feat(axelarnet): discard invalid address (#827) (#832)

* fix: discard invalid address

* feat: archive invalid transfer

(cherry picked from commit 4c5a8e1)

x/axelarnet/keeper/msg_server.go

@@ -159,7 +159,9 @@ func (s msgServer) ExecutePendingTransfers(c context.Context, req *types.Execute
 	for _, pendingTransfer := range pendingTransfers {
 		recipient, err := sdk.AccAddressFromBech32(pendingTransfer.Recipient.Address)
 		if err != nil {
-			return nil, err
+			ctx.Logger().Debug(fmt.Sprintf("Discard invalid recipient %s and continue", pendingTransfer.Recipient.Address))
+			s.nexus.ArchivePendingTransfer(ctx, pendingTransfer)
+			continue
 		}
 
 		// pending transfer can be either of cosmos based assets from evm, Axelarnet native asset from evm, assets from supported chain