Add API call to get account & token balances

[Goro2030]

It would be great if the user could get an account balance in rBTC, and also the tokens balance, providing the contract address.

I currently do this through Blockscout, but lately, they have not been updating their database, and the results are "old" results.

Get rBTC balance:
https://blockscout.com/rsk/mainnet/api?module=account&action=balance&address=0x2

Get BPRO balance:
https://blockscout.com/rsk/mainnet/api?module=account&action=tokenbalance&contractaddress=0x440cd83c160de5c96ddb20246815ea44c7abbca8&address=0x2

[Kali-Decoder]

Hey it is assigned to someone or I can take over this ??

[Goro2030]

Thanks @Kali-Decoder ! I thought after 40 months no one would ever look at this... is the community activelly developing on RSK? This is a SO SIMPLE request :)

For example, the MoneyOnChain guys have this: