caver.kct.kip7

The caver.kct.kip7 helps you easily handle a smart contract that implements KIP-7 as a JavaScript object on the Klaytn blockchain platform (Klaytn).

The caver.kct.kip7 inherits caver.contract to implement the KIP-7 token contract. The caver.kct.kip7 holds the same properties of caver.contract whereas additional methods to implement extra features. This section only introduces the newly added bound methods of the caver.kct.kip7.

The abi and bytecode used in the caver.kct.kip7 were implemented using the example of openzeppelin.

The code that implements KIP-7 for caver-js is available on the Klaytn Contracts Github Repo.

For more information about KIP-7, see Klaytn Improvement Proposals.

caver.kct.kip7.deploy

caver.kct.kip7.deploy(tokenInfo, deployer)

Deploys the KIP-7 token contract to the Klaytn blockchain. A contract deployed using caver.kct.kip7.deploy is a fungible token that follows the KIP-7 standard.

After successful deployment, the promise will be resolved with a new KIP7 instance.

Parameters

Name	Type	Description
tokenInfo	object	The information needed to deploy KIP-7 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
name	string	The name of the token.
symbol	string	The symbol of the token.
decimals	number	The number of decimal places the token uses.
initialSupply	BigNumber | string | number	The total amount of token to be supplied initially.

NOTE The initialSupply 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

PromiEvent: A promise combined event emitter, which is resolved with a new KIP7 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.kip7.deploy({
    name: 'Jasmine',
    symbol: 'JAS',
    decimals: 18,
    initialSupply: '100000000000000000000',
}, '0x{address in hex}').then(console.log)
KIP7 {
    ...
    _address: '0x598367e443D8a2b644Fec69a2C12aF44BC283f23',
    _jsonInterface: [
        ...
        {
            anonymous: false,
            inputs: [
                { indexed: true, name: 'owner', type: 'address' },
                    { indexed: true, name: 'spender', type: 'address' },
                    { indexed: false, name: 'value', type: 'uint256' }
            ],
            name: 'Approval',
            type: 'event',
            signature:  '0x8c5be...'
        }
    ] 
}

// Send object as second parameter
> caver.kct.kip7.deploy({
        name: 'Jasmine',
        symbol: 'JAS',
        decimals: 18,
        initialSupply: '100000000000000000000',
    },
    {
        from: '0x{address in hex}',
        feeDelegation: true,
        feePayer: '0x{address in hex}',
    }).then(console.log)

// using event emitter and promise
> caver.kct.kip7.deploy({
    name: 'Jasmine',
    symbol: 'JAS',
    decimals: 18,
    initialSupply: '100000',
}, '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(newKIP7Instance) {
    console.log(newKIP7Instance.options.address) // instance with the new token contract address
})

caver.kct.kip7.detectInterface

caver.kct.kip7.detectInterface(contractAddress)

Returns the information of the interface implemented by the token contract. This static function will use kip7.detectInterface.

Parameters

Name	Type	Description
contractAddress	string	The address of the KIP-7 token contract

Return Value

Promise returns an object containing the result with boolean values whether each KIP-7 interface is implemented.

Example

> caver.kct.kip7.detectInterface('0x{address in hex}').then(console.log)
{
    IKIP7: true,
    IKIP7Metadata: true,
    IKIP7Mintable: true,
    IKIP7Burnable: true,
    IKIP7Pausable: true,
}

caver.kct.kip7.create

caver.kct.kip7.create([tokenAddress])

Creates a new KIP7 instance with its bound methods and events. This function works the same as new KIP7.

NOTE caver.kct.kip7.create is supported since caver-js v1.6.1.

Parameters

See the new KIP7.

Return Value

See the new KIP7.

Example

// Create a KIP7 instance without a parameter
> const kip7 = caver.kct.kip7.create()

// Create a KIP7 instance with a token address
> const kip7 = caver.kct.kip7.create('0x{address in hex}')

new KIP7

new caver.kct.kip7([tokenAddress])

Creates a new KIP7 instance with its bound methods and events.

Parameters

Name	Type	Description
tokenAddress	string	(optional) The address of the KIP-7 token contract, which can be assigned later through kip7.options.address = '0x1234..'

Return Value

Type	Description
object	The KIP7 instance with its bound methods and events.

Example

// Create a KIP7 instance without a parameter
> const kip7 = new caver.kct.kip7()

// Create a KIP7 instance with a token address
> const kip7 = new caver.kct.kip7('0x{address in hex}')

kip7.clone

kip7.clone([tokenAddress])

Clones the current KIP7 instance.

