Monadic-DNA · vishakh · Feb 3, 2026 · Feb 3, 2026 · Feb 3, 2026 · Feb 5, 2026
diff --git a/.env.local.example b/.env.local.example
@@ -32,54 +32,27 @@ ALCHEMY_API_KEY=your_alchemy_api_key
 # IMPORTANT: Set this in your .env.local for development!
 NEXT_PUBLIC_ENABLE_TESTNET_CHAINS=false
 
-# EVM payment wallet address (same address used across all EVM chains)
-# This is where users send their stablecoin payments on Ethereum, Base, Arbitrum, Optimism, Polygon
+# EVM payment wallet address (used for Ethereum mainnet payments)
+# This is where users send their stablecoin payments on Ethereum mainnet
 # NEXT_PUBLIC_ prefix is required because it's displayed in the browser UI
 # Format: 0x... (42 characters, EVM address)
 # Note: For future non-EVM chains (Solana, Monad, etc.), add separate variables like:
 #       NEXT_PUBLIC_SOLANA_PAYMENT_WALLET_ADDRESS, NEXT_PUBLIC_MONAD_PAYMENT_WALLET_ADDRESS
 NEXT_PUBLIC_EVM_PAYMENT_WALLET_ADDRESS=0x0000000000000000000000000000000000000000
 
-# Stablecoin contract addresses (standard addresses, don't change unless deploying new token)
+# Stablecoin contract addresses (standard addresses for Ethereum mainnet)
 
-# USDC contracts
+# USDC contract (Ethereum mainnet)
 USDC_CONTRACT_ETHEREUM=0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48
-USDC_CONTRACT_BASE=0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913
-USDC_CONTRACT_ARBITRUM=0xaf88d065e77c8cC2239327C5EDb3A432268e5831
-USDC_CONTRACT_OPTIMISM=0x0b2C639c533813f4Aa9D7837CAf62653d097Ff85
-USDC_CONTRACT_POLYGON=0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359
-
 NEXT_PUBLIC_USDC_CONTRACT_ETHEREUM=0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48
-NEXT_PUBLIC_USDC_CONTRACT_BASE=0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913
-NEXT_PUBLIC_USDC_CONTRACT_ARBITRUM=0xaf88d065e77c8cC2239327C5EDb3A432268e5831
-NEXT_PUBLIC_USDC_CONTRACT_OPTIMISM=0x0b2C639c533813f4Aa9D7837CAf62653d097Ff85
-NEXT_PUBLIC_USDC_CONTRACT_POLYGON=0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359
 
-# USDT contracts
+# USDT contract (Ethereum mainnet)
 USDT_CONTRACT_ETHEREUM=0xdAC17F958D2ee523a2206206994597C13D831ec7
-USDT_CONTRACT_BASE=0xfde4C96c8593536E31F229EA8f37b2ADa2699bb2
-USDT_CONTRACT_ARBITRUM=0xFd086bC7CD5C481DCC9C85ebE478A1C0b69FCbb9
-USDT_CONTRACT_OPTIMISM=0x94b008aA00579c1307B0EF2c499aD98a8ce58e58
-USDT_CONTRACT_POLYGON=0xc2132D05D31c914a87C6611C10748AEb04B58e8F
-
 NEXT_PUBLIC_USDT_CONTRACT_ETHEREUM=0xdAC17F958D2ee523a2206206994597C13D831ec7
-NEXT_PUBLIC_USDT_CONTRACT_BASE=0xfde4C96c8593536E31F229EA8f37b2ADa2699bb2
-NEXT_PUBLIC_USDT_CONTRACT_ARBITRUM=0xFd086bC7CD5C481DCC9C85ebE478A1C0b69FCbb9
-NEXT_PUBLIC_USDT_CONTRACT_OPTIMISM=0x94b008aA00579c1307B0EF2c499aD98a8ce58e58
-NEXT_PUBLIC_USDT_CONTRACT_POLYGON=0xc2132D05D31c914a87C6611C10748AEb04B58e8F
 
