feat: Tx fees (#92)

* Add getTxFee in Bank and PrimaryValidator class

* Add docs for getTxFee method

docs/bank.md

@@ -516,3 +516,13 @@ Simply use the `Bank.getBankPV` method which returns the formatted url of the Pr
 const bank = new tnb.Bank("http://143.110.137.54");
 const pv = await bank.getBankPV();
 ```
+
+## Getting the Bank's Transaction Fee
+
+Use the `Bank.getTxFee` method to get the transaction fee
+
+```ts
+const bank = new tnb.Bank("http://143.110.137.54");
+console.log(await bank.getTxFee());
+// 1
+```

docs/index.md

@@ -49,6 +49,8 @@ There are two ways to use the library.
 
   - [Getting the Bank's Primary Validator](bank.md#getting-the-bank's-primary-validator)
 
+  - [Getting the Bank's Transaction Fee](bank.md#getting-the-bank's-transaction-fee)
+
 - [Validator](validator.md#validator)
 
   - [Creating Validators](validator.md#creating-banks)
@@ -63,4 +65,6 @@ There are two ways to use the library.
 
   - [Adding Bank Blocks](validator.md#adding-bank-blocks)
 
+  - [Getting the Primary Validator's Transaction Fee](primary-validator.md#getting-the-primary-validator's-transaction-fee)
+
 - [Confirmation Validator](validator.md#confirmation-validator)

docs/primary-validator.md

@@ -30,3 +30,13 @@ const res = await primaryValidator.addBankBlocks("fakeBalanceLock", transactions
 ```
 
 As you can see, this method takes 3 parameters, the balanceLock of the account you are sending from, the list of transactions, and an account object with the correct accountNumber and signingKey.
+
+## Getting the Primary Validator's Transaction Fee
+
+Simply use the `PrimaryValidator.getTxFee` method to get the transaction fee
+
+```ts
+const primaryValidator = new tnb.PrimaryValidator("http://157.230.75.212");
+console.log(await primaryValidator.getTxFee());
+// 1
+```

src/bank.ts

@@ -152,4 +152,11 @@ export class Bank extends ServerNode {
       `${primary_validator.protocol}://${primary_validator.ip_address}:${primary_validator.port}`
     );
   }
+
+  /**
+   * Get transaction fee of the current Primary Validator
+   */
+  async getTxFee() {
+    return (await this.getConfig()).default_transaction_fee;
+  }
 }

src/primary-validator.ts

@@ -19,4 +19,11 @@ export class PrimaryValidator extends Validator {
   async addBankBlocks(balanceLock: string, transactions: Transaction[], account: Account) {
     return await this.postData("/bank_blocks", account.createBlockMessage(balanceLock, transactions));
   }
+
+  /**
+   * Get transaction fee of the current Primary Validator
+   */
+  async getTxFee() {
+    return (await this.getConfig()).default_transaction_fee;
+  }
 }