableCell><strong>Sui / Aptos</strong></TableCell>
      <TableCell>≈$0.018 / ≈$0.002</TableCell>
      <TableCell>≈3 seconds</TableCell>
      <TableCell>CCTP (Move)</TableCell>
    </TableRow>

    <TableRow>
      <TableCell><strong>Cosmos</strong></TableCell>
      <TableCell>≈\$0.002</TableCell>
      <TableCell>≈5 seconds</TableCell>
      <TableCell>CCTP</TableCell>
    </TableRow>
  </TableBody>
</Table>

<small>\* Indicative values; actual costs fluctuate with network conditions.</small>

## Integration Notes

* Use the [Gas API](/api-reference/quote) to retrieve signatures and fee amounts.
* Pass `minFinalityThreshold` values aligned with Circle guidance (1,000 Fast / 2,000 Normal).
* Monitor transfers via the [Monitoring API](/api-reference/analytics) using `/transactionsmainnet`.