Function marketplace::buy_dtoken_reward

pub fn buy_dtoken_reward(
    resource_id: &[u8], 
    n: U128, 
    buyer_account: &Address, 
    payer: &Address, 
    unit_price: U128
) -> Vec<Vec<u8>>

buy_dtoken_reward

This method can only be called for items that the fee.count is 0, The buyer can reward the seller with any number of tokens.

resource_id used to mark the only commodity in the chain

n is the number of purchases

buyer_account is buyer address, need this address signature

payer is the address who pay the fee

unit_price unit price the buyer is willing to pay