IoT-Based Autonomous Pay-As-You-Go Payment System with the Contract Wallet

Algorithm 1

Whitelisting.

Input: user EOA, company EOA, and user signature
Output: none
(1)	Generate a hash (keccak256) of the company EOA
(2)	Decrypt the public key and EOA of the signer from the hash and user signature using ECDSA
(3)	if decrypted EOA = = user EOA then
(4)	Add company EOA to the whitelist
(5)	Emit the event
(6)	else
(7)	Error handling
(8)	end if