> For the complete documentation index, see [llms.txt](https://andrewkimjoseph.gitbook.io/celina-sdk/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://andrewkimjoseph.gitbook.io/celina-sdk/services/nftservice.md).

# NftService

[**@andrewkimjoseph/celina-sdk**](/celina-sdk/api-reference/api-reference.md)

***

[@andrewkimjoseph/celina-sdk](/celina-sdk/api-reference/api-reference.md) / [services/nft.service](https://github.com/andrewkimjoseph/celina-sdk/blob/main/docs/api-reference/services/nft.service/README.md) / NftService

## Class: NftService

Defined in: [src/services/nft.service.ts:37](https://github.com/andrewkimjoseph/celina-sdk/blob/970ab720c805303ead8b20406c6579ecdcf2193a/src/services/nft.service.ts#L37)

ERC-721 / ERC-1155 collection and balance reads with optional metadata fetch.

### Constructors

#### Constructor

> **new NftService**(`clientFactory`): `NftService`

Defined in: [src/services/nft.service.ts:38](https://github.com/andrewkimjoseph/celina-sdk/blob/970ab720c805303ead8b20406c6579ecdcf2193a/src/services/nft.service.ts#L38)

**Parameters**

**clientFactory**

`CeloClientFactory`

**Returns**

`NftService`

### Methods

#### getNftBalance()

> **getNftBalance**(`contractAddress`, `ownerAddress`, `tokenId?`): `Promise`<{ `balance`: `string`; `contractAddress`: `` `0x${string}` ``; `network`: `"mainnet"`; `ownerAddress`: `` `0x${string}` ``; `standard`: `"ERC721"`; `tokenId`: `string` | `null`; } | { `balance`: `string`; `contractAddress`: `` `0x${string}` ``; `network`: `"mainnet"`; `ownerAddress`: `` `0x${string}` ``; `standard`: `"ERC1155"`; `tokenId`: `string`; }>

Defined in: [src/services/nft.service.ts:202](https://github.com/andrewkimjoseph/celina-sdk/blob/970ab720c805303ead8b20406c6579ecdcf2193a/src/services/nft.service.ts#L202)

NFT balance for an owner (ERC-721 collection total or ERC-1155 id-specific balance).

**Parameters**

**contractAddress**

`` `0x${string}` ``

NFT collection contract

**ownerAddress**

`` `0x${string}` ``

Holder wallet address

**tokenId?**

`string`

Required for ERC-1155; ignored for ERC-721 collection balance

**Returns**

`Promise`<{ `balance`: `string`; `contractAddress`: `` `0x${string}` ``; `network`: `"mainnet"`; `ownerAddress`: `` `0x${string}` ``; `standard`: `"ERC721"`; `tokenId`: `string` | `null`; } | { `balance`: `string`; `contractAddress`: `` `0x${string}` ``; `network`: `"mainnet"`; `ownerAddress`: `` `0x${string}` ``; `standard`: `"ERC1155"`; `tokenId`: `string`; }>

Balance as decimal string and detected standard

**Throws**

When ERC-1155 is detected but `tokenId` is omitted

***

#### getNftInfo()

> **getNftInfo**(`contractAddress`, `tokenId`): `Promise`<{ `attributes`: { }; `collection`: { `name`: `string`; `symbol`: `string`; `totalSupply`: `string` | `undefined`; }; `contractAddress`: `` `0x${string}` ``; `description`: `string` | `undefined`; `image`: `string` | `undefined`; `metadata`: `Record`<`string`, `unknown`> | `null`; `metadataUri`: `string` | `null`; `name`: `string`; `network`: `"mainnet"`; `owner`: `` `0x${string}` `` | `null`; `standard`: `NftStandard`; `tokenId`: `string`; }>

Defined in: [src/services/nft.service.ts:92](https://github.com/andrewkimjoseph/celina-sdk/blob/970ab720c805303ead8b20406c6579ecdcf2193a/src/services/nft.service.ts#L92)

Collection and token metadata for an ERC-721 or ERC-1155 contract.

**Parameters**

**contractAddress**

`` `0x${string}` ``

NFT collection contract

**tokenId**

`string`

Token id as decimal string

**Returns**

`Promise`<{ `attributes`: { }; `collection`: { `name`: `string`; `symbol`: `string`; `totalSupply`: `string` | `undefined`; }; `contractAddress`: `` `0x${string}` ``; `description`: `string` | `undefined`; `image`: `string` | `undefined`; `metadata`: `Record`<`string`, `unknown`> | `null`; `metadataUri`: `string` | `null`; `name`: `string`; `network`: `"mainnet"`; `owner`: `` `0x${string}` `` | `null`; `standard`: `NftStandard`; `tokenId`: `string`; }>

Standard, owner, collection info, and fetched JSON metadata when available

**Throws**

When the address is not a deployed NFT contract


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