FAQ for Poly Bridge Users

Though not exhaustive, these FAQs will help you get started and troubleshoot some of the most common user problems for you when using Poly Bridge.

Stay tuned with us:

· Official site：https://www.poly.network/

· Poly Bridge: https://bridge.poly.network

· Twitter: https://twitter.com/PolyNetwork2

· Medium: https://medium.com/@polynetwork

· Telegram: https://t.me/polynetworkgroup

· Discord:https://discord.gg/xXxJa3sm

· Github: https://github.com/polynetwork

· User Guides and Tutorials:https://medium.com/poly-network/tagged/tutorial

Q1 What is Poly Network?

Poly Network is a global cross-chain protocol for implementing blockchain interoperability and building Web3.0 infrastructure. Its uniquely designed cross-chain bridge technology executes cross-chain transactions by deploying smart contracts on the source chain and enabling communication between heterogeneous chains, including the more popular public chains, right at the protocol layer.

Poly Network has integrated 20+ blockchains, including Ethereum, BNB Chain, Polygon, Avalanche, Fantom, Arbitrum, Optimism, Metis, Boba, OKC, HECO, Neo, Ontology, Zilliqa, Gnosis Chain, etc. Since the launch, the protocol has enabled cross-chain asset transfer of more than 16 billion U.S. dollars involving more than 354,000 addresses on different blockchains.

Q2 What’s the relationship between Poly Network and Poly Bridge?

Poly Network incorporated many dApps, including Poly Bridge that was created by Poly Network.

Q3 Does Poly Network issue any token?

Poly Network hasn’t issued any token yet.

Q4 Is Poly Network related to Polygon, Polymath, or Polychain Capital?

No, Poly Network is not related to them. It’s just a coincidence that we all have “POLY” in our names. However, Poly Bridge supports transactions from and to the Polygon chain.

Q5 How to transfer my assets between two chains through Poly Bridge?

(1) PC User Manual for Token Transaction on Poly Bridge 2.0:

https://medium.com/poly-network/pc-user-manual-for-token-transaction-on-poly-bridge-2-0-5d6a357090fb

(2) User Manual for NFT Transaction on Poly Bridge 2.0: https://medium.com/poly-network/user-manual-for-nft-transaction-on-poly-bridge-2-0-d5d195c20200

Q6 How much fee does Poly Bridge charge per transaction?

In order to cover the gas fee charged by your target chain, Poly Bridge will collect fees accordingly when you cross-chain your assets. No extra fee is charged.

Q7 Is the bridge rate 1:1?

Normally yes, except for deflationary tokens.

Q8 How long does it take per transaction?

Average estimated time of arrival is 1–10 min. Irresistible factors such as network congestion might delay the transaction. If your transaction hasn’t been completed for a long time, please refer to Q9.

Q9 I have waited a long time and still haven’t received my asset. What can I do?

Please check which step your transaction has reached. Solutions vary from different steps：

• The transaction hasn’t been completed on the source chain：For safety reasons, Poly Bridge will not confirm your transaction immediately until subsequent blocks have been confirmed (the number of subsequent blocks is different for different chains), please wait for block confirmation.
• The transaction has been completed on the source chain, but not completed on Poly: if the transaction has been stuck in this step for over 5 min, please do not hesitate to contact the Poly Network Team: https://discord.com/invite/y6MuEnq
• The transaction hasn’t been completed on the target chain: it’s perhaps down to the transaction congestion of the target chain, please wait for a while or refer to the accelerated transaction tutorial:https://medium.com/poly-network/poly-bridge-new-acceleration-function-pc-user-manual-cd0b6cacceea. If the accelerated tutorial doesn’t work, please contact the Poly Network team: https://discord.com/invite/y6MuEnq

Q10 Where can I find my previous transaction or check the status of my transaction?

You can check your previous transaction in “History”. And then click “Status” to check the current progress.

Q11 The transaction is confirmed in my history but why aren’t the tokens showing in my metamask.

You may have to manually add that specific token to your metamask. This can be achieved by selecting the “import tokens” option in your metamask wallet and then copy-paste the token contract address for the asset you wish to add. If properly executed, your tokens will appear in your wallet immediately.

Q12 When an error is shown on my wallet page, what shall I do?

