[New chain]: RSK Mainnet

### ChainId

30

### Chainlist

https://chainlist.org/chain/30

### Contract deployed

- [X] I confirm that the contracts are deployed

### Version of contracts deployed

v1.3.0

### Relevant information

https://github.com/ethereum-lists/chains/blob/master/_data/chains/eip155-30.json
RPC endpoint: https://public-node.rsk.co
Block explorer: https://explorer.rsk.co