Smart Contracts

recordConsent()

Records a new consent entry

1function recordConsent(
2    string memory anonymousId,
3    string memory hcsTopicId,
4    bytes32 dataHash
5) public

Parameters:

• anonymousId: Anonymous patient identifier (e.g., "PID-001")
• hcsTopicId: Hedera Consensus Service topic ID
• dataHash: Cryptographic hash of the anonymized dataset

revokeConsent()

Revokes a previously recorded consent

1function revokeConsent(
2    string memory anonymousId,
3    bytes32 dataHash
4) public

Marks a consent as revoked, preventing future data access for that record.

isConsentValid()

Checks if a consent is valid

1function isConsentValid(
2    string memory anonymousId,
3    bytes32 dataHash
4) public view returns (bool)

Returns true if consent exists and is not revoked, false otherwise.

getConsentByAnonymousId()

Retrieves consent information

1function getConsentByAnonymousId(
2    string memory anonymousId
3) public view returns (Consent memory)

Returns the complete consent record including HCS topic ID, data hash, timestamp, and status.

receive()

Automatically distributes received HBAR

1receive() external payable {
2    // Automatically splits incoming HBAR:
3    // 60% to patient accounts
4    // 25% to hospital accounts
5    // 15% to platform account
6}

This function is called automatically when HBAR is sent to the contract. It distributes the payment according to the configured split percentages.

distributeRevenueTo()

Manually distribute revenue to specific recipients

1function distributeRevenueTo(
2    address patientAccount,
3    address hospitalAccount,
4    uint256 totalAmount
5) public

Allows manual distribution with specific account addresses. Calculates split amounts based on configured percentages.

getSplitPercentages()

Returns the current revenue split configuration

1function getSplitPercentages() 
2    public 
3    view 
4    returns (
5        uint256 patientPercent,
6        uint256 hospitalPercent,
7        uint256 platformPercent
8    )

Returns the configured percentages: 60% patient, 25% hospital, 15% platform.