-# DAI contracts
+# DAI contract (Ethereum mainnet)
 DAI_CONTRACT_ETHEREUM=0x6B175474E89094C44Da98b954EedeAC495271d0F
-DAI_CONTRACT_BASE=0x50c5725949A6F0c72E6C4a641F24049A917DB0Cb
-DAI_CONTRACT_ARBITRUM=0xDA10009cBd5D07dd0CeCc66161FC93D7c9000da1
-DAI_CONTRACT_OPTIMISM=0xDA10009cBd5D07dd0CeCc66161FC93D7c9000da1
-DAI_CONTRACT_POLYGON=0x8f3Cf7ad23Cd3CaDbD9735AFf958023239c6A063
-
 NEXT_PUBLIC_DAI_CONTRACT_ETHEREUM=0x6B175474E89094C44Da98b954EedeAC495271d0F
-NEXT_PUBLIC_DAI_CONTRACT_BASE=0x50c5725949A6F0c72E6C4a641F24049A917DB0Cb
-NEXT_PUBLIC_DAI_CONTRACT_ARBITRUM=0xDA10009cBd5D07dd0CeCc66161FC93D7c9000da1
-NEXT_PUBLIC_DAI_CONTRACT_OPTIMISM=0xDA10009cBd5D07dd0CeCc66161FC93D7c9000da1
-NEXT_PUBLIC_DAI_CONTRACT_POLYGON=0x8f3Cf7ad23Cd3CaDbD9735AFf958023239c6A063
 
 # Sepolia Testnet (DEV MODE ONLY - NODE_ENV=development)
 # Get testnet tokens from Sepolia faucets (see STABLECOIN_PAYMENTS.md)

diff --git a/STABLECOIN_PAYMENTS.md b/STABLECOIN_PAYMENTS.md
@@ -23,7 +23,7 @@ Monadic DNA Explorer Premium now uses a **database-free, stablecoin-based paymen
        │
        ▼
 ┌─────────────┐
-│ Blockchain  │ Ethereum, Base, Arbitrum, Optimism, Polygon
+│ Blockchain  │ Ethereum mainnet
 │ Transaction │ Stablecoin transfer
 └──────┬──────┘
        │
@@ -73,17 +73,13 @@ NEXT_PUBLIC_DYNAMIC_ENVIRONMENT_ID=your_dynamic_environment_id
 
 ### 2. Supported Chains
 
-The system supports 5 EVM chains (production):
-- **Ethereum**
-- **Base**
-- **Arbitrum**
-- **Optimism**
-- **Polygon**
+The system supports **Ethereum mainnet** only (no L2 networks):
+- **Ethereum** (L1)
 
 The system also supports **Sepolia testnet** when explicitly enabled:
 - **Sepolia** (Ethereum testnet) - Enable by setting `NEXT_PUBLIC_ENABLE_TESTNET_CHAINS=true` in `.env.local`
 
-**USDC**, **USDT**, and **DAI** are accepted on all chains.
+**USDC**, **USDT**, and **DAI** are accepted on Ethereum mainnet.
 
 ### 3. Pricing Model
 
@@ -270,7 +266,6 @@ If you were using the old Paddle + Database system:
 Potential improvements:
 - [ ] Add email notifications when subscription expires
 - [ ] Add QR code for mobile wallet payments
-- [ ] Support more chains (Polygon, Avalanche, etc.)
 - [ ] Add token price charts in UI
 - [ ] Add refund mechanism (for accidental overpayments)
 

diff --git a/app/api/nilai-delegation/route.ts b/app/api/nilai-delegation/route.ts
@@ -1,5 +1,5 @@
 import { NextRequest, NextResponse } from 'next/server';
-import { DelegationTokenServer, NilAuthInstance } from '@nillion/nilai-ts';
+import { DelegationTokenServer } from '@nillion/nilai-ts';
 import { validateOrigin } from '@/lib/origin-validator';
 
