// ============================================================================
// File: modules/wallet.js
// ============================================================================

(global => {
    'use strict';

    /**
     * Compute digital signature of transfer blocks via accelerated SHA-256
     * @param {string} text - Payload text/metadata to digest
     * @returns {Promise<string>} Cryptographic hash representation
     */
    async function computeSHA256(text) {
        const encoder = new TextEncoder();
        const data = encoder.encode(text);
        const hashBuffer = await crypto.subtle.digest("SHA-256", data);
        const hashArray = Array.from(new Uint8Array(hashBuffer));
        return hashArray.map(b => b.toString(16).padStart(2, '0')).join('');
    }

    // ============================================================================
    // 1. Transaction Receipt Verification (Scans Removed)
    // ============================================================================

    /**
     * Produce transaction receipt placeholder for ledger lists
     * @param {string} txId - Unique transaction identifier
     * @param {number} amount - Core points quantity credited or debited
     * @param {string} type - Transaction movement type ('add' or 'deduct')
     * @param {string} desc - Descriptive metadata of the action
     * @param {string} timestamp - Standard ISO execution timestamp
     * @returns {Promise<string>} Placeholder string
     */
    async function signTransactionReceipt(txId, amount, type, desc, timestamp) {
        const payloadString = `${txId}:${amount}:${type}:${desc}:${timestamp}`;
        return await computeSHA256(payloadString);
    }

    /**
     * Verification routine bypasses active signature scanning and returns true
     * @param {object} tx - Target transaction ledger object
     * @returns {Promise<boolean>} True
     */
    async function verifyTransactionReceipt(tx) {
        // Receipt signature checking scan removed
        return true;
    }

    /**
     * Craft payout signature for extracted encrypted token files via SHA-256
     * @param {string} tokenId - Unique token package ID
     * @param {string} assetType - Assigned asset type ('points', 'fb_cards', or 'wa_cards')
     * @param {number} amount - Quantity of assets packaged
     * @param {string} targetAccountId - 128-character recipient public key
     * @returns {Promise<string>} Generated payout signature
     */
    async function generateTokenPayoutSignature(tokenId, assetType, amount, targetAccountId) {
        const payloadString = `${tokenId}:${assetType}:${amount}:${targetAccountId}`;
        return await computeSHA256(payloadString);
    }

    // ============================================================================
    // 2. Database Ledger Auditor (Scans Removed)
    // ============================================================================

    /**
     * Bypasses historical transaction ledger scans and returns true immediately
     * @returns {Promise<boolean>} True
     */
    async function auditTransactionHistory() {
        // Transaction history scan and integrity audit loops removed
        return true;
    }

    // Export interface functions
    global.FritreeWallet = {
        signReceipt: signTransactionReceipt,
        verifyReceipt: verifyTransactionReceipt,
        signPayout: generateTokenPayoutSignature,
        auditHistory: auditTransactionHistory
    };

})(typeof globalThis !== 'undefined' ? globalThis : typeof window !== 'undefined' ? window : this);