caver.kct.kip37

The caver.kct.kip37 helps you easily handle a smart contract that implements KIP-37 as a JavaScript object on the Klaytn blockchain platform (Klaytn).

The caver.kct.kip37 inherits caver.contract to implement the KIP-37 token contract. The caver.kct.kip37 holds the same properties of caver.contract whereas additional methods are implemented for extra features. This section only introduces the newly added methods of the caver.kct.kip37.

The code that implements KIP-37 for caver-js is available on the Klaytn Contracts Github Repo.

For more information about KIP-37, see Klaytn Improvement Proposals.

NOTE caver.kct.kip37 is supported since caver-js v1.5.7.

caver.kct.kip37.deploy

caver.kct.kip37.deploy(tokenInfo, deployer)

Deploys the KIP-37 token contract to the Klaytn blockchain. A contract deployed using caver.kct.kip37.deploy is a multi token that follows the KIP-37 standard.

After successful deployment, the promise will be resolved with a new KIP37 instance.

Parameters

Name	Type	Description
tokenInfo	object	The information needed to deploy a KIP-37 token contract on the Klaytn blockchain. See the below table for the details.
deployer	string | object

The tokenInfo object must contain the following:

Name	Type	Description
uri	string

Return Value

PromiEvent: A promise combined event emitter, which is resolved with a new KIP37 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
error	Error	Fired if an error occurs during sending.

Example

// using the promise
> caver.kct.kip37.deploy({
    uri: 'https://caver.example/{id}.json',
}, '0x{address in hex}').then(console.log)
KIP37 {
    ...
    _address: '0x7314B733723AA4a91879b15a6FEdd8962F413CB2',
    _jsonInterface: [
        ...
        {
            anonymous: false,
            inputs: [{ indexed: false, name: 'value', type: 'string' }, { indexed: true, name: 'id', type: 'uint256' }],
            name: 'URI',
            type: 'event',
            signature: '0x6bb7ff708619ba0610cba295a58592e0451dee2622938c8755667688daf3529b',
        }
    ] 
}

// Send object as second parameter
> caver.kct.kip37.deploy({
    uri: 'https://caver.example/{id}.json',
    },
    {
        from: '0x{address in hex}',
        feeDelegation: true,
        feePayer: '0x{address in hex}',
    }).then(console.log)

// using event emitter and promise
> caver.kct.kip37.deploy({
    uri: 'https://caver.example/{id}.json',
}, '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(newKIP37Instance) {
    console.log(newKIP37Instance.options.address) // instance with the new token contract address
})

caver.kct.kip37.detectInterface

caver.kct.kip37.detectInterface(contractAddress)

Returns the information of the interface implemented by the token contract. This static function will use kip37.detectInterface.

Parameters

Name	Type	Description
contractAddress	string	The address of the KIP-37 token contract

Return Value

Promise returns an object containing the result with boolean values whether each KIP-37 interface is implemented.

Example

> caver.kct.kip37.detectInterface('0x{address in hex}').then(console.log)
{
    IKIP37: true,
    IKIP37Metadata: true,
    IKIP37Mintable: true,
    IKIP37Burnable: true,
    IKIP37Pausable: true,
}

caver.kct.kip37.create

caver.kct.kip37.create([tokenAddress])

Creates a new KIP37 instance with its bound methods and events. This function works the same as new KIP37.

NOTE caver.kct.kip37.create is supported since caver-js v1.6.1.

Parameters

See the new KIP37.

Return Value

See the new KIP37.

Example

// Create a KIP37 instance without a parameter
> const kip37 = caver.kct.kip37.create()

// Create a KIP37 instance with a token address
> const kip37 = caver.kct.kip37.create('0x{address in hex}')

new KIP37

new caver.kct.kip37([tokenAddress])

Creates a new KIP37 instance with its bound methods and events.

