caver.klay.KIP17

A caver-js object used to interact with a smart contract for KIP17.

caver.klay.KIP17 helps you easily handle a smart contract that implements KIP-17 as a JavaScript object on the Klaytn blockchain.
The caver.klay.KIP17 inherits caver.klay.Contract to implement the KIP-17 token contract. The caver.klay.KIP17 holds the same properties of caver.klay.Contract whereas there are additional methods to implement extra features. This section only introduces the newly added bound methods of the caver.klay.KIP17.
The code that implements KIP-17 for caver-js is available on the Klaytn Contracts Github Repo.
For more information about KIP-17, see Klaytn Improvement Proposals.
NOTE caver.klay.KIP17 is supported since caver-js v1.4.1.
caver.klay.KIP17.deploy
caver.klay.KIP17.deploy(tokenInfo, deployer)
Deploys the KIP-17 token contract to the Klaytn blockchain. A contract deployed using caver.klay.KIP17.deploy is a non-fungible token that follows the KIP-17 standard.
After successful deployment, the promise will be resolved with a new KIP17 instance.
Parameters
Name
Type
Description
tokenInfo
Object
The information needed to deploy KIP-17 token contract on the Klaytn blockchain. See the below table for the details.
deployer
String
The address of the account to deploy the KIP-17 token contract. This account must have enough KLAY to deploy.
The tokenInfo object must contain the following:
Name
Type
Description
name
String
The name of the token.
symbol
String
The symbol of the token.
Return Value
PromiEvent: A promise combined event emitter, which is resolved with a new KIP17 instance. Additionally, the following events can occur:
Name
Type
Description
transactionHash
String
Fired right after the transaction is sent and a transaction hash is available.
receipt
Object
Fired when the transaction receipt is available. If you want to know about the properties inside the receipt object, see getTransactionReceipt. Receipts from KIP17 instances have an 'events' attribute parsed via abi instead of a 'logs' attribute.
error
Error
Fired if an error occurs during sending.
Example
// using the promise
> caver.klay.KIP17.deploy({
    name: 'Jasmine',
    symbol: 'JAS',
}, '0x{address in hex}').then(console.log)
KIP17 {
    ...
    _address: '0xfA7D967f414468083aDAd85257a2cBD6019693C2',
    _jsonInterface: [
        ...
        {
            anonymous: false,
            inputs: [
                { indexed: true, name: 'owner', type: 'address' },
                 { indexed: true, name: 'operator', type: 'address' },
                 { indexed: false, name: 'approved', type: 'bool' }
            ],
            name: 'ApprovalForAll',
            type: 'event',
            signature: '0x17307...'
        }
    ] 
}
​
// using event emitter and promise
> caver.klay.KIP17.deploy({
    name: 'Jasmine',
    symbol: 'JAS',
}, '0x{address in hex}')
.on('error', function(error) { ... })
.on('transactionHash', function(transactionHash) { ... })
.on('receipt', function(receipt) {
    console.log(receipt.contractAddress) // contains the new token contract address
})
.then(function(newKIP17Instance) {
    console.log(newKIP17Instance.options.address) // instance with the new token contract address
})
new KIP17
new caver.klay.KIP17([tokenAddress])
Creates a new KIP17 instance with its bound methods and events.
Parameters
Name
Type
Description
tokenAddress
String
(optional) The address of the KIP-17 token contract, which can be assigned later through kip17Instance.options.address = '0x1234..'
Return Value
Type
Description
Object
The KIP17 instance with its bound methods and events.
Example
// Create a KIP17 instance without a parameter
> const kip17Instance = new caver.klay.KIP17()
​
// Create a KIP17 instance with a token address
> const kip17Instance = new caver.klay.KIP17('0x{address in hex}')
kip17Instance.clone
kip17Instance.clone([tokenAddress])
Clones the current KIP17 instance.
Parameters
Name
Type
Description
tokenAddress
String
(optional) The address of the smart contract that deployed another KIP-17 token. If omitted, it will be set to the contract address in the original instance.
Return Value
Type
Description
Object
The clone of the original KIP17 instance.
Example
> const kip17Instance = new caver.klay.KIP17(address)
​
// Clone without a parameter
> const cloned = kip17Instance.clone()
​
// Clone with the address of the new token contract
> const cloned = kip17Instance.clone('0x{address in hex}')
kip17Instance.supportsInterface
kip17Instance.supportsInterface(interfaceId)
Returns true if this contract implements the interface defined by interfaceId.
Parameters
Name
Type
Description
interfaceId
String
The interfaceId to be checked.
Return Value
Promise returns Boolean: true if this contract implements the interface defined by interfaceId.
Example
