diff --git a/blockchain_integration/pi_network/pi-network-interoperability/bridge-contracts/polkadot/PolkadotTreasuryContract.js b/blockchain_integration/pi_network/pi-network-interoperability/bridge-contracts/polkadot/PolkadotTreasuryContract.js
new file mode 100644
index 000000000..53a30778a
--- /dev/null
+++ b/blockchain_integration/pi_network/pi-network-interoperability/bridge-contracts/polkadot/PolkadotTreasuryContract.js
@@ -0,0 +1,50 @@
+const Web3 = require('web3');
+const Ethers = require('ethers');
+const { ApiPromise, WsProvider } = require('@polkadot/api');
+
+class PolkadotTreasuryContract {
+  constructor(polkadotTreasuryContractAddress, providerUrl) {
+    this.polkadotTreasuryContractAddress = polkadotTreasuryContractAddress;
+    this.web3 = new Web3(new Web3.providers.HttpProvider(providerUrl));
+    this.ethersProvider = new Ethers.providers.JsonRpcProvider(providerUrl);
+    this.api = new ApiPromise({
+      provider: new WsProvider(providerUrl)
+    });
+  }
+
+  async proposeSpend(proposalId, amount) {
+    const txCount = await this.web3.eth.getTransactionCount(this.polkadotTreasuryContractAddress);
+    const tx = {
+      from: this.polkadotTreasuryContractAddress,
+      to: this.polkadotTreasuryContractAddress,
+      value: amount,
+      gas: '20000',
+      gasPrice: '20',
+      nonce: txCount,
+      data: `0x${proposalId.toString(16)}`
+    };
+    const signedTx = await this.ethersProvider.signTransaction(tx, '0x1234567890abcdef');
+    await this.ethersProvider.sendTransaction(signedTx);
+  }
+
+  async approveSpend(proposalId) {
+    const txCount = await this.web3.eth.getTransactionCount(this.polkadotTreasuryContractAddress);
+    const tx = {
+      from: this.polkadotTreasuryContractAddress,
+      to: this.polkadotTreasuryContractAddress,
+      value: '0',
+      gas: '20000',
+      gasPrice: '20',
+      nonce: txCount,
+      data: `0x${proposalId.toString(16)}`
+    };
+    const signedTx = await this.ethersProvider.signTransaction(tx, '0x1234567890abcdef');
+    await this.ethersProvider.sendTransaction(signedTx);
+  }
+
+  async getTreasuryBalance() {
+    return this.api.query.treasury.balance();
+  }
+}
+
+module.exports = PolkadotTreasuryContract;