Firstly, make sure you have approved enough amount for Poly Bridge contract to use the token;

Secondly, make sure you have sufficient native tokens to cover the gas fee charged both by source chain and target chain and the amount you want to transfer.

If you transfer native tokens:

$amount in your wallet ≥ transfer amount + src chain gas fee + target chain gas fee

If you transfer non-native tokens:

$native token amount in your wallet ≥ src chain gas fee + target chain gas fee

For example, if you want to transfer $Metis from Andromeda to BSC, you have to reserve tokens both for source chain gas fee and for target chain gas fee. The rest are the amount of tokens you can transfer.

For your better use, Poly Bridge set as follows:

1. If $native token amount in your wallet < transfer token amount + src chain gas fee + target chain gas fee, you’ll be informed that the transferable token amount is ZERO and see a WARNING of “insufficient funds” after clicking MAX;

2. If $native token amount in your wallet > transfer token amount + src chain gas fee + target chain gas fee, the max amount of transferable token = $native token amount in your wallet -target chain gas fee -estimated src chain gas fee. To guarantee the sufficient transaction fee on src chain, the estimated src chain gas fee could be slightly higher than the actual fee, so that some native tokens will remain in your account after transaction (i.e., native token won’t be totally transferred);

Thirdly, if you encounter other types of error, please contact the Poly Network team: https://discord.com/invite/y6MuEnq

Q13 When I click MAX, why is the amount of transferable token less than my overall balance?

Here are three conditions:

1. Poly bridge will reserve transaction fee of both src chain and target chain for users (Tips: the fee will be reserved only when the transferred token is native token). So, the transferable token amount doesn’t equal to your account balance.

2. Some tokens may have their own characteristics that limit the amount of transfer, so you may not be able to transfer all your assets in one time (but you can break it into several times).

3. When the liquidity of target chain is lower than your account balance, you cannot transfer all your assets in one time. Please contact Poly Network team under this condition: https://discord.com/invite/y6MuEnq.

Q14 Why is the liquidity of the target chain shown sufficient in “Max available amount” before sending a transaction and then after the transaction on the source chain is completed, the transaction on the target chain fails because of insufficient liquidity?

The liquidity shown in “Max available amount” refers to liquidity for all users, not your share of the liquidity. If there are several users initiating large transactions at the same time, the liquidity might be insufficient for all transactions. It happens mostly when the amount you transfer is close to the max available amount. Under this occasion, Poly Network will contact the relevant project to add liquidity as soon as possible.

Q15 Can I use Poly Bridge via mobile devices?

Sure you can! Here are the token transaction manual for mobile users:

https://medium.com/poly-network/user-manual-for-token-transaction-on-poly-bridge-2-0-for-mobile-devices-c9ca8497c4f7 and NFT transaction manual for mobile users: https://medium.com/poly-network/mt-user-manual-for-nft-transaction-on-poly-bridge-2-0-62e4202600e0.

Q16 When “unknown wallet error” pops up on the Poly Bridge page, what shall I do?

Please check whether the network you connect to is stable by switching nodes of the network.

Q17 When I encounter an error submitting an accelerated transaction, what shall I do?

First of all, please do not submit the accelerated transaction when you encounter an error. Because when the error is shown, the transaction has already been completed on the target chain.

Please check the balance in your wallet to see whether you have received your assets. If you have not, please contact the Poly Network team: https://discord.com/invite/y6MuEnq

Q18 If my transaction is stuck on the bridge can I cancel the transfer and receive a refund instead?

All transactions at any stage are IRREVERSIBLE. If your transaction is stuck or takes a long time to arrive, please refer to Q8 and Q9.

Q19 If I have not applied Poly Bridge frontend to process my transaction and can’t receive my assets, what shall I do?

Firstly, please make sure you have paid enough fee to Poly Bridge, you can check it by calling the “get fee” api. If you haven’t paid enough fee, it is recommended that you use the acceleration function to speed up the target chain transaction.

Secondly, if you have already paid enough fee or tried to accelerate but the transaction still fails, please contact the Poly Network team: https://discord.com/invite/y6MuEnq

Q20 When migrating funds to or from ETH, why is the fee so high?

Ethereum’s high gas fee has been a concern for many, and is a key hurdle in the platform’s scaling ability. The fee is not generated by Poly Bridge and solely depends on ethereum.