> kip17Instance.supportsInterface('0x80ac58cd').then(console.log)
true
​
> kip17Instance.supportsInterface('0xa22cb465').then(console.log)
false
kip17Instance.name
kip17Instance.name()
Returns the name of the token.
Parameters
None
Return Value
Promise returns String: The name of the token.
Example
> kip17Instance.name().then(console.log)
Jasmine
kip17Instance.symbol
kip17Instance.symbol()
Returns the symbol of the token.
Parameters
None
Return Value
Promise returns String: The symbol of the token.
Example
> kip17Instance.symbol().then(console.log)
JAS
kip17Instance.totalSupply
kip17Instance.totalSupply()
Returns the total number of tokens minted by the contract.
Parameters
None
Return Value
Promise returns BigNumber: The total number of tokens.
Example
> kip17Instance.totalSupply().then(console.log)
10
kip17Instance.tokenURI
kip17Instance.tokenURI(tokenId)
Returns the URI for a given token id.
Parameters
Name
Type
Description
tokenId
BigNumber | String | Number
The id of the token.
NOTE The tokenId parameter accepts Number type but if the fed value were out of the range capped by Number.MAX_SAFE_INTEGER, it might cause an unexpected result or error. In this case, it is recommended to use the BigNumber type, especially for a uint256 sized numeric input value.
Return Value
Promise returns String: The URI of the given token.
Example
> kip17Instance.tokenURI(0).then(console.log)
https://kip17.example/uri-ex-caver.json
kip17Instance.tokenOfOwnerByIndex
kip17Instance.tokenOfOwnerByIndex(owner, index)
Searches the owner's token list for the given index, and returns the token id of a token positioned at the matched index in the list if there is a match.
Parameters
Name
Type
Description
owner
String
The address of the account who owns tokens.
index
BigNumber | String | Number
The index of a token in owner's token list.
NOTE The index parameter accepts Number type but if the fed value were out of the range capped by Number.MAX_SAFE_INTEGER, it might cause an unexpected result or error. In this case, it is recommended to use the BigNumber type, especially for a uint256 sized numeric input value.
Return Value
Promise returns BigNumber: The id of the token.
Example
> kip17Instance.tokenOfOwnerByIndex('0x{address in hex}', 5).then(console.log)
5
kip17Instance.tokenByIndex
kip17Instance.tokenByIndex(index)
Searches the list of all tokens in this contract for the given index, and returns the token id of a token positioned at the matched index in the list if there is a match. It reverts if the index is greater or equal to the total number of tokens.
Parameters
Name
Type
Description
index
BigNumber | String | Number
The index of a token to be queried.
NOTE The index parameter accepts Number type but if the fed value were out of the range capped by Number.MAX_SAFE_INTEGER, it might cause an unexpected result or error. In this case, it is recommended to use the BigNumber type, especially for a uint256 sized numeric input value.
Return Value
Promise returns BigNumber: The id of the token.
Example
> kip17Instance.tokenByIndex(1).then(console.log)
1
kip17Instance.balanceOf
kip17Instance.balanceOf(address)
Returns the balance of the given account address. The balance of an account in KIP-17 is the total number of NFTs (Non-Fungible Tokens) owned by the account.
Parameters
Name
Type
Description
address
String
The address of the account to be checked for its balance.
Return Value
Promise returns BigNumber: The account balance.
Example
> kip17Instance.balanceOf('0x{address in hex}').then(console.log)
9
kip17Instance.ownerOf
kip17Instance.ownerOf(tokenId)
Returns the address of the owner of the specified token id.
Parameters
Name
Type
Description
tokenId
BigNumber | String | Number
The id of the token.
NOTE The tokenId parameter accepts Number type but if the fed value were out of the range capped by Number.MAX_SAFE_INTEGER, it might cause an unexpected result or error. In this case, it is recommended to use the BigNumber type, especially for a uint256 sized numeric input value.
Return Value
Promise returns String: The address of the account that owns the given token.
Example
> kip17Instance.ownerOf(8).then(console.log)
0x0e0E95426343d97CC7BB913C7D7DBea065A31814
kip17Instance.getApproved
kip17Instance.getApproved(tokenId)
Returns the address who was permitted to transfer this token, or 'zero' address, if no address was approved. It reverts if the given token id does not exist.
Parameters
Name
Type
Description
tokenId
BigNumber | String | Number
The id of the token.
NOTE The tokenId parameter accepts Number type but if the fed value were out of the range capped by Number.MAX_SAFE_INTEGER, it might cause an unexpected result or error. In this case, it is recommended to use the BigNumber type, especially for a uint256 sized numeric input value.
Return Value