 // Simple in-memory rate limiter
@@ -97,7 +97,6 @@ export async function POST(request: NextRequest) {
 
     // Create delegation token server
     const server = new DelegationTokenServer(apiKey, {
-      nilauthInstance: NilAuthInstance.PRODUCTION,
       expirationTime: 600, // 10 minutes validity
       tokenMaxUses: 1 // Single use for privacy (fresh token fetched per message)
     });

diff --git a/app/api/nildb-delegation/route.ts b/app/api/nildb-delegation/route.ts
diff --git a/app/api/study-metadata/route.ts b/app/api/study-metadata/route.ts
@@ -30,7 +30,7 @@ export async function GET(request: NextRequest) {
         date,
         journal
       FROM gwas_catalog
-      WHERE id = ?
+      WHERE id = $1
     `;
 
     const metadata = await executeQuerySingle<{

diff --git a/app/components/MenuBar.tsx b/app/components/MenuBar.tsx
@@ -288,17 +288,6 @@ export default function MenuBar() {
             <span className="label">Help</span>
           </button>
 
-          <button
-            className="menu-icon-button"
-            onClick={() => setShowNillionModal(true)}
-            title="x Nillion: Test your crypto degen score"
-          >
-            <span className="icon">
-              <NillionIcon size={32} />
-            </span>
-            <span className="label">x Nillion</span>
-          </button>
-
           {mounted && (
             <button
               className="menu-icon-button"

diff --git a/app/components/NillionModal.tsx b/app/components/NillionModal.tsx
@@ -112,6 +112,10 @@ export default function NillionModal({ isOpen, onClose }: NillionModalProps) {
 
       setCalculationStep('Storing results in nilDB...');
 
+      // nilDB functionality temporarily disabled - packages under migration
+      throw new Error('nilDB storage is temporarily unavailable during package migration');
+
+      /* DISABLED - nilDB code under migration
       // Import nilDB client libraries dynamically (client-side only)
       const { Signer } = await import('@nillion/nuc');
       const { SecretVaultUserClient } = await import('@nillion/secretvaults');
@@ -174,6 +178,7 @@ export default function NillionModal({ isOpen, onClose }: NillionModalProps) {
       );
 
       console.log('Successfully stored in nilDB:', record._id);
+      */
 
     } catch (error) {
       // Throw error to make nilDB failures visible

diff --git a/app/components/PaymentModal.tsx b/app/components/PaymentModal.tsx
@@ -3,7 +3,7 @@
 import { useState, useEffect } from 'react';
 import { useDynamicContext } from '@dynamic-labs/sdk-react-core';
 import { parseUnits, encodeFunctionData, createPublicClient, http, formatUnits } from 'viem';
-import { mainnet, base, arbitrum, optimism, polygon, sepolia } from 'viem/chains';
+import { mainnet, sepolia } from 'viem/chains';
 import { verifyPromoCode } from '@/lib/prime-verification';
 import { setPromoAccess } from '@/lib/promo-access';
 import StripeSubscriptionForm from './StripeSubscriptionForm';
@@ -39,10 +39,6 @@ export default function PaymentModal({ isOpen, onClose, onSuccess }: PaymentModa
   // Block explorer URLs for each chain
   const BLOCK_EXPLORERS: Record<string, string> = {
     'Ethereum': 'https://etherscan.io',
-    'Base': 'https://basescan.org',
-    'Arbitrum One': 'https://arbiscan.io',
-    'OP Mainnet': 'https://optimistic.etherscan.io',
-    'Polygon': 'https://polygonscan.com',
     'Sepolia': 'https://sepolia.etherscan.io',
   };
 
