fix: support the new xtokens interface on interlay/kintsugi

src/adapters/interlay.ts

@@ -8,7 +8,11 @@ import { ISubmittableResult } from "@polkadot/types/types";
 import { BalanceAdapter, BalanceAdapterConfigs } from "../balance-adapter";
 import { BaseCrossChainAdapter } from "../base-chain-adapter";
 import { ChainName, chains } from "../configs";
-import { ApiNotFound, CurrencyNotFound } from "../errors";
+import {
+  ApiNotFound,
+  CurrencyNotFound,
+  DestinationWeightNotFound,
+} from "../errors";
 import {
   BalanceData,
   BasicToken,
@@ -216,6 +220,17 @@ class BaseInterlayAdapter extends BaseCrossChainAdapter {
       throw new CurrencyNotFound(token);
     }
 
+    // use "Unlimited" if the xToken.transfer's fourth parameter version supports it
+    const destWeight =
+      this.api.tx.xTokens.transfer.meta.args[3].type.toString() ===
+      "XcmV2WeightLimit"
+        ? "Unlimited"
+        : this.getDestWeight(token, to);
+
+    if (destWeight === undefined) {
+      throw new DestinationWeightNotFound(this.chain.id, to, token);
+    }
+
     return this.api.tx.xTokens.transfer(
       tokenId,
       amount.toChainData(),
@@ -231,7 +246,7 @@ class BaseInterlayAdapter extends BaseCrossChainAdapter {
         },
       },
       // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
-      this.getDestWeight(token, to)!.toString()
+      destWeight
     );
   }
 }

src/errors.ts

@@ -51,3 +51,12 @@ export class NoCrossChainAdapterFound extends Error {
     this.name = "NoCrossChainAdapterFound";
   }
 }
+
+export class DestinationWeightNotFound extends Error {
+  constructor(source: string, destination: string, token: string) {
+    super();
+
+    this.message = `Can't find ${source} addapter's destination weight for ${destination} destination sending ${token} token.`;
+    this.name = "DestinationWeightNotFound";
+  }
+}