Promise returns String: The address of the account that has the right to transfer the given token.
Example
// If an approved address exists
> kip17Instance.getApproved(10).then(console.log)
0x23D8E9cae17b22d3DAC65b4F7D2C737C6A7b865d
​
// If no approved address exists
> kip17Instance.getApproved(3).then(console.log)
0x0000000000000000000000000000000000000000
kip17Instance.isApprovedForAll
kip17Instance.isApprovedForAll(owner, operator)
Returns true if an operator is approved to transfer all tokens that belong to the owner.
Parameters
Name
Type
Description
owner
String
The address of an account that owns tokens and has allowed the operator to send all its tokens.
operator
String
The address of the account approved to send owner's all tokens in place of the owner.
Return Value
Promise returns Boolean: true if an operator is approved to send all tokens that belong to the owner.
Example
> kip17Instance.isApprovedForAll('0x{address in hex}', '0x{address in hex}').then(console.log)
false
​
> kip17Instance.isApprovedForAll('0x{address in hex}', '0x{address in hex}').then(console.log)
true
kip17Instance.isMinter
kip17Instance.isMinter(address)
Returns true if the given account is a minter who can issue new tokens in the current contract conforming to KIP-17.
Parameters
Name
Type
Description
address
String
The address of the account to be checked for having the minting right.
Return Value
Promise returns Boolean: true if the account is a minter.
Example
> kip17Instance.isMinter('0x{address in hex}').then(console.log)
true
​
> kip17Instance.isMinter('0x{address in hex}').then(console.log)
false
kip17Instance.paused
kip17Instance.paused()
Returns true if the contract is paused, and false otherwise.
Parameters
None
Return Value
Promise returns Boolean: true if the contract is paused.
Example
> kip17Instance.paused().then(console.log)
true
​
> kip17Instance.paused().then(console.log)
false
kip17Instance.isPauser
kip17Instance.isPauser(address)
Returns true if the given account is a pauser who can suspend transferring tokens.
Parameters
Name
Type
Description
address
String
The address of the account to be checked for having the right to suspend transferring tokens.
Return Value
Promise returns Boolean: true if the account is a pauser.
Example
> kip17Instance.isPauser('0x{address in hex}').then(console.log)
true
​
> kip17Instance.isPauser('0x{address in hex}').then(console.log)
false
kip17Instance.approve
kip17Instance.approve(to, tokenId [, sendParam])
Approves another address to transfer a token of the given token id. The zero address indicates there is no approved address. There can only be one approved address per token. This method is allowed to call only by the token owner or an approved operator.
Note that this method will submit a transaction to the Klaytn network, which will charge the transaction fee to the sender.
Parameters
Name
Type
Description
to
String
The address of the account who spends tokens in place of the owner.
tokenId
BigNumber | String | Number
The id of the token the spender is allowed to use.
sendParam
Object
(optional) An object with defined parameters for sending a transaction.
NOTE The tokenId parameter accepts Number type but if the fed value were out of the range capped by Number.MAX_SAFE_INTEGER, it might cause an unexpected result or error. In this case, it is recommended to use the BigNumber type, especially for a uint256 sized numeric input value.
The sendParam object can contain the following:
Name
Type
Description
from
String
(optional) The address from which the transaction should be sent. If omitted, it will be set by this.options.from. If neither of from in sendParam object nor this.options.from were not provided, an error would occur.
gas
Number | String
(optional) The maximum gas provided for this transaction (gas limit). If omitted, it will be set by caver-js via calling this.methods.approve(spender, tokenId).estimateGas({from}).
gasPrice
Number | String
(optional) The gas price in peb to use for this transaction. If omitted, it will be set by caver-js via calling caver.klay.getGasPrice.
value
Number | String | BN | BigNumber
(optional) The value to be transferred in peb.
Return Value
Promise returns Object - The receipt containing the result of the transaction execution. If you want to know about the properties inside the receipt object, see the description of getTransactionReceipt. Receipts from KIP-17 instances have an 'events' attribute parsed via ABI instead of a 'logs' attribute.
Example
// Send via a sendParam object with the from field given 
> kip17Instance.approve('0x{address in hex}', 10, { from: '0x{address in hex}' }).then(console.log)
{
    blockHash: '0x3875c3f3120c1773c3adeb97260808c8a385bf8427bc203d10cbc5d262f67dbc',
    blockNumber: 2650,
    contractAddress: null,
    from: '0x1147c04b90d1546d76983e19937ad2cdae8b8afd',