Parameters

Name	Type	Description
tokenAddress	string	(optional) The address of the KIP-37 token contract, which can be assigned later through kip37.options.address = '0x1234..'

Return Value

Type	Description
object	The KIP37 instance with its bound methods and events.

Example

// Create a KIP37 instance without a parameter
> const kip37 = new caver.kct.kip37()

// Create a KIP37 instance with a token address
> const kip37 = new caver.kct.kip37('0x{address in hex}')

kip37.clone

kip37.clone([tokenAddress])

Clones the current KIP37 instance.

Parameters

Name	Type	Description
tokenAddress	string	(optional) The address of the smart contract that deployed another KIP37 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 KIP37 instance.

Example

> const kip37 = new caver.kct.kip37(address)

// Clone without a parameter
> const cloned = kip37.clone()

// Clone with the address of the new token contract
> const cloned = kip37.clone('0x{address in hex}')

kip37.detectInterface

kip37.detectInterface()

Returns the information of the interface implemented by the token contract.

Parameters

None

Return Value

Promise returns an object containing the result with boolean values whether each KIP-37 interface is implemented.

Example

> kip37.detectInterface().then(console.log)
{
    IKIP37: true,
    IKIP37Metadata: true,
    IKIP37Mintable: true,
    IKIP37Burnable: true,
    IKIP37Pausable: true,
}

kip37.supportsInterface

kip37.supportsInterface(interfaceId)

Return 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

> kip37.supportsInterface('0x6433ca1f').then(console.log)
true

> kip37.supportsInterface('0x3a2820fe').then(console.log)
false

kip37.uri

kip37.uri(id)

Returns distinct Uniform Resource Identifier (URI) of the given token.

If the string "{id}" exists in any URI, this function will replace this with the actual token ID in hexadecimal form. Please refer to KIP-34 Metadata.

Parameters

Name	Type	Description
id	BigNumber | string | number	The token id to get uri.

NOTE The id 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 token.

Example

> kip37.uri('0x0').then(console.log)
'https://caver.example/0000000000000000000000000000000000000000000000000000000000000000.json'

kip37.totalSupply

kip37.totalSupply(id)

Returns the total token supply of the specific token.

Parameters

Name	Type	Description
id	BigNumber | string | number	The token id to see the total supply.

NOTE The id 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 total number of tokens.

Example

> kip37.totalSupply(0).then(console.log)
10000000000

kip37.balanceOf

kip37.balanceOf(account, id)

Returns the amount of tokens of token type id owned by account.

Parameters

Name	Type	Description
account	string	The address of the account for which you want to see balance.
id	BigNumber | string | number	The token id to see balance.

NOTE The id 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 amount of token that account has.

Example

> kip37.balanceOf('0x{address in hex}', 0).then(console.log)
20

kip37.balanceOfBatch

kip37.balanceOfBatch(accounts, ids)

Returns the balance of multiple account/token pairs. balanceOfBatch is a batch operation of balanceOf, and the length of arrays with accounts and ids must be the same.

Parameters

Name	Type	Description
accounts	Array	The address of the account for which you want to see balance.
ids	Array	An array of the token ids to see balance.

Return Value

Promise returns Array: The balance of multiple account/token pairs.

Example

> kip37.balanceOfBatch(['0x{address in hex}', '0x{address in hex}'], [0, 1]).then(console.log)
[ 20, 30 ]

kip37.isMinter

kip37.isMinter(address)

Returns true if the given account is a minter who can issue new KIP37 tokens.

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

> kip37.isMinter('0x{address in hex}').then(console.log)
true

> kip37.isMinter('0x{address in hex}').then(console.log)
false

kip37.isPauser

kip37.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

> kip37.isPauser('0x{address in hex}').then(console.log)
true

> kip37.isPauser('0x{address in hex}').then(console.log)
false

kip37.paused

kip37.paused()

Returns whether or not the token contract's transaction (or specific token) is paused.

