# fxhash IRL Payment Integration Proposal

###### tags: `Autonomy` `fxhash`

## Direct pay to buy

Flow:

1. User pays to buy a token using {Apple,Google} Pay.
2. Autonomy server receives the payment receipts.
4. Autonomy server makes request to fxhash API with a signature
- centralized server to server call
6. fxhash mints to the destination address

sequenceDiagram

autonumber

participant User
participant App
participant Au Server
participant fxhash
participant Blockchain
participant Apple

User ->>+ App: Scan QR Code
App -->>- User: IRL Page
User ->>+ App: Click to buy
App -->>+ User: Prompt Apple Pay
User ->>- App: Pay
App ->>+ Apple: TX
Apple -->>- Au Server: Receipt
Au Server->>+Au Server: Prepare Mint
Au Server ->>+ fxhash: airdrop request
fxhash ->> Blockchain: mint (fxhash contract)
fxhash -->>- Au Server: ok
Au Server  ->>+ Blockchain: Wait token
Blockchain -->>- Au Server: New token
Au Server -->>- App: New token
App -->>- User: New token

## Mint Pass

Term:

- Mint pass: A token minted by Autonomy server. A user can use the token to redeem an artwork from fxhash

Flow:

1. A user pay to by a mint pass using {Apple, Google} Pay.
2. Autonomy server mints a mint pass to the user's address
3. User signs a signature to spend the mint token
4. App requests to fxhash API with a signature
- App to fxhash direct call
6. fxhash call to burn the mint pass
- validate the signature from user
7. fxhash call to mint to the destination address

sequenceDiagram

autonumber

participant User
participant App
participant Au Server
participant fxhash
participant Blockchain
participant Apple

rect rgb(191, 223, 255)
note right of User : Purchase
User ->>+ App: Click to buy
App -->>+ User: Prompt Apple Pay
User ->>- App: Pay
App ->>+ Apple: TX

Apple -->>- Au Server: Receipt
Au Server->>+Au Server: Prepare Mint
Au Server ->> Blockchain: Mint a mint pass (autonomy contract)
Au Server ->>+ Blockchain: Wait confirmation
Blockchain -->>- Au Server: New token
Au Server-->>-App: New token
App -->>- User: New token
end


rect rgb(223, 191, 255)
note right of User : Redeem
User ->>+ App: Scan QR Code
App -->>- User: IRL Page
User ->>+ App: Click to Redeem
App -->>+ User: Prompt sign to burn
User ->>- App: Sign
App ->>+ fxhash: airdrop request with <br> a signature for burn instructment
fxhash ->> Blockchain: Burn mint pass (autonomy contract)
fxhash ->> Blockchain: mint (fxhash contract)
fxhash -->>- App: sent

Blockchain ->>+Au Server : Listen new token
Au Server->>-App: Push token to app

App -->>- User: New token
end