Listing 3. Pseudocode for consent for uploaded documents.

// Define the structure for a participant struct Participant {    bool registered;    bool approved; } // Contract state enum ContractState {   Created,   WaitForApproversSignature,   Reverted } # Define contract states class ContractState:   WaitingForApproversSignature = "WaitingForApproversSignature"   SignatureProvided = "SignatureProvided"   SignatureDenied = "SignatureDenied" # Define participant states class ParticipantState:   ReadyToSubmit = "ReadyToSubmit"   ApprovalProvided = "ApprovalProvided"   ApprovalNotProvided = "ApprovalNotProvided" # Define approver states class ApproversState:   WaitingToSign = "WaitingToSign"   ApprovalSuccess = "ApprovalSuccess"   ApprovalFailed = "ApprovalFailed" def validateParticipant(participantAddress, documentHash, IPFSHash):    contractState = ContractState.WaitingForApproversSignature    participantState = ParticipantState.ReadyToSubmit    approversState = ApproversState.WaitingToSign    if participantAddress in RegisteredParticipantSet:         restrictAccessToParticipant(participantAddress)         if documentHash == IPFSHash:             contractState = ContractState.SignatureProvided             participantState = ParticipantState.ApprovalProvided             approversState = ApproversState.ApprovalSuccess             createValidationMessage("Request ID granted")         else:             contractState = ContractState.SignatureDenied             participantState = ParticipantState.ApprovalNotProvided             approversState = ApproversState.ApprovalFailed             createValidationMessage("Document version approval failed")    else:         revertContractState("Participant is not registered") def restrictAccessToParticipant(participantAddress):    # Restrict access to only the specified participant    pass def createValidationMessage(message):    # Create a validation message with the given content    pass def revertContractState(error):    # Revert contract state and show error message    pass