If id parameter is not defined, return whether the token contract's transaction is paused. If id parameter is defined, return whether the specific token is paused.

Parameters

Name	Type	Description
id	BigNumber | string | number	(optional) The token id to check wether paused or not. If this parameter is omitted, the paused function return whether the contract is in paused state.

NOTE The id 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 boolean: true if the contract (or specific token) is paused.

Example

// without token id parameter
> kip37.paused().then(console.log)
true
> kip37.paused().then(console.log)
false

// with token id parameter
> kip37.paused(0).then(console.log)
true
> kip37.paused(1).then(console.log)
false

kip37.isApprovedForAll

kip37.isApprovedForAll(owner, operator)

Queries the approval status of an operator for a given owner. Returns true if an operator is approved by a given owner.

Parameters

Name	Type	Description
owner	string	The address of the owner.
operator	string	The address of the operator.

Return Value

Promise returns boolean: True if the operator is approved, false if not

Example

> kip37.isApprovedForAll('0x{address in hex}', '0x{address in hex}').then(console.log)
true

> kip37.isApprovedForAll('0x{address in hex}', '0x{address in hex}').then(console.log)
false

kip37.create

kip37.create(id, initialSupply [, uri] [, sendParam])

Creates a new token type and assigns initialSupply to the minter.

Note that this method will submit a transaction to the Klaytn network, which will charge the transaction fee to the transaction sender.

Parameters

Name	Type	Description
id	BigNumber | string | number	The token id to create.
initialSupply	BigNumber | string | number	The amount of tokens being minted.
uri	string	(optional) The token URI of the created token.
sendParam	object	(optional) An object holding parameters that are required for sending a transaction.

NOTE The id, initialSupply parameters accept 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 contains the following:

Name	Type	Description
from	string	(optional) The address from which the transaction should be sent. If omitted, it will be set by kip37.options.from. If neither of from in the sendParam object nor kip37.options.from were not provided, an error would occur.
gas	number | string	(optional) The maximum number of gas provided for this transaction (gas limit). If omitted, it will be set by caver-js via calling kip37.methods.approve(spender, amount).estimateGas({from}).
gasPrice	number | string	(optional) The gas price in peb 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.
feeDelegation	boolean	(optional, default false) Whether to use fee delegation transaction. If omitted, kip37.options.feeDelegation will be used. If both omitted, fee delegation is not used.
feePayer	string	(optional) The address of the fee payer paying the transaction fee. When feeDelegation is true, the value is set to the feePayer field in the transaction. If omitted, kip37.options.feePayer will be used. If both omitted, throws an error.
feeRatio	string	(optional) The ratio of the transaction fee the fee payer will be burdened with. If feeDelegation is true and feeRatio is set to a valid value, a partial fee delegation transaction is used. The valid range of this is between 1 and 99. The ratio of 0, or 100 and above are not allowed. If omitted, kip37.options.feeRatio will be used.

NOTE feeDelegation, feePayer and feeRatio are supported since caver-js v1.6.1.

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 KIP37 instances have an 'events' attribute parsed via ABI instead of a 'logs' attribute.

