diff --git a/projects/DAPIO/chain-integration/integration.rs b/projects/DAPIO/chain-integration/integration.rs
new file mode 100644
index 000000000..f209980f7
--- /dev/null
+++ b/projects/DAPIO/chain-integration/integration.rs
@@ -0,0 +1,104 @@
+// Chain integration implementation
+
+use tokio::prelude::*;
+use serde::{Serialize, Deserialize};
+
+// Chain integration configuration
+#[derive(Debug, Serialize, Deserialize)]
+struct ChainIntegrationConfig {
+    pi_network_config: PiNetworkConfig,
+    ethereum_config: EthereumConfig,
+    binance_smart_chain_config: BinanceSmartChainConfig,
+    polkadot_config: PolkadotConfig,
+}
+
+// Chain integration implementation
+struct ChainIntegration {
+    pi_network: PiNetwork,
+    ethereum: Ethereum,
+    binance_smart_chain: BinanceSmartChain,
+    polkadot: Polkadot,
+}
+
+impl ChainIntegration {
+    async fn new(config: ChainIntegrationConfig) -> Result<Self, String> {
+        let pi_network = PiNetwork::new(config.pi_network_config).await?;
+        let ethereum = Ethereum::new(config.ethereum_config).await?;
+        let binance_smart_chain = BinanceSmartChain::new(config.binance_smart_chain_config).await?;
+        let polkadot = Polkadot::new(config.polkadot_config).await?;
+        Ok(Self {
+            pi_network,
+            ethereum,
+            binance_smart_chain,
+            polkadot,
+        })
+    }
+
+    async fn get_block_numbers(&self) -> Result<Vec<u64>, String> {
+        let mut block_numbers = Vec::new();
+        block_numbers.push(self.pi_network.get_block_number().await?);
+        block_numbers.push(self.ethereum.get_block_number().await?);
+        block_numbers.push(self.binance_smart_chain.get_block_number().await?);
+        block_numbers.push(self.polkadot.get_block_number().await?);
+        Ok(block_numbers)
+    }
+
+    async fn send_transactions(&self, txs: Vec<Transaction>) -> Result<Vec<String>, String> {
+        let mut tx_hashes = Vec::new();
+        for tx in txs {
+            tx_hashes.push(self.pi_network.send_transaction(&tx).await?);
+            tx_hashes.push(self.ethereum.send_transaction(&tx).await?);
+            tx_hashes.push(self.binance_smart_chain.send_transaction(&tx).await?);
+            tx_hashes.push(self.polkadot.send_transaction(&tx).await?);
+        }
+        Ok(tx_hashes)
+    }
+}
+
+// Example usage
+#[tokio::main]
+async fn main() {
+    let config = ChainIntegrationConfig {
+        pi_network_config: PiNetworkConfig {
+            node_url: "https://pi-network-node.com".to_string(),
+            api_key: "YOUR_API_KEY".to_string(),
+            api_secret: "YOUR_API_SECRET".to_string(),
+        },
+        ethereum_config: EthereumConfig {
+            node_url: "https://ethereum-node.com".to_string(),
+            api_key: "YOUR_API_KEY".to_string(),
+            api_secret: "YOUR_API_SECRET".to_string(),
+        },
+        binance_smart_chain_config: BinanceSmartChainConfig {
+            node_url: "https://binance-smart-chain-node.com".to_string(),
+            api_key: "YOUR_API_KEY".to_string(),
+            api_secret: "YOUR_API_SECRET".to_string(),
+        },
+        polkadot_config: PolkadotConfig {
+            node_url: "https://polkadot-node.com".to_string(),
+            api_key: "YOUR_API_KEY".to_string(),
+            api_secret: "YOUR_API_SECRET".to_string(),
+        },
+    };
+    let chain_integration = ChainIntegration::new(config).await.unwrap();
+    let block_numbers = chain_integration.get_block_numbers().await.unwrap();
+    println!("Block numbers: {:?}", block_numbers);
+    let txs = vec![
+        Transaction {
+            from: "0x1234567890abcdef".to_string(),
+            to: "0xfedcba9876543210".to_string(),
+            value: 100,
+            gas: 20000,
+            gas_price: 20,
+        },
+        Transaction {
+            from: "0xfedcba9876543210".to_string(),
+            to: "0x1234567890abcdef".to_string(),
+            value: 50,
+            gas: 15000,
+            gas_price: 15,
+        },
+    ];
+    let tx_hashes = chain_integration.send_transactions(txs).await.unwrap();
+    println!("Transaction hashes: {:?}", tx_hashes);
+}