@@ -53,32 +49,20 @@ export default function PaymentModal({ isOpen, onClose, onSuccess }: PaymentModa
 
   const USDC_CONTRACTS: Record<string, string> = {
     'Ethereum': process.env.NEXT_PUBLIC_USDC_CONTRACT_ETHEREUM || '0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48',
-    'Base': process.env.NEXT_PUBLIC_USDC_CONTRACT_BASE || '0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913',
-    'Arbitrum One': process.env.NEXT_PUBLIC_USDC_CONTRACT_ARBITRUM || '0xaf88d065e77c8cC2239327C5EDb3A432268e5831',
-    'OP Mainnet': process.env.NEXT_PUBLIC_USDC_CONTRACT_OPTIMISM || '0x0b2C639c533813f4Aa9D7837CAf62653d097Ff85',
-    'Polygon': process.env.NEXT_PUBLIC_USDC_CONTRACT_POLYGON || '0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359',
     ...(testnetEnabled ? {
       'Sepolia': process.env.NEXT_PUBLIC_USDC_CONTRACT_SEPOLIA || '0x1c7D4B196Cb0C7B01d743Fbc6116a902379C7238',
     } : {}),
   };
 
   const USDT_CONTRACTS: Record<string, string> = {
     'Ethereum': process.env.NEXT_PUBLIC_USDT_CONTRACT_ETHEREUM || '0xdAC17F958D2ee523a2206206994597C13D831ec7',
-    'Base': process.env.NEXT_PUBLIC_USDT_CONTRACT_BASE || '0xfde4C96c8593536E31F229EA8f37b2ADa2699bb2',
-    'Arbitrum One': process.env.NEXT_PUBLIC_USDT_CONTRACT_ARBITRUM || '0xFd086bC7CD5C481DCC9C85ebE478A1C0b69FCbb9',
-    'OP Mainnet': process.env.NEXT_PUBLIC_USDT_CONTRACT_OPTIMISM || '0x94b008aA00579c1307B0EF2c499aD98a8ce58e58',
-    'Polygon': process.env.NEXT_PUBLIC_USDT_CONTRACT_POLYGON || '0xc2132D05D31c914a87C6611C10748AEb04B58e8F',
     ...(testnetEnabled ? {
       'Sepolia': process.env.NEXT_PUBLIC_USDT_CONTRACT_SEPOLIA || '0xaA8E23Fb1079EA71e0a56F48a2aA51851D8433D0',
     } : {}),
   };
 
   const DAI_CONTRACTS: Record<string, string> = {
     'Ethereum': process.env.NEXT_PUBLIC_DAI_CONTRACT_ETHEREUM || '0x6B175474E89094C44Da98b954EedeAC495271d0F',
-    'Base': process.env.NEXT_PUBLIC_DAI_CONTRACT_BASE || '0x50c5725949A6F0c72E6C4a641F24049A917DB0Cb',
-    'Arbitrum One': process.env.NEXT_PUBLIC_DAI_CONTRACT_ARBITRUM || '0xDA10009cBd5D07dd0CeCc66161FC93D7c9000da1',
-    'OP Mainnet': process.env.NEXT_PUBLIC_DAI_CONTRACT_OPTIMISM || '0xDA10009cBd5D07dd0CeCc66161FC93D7c9000da1',
-    'Polygon': process.env.NEXT_PUBLIC_DAI_CONTRACT_POLYGON || '0x8f3Cf7ad23Cd3CaDbD9735AFf958023239c6A063',
     ...(testnetEnabled ? {
       'Sepolia': process.env.NEXT_PUBLIC_DAI_CONTRACT_SEPOLIA || '0xFF34B3d4Aee8ddCd6F9AFFFB6Fe49bD371b8a357',
     } : {}),
@@ -87,10 +71,6 @@ export default function PaymentModal({ isOpen, onClose, onSuccess }: PaymentModa
   // Map chain names to viem chain objects
   const CHAIN_MAP: Record<string, any> = {
     'Ethereum': mainnet,
-    'Base': base,
-    'Arbitrum One': arbitrum,
-    'OP Mainnet': optimism,
-    'Polygon': polygon,
     ...(testnetEnabled ? {
       'Sepolia': sepolia,
     } : {}),