feat: Update README

new URLs

also there was the slightest modification of the original source to make the onlyOwner an explicit modifier

Author: jtakalai

README.md

@@ -2,17 +2,19 @@
 
 ## List of files
 
-| File                           | Description | Mainnet |
+| File                           | Description | Deployed |
 |--------------------------------|-------------|---------|
-|contracts/CrowdsaleToken.sol    | The current (or "old") DATA token | [0x0cf0...23](https://etherscan.io/address/0x0cf0ee63788a0849fe5297f3407f701e122cc023#readContract)
-|contracts/DATAv2.sol            | The new DATA token | [0x8f6...b76](https://etherscan.io/address/0x8f693ca8d21b157107184d29d398a8d082b38b76#readContract)
-|contracts/DataTokenMigrator.sol | Migrator contract that acts as UpgradeAgent for the old token | [0xc7...c16c](https://etherscan.io/address/0xc7aaf6c62e86a36395d8108fe95d5f758794c16c#readContract)
+|contracts/CrowdsaleToken.sol    | The current (or "old") DATA token | ETH [0x0cf0...23](https://etherscan.io/address/0x0cf0ee63788a0849fe5297f3407f701e122cc023#readContract)
+|contracts/DATAv2.sol            | The new DATA token | ETH [0x8f6...b76](https://etherscan.io/address/0x8f693ca8d21b157107184d29d398a8d082b38b76#readContract) BSC [0x0864...2a](https://bscscan.com/address/0x0864c156b3c5f69824564dec60c629ae6401bf2a#readContract) xDAI [0x256...47D](https://blockscout.com/poa/xdai/address/0x256eb8a51f382650B2A1e946b8811953640ee47D)
+|contracts/DataTokenMigrator.sol | Migrator contract that acts as UpgradeAgent for the old token | ETH [0xc7...c16c](https://etherscan.io/address/0xc7aaf6c62e86a36395d8108fe95d5f758794c16c#readContract)
 |contracts/IERC677.sol           | Interface of ERC677 as defined in [the LINK token](https://etherscan.io/address/0x514910771af9ca656af840dff83e8264ecf986ca#code) |
 |contracts/IERC677Receiver.sol   | Interface of ERC677Receiver also defined in [the LINK token](https://etherscan.io/address/0x514910771af9ca656af840dff83e8264ecf986ca#code) |
 |contracts/MockRecipient.sol     | IERC677Receiver implementation for the purpose of testing |
 |test/DATAv2-test.js             | DATAv2.sol tests |
 |test/DataTokenMigrator-test.js  | DataTokenMigrator.sol tests |
+|contracts/DATAv2onPolygon.sol `*` | DATAv2 deployed on MATIC/Polygon chain, extended slightly for bridging | MATIC [0x3a9...34](https://polygonscan.com/address/0x3a9A81d576d83FF21f26f325066054540720fC34#code) |
 
+`*` _added after the audit_
 ## DATAv2 features
 
 Some of the following features are inherited from [OpenZeppelin contracts](https://github.com/OpenZeppelin/openzeppelin-contracts/tree/v4.0.0/contracts):
@@ -60,4 +62,4 @@ Explanations of the origins and intents of all code found in DATAv2.sol:
 | 1...12  | OpenZeppelin and interface imports, DATAv2 token properties |
 | 16...46 | Adapted from @openzeppelin/contracts/token/ERC20/presets/ERC20PresetMinterPauser.sol to implement the minting feature. The AccessControl.sol is a bit of a can of worms when it comes to state-space: the "role admin" can set up any constellation of roles and grant those roles and their administration to anyone; its implementation is quite elegant though, so it didn't feel very significantly worse than a "brute" `mapping (address => bool) isMinter` type of implementation, especially since it's all library code. Added isMinter convenience function. |
 | 48...74 | Adapted from LINK token to implement the ERC-677 token transfer hook. Recipient smart contracts can now react to DATAv2 token transfer which makes approve+transferFrom two-transaction flow avoidable if not entirely redundant. Decided to go for the simply ERC-677 instead of the ERC-777 because of some misfeatures on ERC-777 (defaultOperators, higher plain transfer gas price) as well as uncertain adoption at this stage. |
-| 76...98 | Allow the admin to change token symbol and name just in case, e.g. to support token rebranding, and graceful end-of-life after the possible next migration |
+| 76...103 | Allow the admin to change token symbol and name just in case, e.g. to support token rebranding, and graceful end-of-life after the possible next migration |