Example

// Send via a sendParam object with the from field given 
> kip37.create(2, '1000000000000000000', { from: '0x{address in hex}' }).then(console.log)
{
    blockHash: '0xf1cefd8efbde83595742dc88308143dde50e7bee39a3a0cfea92ed5df3529d61',
    blocknumber: 2823,
    contractAddress: null,
    from: '0xfb8789cd544881f820fbff1728ba7c240a539f48',
    ...
    status: true,
    to: '0x394091d163ebdebcae876cb96cf0e0984c28a1e9',
    ...
    events: {
        TransferSingle: {
            address: '0x394091D163eBDEbcAe876cb96CF0E0984C28a1e9',
            blockNumber: 2823,
            transactionHash: '0xee8cdaa0089681d90a52c1539e75c6e26b3eb67affd4fbf70033ba010a3f0d26',
            transactionIndex: 0,
            blockHash: '0xf1cefd8efbde83595742dc88308143dde50e7bee39a3a0cfea92ed5df3529d61',
            logIndex: 0,
            id: 'log_ca64e74b',
            returnValues: {
                '0': '0xfb8789cD544881F820Fbff1728Ba7c240a539F48',
                '1': '0x0000000000000000000000000000000000000000',
                '2': '0xfb8789cD544881F820Fbff1728Ba7c240a539F48',
                '3': '2',
                '4': '1000000000000000000',
                operator: '0xfb8789cD544881F820Fbff1728Ba7c240a539F48',
                from: '0x0000000000000000000000000000000000000000',
                to: '0xfb8789cD544881F820Fbff1728Ba7c240a539F48',
                id: '2',
                value: '1000000000000000000',
            },
            event: 'TransferSingle',
            signature: '0xc3d58168c5ae7397731d063d5bbf3d657854427343f4c083240f7aacaa2d0f62',
            raw: {
                data: '0x...40000',
                topics: [ '0xc3d58...', '0x00...f48', '0x00...000', '0x00...f48' ],
            },
        },
    },
}

// Using FD transaction to execute the smart contract
> kip37.create(2, '1000000000000000000', {
    from: '0x{address in hex}'
    feeDelegation: true,
    feePayer: '0x{address in hex}'
}).then(console.log)

// Using kip37.options.from
// If the value of kip37.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 kip37 instance.
> kip37.options.from = '0x{address in hex}'
> kip37.create(2, '1000000000000000000').then(console.log)

kip37.setApprovalForAll

kip37.setApprovalForAll(operator, approved [, sendParam])

Approves the given operator, or disallow the given operator, to transfer all tokens of the owner.

Note that this method will submit a transaction to the Klaytn network, which will charge the transaction fee to the transaction sender.

Parameters

Name	Type	Description
operator	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

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 KIP37 instances have an 'events' attribute parsed via ABI instead of a 'logs' attribute.

Example

// Send via a sendParam object with the from field given 
> kip37.setApprovalForAll('0x{address in hex}', true, { from: '0x{address in hex}' }).then(console.log)
{
    blockHash: '0x0ee7be40f8b9f4d93d68235acef9fba08fde392a93a1a1743243cb9686943a47',
    blockNumber: 3289,
    contractAddress: null,
    from: '0xfb8789cd544881f820fbff1728ba7c240a539f48',
    ...
    status: true,
    to: '0x394091d163ebdebcae876cb96cf0e0984c28a1e9',
    ...
    events: {
        ApprovalForAll: {
            address: '0x394091D163eBDEbcAe876cb96CF0E0984C28a1e9',
            blockNumber: 3289,
            transactionHash: '0x5e94aa4af5f7604f1b32129fa8463c43cae4ff118f80645bfabcc6181667b8ab',
            transactionIndex: 0,
            blockHash: '0x0ee7be40f8b9f4d93d68235acef9fba08fde392a93a1a1743243cb9686943a47',
            logIndex: 0,
            id: 'log_b1f9938f',
            returnValues: {
                '0': '0xfb8789cD544881F820Fbff1728Ba7c240a539F48',
                '1': '0xF896C5aFD69239722013aD0041EF33B5A2fDB1A6',
                '2': true,
                account: '0xfb8789cD544881F820Fbff1728Ba7c240a539F48',
                operator: '0xF896C5aFD69239722013aD0041EF33B5A2fDB1A6',
                approved: true,
            },
            event: 'ApprovalForAll',
            signature: '0x17307eab39ab6107e8899845ad3d59bd9653f200f220920489ca2b5937696c31',
            raw: {
                data: '0x00...001',
                topics: [ '0x17307...', '0x00...f48', '0x00...1a6' ],
            },
        },
    },
}

