Testnet RBTC Conversion on Rootstock: Seamless Cross-Network Transactions

In this section we will go over the steps of converting t-BTC to tRBTC, and vice versa on the Bitcoin and RSK Testnets.

Note: The minimum amount of Bitcoin to convert is 0.005 tBTC for Testnet.

tBTC to tRBTC conversion

Instructions on how to do a Testnet peg-in.

1 Connect a wallet to Bitcoin Testnet

We recommend to use Electrum BTC wallet for connecting to Bitcoin Testnet.

• Download the wallet from Electrum Website
• Install Electrum
• Start Electrum in Testnet mode
  • For example on MacOS: /Applications/Electrum.app/Contents/MacOS/Electrum --testnet
• After Electrum starts, create or import a wallet
• Go to the third tab, "Receive". You will see a Bitcoin Testnet address like below.

Note: The Bitcoin wallet needs to be legacy (not Segwit) whose public key starts with either m or n, and private key starting with p2pkh:

2 Get test Bitcoin from Testnet Faucet

There are a few options to get Bitcoin on Testnet. We use https://testnet-faucet.mempool.co/

3 Send Bitcoin to RSK Federation address

The RSK Federation address is retrieved by making a Smart Contract call on RSK Testnet. In order to make the call, you will need to have MyCrypto installed, select RSK Testnet in "More Networks", and Navigate to "MyCrypto -> Contracts -> Select Existing Contracts -> "Bridge" -> "getFederationAddress" to execute the call. It should look like the screenshot below.

Once you have the RSK Federation address, you can send Bitcoin to it from your Bitcoin address.

Note: You need to send a minimum amount of 0.01 tBTC for conversion.

4 Get tRBTC address with tBTC private key

You can get a corresponding tRBTC address from your tBTC private key by using github.com/rsksmart/utils. If you do not want to compile the utility, you can download the latest release.

Note: when entering Bitcoin private key do not include p2pkh: in the front.

5 Check tRBTC balance on Testnet

You can check the balance of the above tRBTC address on Metamask, MyCrypto or any RSK Testnet compatible wallets.

Note: You have to wait a minimum of 10 confirmations + a minimum of 5 minutes for checking your RBTC balance

tRBTC to tBTC conversion

Instructions on how to do a Testnet peg-out.

1 Get tBTC address with tRBTC private key

You can get a corresponding tBTC address from your tRBTC private key by using github.com/rsksmart/utils. If you do not want to compile the utility, you can download the latest release.

2 Send tRBTC to RSK Bridge Contract

RSK Bridge Contract address: 0x0000000000000000000000000000000001000006

Important note: The minimum amount to send must be at least 0.004 tRBTC for Testnet, values below that will be rejected and reimbursed to the sender.

Gas Limit of the transaction needs to be manually set at 100,000 gas; otherwise the transaction will fail. Gas Price can be set to 0.06 gwei.

3 Check balance of tBTC address on Bitcoin Testnet

You can either use Electrum wallet downloaded earlier or from any Bitcoin explorer to check the balance.

Note: The release process on Bitcoin network takes 10 RSK block confirmations and at least 10 more minutes.