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Add from param #11

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Add from param #11

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449b920
Add from parameter in the style of other entrypoints
timothymcmackin May 10, 2024
8c84908
Add operator tests
timothymcmackin May 10, 2024
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51 changes: 47 additions & 4 deletions smartpy_fa2_fungible/part_4_complete.py
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Original file line number Diff line number Diff line change
Expand Up @@ -9,6 +9,7 @@
def my_module():

conversion_type: type = sp.record(
from_ = sp.address, # Account to convert tokens from
source_token_id = sp.nat, # The ID of the source token
target_token_id = sp.nat, # The ID of the target token
amount = sp.nat, # The number of source tokens to convert
Expand Down Expand Up @@ -46,16 +47,28 @@ def convert(self, batch):

for conversion in batch:

record(source_token_id, target_token_id, amount).match = conversion
record(
from_,
source_token_id,
target_token_id,
amount
).match = conversion

# Verify that transfers are allowed
assert self.private.policy.supports_transfer, "FA2_TX_DENIED"
# Verify that the source and target tokens exist
assert self.is_defined_(source_token_id), "FA2_TOKEN_UNDEFINED"
assert self.is_defined_(target_token_id), "FA2_TOKEN_UNDEFINED"

# Verify that the sender is either the owner or the operator of the source tokens
assert (sp.sender == from_) or self.data.operators.contains(
sp.record(
owner=from_, operator=sp.sender, token_id=source_token_id
)
), "FA2_NOT_OPERATOR"

# Get a pair to represent the key for the ledger for the source tokens
from_source = (sp.sender, source_token_id)
from_source = (from_, source_token_id)

# Burn the source tokens
self.data.ledger[from_source] = sp.as_nat(
Expand All @@ -72,7 +85,7 @@ def convert(self, batch):
self.data.supply[source_token_id] = 0

# Get a pair to represent the key for the ledger for the target tokens
from_target = (sp.sender, target_token_id)
from_target = (from_, target_token_id)

# Mint the target tokens
target_amount = self.data.ledger.get(from_target, default=0)
Expand Down Expand Up @@ -299,7 +312,7 @@ def test():

# Verify that you can convert your own tokens
conversions = [
sp.record(source_token_id = 0, target_token_id = 1, amount = 2),
sp.record(from_ = alice.address, source_token_id = 0, target_token_id = 1, amount = 2),
]
contract.convert(
conversions,
Expand All @@ -313,3 +326,33 @@ def test():
)
scenario.verify(_total_supply(contract, sp.record(token_id=0)) == 12)
scenario.verify(_total_supply(contract, sp.record(token_id=1)) == 16)

# Verify that you can't convert someone else's tokens
contract.convert(
conversions,
_sender=bob,
_valid=False,
_exception="FA2_NOT_OPERATOR"
)

# Make Bob an operator of Alice's token 0
operator_update = sp.record(owner=alice.address, operator=bob.address, token_id=0)
contract.update_operators(
[
sp.variant.add_operator(operator_update)
],
_sender=alice
)
# Have Bob convert Alice's tokens
contract.convert(
conversions,
_sender=bob
)
scenario.verify(
_get_balance(contract, sp.record(owner=alice.address, token_id=0)) == 6
)
scenario.verify(
_get_balance(contract, sp.record(owner=alice.address, token_id=1)) == 7
)
scenario.verify(_total_supply(contract, sp.record(token_id=0)) == 10)
scenario.verify(_total_supply(contract, sp.record(token_id=1)) == 18)