Parameters

Name	Type	Description
tokenAddress	string	(optional) The address of the smart contract that deployed another KIP7 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 KIP7 instance.

Example

> const kip7 = new caver.kct.kip7(address)

// Clone without a parameter
> const cloned = kip7.clone()

// Clone with the address of the new token contract
> const cloned = kip7.clone('0x{address in hex}')

kip7.detectInterface

kip7.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-7 interface is implemented.

Example

> kip7.detectInterface().then(console.log)
{
    IKIP7: true,
    IKIP7Metadata: true,
    IKIP7Mintable: true,
    IKIP7Burnable: true,
    IKIP7Pausable: true,
}

kip7.supportsInterface

kip7.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

> kip7.supportsInterface('0x65787371').then(console.log)
true

> kip7.supportsInterface('0x3a2820fe').then(console.log)
false

kip7.name

kip7.name()

Return the name of the token.

Parameters

None

Return Value

Promise returns string: The name of the token.

Example

> kip7.name().then(console.log)
Jasmine

kip7.symbol

kip7.symbol()

Return the symbol of the token.

Parameters

None

Return Value

Promise returns string: The symbol of the token.

Example

> kip7.symbol().then(console.log)
JAS

kip7.decimals

kip7.decimals()

Return the number of decimal places the token uses.

Parameters

None

Return Value

Promise returns number: The number of decimal places the token uses.

Example

> kip7.decimals().then(console.log)
18

kip7.totalSupply

kip7.totalSupply()

Return the total token supply.

Parameters

None

Return Value

Promise returns BigNumber: The total number of tokens.

Example

> kip7.totalSupply().then(console.log)
100000000000000000000

kip7.balanceOf

kip7.balanceOf(address)

Return the balance of the given account address.

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

> kip7.balanceOf('0x{address in hex}').then(console.log)
100000

kip7.allowance

kip7.allowance(owner, spender)

Return the amount of token that spender is allowed to withdraw from owner.

Parameters

Name	Type	Description
owner	string	The address of the token owner's account.
spender	string	The address of the account that spends tokens in place of the owner.

Return Value

Promise returns BigNumber: The remaining number of tokens that spender is allowed to spend in place of the owner.

Example

> kip7.allowance('0x{address in hex}', '0x{address in hex}').then(console.log)
0

> kip7.allowance('0x{address in hex}', '0x{address in hex}').then(console.log)
10

kip7.isMinter

kip7.isMinter(address)

Return true if the given account is a minter who can issue new KIP7 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

> kip7.isMinter('0x{address in hex}').then(console.log)
true

> kip7.isMinter('0x{address in hex}').then(console.log)
false

kip7.isPauser

kip7.isPauser(address)

Return 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

> kip7.isPauser('0x{address in hex}').then(console.log)
true

> kip7.isPauser('0x{address in hex}').then(console.log)
false

kip7.paused

kip7.paused()

Return true if the contract is paused, and false otherwise.

Parameters

None

Return Value

Promise returns Boolean: true if the contract is paused.

Example

> kip7.paused().then(console.log)
true

> kip7.paused().then(console.log)
false

kip7.approve

kip7.approve(spender, amount [, sendParam])

Set the amount of the tokens of the token owner to be spent by the spender.

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

Parameters

Name	Type	Description
spender	string	The address of the account who spends tokens in place of the owner.
amount	BigNumber | string | number	The amount of token the spender is allowed to use.
sendParam	object	(optional) An object holding parameters that are required for sending a transaction.

NOTE The amount 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 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 kip7.options.from. If neither of from in the sendParam object nor kip7.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 kip7.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, kip7.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, kip7.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, kip7.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 KIP7 instances have an 'events' attribute parsed via ABI instead of a 'logs' attribute.

