diff --git a/src/_tests/unit/mockProvider.ts b/src/_tests/unit/mockProvider.ts
index 5045f95f..fb9723f8 100644
--- a/src/_tests/unit/mockProvider.ts
+++ b/src/_tests/unit/mockProvider.ts
@@ -30,6 +30,8 @@ export class MockProvider implements Provider {
     private _balances: Map<string, bigint> = new Map();
     private _lockedBalances: Map<string, bigint> = new Map();
     private _outpoints: Map<string, Array<Outpoint>> = new Map();
+    private _estimateFeeForQi: Map<string, number> = new Map();
+    private _signedTransaction: string = '';
     private _eventHandlers: Map<
         string,
         Array<{
@@ -47,11 +49,31 @@ export class MockProvider implements Provider {
         if (config?.blockNumber) this._blockNumber = config.blockNumber;
     }
 
-    // Helper methods to set up test state
+    // Helper methods to set the balanace of an address
     public setBalance(address: string, balance: bigint): void {
         this._balances.set(address.toLowerCase(), balance);
     }
 
+    // mock getBalance method
+    async getBalance(address: AddressLike, blockTag?: BlockTag): Promise<bigint> {
+        return this._balances.get(address.toString().toLowerCase()) ?? BigInt(0);
+    }
+
+    // helper method to set the estimated Qi fee for a transaction in the mock provider
+    public setEstimateFeeForQi(input: QiPerformActionTransaction, output: number): void {
+        const key = JSON.stringify(input, bigIntSerializer);
+        this._estimateFeeForQi.set(key, output);
+    }
+
+    // mock estimateFeeForQi method
+    async estimateFeeForQi(input: QiPerformActionTransaction): Promise<bigint> {
+        const key = JSON.stringify(input, bigIntSerializer);
+
+        const fee = this._estimateFeeForQi.get(key) ?? 0;
+        return BigInt(fee);
+    }
+
+    // Helper methods to set the transaction to be used by the mock provider
     public setTransaction(hash: string, tx: TransactionResponse): void {
         this._transactions.set(hash.toLowerCase(), tx);
     }
@@ -60,11 +82,17 @@ export class MockProvider implements Provider {
         this._outpoints.set(address.toLowerCase(), outpoints);
     }
 
-    // Implementation of Provider interface methods
+    // Helper methods to set the network to be used by the mock provider
+    public setNetwork(network: Network): void {
+        this._network = network;
+    }
+
+    // mock getNetwork method
     async getNetwork(): Promise<Network> {
         return this._network;
     }
 
+    // Helper methods to set the block number to be used by the mock provider
     public setBlock(key: string, block: Block): void {
         this._blocks.set(key, block);
     }
@@ -81,11 +109,13 @@ export class MockProvider implements Provider {
         return this._blockNumber;
     }
 
-    async getBalance(address: AddressLike, blockTag?: BlockTag): Promise<bigint> {
-        return this._balances.get(address.toString().toLowerCase()) ?? BigInt(0);
+    // helper method to inspect the signed transaction sent to the mock provider
+    public getSignedTransaction(): string {
+        return this._signedTransaction;
     }
 
     async broadcastTransaction(zone: Zone, signedTx: string, from?: AddressLike): Promise<TransactionResponse> {
+        this._signedTransaction = signedTx;
         // Simulate transaction broadcast
         const type = decodeProtoTransaction(getBytes(signedTx)).type;
 
@@ -109,11 +139,6 @@ export class MockProvider implements Provider {
         return this._outpoints.get(address.toString().toLowerCase()) ?? [];
     }
 
