Adjustments for fee voting

.ci-config/rippled.cfg

@@ -178,3 +178,9 @@ PriceOracle
 fixEmptyDID
 fixXChainRewardRounding
 fixPreviousTxnID
+
+# # This section can be used to simulate various FeeSettings scenarios for rippled node in standalone mode
+[voting]
+reference_fee = 200           # 200 drops
+account_reserve = 20000000   # 20 XRP
+owner_reserve = 5000000      # 5 XRP

packages/xrpl/HISTORY.md

@@ -7,6 +7,9 @@ Subscribe to [the **xrpl-announce** mailing list](https://groups.google.com/g/xr
 ### Added
 * parseTransactionFlags as a utility function in the xrpl package to streamline transactions flags-to-map conversion
 
+### Fixed
+* Remove hard-coded reference to 10 drops as the reference transaction cost. Ensure tests passed for all transaction fee scenarios and `AMMCreate` transaction fee calculation is correct in case `owner_reserve` increases.
+
 ## 4.0.0 (2024-07-15)
 
 ### BREAKING CHANGES

packages/xrpl/src/sugar/autofill.ts

@@ -230,13 +230,13 @@ export async function setNextValidSequenceNumber(
 }
 
 /**
- * Fetches the account deletion fee from the server state using the provided client.
+ * Fetches the owner reserve fee from the server state using the provided client.
  *
  * @param client - The client object used to make the request.
  * @returns A Promise that resolves to the account deletion fee as a BigNumber.
  * @throws {Error} Throws an error if the account deletion fee cannot be fetched.
  */
-async function fetchAccountDeleteFee(client: Client): Promise<BigNumber> {
+async function fetchOwnerReserveFee(client: Client): Promise<BigNumber> {
   const response = await client.request({ command: 'server_state' })
   const fee = response.result.state.validated_ledger?.reserve_inc
 
@@ -260,15 +260,14 @@ export async function calculateFeePerTransactionType(
   tx: Transaction,
   signersCount = 0,
 ): Promise<void> {
-  // netFee is usually 0.00001 XRP (10 drops)
   const netFeeXRP = await getFeeXrp(client)
   const netFeeDrops = xrpToDrops(netFeeXRP)
   let baseFee = new BigNumber(netFeeDrops)
 
   // EscrowFinish Transaction with Fulfillment
   if (tx.TransactionType === 'EscrowFinish' && tx.Fulfillment != null) {
     const fulfillmentBytesSize: number = Math.ceil(tx.Fulfillment.length / 2)
-    // 10 drops × (33 + (Fulfillment size in bytes / 16))
+    // BaseFee × (33 + (Fulfillment size in bytes / 16))
     const product = new BigNumber(
       // eslint-disable-next-line @typescript-eslint/no-magic-numbers -- expected use of magic numbers
       scaleValue(netFeeDrops, 33 + fulfillmentBytesSize / 16),
@@ -280,22 +279,21 @@ export async function calculateFeePerTransactionType(
     tx.TransactionType === 'AccountDelete' ||
     tx.TransactionType === 'AMMCreate'
   ) {
-    baseFee = await fetchAccountDeleteFee(client)
+    baseFee = await fetchOwnerReserveFee(client)
   }
 
   /*
    * Multi-signed Transaction
-   * 10 drops × (1 + Number of Signatures Provided)
+   * BaseFee × (1 + Number of Signatures Provided)
    */
   if (signersCount > 0) {
     baseFee = BigNumber.sum(baseFee, scaleValue(netFeeDrops, 1 + signersCount))
   }
 
   const maxFeeDrops = xrpToDrops(client.maxFeeXRP)
-  const totalFee =
-    tx.TransactionType === 'AccountDelete'
-      ? baseFee
-      : BigNumber.min(baseFee, maxFeeDrops)
+  const totalFee = ['AccountDelete', 'AMMCreate'].includes(tx.TransactionType)
+    ? baseFee
+    : BigNumber.min(baseFee, maxFeeDrops)
 
   // Round up baseFee and return it as a string
   // eslint-disable-next-line no-param-reassign, @typescript-eslint/no-magic-numbers -- param reassign is safe, base 10 magic num

packages/xrpl/test/integration/requests/fee.test.ts

@@ -1,7 +1,9 @@
+import BigNumber from 'bignumber.js'
 import { assert } from 'chai'
 import omit from 'lodash/omit'
 
-import { FeeRequest } from '../../../src'
+import { FeeRequest, xrpToDrops } from '../../../src'
+import getFeeXrp from '../../../src/sugar/getFeeXrp'
 import serverUrl from '../serverUrl'
 import {
   setupClient,
@@ -26,17 +28,21 @@ describe('fee', function () {
       const request: FeeRequest = {
         command: 'fee',
       }
+      const referenceFee = xrpToDrops(await getFeeXrp(testContext.client, 1))
+      const MEDIAN_FEE_MULTIPLIER = 500
       const response = await testContext.client.request(request)
       const expected = {
         id: 0,
         result: {
           current_ledger_size: '0',
           current_queue_size: '0',
           drops: {
-            base_fee: '10',
-            median_fee: '5000',
-            minimum_fee: '10',
-            open_ledger_fee: '10',
+            base_fee: referenceFee,
+            median_fee: new BigNumber(referenceFee)
+              .times(MEDIAN_FEE_MULTIPLIER)
+              .toString(),
+            minimum_fee: referenceFee,
+            open_ledger_fee: referenceFee,
           },
           expected_ledger_size: '1000',
           ledger_current_index: 2925,

packages/xrpl/test/integration/transactions/xchainClaim.test.ts

@@ -9,6 +9,7 @@ import {
   XChainCreateClaimID,
   xrpToDrops,
 } from '../../../src'
+import getFeeXrp from '../../../src/sugar/getFeeXrp'
 import serverUrl from '../serverUrl'
 import {
   setupBridge,
@@ -39,6 +40,7 @@ describe('XChainCreateBridge', function () {
       const destination = await generateFundedWallet(testContext.client)
       const otherChainSource = Wallet.generate()
       const amount = xrpToDrops(10)
+      const netFee = xrpToDrops(await getFeeXrp(testContext.client))
 
       const claimIdTx: XChainCreateClaimID = {
         TransactionType: 'XChainCreateClaimID',
@@ -103,7 +105,10 @@ describe('XChainCreateBridge', function () {
       )
       assert.equal(
         finalBalance,
-        initialBalance + Number(amount) - Number(signatureReward) - 12,
+        initialBalance +
+          Number(amount) -
+          Number(signatureReward) -
+          Number(netFee),
         "The destination's balance should not change yet",
       )
     },