createDataCommitment

Creates a cryptographic commitment to hide data, using the original data and a secret key. This is the first step in commit-reveal schemes.

The generated outCommitment hash does not reveal any information about the original data. The outNonce (number used once) and outTimestamp ensure the commitment is unique and protected against replay attacks.

Parameters

Parameter	Type	Description
data	const String&	The original data to be committed/hidden.
secret	const String&	A secret key used to secure the commitment.
outCommitment	String&	Output: The resulting commitment hash (hex format).
outNonce	String&	Output: The randomly generated nonce used for the commitment.
outTimestamp	uint64_t&	Output: The timestamp used for the commitment.

Return Value

• bool: Returns true if the commitment was created successfully, false otherwise.

Example Code (main.cpp)

#include <Arduino.h>
#include "Infratic-lib.h"

// This function does not require network connectivity.
Infratic solana(""); // RPC URL not needed

void setup() {
    Serial.begin(115200);
    delay(1000);

    Serial.println("\n=== createDataCommitment Example ===");

    String dataToCommit = "sensor_reading:25.5C";
    String mySecret = "myUltraSecureSecretKey123";

    String commitment;
    String nonce;
    uint64_t timestamp;

    if (solana.createDataCommitment(dataToCommit, mySecret, commitment, nonce, timestamp)) {
        Serial.println("✅ Data commitment created successfully!");
        Serial.println("   -> Data: " + dataToCommit);
        Serial.println("   -> Secret: " + mySecret);
        Serial.println("-------------------------------------");
        Serial.println("   -> Commitment: " + commitment);
        Serial.println("   -> Nonce: " + nonce);
        Serial.print("   -> Timestamp: ");
        Serial.println((unsigned long)timestamp);
        Serial.println("\nYou can now send this 'Commitment' value on-chain.");
    } else {
        Serial.println("❌ Failed to create data commitment.");
    }
}

void loop() {
    // Can be left empty
}