// Using FD transaction to execute the smart contract
> kip37.setApprovalForAll('0x{address in hex}', true, {
    from: '0x{address in hex}'
    feeDelegation: true,
    feePayer: '0x{address in hex}'
}).then(console.log)

// Using kip37.options.from
// If the value of kip37.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 kip37 instance.
> kip37.options.from = '0x{address in hex}'
> kip37.setApprovalForAll('0x{address in hex}', true).then(console.log)

kip37.safeTransferFrom

kip37.safeTransferFrom(from, recipient, id, amount, data [, sendParam])

Safely transfers the given amount tokens of specific token type id from from to the recipient.

The address that was authorized to send the owner's token (the operator) or the token owner him/herself is expected to execute this token transfer transaction. Thus, an authorized address or the token owner should be the sender of this transaction whose address must be given at sendParam.from or kip37.options.from. Unless both sendParam.from and kip37.options.from are provided, an error would occur.

If the recipient was a contract address, it should implement IKIP37Receiver.onKIP37Received. Otherwise, the transfer is reverted.

Note that this method will submit a transaction to the Klaytn network, which will charge the transaction fee to the transaction sender.

Parameters

Name	Type	Description
from	string	The address of the account that owns the token to be sent with allowance mechanism.
recipient	string	The address of the account to receive the token.
id	BigNumber | string | number	The token id to transfer.
amount	BigNumber | string | number	The amount of token you want to transfer.
data	Buffer | string | number	(optional) The optional data to send along with the call.
sendParam	object

NOTE The id and amount parameters accept 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 KIP37 instances have an 'events' attribute parsed via ABI instead of a 'logs' attribute.

Example

// Send via a sendParam object with the from field given (without data)
> kip37.safeTransferFrom('0x{address in hex}', '0x{address in hex}', 2, 10000, { from: '0x{address in hex}' }).then(console.log)
{
    blockHash: '0x7dbe4c5bd916ad1aafef87fe6c8b32083080df4ec07f26b6c7a487bb3cc1cf64',
    blocknumber: 3983,
    contractAddress: null,
    from: '0xfb8789cd544881f820fbff1728ba7c240a539f48',
    ...
    status: true,
    to: '0x394091d163ebdebcae876cb96cf0e0984c28a1e9',
    ...
    events: {
        TransferSingle: {
            address: '0x394091D163eBDEbcAe876cb96CF0E0984C28a1e9',
            blockNumber: 3983,
            transactionHash: '0x0efc60b88fc55ef37eafbd18057404334dfd595ce4c2c0ff75f0922b928735e7',
            transactionIndex: 0,
            blockHash: '0x7dbe4c5bd916ad1aafef87fe6c8b32083080df4ec07f26b6c7a487bb3cc1cf64',
            logIndex: 0,
            id: 'log_cddf554f',
            returnValues: {
                '0': '0xfb8789cD544881F820Fbff1728Ba7c240a539F48',
                '1': '0xfb8789cD544881F820Fbff1728Ba7c240a539F48',
                '2': '0xF896C5aFD69239722013aD0041EF33B5A2fDB1A6',
                '3': '2',
                '4': '1000',
                operator: '0xfb8789cD544881F820Fbff1728Ba7c240a539F48',
                from: '0xfb8789cD544881F820Fbff1728Ba7c240a539F48',
                to: '0xF896C5aFD69239722013aD0041EF33B5A2fDB1A6',
                id: '2',
                value: '1000',
            },
            event: 'TransferSingle',
            signature: '0xc3d58168c5ae7397731d063d5bbf3d657854427343f4c083240f7aacaa2d0f62',
            raw: {
                data: '0x00...3e8',
                topics: [ '0xc3d58...', '0x00...f48', '0x00...f48', '0x00...1a6' ],
            },
        },
    },
}

