1. Currently, it is not possible to directly transfer cross-chain from the exchange to the Harmony chain, so the transfer needs to be done through the cross-chain bridge.
2. You can buy some BNB from the exchange as the transfer fee on the BNB Chain
MetaMask defaults to the Ethereum network configuration. So we will configure it to recognize the bsc network (also default Ethereum network configuration)
To manually add the Binance Smart Chain one–it doesn’t come packaged with MetaMask. It’s important to note that there are two networks we can use here: the test net or the main net. Below are the parameters to fill in for each.
3. After the network configuration is successful, you can purchase ONE and BNB on PancakeSwap. BNB will be used as the handling fee for the cross-chain bridge https://bridge.harmony.one/, and ONE will be used as the handling fee for Harmoney transfer/authorization and other operations.
To buy ONE tokens,
ONE's contract address on BSC: 0x03fF0ff224f904be3118461335064bB48Df47938
Authorize first, then click transaction to buy ONE