minifa2.py

import smartpy as sp

class FA2_mini(sp.Contract):
    def __init__(self, history, metadata):
        self.init(
            history = history,
            metadata = metadata
        )

    @sp.entry_point
    def transfer(self, params):
        tx_type = sp.TRecord(to_ = sp.TAddress,
                             token_id = sp.TNat,
                             amount = sp.TNat)
        tx_type = tx_type.layout(
                ("to_", ("token_id", "amount"))
        )
        transfer_type = sp.TRecord(from_ = sp.TAddress,
                                   txs = sp.TList(tx_type)).layout(
                                       ("from_", "txs"))
        sp.set_type(params, sp.TList(transfer_type))
        self.data.history.push(params)

    @sp.entry_point
    def default(self):
        self.data.history = []



def add_test(is_default = True):
    @sp.add_test(name = "fa2-mini", is_default = is_default)
    def test():
        scenario = sp.test_scenario()
        scenario.h1("Fake FA2 Contract")
        scenario.table_of_contents()
        # sp.test_account generates ED25519 key-pairs deterministically:
        admin = sp.test_account("Administrator")
        alice = sp.test_account("Alice")
        bob   = sp.test_account("Robert")
        # Let's display the accounts:
        scenario.h2("Accounts")
        scenario.show([admin, alice, bob])
        c1 = FA2_mini(history = [], metadata = sp.utils.metadata_of_url("https://example.com"))
        scenario += c1

## for the browser version.
if "templates" not in __name__:
    add_test()