createTimestampedProof

Creates a timestamped proof demonstrating the existence of specific data (data) at a particular point in time.

This function combines the data with the current timestamp, computes a hash (outProof), and fetches the latest Solana outBlockhash. This blockhash serves as an on-chain anchor, proving the proof was created before that block.

Parameters

Parameter	Type	Description
data	const String&	The data to be timestamped.
outProof	String&	Output: The combined hash of data and timestamp.
outTimestamp	uint64_t&	Output: The Unix timestamp used when creating the proof.
outBlockhash	String&	Output: The latest Solana blockhash used as an anchor.

Return Value

• bool: Returns true if the proof is created and the blockhash is fetched successfully.

Example Code (main.cpp)

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

// --- WiFi Settings ---
const char* WIFI_SSID = "YOUR_WIFI_SSID";
const char* WIFI_PASSWORD = "YOUR_WIFI_PASSWORD";

// --- Solana Settings ---
const String SOLANA_RPC_URL = "[https://api.devnet.solana.com](https://api.devnet.solana.com)";
Infratic solana(SOLANA_RPC_URL);

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

    // Connect to WiFi
    Serial.print("Connecting to WiFi...");
    WiFi.begin(WIFI_SSID, WIFI_PASSWORD);
    while (WiFi.status() != WL_CONNECTED) {
        delay(500);
        Serial.print(".");
    }
    Serial.println("\n✅ WiFi connected!");

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

    String dataToTimestamp = "This document was created on 10/10/2025.";
    String proof;
    uint64_t timestamp;
    String blockhash;

    Serial.println("Creating timestamped proof and fetching blockhash from Solana...");

    if (solana.createTimestampedProof(dataToTimestamp, proof, timestamp, blockhash)) {
        Serial.println("✅ Timestamped proof created successfully!");
        Serial.println("   -> Proof (Hash): " + proof);
        Serial.print("   -> Timestamp: ");
        Serial.println((unsigned long)timestamp);
        Serial.println("   -> Solana Blockhash (Anchor): " + blockhash);
    } else {
        Serial.println("❌ Failed to create proof (Could not fetch blockhash).");
    }
}

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