## Why Cross-Chain Matters
OraclBet runs on Polygon for its low fees and fast confirmations. But your USDC might be on Ethereum, Base, Arbitrum, or another chain. Cross-chain deposits bridge this gap seamlessly.
## Supported Chains
| Source Chain | Bridge Time | Gas Cost | |-------------|-------------|----------| | Polygon (native) | Instant | < $0.01 | | Ethereum | 5-15 minutes | $2-10 | | Base | 2-5 minutes | < $0.50 | | Arbitrum | 2-5 minutes | < $0.50 |
## How It Works
1. **Select source chain** in the deposit interface 2. **Approve USDC spending** — one-time approval for the bridge contract 3. **Confirm bridge transaction** — sends USDC from source chain to Polygon 4. **Automatic credit** — once the bridge confirms, USDC appears in your OraclBet balance
The bridging is handled automatically — you don't need to manually interact with bridge protocols.
## Tips for Cross-Chain Deposits
### Minimize Costs - Bridge from L2s (Base, Arbitrum) when possible — much cheaper than Ethereum mainnet - Batch your deposits — bridge a larger amount once rather than small amounts frequently - Check gas conditions — Ethereum gas varies significantly by time of day
### Maximize Speed - Polygon native deposits are instant - L2 to L2 bridges are faster than L1 to L2 - Avoid bridging during high network congestion
## Security Considerations
- Only deposit from wallets you control - Verify the bridge transaction on the source chain's block explorer - Cross-chain deposits are verified on both chains before crediting
## Conclusion
Cross-chain deposits make OraclBet accessible regardless of which chain your USDC is on. The process is automated, secure, and typically completes in minutes.