-    async estimateFeeForQi(tx: QiPerformActionTransaction): Promise<bigint> {
-        // Return a mock fee for testing
-        return BigInt(1000);
-    }
-
     async on(event: ProviderEvent, listener: Listener, zone?: Zone): Promise<this> {
         const eventKey = this._getEventKey(event, zone);
         if (!this._eventHandlers.has(eventKey)) {
@@ -307,3 +332,16 @@ export class MockProvider implements Provider {
         throw new Error('getLatestQuaiRate: Method not implemented.');
     }
 }
+
+function bigIntSerializer(key: string, value: any): any {
+    // Handle null/undefined explicitly
+    if (value === null || value === undefined) {
+        return value;
+    }
+    // Handle bigint values
+    if (typeof value === 'bigint') {
+        return value.toString();
+    }
+    // Return other values unchanged
+    return value;
+}
diff --git a/src/_tests/unit/qihdwallet-scan-and-send.unit.test.ts b/src/_tests/unit/qihdwallet-scan-and-send.unit.test.ts
new file mode 100644
index 00000000..43750565
--- /dev/null
+++ b/src/_tests/unit/qihdwallet-scan-and-send.unit.test.ts
@@ -0,0 +1,186 @@
+import assert from 'assert';
+import { loadTests } from '../utils.js';
+import {
+    Mnemonic,
+    QiHDWallet,
+    Zone,
+    OutpointInfo,
+    Block,
+    QiAddressInfo,
+    Network,
+    QiTransaction,
+    getBytes,
+} from '../../index.js';
+import { Outpoint } from '../../transaction/utxo.js';
+import { QiPerformActionTransaction } from '../../providers/abstract-provider.js';
+import { MockProvider } from './mockProvider.js';
+import { schnorr } from '@noble/curves/secp256k1';
+
+process.on('unhandledRejection', (reason, promise) => {
+    console.error('Unhandled Rejection at:', promise, 'reason:', reason);
+    process.exit(1);
+});
+
+import dotenv from 'dotenv';
+const env = process.env.NODE_ENV || 'development';
+dotenv.config({ path: `.env.${env}` });
+dotenv.config({ path: `.env`, override: false });
+
+interface ScanTestCase {
+    name: string;
+    mnemonic: string;
+    bob_mnemonic: string;
+    amount_to_send_to_bob: number;
+    provider_outpoints: Array<{
+        address: string;
+        outpoints: Array<Outpoint>;
+    }>;
+    provider_locked_balance: Array<{
+        address: string;
+        balance: number;
+    }>;
+    provider_balance: Array<{
+        address: string;
+        balance: number;
+    }>;
+    provider_blocks: Array<{
+        key: string;
+        block: Block;
+    }>;
+    expected_external_addresses: Array<QiAddressInfo>;
+    expected_change_addresses: Array<QiAddressInfo>;
+    expected_outpoints_info: Array<OutpointInfo>;
+    expected_balance: number;
+    provider_estimate_fee_for_qi: Array<{
+        input: QiPerformActionTransaction;
+        output: number;
+    }>;
+    provider_network: Network;
+    provider_broadcast_transaction_receipt: string;
+    expected_signed_tx: string;
+}
+
+describe('QiHDWallet scan and send transaction', async function () {
+    const tests = loadTests<ScanTestCase>('qi-wallet-scan-and-send');
+
+    for (const test of tests) {
+        this.timeout(1200000);
+
+        const mockProvider = new MockProvider();
+
+        // set the provider outpoints
+        for (const outpoint of test.provider_outpoints) {
+            mockProvider.setOutpoints(outpoint.address, outpoint.outpoints);
+        }
+
+        // set the provider blocks
+        for (const block of test.provider_blocks) {
+            mockProvider.setBlock(block.key, block.block);
+        }
+
+        // set the provider locked balace
+        for (const lockedBalance of test.provider_locked_balance) {
+            mockProvider.setLockedBalance(lockedBalance.address, BigInt(lockedBalance.balance));
+        }
+
+        // set the provider balance
+        for (const balance of test.provider_balance) {
+            mockProvider.setBalance(balance.address, BigInt(balance.balance));
+        }
+
+        // set the provider estimate fee for Qi
+        for (const estimateFeeForQi of test.provider_estimate_fee_for_qi) {
+            mockProvider.setEstimateFeeForQi(estimateFeeForQi.input, estimateFeeForQi.output);
+        }
+
+        // set the provider network