    ...
    status: true,
    to: '0x5e0e6f1f0bdf9a263e1b1bb6e9759ba182982377',
    ...
    events: {
        Approval: {
            address: '0x5E0e6F1F0bDf9A263e1B1bB6e9759Ba182982377',
            blockNumber: 2650,
            transactionHash: '0x0ae92570560d64fa103c8be1861c8625d34ac560066398d9ad0d389ad5f7e441',
            transactionIndex: 0,
            blockHash: '0x3875c3f3120c1773c3adeb97260808c8a385bf8427bc203d10cbc5d262f67dbc',
            logIndex: 0,
            id: 'log_55296c9d',
            returnValues: {
                '0': '0x1147c04b90D1546d76983e19937aD2cDAE8b8afD',
                '1': '0x58746F9D739bC81713E5F5512529876F508a6166',
                '2': '2',
                owner: '0x1147c04b90D1546d76983e19937aD2cDAE8b8afD',
                approved: '0x58746F9D739bC81713E5F5512529876F508a6166',
                tokenId: '2',
            },
            event: 'Approval',
            signature: '0x8c5be1e5ebec7d5bd14f71427d1e84f3dd0314c0f7b2291e5b200ac8c7c3b925',
            raw: {
                data: '0x',
                topics: [ '0x8c5be...', '0x00...afd', '0x00...166', '0x00...002' ],
            },
        },
    },
}
​
// Using kip17Instance.options.from
// If the value of kip17Instance.options.from is set, this value is used as the default value 
// unless you specify `from` in the sendParam object when sending a transaction with a kip17Instance instance.
> kip17Instance.options.from = '0x{address in hex}'
> kip17Instance.approve('0x{address in hex}', 10).then(console.log)
kip17Instance.setApprovalForAll
kip17Instance.setApprovalForAll(to, approved [, sendParam])
Approves the given operator to, or disallow the given operator, to transfer all tokens of the owner.
Note that the setApprovalForAll method will submit a transaction to the Klaytn network, which will charge the transaction fee to the sender.
Parameters
Name
Type
Description
to
String
The address of an account to be approved/prohibited to transfer the owner's all tokens.
approved
Boolean
This operator will be approved if true. The operator will be disallowed if false.
sendParam
Object
(optional) An object with defined parameters for sending a transaction. For more information about sendParam, refer to the parameter description of approve.
Return Value
Promise returns Object - The receipt containing the result of the transaction execution. If you want to know about the properties inside the receipt object, see the description of getTransactionReceipt. Receipts from KIP-17 instances have an 'events' attribute parsed via ABI instead of a 'logs' attribute.
Example
// Send via a sendParam object with the from field given 
> kip17Instance.setApprovalForAll('0x{address in hex}', false, { from: '0x{address in hex}' }).then(console.log)
{
    blockHash: '0x34379ac5b71f16f41d5171d021ca2945e02c60d9fb7f85fc0127262c2ce72b47',
    blockNumber: 3340,
    contractAddress: null,
    from: '0x1147c04b90d1546d76983e19937ad2cdae8b8afd',
    ...
    status: true,
    to: '0x1f15b1a4da5437b29bfb7f248b5e344e6b16b654',
    ...
    events: {
        ApprovalForAll: {
            address: '0x1f15B1A4DA5437b29BfB7f248B5e344E6b16b654',
            blockNumber: 3340,
            transactionHash: '0x72fdf23482b9cf164638e6cbdfdf56541a6189c88639e21f076a8a50ef749a50',
            transactionIndex: 0,
            blockHash: '0x34379ac5b71f16f41d5171d021ca2945e02c60d9fb7f85fc0127262c2ce72b47',
            logIndex: 0,
            id: 'log_1069ad22',
            returnValues: {
                '0': '0x1147c04b90D1546d76983e19937aD2cDAE8b8afD',
                '1': '0x399bE7034F26feFB5AE683e488903B8bE5ad38b8',
                '2': false,
                owner: '0x1147c04b90D1546d76983e19937aD2cDAE8b8afD',
                operator: '0x399bE7034F26feFB5AE683e488903B8bE5ad38b8',
                approved: false,
            },
            event: 'ApprovalForAll',
            signature: '0x17307eab39ab6107e8899845ad3d59bd9653f200f220920489ca2b5937696c31',
            raw: {
                data: '0x0000000000000000000000000000000000000000000000000000000000000000',
                topics: [ '0x17307...', '0x00...afd', '0x00...8b8' ],
            },
        },
    },
}
​
// Using kip17Instance.options.from
// If the value of kip17Instance.options.from is set, this value is used as the default value 
// unless you specify `from` in the sendParam object when sending a transaction with a kip17Instance instance.
> kip17Instance.options.from = '0x{address in hex}'
> kip17Instance.setApprovalForAll('0x{address in hex}', true).then(console.log)
kip17Instance.transferFrom
kip17Instance.transferFrom(from, to, tokenId [, sendParam])
