# EIP-7702: One-Click Cross-Chain Staking

### What is EIP-7702?

EIP-7702 (Set EOA account code for one transaction) allows regular wallets (EOAs) to temporarily act like smart contracts for a single transaction. This means users can execute complex operations that normally require multiple steps—all within one transaction while keeping their familiar wallet experience.

### How Escher Uses EIP-7702

Escher leverages EIP-7702 to enable **one-click cross-chain liquid staking**:

#### Traditional Flow (Without EIP-7702)

1. Approve tokens for spending
2. Swap tokens
3. Bridge tokens to staking chain
4. Stake tokens on destination chain

**Result**: 4+ transactions, high gas costs, complex UX

#### Escher's EIP-7702 Flow

1. User clicks "Stake" on any supported token
2. Single EIP-7702 transaction handles everything:
   * Token approval and transfer
   * swap token
   * Union bridge interaction
   * Cross-chain staking
   * LST minting and return

**Result**: 1 transaction, lower gas costs, simple UX

### Key Benefits

* **One-Click Staking**: Stake any token from any supported chain instantly
* **Gas Efficient**: Single transaction instead of 5+ separate transactions
* **Cross-Chain Seamless**: Use Union bridge automatically in the background
* **LSTs to Destination**: Receive liquid staking tokens back on your preferred chain
* **No Technical Knowledge**: Users just click stake—everything else is automated
* **Use any token**: Can use any token to stake

### Example Use Cases

**Cross Chain**: Stake ETH on Ethereum → Get eBaby on Ethereum

**Any Token**: Stake any supported token → Auto-convert → Stake on destination → Get LSTs back

This makes liquid staking as simple as a single click while maintaining all the power of cross-chain operations through Union's infrastructure.


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