Rename RippleAPI client to Client (#1520)

* rename RippleAPI -> XrplClient

* more renames

* move API stuff to client folder

* rename all api -> client

* fix tests

* make tests run

* fix integ tests

* fix urls

* fix merge issues

* XrplClient -> Client

* fix merge issues

* rename xrpl-client npm symlink to xrpl-local

test/client/getPaymentChannel/index.ts

@@ -0,0 +1,44 @@
+import responses from '../../fixtures/responses'
+import {assertRejects, assertResultMatch, TestSuite} from '../../utils'
+const {getPaymentChannel: RESPONSE_FIXTURES} = responses
+
+/**
+ * Every test suite exports their tests in the default object.
+ * - Check out the "TestSuite" type for documentation on the interface.
+ * - Check out "test/client/index.ts" for more information about the test runner.
+ */
+export default <TestSuite>{
+  'getPaymentChannel': async (client, address) => {
+    const channelId =
+      'E30E709CF009A1F26E0E5C48F7AA1BFB79393764F15FB108BDC6E06D3CBD8415'
+    const result = await client.getPaymentChannel(channelId)
+    assertResultMatch(result, RESPONSE_FIXTURES.normal, 'getPaymentChannel')
+  },
+
+  'getPaymentChannel - full': async (client, address) => {
+    const channelId =
+      'D77CD4713AA08195E6B6D0E5BC023DA11B052EBFF0B5B22EDA8AE85345BCF661'
+    const result = await client.getPaymentChannel(channelId)
+    assertResultMatch(result, RESPONSE_FIXTURES.full, 'getPaymentChannel')
+  },
+
+  'getPaymentChannel - not found': async (client, address) => {
+    const channelId =
+      'DFA557EA3497585BFE83F0F97CC8E4530BBB99967736BB95225C7F0C13ACE708'
+    await assertRejects(
+      client.getPaymentChannel(channelId),
+      client.errors.RippledError,
+      'entryNotFound'
+    )
+  },
+
+  'getPaymentChannel - wrong type': async (client, address) => {
+    const channelId =
+      '8EF9CCB9D85458C8D020B3452848BBB42EAFDDDB69A93DD9D1223741A4CA562B'
+    await assertRejects(
+      client.getPaymentChannel(channelId),
+      client.errors.NotFoundError,
+      'Payment channel ledger entry not found'
+    )
+  }
+}