// Using FD transaction to execute the smart contract
> kip37.safeTransferFrom('0x{address in hex}', '0x{address in hex}', 2, 10000, true, {
    from: '0x{address in hex}'
    feeDelegation: true,
    feePayer: '0x{address in hex}'
}).then(console.log)

// Send via a sendParam object with the from field given (with data)
> kip37.safeTransferFrom('0x{address in hex}', '0x{address in hex}', 2, 10000, 'data' { from: '0x{address in hex}' }).then(console.log)

// Using kip37.options.from
// If the value of kip37.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 kip37 instance.
> kip37.options.from = '0x{address in hex}'
> kip37.safeTransferFrom('0x{address in hex}', '0x{address in hex}', 2, 10000).then(console.log)

kip37.safeBatchTransferFrom

kip37.safeBatchTransferFrom(from, recipient, ids, amounts, data [, sendParam])

Safely batch transfers of multiple token ids and values from from to the recipient.

The address that was approved to send the owner's token (the operator) or the token owner him/herself is expected to execute this token transfer transaction. Thus, an approved address or the token owner should be the sender of this transaction whose address must be given at sendParam.from or kip37.options.from. Unless both sendParam.from and kip37.options.from are provided, an error would occur.

If the recipient was a contract address, it should implement IKIP37Receiver.onKIP37Received. Otherwise, the transfer is reverted.

Note that this method will submit a transaction to the Klaytn network, which will charge the transaction fee to the transaction sender.

Parameters

Name	Type	Description
from	string	The address of the account that owns the token to be sent with allowance mechanism.
recipient	string	The address of the account to receive the token.
ids	Array	An array of the token ids to transfer.
amounts	Array	An array of the token amounts you want to transfer.
data	Buffer | string | number	(optional) The optional The data to send along with the call.
sendParam	object

NOTE The ids and amounts array parameters accept number type as an element in array, 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 KIP37 instances have an 'events' attribute parsed via ABI instead of a 'logs' attribute.

Example

// Send via a sendParam object with the from field given (without data)
> kip37.safeBatchTransferFrom('0x{address in hex}', '0x{address in hex}', [1, 2], [10, 1000], { from: '0x{address in hex}' }).then(console.log)
{
    blockHash: '0x9e469494463a02ec4f9e2530e014089d6be3146a5485161a530a8e6373d472a6',
    blocknumber: 4621,
    contractAddress: null,
    from: '0xfb8789cd544881f820fbff1728ba7c240a539f48',
    ...
    status: true,
    to: '0x394091d163ebdebcae876cb96cf0e0984c28a1e9',
    ...
    events: {
        TransferBatch: {
            address: '0x394091D163eBDEbcAe876cb96CF0E0984C28a1e9',
            blockNumber: 4621,
            transactionHash: '0x557213eef8ae096bc35f5b3bee0e7cf87ecd87129b4a16d4e35a7356c341dad8',
            transactionIndex: 0,
            blockHash: '0x9e469494463a02ec4f9e2530e014089d6be3146a5485161a530a8e6373d472a6',
            logIndex: 0,
            id: 'log_b050bacc',
            returnValues: {
                '0': '0xfb8789cD544881F820Fbff1728Ba7c240a539F48',
                '1': '0xfb8789cD544881F820Fbff1728Ba7c240a539F48',
                '2': '0xF896C5aFD69239722013aD0041EF33B5A2fDB1A6',
                '3': ['1', '2'],
                '4': ['10', '1000'],
                operator: '0xfb8789cD544881F820Fbff1728Ba7c240a539F48',
                from: '0xfb8789cD544881F820Fbff1728Ba7c240a539F48',
                to: '0xF896C5aFD69239722013aD0041EF33B5A2fDB1A6',
                ids: ['1', '2'],
                values: ['10', '1000'],
            },
            event: 'TransferBatch',
            signature: '0x4a39dc06d4c0dbc64b70af90fd698a233a518aa5d07e595d983b8c0526c8f7fb',
            raw: {
                data: '0x00...3e8',
                topics: [ '0x4a39d...', '0x00...f48', '0x00...f48', '0x00...1a6' ],
            },
        },
    },
}

