# Ticket <> multi currency payment

## Entry structures

struct Ticket {
    seller_address: Address,
    buyer_address: Address,
    product_address: Address // This is the product info address    
}

Only valid if accompanied by the signature of the `seller_address`.

## Process

- UI: ui from the side of the buyer
- TicketDHT: DHT of the dna which the Tickets zome is
- BuyerTicket: ticket zome in the buyer node
- BuyerTransactor: mutual-credit transactor node in the buyer node
- SellerTicket: ticket zome in the buyer node
- SellerTransactor: mutual-credit transactor node in the buyer node

sequenceDiagram
    participant UI
    participant TicketDHT
    participant BuyerTicket
    participant BuyerTransactor
    participant SellerTicket
    participant SellerTransactor
    
    UI-->>BuyerTicket: buy_ticket(payment_info_id)
    BuyerTicket-->>TicketDHT: get_currency_dna(payment_info_id)
    TicketDHT-->BuyerTicket: currency_dna_hash
    BuyerTicket-->>SellerTicket: get_agent_id_on_dna(currency_dna_hash)
    SellerTicket-->>SellerTransactor: bridge(get_my_agent_id)
    SellerTransactor-->SellerTicket: agent_id
    SellerTicket-->BuyerTicket: agent_id
    BuyerTicket-->>BuyerTransactor: create_offer(agent_id, payment_info.amount)
    BuyerTransactor-->SellerTransactor: create_offer(payment_info.amount)
    BuyerTransactor-->BuyerTicket: offer_id
    BuyerTicket-->>SellerTicket: offer_created(offer_id, payment_info_id)
    SellerTicket-->SellerTransactor: get_offer(offer_id)
    SellerTransactor-->SellerTicket: offer
    SellerTicket-->>TicketDHT: get_payment_info(payment_info_id)
    TicketDHT-->SellerTicket: payment_info
    SellerTicket-->>SellerTransactor: get_offer(offer.id)
    SellerTransactor-->SellerTicket: offer
    SellerTicket-->SellerTicket: check_offer_amount_matches_payment_info(offer, payment_info)
    SellerTicket-->>SellerTransactor: check_offer_is_executable(offer_id)
    SellerTransactor-->SellerTicket: executable_status
    SellerTicket-->>SellerTransactor: accept_offer(offer)
    SellerTransactor-->>BuyerTransactor: accept_offer
    BuyerTransactor-->SellerTransactor: signature
    SellerTransactor-->SellerTicket: okey
    SellerTicket-->SellerTicket: create_ticket(buyer_address, product_info_address)
    SellerTicket-->BuyerTicket: ticket