Nonfungible

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Storage functions

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AccountBalance

Amount of tokens owned by an account in a collection.

Python

result = substrate.query(
    'Nonfungible', 'AccountBalance', [
    'u32',
    {
        'Ethereum': '[u8; 20]',
        'Substrate': 'AccountId',
    },
]
)

Return value

'u32'

---

Allowance

Allowance set by a token owner for another user to perform one of certain transactions on a token.

Python

result = substrate.query(
    'Nonfungible', 'Allowance', ['u32', 'u32']
)

Return value

{'Ethereum': '[u8; 20]', 'Substrate': 'AccountId'}

---

CollectionAllowance

Operator set by a wallet owner that could perform certain transactions on all tokens in the wallet.

Python

result = substrate.query(
    'Nonfungible', 'CollectionAllowance', [
    'u32',
    {
        'Ethereum': '[u8; 20]',
        'Substrate': 'AccountId',
    },
    {
        'Ethereum': '[u8; 20]',
        'Substrate': 'AccountId',
    },
]
)

Return value

'bool'

---

Owned

Used to enumerate tokens owned by account.

Python

result = substrate.query(
    'Nonfungible', 'Owned', [
    'u32',
    {
        'Ethereum': '[u8; 20]',
        'Substrate': 'AccountId',
    },
    'u32',
]
)

Return value

'bool'

---

TokenAuxProperties

Custom data of a token that is serialized to bytes, primarily reserved for on-chain operations, normally obscured from the external users.

Auxiliary properties are slightly different from usual [TokenProperties] due to an unlimited number and separately stored and written-to key-value pairs.

Currently unused.

Python

result = substrate.query(
    'Nonfungible', 'TokenAuxProperties', ['u32', 'u32', ('None', 'Rmrk'), 'Bytes']
)

Return value

'Bytes'

---

TokenChildren

Used to enumerate token's children.

Python

result = substrate.query(
    'Nonfungible', 'TokenChildren', ['u32', 'u32', ('u32', 'u32')]
)

Return value

'bool'

---

TokenData

Token data, used to partially describe a token.

Python

result = substrate.query(
    'Nonfungible', 'TokenData', ['u32', 'u32']
)

Return value

{'owner': {'Ethereum': '[u8; 20]', 'Substrate': 'AccountId'}}

---

TokenProperties

Map of key-value pairs, describing the metadata of a token.

Python

result = substrate.query(
    'Nonfungible', 'TokenProperties', ['u32', 'u32']
)

Return value

{'_reserved': 'u32', 'consumed_space': 'u32', 'map': 'scale_info::590'}

---

TokensBurnt

Amount of burnt tokens in a collection.

Python

result = substrate.query(
    'Nonfungible', 'TokensBurnt', ['u32']
)

Return value

'u32'

---

TokensMinted

Total amount of minted tokens in a collection.

Python

result = substrate.query(
    'Nonfungible', 'TokensMinted', ['u32']
)

Return value

'u32'

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Errors

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CantBurnNftWithChildren

Unable to burn NFT with children

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NonfungibleItemsHaveNoAmount

Used amount > 1 with NFT

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NotNonfungibleDataUsedToMintFungibleCollectionToken

Not Nonfungible item data used to mint in Nonfungible collection.

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