feat: Bulk payments (#82)

* implement bulk transactions

* added bulkpayments method in AccountPaymentHandler

* updated payment handlet test

* updated payment handlet docs

.gitignore

@@ -127,3 +127,5 @@ types
 
 # Development File
 dev.js
+dev.ts
+

docs/account-payment-handler.md

@@ -4,32 +4,76 @@ In this section, we will look at the methods of the `AccountPaymentHandler` clas
 
 ## Sending Coins
 
-Any Application can send coins by using a bank to process an account's transactions.
+Any application or user send coins by using a bank to process an account's transactions.
 
->**Note**: Before you can send coins you need to call the `init()` method in order to update to retrieve the details and transactions fees for the **Bank** and **Primary Validator**
+> **Note**: Before you can send coins you need to call the `init()` method in order to update to retrieve the details and transactions fees for the **Bank** and **Primary Validator**
 
-We send coins using the `sendCoins()` method.
+Coins can be sent by using the `sendCoins()` method.
 
 ```ts
-
 const sendersAccount = new Account("fakeSigningKey");
 const bankUrl = "http://18.218.193.164";
 
-const paymentHandlerOptions={
-    account: sendersAccount,
-    bankUrl: bankUrl
-}
+const paymentHandlerOptions = {
+  account: sendersAccount,
+  bankUrl: bankUrl,
+};
 
 const paymentHandler = new tnb.AccountPaymentHandler(paymentHandlerOptions);
 
-// This is very important. 
+// This is very important.
 // Method for getting the Bank and Primary validator Transactions fees
 await paymentHandler.init();
 
 //This can be a new Account object or just the recipients account number
-const recipientAccount = new Account ("fakeSigningKey");
+const recipientAccount = new Account("fakeSigningKey");
 const amount = 1000;
 
 await sendCoins(recipientAccount, 1000);
+```
+
+## Send Bulk Payments
+
+Any application or user can send multiple coins to multiple recipients from a single account.
+
+> **Note**: Before you can send coins you need to call the `init()` method in order to update to retrieve the details and transactions fees for the **Bank** and **Primary Validator**
+
+Bulk payments can be sent by using the `sendBulkPayments()` method.
+
+```ts
+const sendersAccount = new Account("fakeSigningKey");
+const bankUrl = "http://18.218.193.164";
+
+const paymentHandlerOptions = {
+  account: sendersAccount,
+  bankUrl: bankUrl,
+};
+
+const paymentHandler = new tnb.AccountPaymentHandler(paymentHandlerOptions);
+
+// This is very important.
+// Method for getting the Bank and Primary validator Transactions fees
+await paymentHandler.init();
+
+/* Note
+    The sender cannot be listed as a recipient
+    A recipient cannot be listed more than once
+*/
+
+const txs = [
+  {
+    amount: 10,
+    recipient: "fakeAccountNumber1",
+  },
+  {
+    amount: 100,
+    recipient: "fakeAccountNumber2",
+  },
+  {
+    amount: 1000,
+    recipient: "fakeAccountNumber3",
+  },
+];
 
-```
+await sendBulkPayments(txs);
+```