how to pay transaction fee through custom token?

Question

i am working on substrate i have created a custom token using pallet_assets,how can i configure the transaction_fee using the custom token i have seen the pallet_assets_transaction payment which say's

i have added pallet_asset_tx_payment to my runtime Config and construct_runtime & SignedExtension

After above implementation when i try to transfer the assets from account A to account B the fees is getting deducted from the native token.

i tried to add into pallet_transaction_payment::Config for Runtime can i do something like this?

type OnChargeTransaction = FungiblesAdapter<Balances,()>;

or is there any other way to do this? i have taken the reference from here but it did't work for me.

Answer 1

Since you are not providing a lot of information it is hard to help you, but let me give you the main configurations you have to make in your runtime/src/lib.rs:

1. For paying fees with custom token you'd want the pallet-asset-tx-payment in stead of the pallet-transaction-payment (native token). You can implement it like its done in Statemint.

2. Adding it as a SignedExtension, like so.

3. Adding it in the construct_runtime, like so.