// Using FD transaction to execute the smart contract
> kip37.safeBatchTransferFrom('0x{address in hex}', '0x{address in hex}', [1, 2], [10, 1000], {
    from: '0x{address in hex}'
    feeDelegation: true,
    feePayer: '0x{address in hex}'
}).then(console.log)

// Send via a sendParam object with the from field given (with data)
> kip37.safeBatchTransferFrom('0x{address in hex}', '0x{address in hex}', [1, 2], [10, 1000], 'data', { from: '0x{address in hex}' }).then(console.log)

// Using kip37.options.from
// If the value of kip37.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 kip37 instance.
> kip37.options.from = '0x{address in hex}'
> kip37.safeBatchTransferFrom('0x{address in hex}', '0x{address in hex}', [1, 2], [10, 1000]).then(console.log)

kip37.mint

kip37.mint(to, id, value [, sendParam])

Mints the token of the specific token type id and assigns the tokens according to the variables to and value. The mint function allows you to mint specific token to multiple accounts at once by passing arrays to to and value as parameters.

Note that this method will submit a transaction to the Klaytn network, which will charge the transaction fee to the transaction sender.

Parameters

Name	Type	Description
to	string | Array	An address of the account or an array of addresses to which the minted token will be issued.
id	BigNumber | string | number	The token id to mint.
value	BigNumber | string | number | Array	The amount of token to be minted. If an array containing multiple addresses is delivered to to parameter, the value must be delivered in the form of an array.
sendParam	object

NOTE The id and value parameters accept 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.

NOTE If sendParam.from or kip37.options.from were given, it should be a minter with MinterRole.

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 KIP37 instances have an 'events' attribute parsed via ABI instead of a 'logs' attribute.

Example

// Send via a sendParam object with the from field given (Mint the specific tokens to a account)
> kip37.mint('0x{address in hex}', 2, 1000, { from: '0x{address in hex}' }).then(console.log)
{
    blockHash: '0xca4489a003dc781645475b7db11106da61b7438d86910920f953d8b2dab4a701',
    blocknumber: 12868,
    contractAddress: null,
    from: '0xfb8789cd544881f820fbff1728ba7c240a539f48',
    ...
    status: true,
    to: '0x394091d163ebdebcae876cb96cf0e0984c28a1e9',
    ...
    events: {
        TransferSingle: {
            address: '0x394091D163eBDEbcAe876cb96CF0E0984C28a1e9',
            blockNumber: 12868,
            transactionHash: '0xed25e305904e6efb613a6fe8b7370488554f6508b6701e9a0167c95d341c73dc',
            transactionIndex: 0,
            blockHash: '0xca4489a003dc781645475b7db11106da61b7438d86910920f953d8b2dab4a701',
            logIndex: 0,
            id: 'log_04dffde1',
            returnValues: {
                '0': '0xfb8789cD544881F820Fbff1728Ba7c240a539F48',
                '1': '0x0000000000000000000000000000000000000000',
                '2': '0xF896C5aFD69239722013aD0041EF33B5A2fDB1A6',
                '3': '2',
                '4': '1000',
                operator: '0xfb8789cD544881F820Fbff1728Ba7c240a539F48',
                from: '0x0000000000000000000000000000000000000000',
                to: '0xF896C5aFD69239722013aD0041EF33B5A2fDB1A6',
                id: '2',
                value: '1000',
            },
            event: 'TransferSingle',
            signature: '0xc3d58168c5ae7397731d063d5bbf3d657854427343f4c083240f7aacaa2d0f62',
            raw: {
                data: '0x00...3e8',
                topics: [ '0xc3d58...', '0x00...f48', '0x00...000', '0x00...1a6' ],
            },
        },
    },
}

