How to swap HUSD across the IOST blockchain?

Notice:

Your account must be verified to use the HUSD cross-chain swap function. If you have not completed KYC verification yet, please go to [User Center] - [KYC verification], and submit your KYC verification request on https://my.stcoins.com/kyc/index. Once your account is approved, you can start using HUSD cross-chain swap.

Important Notice: We ONLY support IWallet (Version 0.2.7) and MetaMask wallet now，more wallets will be supported in the future, please follow our notice

Before the Swap:
1. We currently support the two-way cross-chain swap between ERC20-HUSD and IOST-HUSD, which requires adding the corresponding Ethereum and/or IOST wallets on your device. You can download the wallets from the links below:

• IWallet official wallet download address: https://iost.io/wallet_en/

• Ethereum official wallet download address: https://ethereum.org/en/wallets/find-wallet/

• MetaMask(common Ethereum wallet) wallet download address: https://metamask.io/download.html 

2. Log in to your wallet account and add HUSD to your account.

To Begin the Swap:
Log in to your STCOINS account, select [HUSD Swap] in the upper right-hand corner to enter the HUSD Swap page and select the target chain you want to swap.

I. How to Swap ERC20-HUSD To Another Blockchain
The following steps show you how to swap ERC20-HUSD to IOST-HUSD:

1. Select [Get Non-ERC20 HUSD] and select [IOST-HUSD]. Select [Connect Wallet] and select the wallet bound to your device. Select [Confirm] and you will be shown your Ethereum wallet address(the wallet where the ERC20-HUSD is stored). Example image below:

2. Enter your IOST wallet address in the Destination Address field. Note: This is the wallet that you will use to receive the IOST-HUSD following the swap. Example image below:

Important Notice: Please make sure that your wallet address is entered correctly because errors may not be recoverable. Once the swap is completed, the assets will be held by the account owner of the destination address entered.

3. Enter the transaction amount. If you wish to swap the total amount of HUSD in your account balance, select [All]. Note: The amount of a transaction must be greater than the single transaction fee, and the actual amount you will receive is the transaction amount after deducting the transaction fee. Example image below:

4. Select [Swap] and a window will pop up to confirm your transaction details. Please make sure your transaction details are correct before selecting [Confirm]. Next, you will be requested to authorize the transaction and the pay the gas fee. Once authorized, you will be notified that the swap request has been submitted successfully. Example image below:

Important Notice: Please ensure that you have sufficient native currency balance (e.g. ETH if swapping from ERC20-HUSD and IOST if swapping from IOST-HUSD) in the transacting wallet to pay the gas fee for the transaction. Otherwise, you will not be able to submit the swap request.

5. You can check the status of your transaction under [Transaction Records]. It is estimated that a swap generally takes about 10-20 minutes to complete - the actual settlement time is dependent on the speed of the block confirmations. When the blockchain transaction is confirmed, you can check your HUSD（IOST）in your destination IOST wallet address provided.

II. How to Swap HUSD From Another Blockchain to ERC20-HUSD
The following steps show you how to swap from IOST-HUSD back to ERC20-HUSD:

1. Select [Get ERC20-HUSD] and select [IOST-HUSD].Then select [Connect Wallet] and select the wallet bound to your device. Select [Confirm] and your IOST wallet address will be shown under [Transaction Wallet Address].

2. Enter your Ethereum address in the Destination Address field. Example image below:
Important Notice: Please make sure that your wallet address is entered correctly because errors may not be recoverable. Once the swap is completed, the assets will be held by the account owner of the destination address entered.

3. Enter the Transaction Amount. If you wish to swap the total amount of HUSD in your IOST wallet account balance, select [All]. Note: The amount of a transaction must be greater than the single transaction fee. The actual amount you will receive in the destination wallet is the amount after the transaction (gas) fee is deducted during the transaction. Example image below:

4. Select [Swap] and a window will pop up to confirm your transaction details. Please make sure your transaction details are correct before selecting [Confirm]. Next, you will be requested to authorize the transaction and the pay the gas fee. Once authorized, you will be notified that the swap request has been submitted successfully. Example image below:

Important Notice: Please ensure that you have sufficient native currency balance (e.g. ETH if swapping from ERC20-HUSD and IOST if swapping from IOST-HUSD) in the transacting wallet to pay the gas fee for the transaction. Otherwise, you will not be able to submit the swap request.

5. You can check the status of your transaction under [Transaction Records]. It is estimated that a swap generally takes about 10-20 minutes to complete - the actual settlement time is dependent on the speed of the block confirmations.