Registration Using Remix

Bridge KIP-7 (fungible token, original token on KLAYTN) to another chain (Ethereum, Polygon, etc...)

This guide is based on the contract address and amount supplied. Take this guide as a reference and type in the exact numbers and address as told.

MetaMask

• Networks

KLAYTN : https://public-en-cypress.klaytn.net

• Add Network from the networks dropdown if needed

• Open Networks again and select the network you added

Remix IDE

Remix IDE - an online IDE to develop smart contracts.

• Docs

• Download abi files

801B

layer1.abi

222B

ft.abi

• Load abi files into Remix IDE

• Select ft.abi

• Approve Token

  • Select Deploy & Run Transaction on left bar

  • Select Injected Web3 for Environment

    • For Metamask

    • Check chainID (ex. KLAYTN : 8217)

  • Put your token address and Load Contract (ex. KSP : 0xc6a2ad8cc6e4a7e08fc37cc5954be07d499e7654)

  • Put spender and the amount to be bridged

    • In this case KLAYTN Layer 1 contract : 0x9Abc3F6c11dBd83234D6E6b2c373Dfc1893F648D

    • If your original token is on a chain other than KLAYTN, please refer to the Layer 1 contract addresses

  • Click transact button

Updated dropdown menu Select [Injected Provider - MetaMask]

• Send Transaction using Metamask

choose edit

edit gas fee

make sure priority fee and fee to 750

• Bridge Token

  • Load the Layer 1 contract referring to the Approve Token step

  • KLAYTN Layer 1 contract : 0x9Abc3F6c11dBd83234D6E6b2c373Dfc1893F648D

  • Get ChainId for toChain (Use MATIC for POLYGON due to predefined bridge rules)

  • Put chainId to check if toChain is a supported chain

  • Put chainId to check the bridge fee to toChain

    • If chainFee is zero, then value set 0

    • if not, you must put chainFee in VALUE. (ether = 10^18 wei)

  • Dropdown depositToken, fill params and click transact

    • token : your token address (ex. KSP : 0xc6a2ad8cc6e4a7e08fc37cc5954be07d499e7654)

    • toAddr : address for receive bridged token

    • amount : 1 (ex. 0.04 KSP = 40000000000000000, decimal = 18) Basically, you are sending the minimum amount to register the token, 1/10^18 since the contract is based on the standard of decimal 18

  • Send Transaction referring to the Send Transaction using Metamask step

  • You can check the bridged token by searching for toAddr in toChain's explorer

If the chainFee shows any gas fee, put the same amount in the GAS FEE value

When the transaction is completed, tochain's explorer shows the result as above