GITBOOK-58: change request with no subject merged in GitBook

Author: just-a-node

usecases/xerc20/setup-guide.md

@@ -99,11 +99,28 @@ function burn(address _user, uint256 _amount) external;
 
 #### LockboxAdapter
 
-You might have noticed there's a `LockBoxAdapter` contract in the diagram above when you have a Lockbox setup. This contract facilitates the unwrapping of `xERC20 -> ERC20` on the destination chain. 
+You might have noticed there's a `LockBoxAdapter` contract in the diagram above when you have a Lockbox setup. This contract facilitates the unwrapping of `xERC20 -> ERC20` on the destination chain and is needed for UIs to do this step for users.
 
-We recommend deploying an adapter on each Lockbox chain so that bridge UIs can deliver the asset that the user expects to receive.
+The Connext team has a `LockboxAdapter` deployed to all our supported chains (the implementation is available [here](https://github.com/connext/chain-abstraction-integration/blob/c35fbe757946cc76a826d93595cd99fd0db39c27/contracts/integration/LockboxAdapter.sol)). Use these if you plan to enable Connext as a bridge and want your token listed in our UI. 
 
-You can deploy a simple Lockbox adapter like [this one](https://github.com/connext/chain-abstraction-integration/blob/next-lockbox-adapter/contracts/integration/Connext/NextLockboxAdapter.sol).
+Mainnets:
+
+* Ethereum: 0x45bf3c737e57b059a5855280ca1adb8e9606ac68
+* Polygon: 0x6777c6713F13e499232B3a0CdA246e357a9Cf5EB
+* Optimism: 0x81dADc774d2ae44Eb30D2290d076Ae67F9800bd5
+* Arbitrum: 0x0B52cA1406eeA3Ce1fcc37dC0121845eF1de3Ae8
+* Gnosis: 0x3Cb55bFBB1f4973FCb9705Bab4aBb7E72BF85eAF
+* BNB: 0xB71D06f2e73918386B75c24dD26c95DD938f7912
+* Linea: 0x4895aa5d666c81a04ebcc7a9aa47f249b1c46aa6
+* Mode: 0x981A06E33b228299f33a45a892d7AA61d0b95a83
+* Base: 0x542AaB88B14055e47222791276967Db5f9B840f6
+* Metis: 0x5bB83e95f63217CDa6aE3D181BA580Ef377D2109
+
+Testnets:
+
+* Goerli: 0x8528d3B173a149CB0eae5e2d7335123bcF888c9f
+* Optimism-Goerli: 0x55fc076b9b0618a657f8986c83a97bd06e8a80f2
+* Mumbai: 0xec531b272fa2b82efe49ef6d830c2d848753642a
 
 #### Whitelisting bridges