// Send via a sendParam object with the from field given (Mint the specific tokens to the multiple accounts)
> kip37.mint(['0x{address in hex}', '0x{address in hex}'], 2, [1, 2], { from: '0x{address in hex}' }).then(console.log)
{
    blockHash: '0x2bf06d039e2e08c611117167df6261d1feebb12afb34fcabdda59fef2298c70f',
    blocknumber: 13378,
    contractAddress: null,
    from: '0xfb8789cd544881f820fbff1728ba7c240a539f48',
    ...
    status: true,
    to: '0x394091d163ebdebcae876cb96cf0e0984c28a1e9',
    ...
    events: {
        TransferSingle: [
            {
                address: '0x394091D163eBDEbcAe876cb96CF0E0984C28a1e9',
                blockNumber: 13378,
                transactionHash: '0x9b367625572145d27f78c00cd18cf294883f7baced9d495e1004275ba35e0ea9',
                transactionIndex: 0,
                blockHash: '0x2bf06d039e2e08c611117167df6261d1feebb12afb34fcabdda59fef2298c70f',
                logIndex: 0,
                id: 'log_6975145c',
                returnValues: {
                    '0': '0xfb8789cD544881F820Fbff1728Ba7c240a539F48',
                    '1': '0x0000000000000000000000000000000000000000',
                    '2': '0xF896C5aFD69239722013aD0041EF33B5A2fDB1A6',
                    '3': '2',
                    '4': '1',
                    operator: '0xfb8789cD544881F820Fbff1728Ba7c240a539F48',
                    from: '0x0000000000000000000000000000000000000000',
                    to: '0xF896C5aFD69239722013aD0041EF33B5A2fDB1A6',
                    id: '2',
                    value: '1',
                },
                event: 'TransferSingle',
                signature: '0xc3d58168c5ae7397731d063d5bbf3d657854427343f4c083240f7aacaa2d0f62',
                raw: {
                    data: '0x00...001',
                    topics: [ '0xc3d58...', '0x00...f48', '0x00...000', '0x00...1a6' ],
                },
            },
            {
                address: '0x394091D163eBDEbcAe876cb96CF0E0984C28a1e9',
                blockNumber: 13378,
                transactionHash: '0x9b367625572145d27f78c00cd18cf294883f7baced9d495e1004275ba35e0ea9',
                transactionIndex: 0,
                blockHash: '0x2bf06d039e2e08c611117167df6261d1feebb12afb34fcabdda59fef2298c70f',
                logIndex: 1,
                id: 'log_7fcd4837',
                returnValues: {
                    '0': '0xfb8789cD544881F820Fbff1728Ba7c240a539F48',
                    '1': '0x0000000000000000000000000000000000000000',
                    '2': '0xEc38E4B42c79299bFef43c3e5918Cdef482703c4',
                    '3': '2',
                    '4': '2',
                    operator: '0xfb8789cD544881F820Fbff1728Ba7c240a539F48',
                    from: '0x0000000000000000000000000000000000000000',
                    to: '0xEc38E4B42c79299bFef43c3e5918Cdef482703c4',
                    id: '2',
                    value: '2',
                },
                event: 'TransferSingle',
                signature: '0xc3d58168c5ae7397731d063d5bbf3d657854427343f4c083240f7aacaa2d0f62',
                raw: {
                    data: '0x000...002',
                    topics: [ '0xc3d58...', '0x00...f48', '0x00...000', '0x00...3c4' ],
                },
            },
        ],
    },
}

// Using FD transaction to execute the smart contract
> kip37.mint('0x{address in hex}', 2, 1000, {
    from: '0x{address in hex}'
    feeDelegation: true,
    feePayer: '0x{address in hex}'
}).then(console.log)

// Using kip37.options.from
// If the value of kip37.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 kip37 instance.
> kip37.options.from = '0x{address in hex}'
> kip37.mint('0x{address in hex}', 2, 1000)