Transfers the token of the given token id tokenId from the token owner's balance to another address. The address who was approved to send the token owner's token (the operator) or the token owner itself is expected to execute this token transferring transaction. Thus, the approved one or the token owner should be the sender of this transaction whose address must be given at sendParam.from or kip7Instance.options.from. Without sendParam.from nor kip7Instance.options.from being provided, an error would occur. It is recommended to use safeTransferFrom whenever possible instead of this method.
Note that sending this transaction will charge the transaction fee to the transaction sender.
Parameters
Name
Type
Description
from
String
The address of the owner or the approved operator of the given token.
to
String
The address of the account to receive the token.
tokenId
BigNumber | String | Number
The id of the token you want to transfer.
sendParam
Object
(optional) An object with defined parameters for sending a transaction. For more information about sendParam, refer to the parameter description of approve.
NOTE The tokenId parameter accepts Number type but if the fed value were out of the range capped by Number.MAX_SAFE_INTEGER, it might cause an unexpected result or error. In this case, it is recommended to use the BigNumber type, especially for a uint256 sized numeric input value.
Return Value
Promise returns Object - The receipt containing the result of the transaction execution. If you want to know about the properties inside the receipt object, see the description of getTransactionReceipt. Receipts from KIP-17 instances have an 'events' attribute parsed via ABI instead of a 'logs' attribute.
Example
// Send via a sendParam object with the from field given 
> kip17Instance.transferFrom('0x{address in hex}', '0x{address in hex}', 2, { from: '0x{address in hex}' }).then(console.log)
{
    blockHash: '0x9cae3aa93d327804f333674a77d5d01d8c7908c49749b0d747b6391faa232b58',
    blockNumber: 3592,
    contractAddress: null,
    from: '0x9c4fc0ab840914a29c7deb5cc5c625a4cec3a9cd',
    ...
    status: true,
    to: '0x6e611498570bbc8cb127899c4d24e156ec72473a',
    ...
    events: {
        Transfer: {
            address: '0x6e611498570bBc8cb127899C4D24e156ec72473a',
            blockNumber: 3592,
            transactionHash: '0x386af961e5acda2c5bd58ec71ee52f579dc2b07a2e5ec97678453f04cc1b709a',
            transactionIndex: 0,
            blockHash: '0x9cae3aa93d327804f333674a77d5d01d8c7908c49749b0d747b6391faa232b58',
            logIndex: 0,
            id: 'log_c2ba5874',
            returnValues: {
                '0': '0x1147c04b90D1546d76983e19937aD2cDAE8b8afD',
                '1': '0x045796ABC035001CF50274FcA8A2614Abf5dd6bf',
                '2': '2',
                from: '0x1147c04b90D1546d76983e19937aD2cDAE8b8afD',
                to: '0x045796ABC035001CF50274FcA8A2614Abf5dd6bf',
                tokenId: '2',
            },
            event: 'Transfer',
            signature: '0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef',
            raw: {
                data: '0x',
                topics: [ '0xddf25...', '0x00...afd', '0x00...6bf', '0x00...002' ],
            },
        },
    },
}
​
// Using kip17Instance.options.from
// If the value of kip17Instance.options.from is set, this value is used as the default value 
// unless you specify `from` in sendParam object when sending a transaction with a kip17Instance instance.
> kip17Instance.options.from = '0x{address in hex}'
> kip17Instance.transferFrom('0x{address in hex}', '0x{address in hex}', 2).then(console.log)
kip17Instance.safeTransferFrom
kip17Instance.safeTransferFrom(from, to, tokenId [, data] [, sendParam])
Safely transfers the token of the given token id tokenId from the token owner's balance to another address. The address who was approved to send the token owner's token (the operator) or the token owner itself is expected to execute this token transferring transaction. Thus, the approved one or the token owner should be the sender of this transaction whose address must be given at sendParam.from or kip7Instance.options.from. Without sendParam.from nor kip7Instance.options.from being provided, an error would occur.
If the to is a contract address, it must implement IKIP17Receiver.onKIP17Received. otherwise, the transfer is reverted.
Note that sending this transaction will charge the transaction fee to the transaction sender.
Parameters
Name
Type
Description
from
String
The address of the owner or the approved operator of the given token.
to
String
The address of the account to receive the token.
tokenId
BigNumber | String | Number
The id of the token you want to transfer.
data
Buffer | String | Number
(optional) The optional data to send along with the call.
sendParam
Object
(optional) An object with defined parameters for sending a transaction. For more information about sendParam, refer to the parameter description of approve

