Recommended Kernels List

This list of kernels consists of both on-chain and off-chain kernels.

Our developers at KRNL use this list during the testing period.

This list contains some of the example kernels.

Check out KRNL Platform for more details.

Keep in mind that some kernels such as kernel ID 93, 94, 95 are meant to be for testing data type in kernel responses.

Those kernels might not help with any security measure.

If you are trying to choose kernel(s) to implement with your smart contract, feel free to select the kernel ID(s) from the table below.

Kernel ID	Network	Description	Purposes	Response Type	Read More
337	Base Sepolia	Prohibited List	To prevent prohibited wallet address You can register your wallet address to be on prohibited list through Basescan	uint256	Click here
340	Base Sepolia	Trusted List	To allow only trusted wallet address You can register your wallet address to be on trusted list through Basescan	bool	Click here
875	Arbitrum Sepolia	Mock Oracle (no input)	To fetch the mock exchange rate of ETH to USD without providing any input parameter Return value is based on the block time when the function is being called	uint256	Click here
925	Arbitrum Sepolia	Mock Oracle (static value)	To fetch the mock exchange rate of ETH to USD without providing any input parameter To explore how you can use oracle value with your smart contract Return value is fixed at 3201	int256	Click here
971	Arbitrum Sepolia	Mock Oracle (static value)	Same as kernel 925 but in ABCcoin instead of Mock ETH To fetch the mock exchange rate of ABCcoin to USD without providing any input parameter To explore how you can use oracle value with your smart contract Return value is fixed at 3201	int256	Click here
341	Arbitrum Sepolia	Mock Oracle	Option 1: To fetch the mock exchange rate of ETH to USD Option 2: To fetch the mock exchange rate of BTC to USD Exchange rate from this kernel can be used in the smart contract (number)	uint256	Click here
347	Optimism Sepolia	Day and Time	To receive day of the week and time in HH:MM (GMT+0) Day of the week and current time can be used in the smart contract (string)	string	Click here
883	Sepolia	Mock KYC (score)	To implement and observe how KYC kernels work Anyone can define their own score which ranged between 0 to 100	uint256	Etherscan
90	Optimism Sepolia	Gitcoin Passport getScore	On-chain KYC	uint256	Optimism Etherscan
91	Optimism Sepolia	Gitcoin Passport isHuman	On-chain KYC	bool	Optimism Etherscan
92	off-chain	Mock API for getting random values (for testing)	For testing	{ "walletAddress": "0x123", "name": "bypass", "walletScoreString": "8", "decimalString": "672.80", "isFlag": false, "integerNumber": 78936, "decimalNumber": 91025.53, "id": "1" }
93, 94, 95, 96, 97, 98	Optimism Sepolia	MultiView (for testing)	For testing	depends on the function	Optimism Etherscan