fix: ledger version in getTrustlines (#1505)

* fix: correctly propagate options.ledgerVersion 

* test: verify that `account_lines` uses correct `ledger_index`

src/ledger/trustlines.ts

@@ -31,7 +31,7 @@ async function getTrustlines(
   // 2. Make Request
   const responses = await this._requestAll('account_lines', {
     account: address,
-    ledger_index: await this.getLedgerVersion(),
+    ledger_index: options.ledgerVersion ?? await this.getLedgerVersion(),
     limit: options.limit,
     peer: options.counterparty
   })

test/api/getTrustlines/index.ts

@@ -37,4 +37,13 @@ export default <TestSuite>{
       'getTrustlines'
     )
   },
+
+  'getTrustlines - ledger version option': async (api, address) => {
+    const result = await api.getTrustlines(addresses.FOURTH_ACCOUNT, {ledgerVersion: 5})
+    assertResultMatch(
+      result,
+      RESPONSE_FIXTURES.moreThan400Items,
+      'getTrustlines'
+    )
+  },
 }

test/mock-rippled.ts

@@ -669,7 +669,11 @@ export function createMockRippled(port) {
     } else if (request.account === addresses.THIRD_ACCOUNT) {
       conn.send(accountLinesResponse.manyItems(request))
     } else if (request.account === addresses.FOURTH_ACCOUNT) {
+      if (request.ledger_index === 5) {
+        conn.send(accountLinesResponse.manyItems(request))
+      } else {
         conn.send(accountLinesResponse.ripplingDisabled(request))
+      }
     } else if (request.account === addresses.NOTFOUND) {
       conn.send(createResponse(request, fixtures.account_info.notfound))
     } else {