# ERC721 Token ### erc721\_getBalance Return an address Token balance. #### Parameters | Name | Type | Description | | --------------- | ------ | -------------------------- | | contractAddress | String | Contract address of token. | | address | String | Address | #### Return Value | Name | Type | Description | | ------- | ---------- | ------------------------- | | balance | BigInteger | Token balance of address. | #### Example ```json { "jsonrpc": "2.0", "id": "00456", "result": { "resultCode": "200", "resultMessage": "Success", "resultData": { "balance": "10" } } } ``` ### erc721\_getTokenUri Return a minted tokenId URI. #### Parameters | Name | Type | Description | | --------------- | ---------- | -------------------------- | | contractAddress | String | Contract address of token. | | address | String | Address | | tokenId | BigInteger | token id | #### Return Value | Name | Type | Description | | ---- | ------ | ------------------ | | uri | String | minted tokenId uri | #### Example ```json { "jsonrpc": "2.0", "id": "00456", "result": { "resultCode": "200", "resultMessage": "Success", "resultData": { "uri": "http://www.test.com" } } } ``` ### erc721\_mint Create new token with uri data. Only the token owner can do this.. #### Parameters | Name | Type | Description | | --------------- | ---------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | contractAddress | String | Contract address of token | | sender | String | Address of token owner | | toAddress | String | Address for mint | | tokenId | BigInteger | token id | | uri | String |

The uri data to store in the token.
Max length : 100

| | tempKey | String | tempKey for "mint" | | hashKey | String | hash(tempKey \| secretKey) | | signature | String | sign( hash ( contractAddress \| sender \| toAddress \| tokenId \| uri \| tempKey \| hashKey ) ) by owner's privateKey using signData API | | gasPrice | BigDecimal | gasPrice | | nonce | BigInteger | nonce value. If it is null, it will be filled in automatically. If acceleration is needed, use the nonce value generated when performing the transaction and use a higher gasPrice than the previous transaction. | #### Return Value | Name | Type | Description | | ------------- | ---------- | -------------- | | transactionId | String | Transaction Id | | nonce | BigInteger | nonce value | {% hint style="info" %} A transactionId is returned, but that doesn't mean it has been added to the Block yet. You should check that the status is 1 by using net\_getTransactionStatus. {% endhint %} #### Example ```json { "jsonrpc": "2.0", "id": "00456", "result": { "resultCode": "200", "resultMessage": "Success", "resultData": { "transactionId": "0xf7d37be47ce8b563b07aa5e81e17e9722bab2e71374d970a558b45c0ed51df7b", "nonce": 32 } } } ``` ### erc721\_transfer Transfer NFT owner from from-address to to-address. #### Parameters | Name | Type | Description | | --------------- | ---------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | contractAddress | String | Contract address of token | | sender | String | Sender address | | toAddress | String | To address | | tokenId | BigInteger | Token Id | | tempKey | String | tempKey for "transfer" | | hashKey | String | hash(tempKey \| fromAddress' secretKey) | | signature | String | sign( hash ( contractAddress \| sender \| toAddress \| tokenId \| tempKey \| hashKey ) ) by formAddress's privateKey using signData API | | gasPrice | BigDecimal | gasPrice | | nonce | BigInteger | nonce value. If it is null, it will be filled in automatically. If acceleration is needed, use the nonce value generated when performing the transaction and use a higher gasPrice than the previous transaction. | #### Return Value | Name | Type | Description | | ------------- | ---------- | -------------- | | transactionId | String | Transaction Id | | none | BigInteger | nonce value | {% hint style="info" %} A transactionId is returned, but that doesn't mean it has been added to the Block yet. You should check that the status is 1 by using net\_getTransactionStatus. {% endhint %} #### Example ```json { "jsonrpc": "2.0", "id": "00456", "result": { "resultCode": "200", "resultMessage": "Success", "resultData": { "transactionId": "0xf7d37be47ce8b563b07aa5e81e17e9722bab2e71374d970a558b45c0ed51df7b", "noce": 32 } } } ``` ### erc721\_transferFrom Transfer NFT owner from from-address to to-address by spender address. #### Parameters | Name | Type | Description | | --------------- | ---------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | contractAddress | String | Contract address of token | | sender | String | Sender address | | fromAddress | String | From address | | toAddress | String | To address | | tokenId | BigInteger | Token Id | | tempKey | String | tempKey for "transfer" | | hashKey | String | hash(tempKey \| fromAddress' secretKey) | | signature | String | sign( hash ( contractAddress \| sender \| fromAddress \| toAddress \| tokenId \| tempKey \| hashKey ) ) by address's privateKey using signData API | | gasPrice | BigDecimal | gasPrice | | nonce | BigInteger | nonce value. If it is null, it will be filled in automatically. If acceleration is needed, use the nonce value generated when performing the transaction and use a higher gasPrice than the previous transaction. | #### Return Value | Name | Type | Description | | ------------- | ---------- | -------------- | | transactionId | String | Transaction Id | | nonce | BigInteger | nonce value | {% hint style="info" %} A transactionId is returned, but that doesn't mean it has been added to the Block yet. You should check that the status is 1 by using net\_getTransactionStatus. {% endhint %} #### Example ```json { "jsonrpc": "2.0", "id": "00456", "result": { "resultCode": "200", "resultMessage": "Success", "resultData": { "transactionId": "0xf7d37be47ce8b563b07aa5e81e17e9722bab2e71374d970a558b45c0ed51df7b", "nonce": 32 } } } ``` ### erc721\_approve Approve token from owner-address to spender-address. #### Parameters | Name | Type | Description | | --------------- | ---------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | contractAddress | String | Contract address of token | | sender | String | Sender address | | spender | String | Spender address | | tokenId | BigInteger | Token Id | | tempKey | String | tempKey for "approve" | | hashKey | String | hash(tempKey \| fromAddress' secretKey) | | signature | String | sign( hash ( contractAddress \| sender \| spender \| tokenId \| tempKey \| hashKey ) ) by formAddress's privateKey using signData API | | gasPrice | BigDecimal | gasPrice | | nonce | BigInteger | nonce value. If it is null, it will be filled in automatically. If acceleration is needed, use the nonce value generated when performing the transaction and use a higher gasPrice than the previous transaction. | #### Return Value | Name | Type | Description | | ------------- | ------ | -------------- | | transactionId | String | Transaction Id | {% hint style="info" %} A transactionId is returned, but that doesn't mean it has been added to the Block yet. You should check that the status is 1 by using net\_getTransactionStatus. {% endhint %} #### Example ```json { "jsonrpc": "2.0", "id": "00456", "result": { "resultCode": "200", "resultMessage": "Success", "resultData": { "transactionId": "0xf7d37be47ce8b563b07aa5e81e17e9722bab2e71374d970a558b45c0ed51df7b", "nonce": 32 } } } ``` ### erc721\_getApproved Returns an allowed token spender from owner address. #### Parameters | Name | Type | Description | | --------------- | ---------- | -------------------------- | | contractAddress | String | Contract address of token. | | tokenId | BigInteger | Token Id | #### Return Value | Name | Type | Description | | ------- | ------ | ----------------- | | address | String | Spender's address | #### Example ```json { "jsonrpc": "2.0", "id": "00456", "result": { "resultCode": "200", "resultMessage": "Success", "resultData": { "address": "0x666cf9aed17a9dfb4ae91b80789dd99803568b11" } } } ```