# Bridge

Bridge supported assets between W Chain and other networks using W Swap’s Bridge page. This guide covers supported chains and tokens, approvals, transaction statuses, and best practices.

### Overview

* Networks Supported: `Ethereum`, `BNB Chain`, and `W Chain`
* Native Tokens: `ETH` (Ethereum), `BNB` (BNB Chain), `WCO` (W Chain)
* Purpose: Move supported assets cross‑chain to trade or provide liquidity on W Chain
* Finality: A validator-based process confirms bridge transfers; funds are minted or released when votes reach quorum

### Supported Assets

* From Ethereum → W Chain:
  * `USDT`
  * `USDC`
* From BNB Chain → W Chain:
  * `bUSDT`
  * `bUSDC`
  * `XRP` (BEP‑20)
  * `DOGE` (BEP‑20)
  * `SOL` (BEP‑20)
* From W Chain → Ethereum or BNB Chain:
  * Tokens mirrored on W Chain including `USDT`, `USDC`, and Binance‑peg variants (`bUSDT`, `bUSDC`), plus `XRP`, `DOGE`, `SOL` for BNB Chain direction.

Note:

* Token availability depends on the selected From/To networks. The Bridge page filters assets accordingly.
* On W Chain, bridged tokens have distinct addresses; always verify the token symbol and address shown in the UI.

### Chain IDs and Explorer Links

* Chain IDs:
  * `Ethereum Mainnet`: `1`
  * `BNB Chain Mainnet`: `56`
  * `W Chain Mainnet`: `171717`
* Explorers (used by the DApp):
  * Ethereum: `https://etherscan.io/tx/<hash>`
  * BNB Chain: `https://bscscan.com/tx/<hash>`
  * W Chain: `https://scan.w-chain.com/tx/<hash>`

Testnets (if applicable):

* `Sepolia` (Ethereum): `11155111`
* `BNB Chain Testnet`: `97`
* `W Chain Testnet`: `71117` (Explorer: `https://scan-testnet.w-chain.com/tx/<hash>`)

### Prerequisites

* A supported EVM wallet (e.g., Rabby—recommended for enhanced safety—or MetaMask).
* Gas on the source chain (`ETH` for Ethereum, `BNB` for BNB Chain, `WCO` for W Chain).
* The token you want to bridge in your source chain wallet.

### Bridging Steps

1. Open the `Bridge` page and connect your wallet.
2. In `From`, choose the source network (Ethereum / BNB Chain / W Chain). In `To`, choose the destination.
3. Select a supported asset for the chosen route; use the token selector or search.
4. Enter the amount to bridge. The UI shows any limits/fees and estimated arrival.
5. If prompted, click `Approve` to grant the bridge contract permission to transfer your token.
6. Click `Bridge` and confirm in your wallet.
7. Track status in the `Confirm` modal and `Bridge History`. Typical statuses include:
   * `Transaction Initialized`
   * `Transaction Pending`
   * `Transaction Submitted`
   * `Transaction Awaiting Validators Votes`
   * `Transaction Successful` (funds arrive on destination)
   * `Transaction Failed` or `Rejected`

Arrival and Claiming:

* No manual claim step is generally required. Funds are credited on the destination chain once validators finalize the transfer.
* The DApp provides explorer links for both source and destination transactions.

### Fees and Timing

* Fees vary by route and token. They are displayed before you confirm the bridge.
* Timing depends on source chain congestion and validator finalization. Expect longer times during network congestion.

### Bridge History

* Use `Bridge History` to review previous transfers, current status, and retry or reference transaction hashes as needed.

### Troubleshooting

* `Approval Required`: Approve the specific token on the source chain before bridging.
* `Unsupported Route`: Switch networks or choose a supported asset for the selected From/To pair.
* `Pending Too Long`: Check the explorer links and try again during lower congestion; ensure adequate gas.
* `Rejected/Failed`: Review wallet prompts, increase gas settings if necessary, and retry.

### Safety Tips

* Only bridge tokens listed by the DApp; do not paste arbitrary addresses.
* Confirm the `From` and `To` networks are correct before submitting.
* Maintain sufficient gas on both sides if you plan to interact immediately after bridging.

### FAQs

* Can I bridge directly to trade? Yes—bridge first to W Chain, then use the Trade page.
* Do I need to claim funds? No, funds arrive automatically after validator finalization.
* Where do I find transaction links? In the modal and history, linking to `etherscan.io`, `bscscan.com`, and `scan.w-chain.com`.


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