Kuyumcu is a cryptocurrency swap service. It allows you to exchange the USDC (on Polygon Network) to Nano and vice-versa. The balance will be available in your wallet instantly.

Currently, the following limits per transaction apply:

For buying USDC: Minimum amount is 0.1 NANO. Maximum amount depends on the current USDC balance of Kuyumcu.

For selling USDC: Minimum amount is 1 USDC. Maximum amount depends on the current Nano balance of Kuyumcu.

If you're selling USDC, there's a gas fee of the Polygon network which can cost a few cents. Other than that, there are no fees. Transactions are carried out at the current exchange rate of Kuyumcu, which can be seen on the buy/sell buttons and on the deposit page.

First of all, remember to store your seed in a safe place so that you can switch between wallets when there's a problem with the wallet or device you're using.

For Nano on mobile, use Natrium from App Store/Google Play. On web, you can use Nault.

For USDC, MetaMask for web and Trust Wallet for mobile can be used as a wallet. You can find the network details on the question below.

Network name: Polygon Mainnet

RPC URL: https://polygon-rpc.com/

Chain ID: 137

Block Explorer URL: https://polygonscan.com/

USDC:

Token Contract Address: 0x2791Bca1f2de4661ED88A30C99A7a9449Aa84174

Token Symbol: USDC

Token Decimal: 6

To get Nano in exchange for USDC, you will need a Nano address where the bought Nano amount will be sent to. If you don't have one, you can create a Nano address from a number of different services, for example with Nault. Also, you will need an Ethereum wallet (on the Polygon network) with USDC balance, you can use your MetaMask wallet.

1. On the Kuyumcu main page, click the "BUY Nano" button.
2. Enter your Nano address that you want to receive coins to, and enter a USDC refund address, then click the "Continue" button.
3. You will be shown a USDC address. From your wallet, send the USDC amount that you want to sell. The amount you send must be between the specified minimum and maximum amounts.
4. Press the "Submit" button to finalize the transaction.
5. On the final screen, you will see the USDC amount you've bought and the exchange rate. You can click the "Transaction" link to see the transaction on the blockchain.

To get USDC in exchange for Nano, you will need an Ethereum wallet that is on the Polygon network, where the bought USDC amount will be sent to. If you don't have an address, you can create an Ethereum address from a number of different services, for example with MetaMask. Also, you will need a Nano address with Nano balance.

1. On the Kuyumcu main page, click the "SELL Nano" button.
2. Enter your USDC address that you want to receive coins to, and enter a Nano refund address, then click the "Continue" button.
3. You will be shown a Nano address. From your Nano wallet, send a Nano amount that you want to exchange with USDC. The amount you send must be between the specified minimum and maximum amounts.
4. Press the "Submit" button to finalize the transaction.
5. On the final screen, you will see the USDC amount you've bought and the exchange rate. You can click the "Transaction" link to see the transaction on the blockchain.

Yes! You can access it using the /api URL. You can see a simple example Python code that get prices using the API and automates Kuyumcu transactions here: github.com/nano-trade/API.