Guide to Bridging from BSC to Polygon
A guide on how to move assets from Binance Smart Chain to Polygon
Successful DeFi users are always on the lookout for the hottest 🔥 ways to earn across various blockchain networks. So - how is it that they manage to transfer their funds from one blockchain to the next? They use a Bridge service! Go ahead and read this article which is a part of the Crystal Clear Educational Series to discover how you can easily move some funds from BSC to Polygon!
⚠️Disclaimer: None of the information on this article should be interpreted as financial advice.⚠️

What is a Bridge?

To put it simply, a Bridge is a service provided by a middleman entity that is willing to take your cryptocurrencies on one network such as BSC and “transfer” them to another network such as Polygon. At least... That's how it seems to work at a glance 👀!
In reality, when a user utilizes a Bridge service their original tokens don’t actually leave the network! What really happens behind the scenes is that the middleman accepts a deposit on the original Network A and keeps it. Next, since they have an agreement with you to Bridge your funds, they actually use their own funds on Network B to send an equivalent deposit of tokens to the destination address you specified for that network! Minus the service fees 😉.

Why are Bridge services required?

You might be thinking, “I don’t need a Bridge, I’ll just send my BNB from my BSC wallet address to my Polygon wallet address”.
Stop 🛑!
If you try to do this, there is a big chance that your funds will be lost and you will never get them back 😱!
Cryptocurrencies cannot transmit across different networks. Each token follows its own standard (called a token protocol), which can only be interpreted by its native blockchain. For example, in the case of BSC the token protocol is BEP20, in the case of Ethereum and Polygon it is ERC20. To put it simply, if you try to send a BEP20 token to a ERC20 address it is akin to depositing money from a game of Monopoly into a real bank’s ATM machine. Not only will the machine reject your deposit, but it will probably get stuck and you’ll be left missing a bill next time you sit down to play the board game with your friends 😥!
⚠️Warning: Do not attempt to send tokens from an address on one network to an address on another network without a Bridge service!⚠️

Which Bridge should I use?

Nowadays there are many Bridge services capable of assisting you with moving your balance across different networks. Consider the following points when choosing a Bridge service:
  • Does the Bridge support the token you want to transfer 🤔?
  • Does it operate quickly? No one likes waiting 😤!
  • Is the Bridge used by other people? It's a lot more comfortable knowing you are not the only one using a service 😌!
  • Are there any fees or commissions? It's always nice to save some funds 💰…
  • If you do not receive your transfer, is there a way to contact the service operators to help you recover your funds?
  • Is the Bridge trustworthy overall? 🤝
⚠️Disclaimer: Please exercise caution when choosing to use a Bridge service, only use a service that you personally trust! The service provider and yourself are the only ones that can be held responsible for your funds.⚠️

How to Bridge from BSC to Polygon?

Buying a token that can be bridged

Hopefully you’ve read all the important information above and consider yourself ready to use a Bridge. In this example, we will use a Bridge to send some $BANANA 🍌 from BSC to Polygon using Multichain.xyz which is provided by ApeSwap as a convenience on their site. Note that we are not soliciting the use of any Bridge over another. The information that follows is only provided for educational purposes and it is not financial advice!
Go ahead to navigate to the Multichain.xyz Bridge that way or simply visit the following link. Once there, you should see something similar to the picture below.
If we hover the information icon (i) we can see some useful information, such as the minimum and maximum amounts that can be sent, as well as the fees. Looks like a good deal!
Okay, we’ll go ahead and get some $BANANA 🍌 on the ApeSwap exchange.
🧐Note: MetaMask is a great wallet because you can use the same wallet address on both BSC and Polygon networks!🧐
Standard stuff, press “Connect to a wallet” to connect your wallet to the ApeSwap dApp. In our case, we have some USDT in our MetaMask wallet connected to the Binance Smart Chain. In your case, swap whatever token you are willing to part with in order to Bridge funds to Polygon.
Always consider the information provided by the exchange to ensure you are getting a good deal - especially if you are going to Bridge a lot of $BANANA 🍌! Go ahead and Approve whatever token you are swapping for $BANANA 🍌.
Before you proceed, do consider that this token is a volatile asset - it is not a stablecoin! Since you are deciding to buy and Bridge these tokens, do understand that their value may fluctuate. That being said - $BANANA 🍌 has been relatively stable this July 2021 (see chart on Coingecko). If you were planning to sell them immediately after they are Bridged to Polygon - you would likely get away with a minimal difference. Having understood this, hit the “Swap” button and confirm the transaction.
Alright, now we have some $BANANA 🍌. Let's go back to Multichain.xyz.
Make sure to connect your wallet! Then we input how many $BANANA we want to Bridge from BSC to Polygon.
But wait a minute, where in the world are these funds going to be sent? In this case, the Multichain.xyz service simply transfers them to the same address on the Polygon network as the one you are currently using to interact with the site on BSC.
In the above picture you may find the display where your wallet address is available in MetaMask. If you’ve followed our previous article on setting up a MetaMask wallet for the Polygon network you should already be familiar with this interface. When we Bridge our $BANANA 🍌 they will go to the same address on the Polygon network as the address for our BSC wallet that currently holds our $BANANA 🍌.
Go ahead and hit that “Transfer” button (if you understood the above). Then approve the transaction and simply await the delivery of your funds!
The site notifies us of the ongoing Bridge process. Very assuring!
Done! Wow, that only took a minute! Lets click the “Transfer transaction successful” text so that we can confirm the delivery of our $BANANA 🍌.
Everything looks right, it’s a transaction delivering $BANANA 🍌 to the same address as in our MetaMask.
We did it! Our $BANANA 🍌 from BSC is now truly in our address on the Polygon network. If we want, we can now exchange it for an asset such as a stablecoin i.e. USDC right here on ApeSwap! Make sure to switch to the Polygon network to do this, since your tokens are now on the Polygon network and not on BSC. Of course, you could also grab some $CRYSTL 💎. The choice is yours, and the possibilities are endless 😁!
Here is the link to swap $BANANA to $CRYSTL for your convenience. Don’t forget to also use some of those funds to get yourself some more $MATIC - you wouldn’t want to run out of funds to pay for transactions 😁 and rely on faucets forever.

What’s Next?

If you’ve been following these articles, recognize that you’ve come a long way! You are capable of Bridging from BSC to Polygon, and maybe you’ve even got some $BANANA 🍌 or $CRYSTL 💎 in that Polygon wallet right now! Give yourself a thumbs up 👍!
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On this page
What is a Bridge?
Why are Bridge services required?
Which Bridge should I use?
How to Bridge from BSC to Polygon?
Buying a token that can be bridged
What’s Next?