diff --git a/contracts/StellarPay2.rs b/contracts/StellarPay2.rs
new file mode 100644
index 0000000..e7da138
--- /dev/null
+++ b/contracts/StellarPay2.rs
@@ -0,0 +1,94 @@
+#![no_std]
+use soroban_sdk::{contract, contracttype, contractimpl, Address, Env, Map, String, Symbol, Vec, Error};
+
+#[contracttype]
+pub enum DataKey {
+    Member(Address),
+    Group(Symbol),
+    Transaction(Address), // Modified to only use Address
+}
+
+#[contracttype]
+pub struct Member {
+    nickname: String,
+    address: Address,
+}
+
+#[contracttype]
+pub struct Group {
+    group_id: Symbol,
+    owner: Address,
+    members: Map<Address, i128>,
+}
+
+#[contracttype]
+pub struct Transaction {
+    user_id: Address,
+    group_id: Symbol,
+    amounts: Map<Address, i128>,
+    proof: String,
+    approvals: Vec<Address>,
+}
+
+#[contract]
+pub struct Contract;
+
+#[contractimpl]
+impl Contract {
+    // Member functions
+    pub fn set_member(env: Env, address: Address, nickname: String) {
+        let member = Member { nickname, address: address.clone() };
+        env.storage().instance().set(&DataKey::Member(address), &member);
+    }
+
+    pub fn get_member(env: Env, address: Address) -> Result<Member, Error> {
+        env.storage().instance().get(&DataKey::Member(address)).ok_or_else(|| Error::from_contract_error(1))
+    }
+
+    // Group functions
+    pub fn set_group(env: Env, group_id: Symbol, owner: Address, members: Map<Address, i128>) {
+        let group = Group { group_id: group_id.clone(), owner, members };
+        env.storage().instance().set(&DataKey::Group(group_id), &group);
+    }
+
+    pub fn get_group(env: Env, group_id: Symbol) -> Result<Group, Error> {
+        env.storage().instance().get(&DataKey::Group(group_id)).ok_or_else(|| Error::from_contract_error(2))
+    }
+
+    pub fn add_group_member(env: Env, group_id: Symbol, member_address: Address, balance: i128) -> Result<(), Error> {
+        let mut group: Group = env.storage().instance().get(&DataKey::Group(group_id.clone())).ok_or_else(|| Error::from_contract_error(2))?;
+        group.members.set(member_address, balance);
+        env.storage().instance().set(&DataKey::Group(group_id), &group);
+        Ok(())
+    }
+
+    pub fn update_group_member_balance(env: Env, group_id: Symbol, member_address: Address, new_balance: i128) -> Result<(), Error> {
+        let mut group: Group = env.storage().instance().get(&DataKey::Group(group_id.clone())).ok_or_else(|| Error::from_contract_error(2))?;
+        group.members.set(member_address, new_balance);
+        env.storage().instance().set(&DataKey::Group(group_id), &group);
+        Ok(())
+    }
+
+    // Transaction functions
+    pub fn set_transaction(env: Env, user_id: Address, group_id: Symbol, amounts: Map<Address, i128>, proof: String) {
+        let transaction = Transaction {
+            user_id: user_id.clone(),
+            group_id,
+            amounts,
+            proof,
+            approvals: Vec::new(&env),
+        };
+        env.storage().instance().set(&DataKey::Transaction(user_id), &transaction);
+    }
+
+    pub fn get_transaction(env: Env, user_id: Address) -> Result<Transaction, Error> {
+        env.storage().instance().get(&DataKey::Transaction(user_id)).ok_or_else(|| Error::from_contract_error(3))
+    }
+
+    pub fn add_approval(env: Env, user_id: Address, approver: Address) -> Result<(), Error> {
+        let mut transaction: Transaction = env.storage().instance().get(&DataKey::Transaction(user_id.clone())).ok_or_else(|| Error::from_contract_error(3))?;
+        transaction.approvals.push_back(approver);
+        env.storage().instance().set(&DataKey::Transaction(user_id), &transaction);
+        Ok(())
+    }
+}