Name	Type	Description
tokenInfo	Object	The information needed to deploy KIP-17 token contract on the Klaytn blockchain. See the below table for the details.
deployer	String	The address of the account to deploy the KIP-17 token contract. This account must have enough KLAY to deploy.

Name	Type	Description
name	String	The name of the token.
symbol	String	The symbol of the token.

Name	Type	Description
transactionHash	String	Fired right after the transaction is sent and a transaction hash is available.
receipt	Object	Fired when the transaction receipt is available. If you want to know about the properties inside the receipt object, see getTransactionReceipt. Receipts from KIP17 instances have an 'events' attribute parsed via abi instead of a 'logs' attribute.
error	Error	Fired if an error occurs during sending.

Name	Type	Description
owner	String	The address of the account who owns tokens.
index	BigNumber \| String \| Number	The index of a token in owner's token list.

Name	Type	Description
owner	String	The address of an account that owns tokens and has allowed the operator to send all its tokens.
operator	String	The address of the account approved to send owner's all tokens in place of the owner.

Name	Type	Description
to	String	The address of the account who spends tokens in place of the owner.
tokenId	BigNumber \| String \| Number	The id of the token the spender is allowed to use.
sendParam	Object	(optional) An object with defined parameters for sending a transaction.

Name	Type	Description
from	String	(optional) The address from which the transaction should be sent. If omitted, it will be set by `this.options.from`. If neither of `from` in `sendParam` object nor `this.options.from` were not provided, an error would occur.
gas	Number \| String	(optional) The maximum gas provided for this transaction (gas limit). If omitted, it will be set by caver-js via calling `this.methods.approve(spender, tokenId).estimateGas({from})`.
gasPrice	Number \| String	(optional) The gas price in peb to use for this transaction. If omitted, it will be set by caver-js via calling `caver.klay.getGasPrice`.
value	Number \| String \| BN \| BigNumber	(optional) The value to be transferred in peb.

Name	Type	Description
to	String	The address of an account to be approved/prohibited to transfer the owner's all tokens.
approved	Boolean	This operator will be approved if `true`. The operator will be disallowed if `false`.
sendParam	Object	(optional) An object with defined parameters for sending a transaction. For more information about sendParam, refer to the parameter description of approve.

Name	Type	Description
from	String	The address of the owner or the approved operator of the given token.
to	String	The address of the account to receive the token.
tokenId	BigNumber \| String \| Number	The id of the token you want to transfer.
sendParam	Object	(optional) An object with defined parameters for sending a transaction. For more information about sendParam, refer to the parameter description of approve.