Single-Transaction Swaps
Gasyard enables single-transaction cross-chain swaps. Users send one token, receive another token on a different chain—instantly.Swap Scenarios
- Token A → Token B
- Native Token
- Direct Bridge
- Partner Mode
Cross-chain swap with different input/output tokensUser wants to pay in Token A and receive Token B on another chain.Flow: ETH (Ethereum) → USDC → Bridge → USDC → ARB (Arbitrum)Example: ETH on Ethereum → ARB on Arbitrum
Complete Flow Example
Scenario: User has 1 ETH on Ethereum, wants ARB on Arbitrum1
User Initiates
User sends 1 ETH to GatewayRouter on Ethereum
2
Source Swap
Router swaps: 1 ETH → 2,500 USDC via DEX aggregator
3
Intent Created
Gateway creates intent: “2,500 USDC → Arbitrum → user address”
4
Solver Detects
Solver’s monitoring system detects the
OrderCreated event5
Solver Pays
Solver sends 2,500 USDC from their SolverPool on Arbitrum
6
Destination Swap
SolverRouter swaps: 2,500 USDC → 2,000 ARB
7
User Receives
2,000 ARB delivered to user’s wallet on Arbitrum
Slippage Protection
Every intent includes protection parameters:| Protection | Behavior |
|---|---|
| Min Output | If solvers can’t meet the threshold, intent remains unfilled |
| Expiry | After expiry, RefundPool automatically returns funds |
| Slippage | Set via API (default 0.05% / 5 basis points) |
No Additional Approvals
Users only approve the initial token transfer. All subsequent operations:Router Executed
All swaps handled by Router contracts
Whitelisted DEXes
Only approved aggregators used
Atomic Transactions
Everything happens in single transactions
Execution Timing
| Phase | Duration |
|---|---|
| Source transaction confirmation | ~12 seconds (Ethereum) |
| Solver detection & execution | ~1-3 seconds |
| Destination confirmation | ~1-2 seconds (L2s) |
| Total | ~5-15 seconds |
L2-to-L2 transfers are fastest. Transfers involving Ethereum mainnet take longer due to block times.
Next: Learn about Settlement — how solvers get credited.