+        mockProvider.setNetwork(test.provider_network);
+
+        const mnemonic = Mnemonic.fromPhrase(test.mnemonic);
+        const aliceWallet = QiHDWallet.fromMnemonic(mnemonic);
+        aliceWallet.connect(mockProvider);
+
+        const bobMnemonic = Mnemonic.fromPhrase(test.bob_mnemonic);
+        const bobWallet = QiHDWallet.fromMnemonic(bobMnemonic);
+
+        const alicePaymentCode = aliceWallet.getPaymentCode(0);
+        const bobPaymentCode = bobWallet.getPaymentCode(0);
+        aliceWallet.openChannel(bobPaymentCode);
+        bobWallet.openChannel(alicePaymentCode);
+
+        it('it scans Alice wallet with no errors', async function () {
+            try {
+                await aliceWallet.scan(Zone.Cyprus1);
+                assert.ok(true, '====> TESTING: scan completed');
+            } catch (error) {
+                console.error('====> TESTING: error: ', error);
+                assert.fail('====> TESTING: error: ', error);
+            }
+        });
+        it('validates expected Alice external addresses', async function () {
+            const externalAddresses = aliceWallet.getAddressesForZone(Zone.Cyprus1);
+            const sortedExternalAddresses = externalAddresses.sort((a, b) => a.address.localeCompare(b.address));
+            const sortedExpectedExternalAddresses = test.expected_external_addresses.sort((a, b) =>
+                a.address.localeCompare(b.address),
+            );
+            assert.deepEqual(sortedExternalAddresses, sortedExpectedExternalAddresses);
+        });
+
+        it('validates expected Alice change addresses', async function () {
+            const changeAddresses = aliceWallet.getChangeAddressesForZone(Zone.Cyprus1);
+            const sortedChangeAddresses = changeAddresses.sort((a, b) => a.address.localeCompare(b.address));
+            const sortedExpectedChangeAddresses = test.expected_change_addresses.sort((a, b) =>
+                a.address.localeCompare(b.address),
+            );
+            assert.deepEqual(sortedChangeAddresses, sortedExpectedChangeAddresses);
+        });
+
+        it('validates wallet balance', async function () {
+            const balance = await aliceWallet.getBalanceForZone(Zone.Cyprus1);
+            assert.equal(balance.toString(), test.expected_balance.toString());
+        });
+
+        it('validates expected outpoints info', async function () {
+            assert.deepEqual(aliceWallet.getOutpoints(Zone.Cyprus1), test.expected_outpoints_info);
+        });
+
+        it('sends transaction', async function () {
+            const aliceToBobTx = await aliceWallet.sendTransaction(
+                bobPaymentCode,
+                BigInt(test.amount_to_send_to_bob),
+                Zone.Cyprus1,
+                Zone.Cyprus1,
+            );
+            assert.ok(aliceToBobTx);
+        });
+
+        it('validate signed transaction', function () {
+            const signedTransaction = mockProvider.getSignedTransaction();
+            const expectedSignedTx = test.expected_signed_tx;
+
+            const tx = QiTransaction.from(signedTransaction);
+            const expectedTx = QiTransaction.from(expectedSignedTx);
+
+            // compare everyhing but the hash and signature
+            assert.deepEqual(tx.txInputs, expectedTx.txInputs);
+            assert.deepEqual(tx.txOutputs, expectedTx.txOutputs);
+            assert.deepEqual(tx.type, expectedTx.type);
+            assert.deepEqual(tx.chainId, expectedTx.chainId);
+
+            const valid = validateSignature(tx);
+            assert.ok(valid);
+        });
+    }
+});
+
+function validateSignature(tx: QiTransaction): boolean {
+    const digest = tx.digest;
+    const signature = tx.signature;
+    const pubkey = tx.txInputs[0].pubkey;
+
+    const pubkeyBytes = getBytes('0x' + pubkey.slice(4));
+    const signatureBytes = getBytes(signature);
+    const hashBytes = getBytes(digest);
+
+    return schnorr.verify(signatureBytes, hashBytes, pubkeyBytes);
+}
diff --git a/testcases/qi-wallet-scan-and-send.json.gz b/testcases/qi-wallet-scan-and-send.json.gz
new file mode 100644
index 00000000..43d174b1
Binary files /dev/null and b/testcases/qi-wallet-scan-and-send.json.gz differ