Reorder ws urls for Karura and Acala for better reliability ⚙️

src/nodes/ParachainNode.ts

@@ -18,7 +18,8 @@ import {
   generateAddressPayload,
   getFees,
   createHeaderPolkadotXCM,
-  createCurrencySpecification
+  createCurrencySpecification,
+  getAllNodeProviders
 } from '../utils'
 import { constructRelayToParaParameters } from '../pallets/xcmPallet/utils'
 
@@ -137,6 +138,10 @@ abstract class ParachainNode {
       parameters: constructRelayToParaParameters(options, Version.V3)
     }
   }
+
+  getProvider(): string {
+    return getAllNodeProviders(this.node)[0]
+  }
 }
 
 export default ParachainNode

src/nodes/supported/Acala.ts

@@ -7,6 +7,7 @@ import {
   Version,
   type XTokensTransferInput
 } from '../../types'
+import { getAllNodeProviders } from '../../utils'
 import ParachainNode from '../ParachainNode'
 import XTokensTransferImpl from '../XTokensTransferImpl'
 
@@ -21,6 +22,11 @@ class Acala extends ParachainNode implements IXTokensTransfer {
       currencyID !== undefined ? { ForeignAsset: currencyID } : { Token: currency }
     return XTokensTransferImpl.transferXTokens(input, currencySelection)
   }
+
+  getProvider(): string {
+    // Return the second WebSocket URL because the first one is sometimes unreliable.
+    return getAllNodeProviders(this.node)[1]
+  }
 }
 
 export default Acala

src/nodes/supported/Karura.ts

@@ -7,6 +7,7 @@ import {
   type Extrinsic,
   type TSerializedApiCall
 } from '../../types'
+import { getAllNodeProviders } from '../../utils'
 import ParachainNode from '../ParachainNode'
 import XTokensTransferImpl from '../XTokensTransferImpl'
 
@@ -21,6 +22,11 @@ class Karura extends ParachainNode implements IXTokensTransfer {
       currencyID !== undefined ? { ForeignAsset: currencyID } : { Token: currency }
     return XTokensTransferImpl.transferXTokens(input, currencySelection)
   }
+
+  getProvider(): string {
+    // Return the second WebSocket URL because the first one is sometimes unreliable.
+    return getAllNodeProviders(this.node)[1]
+  }
 }
 
 export default Karura

src/utils.ts

@@ -294,13 +294,13 @@ export const getNodeEndpointOption = (node: TNode): any => {
 
 export const getAllNodeProviders = (node: TNode): string[] => {
   const { providers } = getNodeEndpointOption(node) ?? {}
+  if (providers.length < 1) {
+    throw new Error(`Node ${node} does not have any providers.`)
+  }
   return Object.values(providers ?? [])
 }
 
-export const getNodeProvider = (node: TNode): string | null => {
-  const providers = getAllNodeProviders(node)
-  return providers.length > 0 ? providers[0] : null
-}
+export const getNodeProvider = (node: TNode): string => getNode(node).getProvider()
 
 export const createApiInstance = async (wsUrl: string): Promise<ApiPromise> => {
   const wsProvider = new WsProvider(wsUrl)