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ContractKit has been sunset for external use. Please use viem or wagmi for connecting with the blockchain.Check out the migration guide for updating your dapp from ContractKit to viem.To learn more visit the Celo forum.
An account may register a data encryption key (DEK) that can be used for lightweight signing or encryption operations. Some examples of DEK usage are:
  1. Supporting private payment comments between two users
  2. Signing authentication headers to the Oblivious Decentralized Identifier Service
  3. Sharing profile picture and name privately between two users
Most Valora users automatically register a DEK with their wallet when they go through the onboarding flow. The DEK can be set during account creation or registered after as follows: 
const accountWrapper: AccountsWrapper =
  await contractKit.contracts.getAccounts();
const setKeyTx = accountWrapper.setAccountDataEncryptionKey(dekPublicKey);
When using the DEK, it’s important to check that the DEK is the latest that’s registered for a user. This can be done by querying the account contract and comparing the resulting public key with the key that’s expected. 
  // Query the on-chain data encryption key for a user
  const accountWrapper: AccountsWrapper = await contractKit.contracts.getAccounts()
  const dataEncryptionKey = await accountWrapper.getDataEncryptionKey(address)
  // Check that this matches with the public key
  ...