diff --git a/.env.sample b/.env.sample
index ab48665..018a382 100644
--- a/.env.sample
+++ b/.env.sample
@@ -3,8 +3,9 @@ VITE_RPC_URL=""
 VITE_API_BASE_URL="https://florin.bitcoinos.build"
 VITE_EXPIRATION_HOURS=24
 VITE_MIN_AMOUNT="0.0004"
-VITE_MAX_AMOUT="3"
+VITE_MAX_AMOUNT="3"
 VITE_EVM_CONFIRMATIONS_LOW=1
 VITE_EVM_CONFIRMATIONS_HIGH=10
 VITE_EVM_CONFIRMATIONS_USD_AMOUNT=100
-VITE_BTC_CONFIRMATIONS=6
\ No newline at end of file
+VITE_BTC_CONFIRMATIONS=6
+VITE_DEFAULT_POSITION_ID=
\ No newline at end of file
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index b92e82c..6d23bbf 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -41,6 +41,7 @@ jobs:
           VITE_EVM_CONFIRMATIONS_HIGH: ${{ secrets.VITE_EVM_CONFIRMATIONS_HIGH }}
           VITE_EVM_CONFIRMATIONS_USD_AMOUNT: ${{ secrets.VITE_EVM_CONFIRMATIONS_USD_AMOUNT }}
           VITE_BTC_CONFIRMATIONS: ${{ secrets.VITE_BTC_CONFIRMATIONS }}
+          VITE_DEFAULT_POSITION_ID: ${{ secrets.VITE_DEFAULT_POSITION_ID }}
 
       - name: Build
         run: npm run build
@@ -54,4 +55,5 @@ jobs:
           VITE_EVM_CONFIRMATIONS_LOW: ${{ secrets.VITE_EVM_CONFIRMATIONS_LOW }}
           VITE_EVM_CONFIRMATIONS_HIGH: ${{ secrets.VITE_EVM_CONFIRMATIONS_HIGH }}
           VITE_EVM_CONFIRMATIONS_USD_AMOUNT: ${{ secrets.VITE_EVM_CONFIRMATIONS_USD_AMOUNT }}
-          VITE_BTC_CONFIRMATIONS: ${{ secrets.VITE_BTC_CONFIRMATIONS }}
\ No newline at end of file
+          VITE_BTC_CONFIRMATIONS: ${{ secrets.VITE_BTC_CONFIRMATIONS }}
+          VITE_DEFAULT_POSITION_ID: ${{ secrets.VITE_DEFAULT_POSITION_ID }}
\ No newline at end of file
diff --git a/.github/workflows/deploy.yml b/.github/workflows/deploy.yml
index ee611ed..bebd886 100644
--- a/.github/workflows/deploy.yml
+++ b/.github/workflows/deploy.yml
@@ -42,6 +42,7 @@ jobs:
           VITE_EVM_CONFIRMATIONS_HIGH: ${{ secrets.VITE_EVM_CONFIRMATIONS_HIGH }}
           VITE_EVM_CONFIRMATIONS_USD_AMOUNT: ${{ secrets.VITE_EVM_CONFIRMATIONS_USD_AMOUNT }}
           VITE_BTC_CONFIRMATIONS: ${{ secrets.VITE_BTC_CONFIRMATIONS }}
+          VITE_DEFAULT_POSITION_ID: ${{ secrets.VITE_DEFAULT_POSITION_ID }}
       - name: Deploy to Netlify
         run: |
           DEPLOY_COMMAND="netlify deploy \
diff --git a/README.md b/README.md
index 701807e..e84cc22 100644
--- a/README.md
+++ b/README.md
@@ -64,12 +64,53 @@ yarn preview
 The application uses environment variables for configuration. Create a `.env` file in the root directory with the following variables:
 
 ```env
+# WalletConnect project ID for wallet connection functionality
 VITE_WALLETCONNECT_PROJECT_ID=""
+
+# RPC URL for connecting to the Ethereum network
 VITE_RPC_URL=""
-VITE_API_BASE_URL=""
+
+# Base URL for the Florin API endpoints
+VITE_API_BASE_URL="https://florin.bitcoinos.build"
+
+# Number of hours until a transaction expires
 VITE_EXPIRATION_HOURS=24
+
+# Minimum amount allowed for transactions (in BTC)
+VITE_MIN_AMOUNT="0.0004"
+
+# Maximum amount allowed for transactions (in BTC)
+VITE_MAX_AMOUNT="3"
+
+# Number of confirmations required for low-value related to VITE_EVM_CONFIRMATIONS_USD_AMOUNT EVM transactions
+VITE_EVM_CONFIRMATIONS_LOW=1
+
+# Number of confirmations required for high-value EVM transactions
+VITE_EVM_CONFIRMATIONS_HIGH=10
+
+# USD amount threshold that determines when to use high confirmations
+VITE_EVM_CONFIRMATIONS_USD_AMOUNT=100
+
+# Number of confirmations required for Bitcoin transactions
+VITE_BTC_CONFIRMATIONS=6
+
+# Default position id for reservation
+VITE_DEFAULT_POSITION_ID=
 ```
 
+## Contract Addresses Configuration
+The application uses different contract addresses for different networks. These addresses are configured in `src/constants/contracts.ts`. To modify the contract addresses:
+
+1. Navigate to `src/constants/contracts.ts`
+2. Update the addresses in the `CONTRACTS_ADDRESS` object for the desired network:
+   - `ammExchange`: AMM Exchange contract address
+   - `marketMakerProxy`: Market Maker Proxy contract address
+   - `florinForwarder`: Florin Forwarder contract address
+   - `erc20BitSnark`: ERC20 BitSnark token contract address
+   - `contractRegistry`: Contract Registry address
+
+The file supports multiple networks, Sepolia testnet (chain ID: 11155111) and local development (chain ID: 31337).
+
 ## Main Scripts
 - `npm run dev` - Start development server
 - `npm run build` - Create production build
diff --git a/src/config/env.ts b/src/config/env.ts
index b5895d9..10f7d14 100644
--- a/src/config/env.ts
+++ b/src/config/env.ts
@@ -31,7 +31,10 @@ const envSchema = z.object({
   }),
   VITE_BTC_CONFIRMATIONS: z.string().transform((val) => Number(val)).refine((val) => val > 0, {
     message: 'VITE_BTC_CONFIRMATIONS must be greater than 0',
-  })
+  }),
+  VITE_DEFAULT_POSITION_ID: z.string().min(1, {
+    message: 'VITE_DEFAULT_POSITION_ID is required',
+  }),
 });
 
 const parsed = envSchema.safeParse(import.meta.env);
diff --git a/src/constants/index.ts b/src/constants/index.ts
index 92b40b4..e3fce42 100644
--- a/src/constants/index.ts
+++ b/src/constants/index.ts
@@ -1,6 +1,7 @@
+import { env } from "@/config/env";
 import { PositionStatus, ReservationStatus } from "@/types";
 
-export const DEFAULT_POSITION_ID = '0xf0e94d3b55389b66f693bf6a4ae0eec46a1e61342c9efeaa96ba6ada1d555ca2';
+export const DEFAULT_POSITION_ID = env.VITE_DEFAULT_POSITION_ID;
 export const ETHERSCAN_URL = 'https://sepolia.etherscan.io';
 export const BITCOIN_TESTNET_URL = 'https://mempool.space/testnet4';