Aptos: Fix redeem method and fetching native decimals (#639)

Author: kev1n-peters

connect/src/protocols/tokenBridge/tokenTransfer.ts

@@ -644,6 +644,19 @@ export namespace TokenTransfer {
     }
 
     const dstToken = await TokenTransfer.lookupDestinationToken(srcChain, dstChain, transfer.token);
+    // TODO: this is a hack to get the aptos native gas token decimals
+    // which requires us to pass in a token address in canonical form
+    // but the `dstToken.address` here is in universal form
+    if (dstChain.chain === "Aptos" && dstToken.chain === "Aptos") {
+      const dstTb = await dstChain.getTokenBridge();
+      const wrappedNative = await dstTb.getWrappedNative();
+      if (
+        dstToken.address.toString() ===
+        (await dstTb.getTokenUniversalAddress(wrappedNative)).toString()
+      ) {
+        dstToken.address = wrappedNative;
+      }
+    }
     const dstDecimals = await dstChain.getDecimals(dstToken.address);
     const dstAmountReceivable = amount.scale(srcAmountTruncated, dstDecimals);
 

platforms/aptos/protocols/tokenBridge/src/tokenBridge.ts

@@ -298,8 +298,8 @@ export class AptosTokenBridge<N extends Network, C extends AptosChains>
       return typeInfo
         ? [
             typeInfo.account_address,
-            encoding.hex.decode(typeInfo.module_name),
-            encoding.hex.decode(typeInfo.struct_name),
+            String.fromCharCode(...encoding.hex.decode(typeInfo.module_name)),
+            String.fromCharCode(...encoding.hex.decode(typeInfo.struct_name)),
           ].join(APTOS_SEPARATOR)
         : null;
     } catch {