Example

// Send via a sendParam object with the from field given 
> kip7.approve('0x{address in hex}', 10, { from: '0x{address in hex}' }).then(console.log)
{
    blockHash: '0xf010a98f66b6b36943175cd5b249da54e84abed551cfa02846a2900ddab968c7',
    blocknumber: 2098,
    contractAddress: null,
    from: '0x2f7dc98bd93a0544b03d6ff428a6f4ae04b32676',
    ...
    status: true,
    to: '0x8ca777e464a83b939ae131ca037f0d8728c6929e',
    ...
    events: {
        Approval: {
            address: '0x8CA777e464a83b939AE131CA037F0d8728C6929e',
            blocknumber: 2098,
            transactionHash: '0xf7469c0420cb5ebb0fbf64a314bd0c9ee7517ea64dd72eefa59bc8005bbc0f99',
            transactionIndex: 0,
            blockHash: '0xf010a98f66b6b36943175cd5b249da54e84abed551cfa02846a2900ddab968c7',
            logIndex: 0,
            id: 'log_c6ec61aa',
            returnValues: {
                '0': '0x2f7Dc98Bd93A0544B03d6ff428a6f4ae04b32676',
                '1': '0xe36ffD7bc4D588c480B5925B9622881F9d85ea30',
                '2': '10',
                owner: '0x2f7Dc98Bd93A0544B03d6ff428a6f4ae04b32676',
                spender: '0xe36ffD7bc4D588c480B5925B9622881F9d85ea30',
                value: '10'
            },
            event: 'Approval',
            signature: '0x8c5be1e5ebec7d5bd14f71427d1e84f3dd0314c0f7b2291e5b200ac8c7c3b925',
            raw: {
                data: '0x000000000000000000000000000000000000000000000000000000000000000a',
                topics: [ '0x8c5be...', '0x00...676', '0x00...a30' ]
            },
        },
    },
}

// Using FD transaction to execute the smart contract
> kip7.approve('0x{address in hex}', 10, {
    from: '0x{address in hex}'
    feeDelegation: true,
    feePayer: '0x{address in hex}'
}).then(console.log)

// Using kip7.options.from
// If the value of kip7.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 kip7 instance.
> kip7.options.from = '0x{address in hex}'
> kip7.approve('0x{address in hex}', 10).then(console.log)

kip7.transfer

kip7.transfer(recipient, amount [, sendParam])

Transfers the given amount of the token from the token owner's balance to the recipient. The token owner should execute this token transfer with its own hands. Thus, the token owner should be the sender of this transaction whose address must be given at sendParam.from or kip7.options.from. Without sendParam.from nor kip7.options.from being provided, an error would occur.

Note that sending this transaction will charge the transaction fee to the transaction sender.

Parameters

Name	Type	Description
recipient	string	The address of the account to receive the token.
amount	BigNumber | string | number	The amount of token to be transferred.
sendParam	object

NOTE The amount 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 KIP7 instances have an 'events' attribute parsed via ABI instead of a 'logs' attribute.

Example

// Send via a sendParam object with the from field given 
> kip7.transfer('0x{address in hex}', 10, { from: '0x{address in hex}' }).then(console.log)
{
    blockHash: '0x8a078c3a73d678cdd85d471eb21e9ed7d695f8b96fc7315cfa59c1f68be3d2bf',
    blocknumber: 1353,
    contractAddress: null,
    from: '0x2f7dc98bd93a0544b03d6ff428a6f4ae04b32676',
    ...
    status: true,
    to: '0x05871c21664e18b2906545f8831695650a8f4056',
    ...
    events: {
        Transfer: {
            address: '0x05871c21664E18b2906545f8831695650a8f4056',
            blocknumber: 1353,
            transactionHash: '0x8bd2b21a06241e4cfc0af1ec40e7b15444f730c7529440648aa4ed6b697f08f4',
            transactionIndex: 0,
            blockHash: '0x8a078c3a73d678cdd85d471eb21e9ed7d695f8b96fc7315cfa59c1f68be3d2bf',
            logIndex: 0,
            id: 'log_82ef7705',
            returnValues: {
                '0': '0x2f7Dc98Bd93A0544B03d6ff428a6f4ae04b32676',
                '1': '0xE411cb0B61FDcC06497794fE3f49F65D5dE41f59',
                '2': '10',
                from: '0x2f7Dc98Bd93A0544B03d6ff428a6f4ae04b32676',
                to: '0xE411cb0B61FDcC06497794fE3f49F65D5dE41f59',
                value: '10'
            },
            event: 'Transfer',
            signature: '0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef',
            raw: {
                data: '0x000000000000000000000000000000000000000000000000000000000000000a',
                topics: [ '0xddf25...', '0x00...676', '0x00...f59' ]
            },
        },
    },
}

// Using FD transaction to execute the smart contract
> kip7.transfer('0x{address in hex}', 10, {
    from: '0x{address in hex}'
    feeDelegation: true,
    feePayer: '0x{address in hex}'
}).then(console.log)

// Using kip7.options.from
// If the value of kip7.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 kip7 instance.
> kip7.options.from = '0x{address in hex}'
> kip7.transfer('0x{address in hex}', 10).then(console.log)

kip7.safeTransfer

kip7.safeTransfer(recipient, amount [, data] [, sendParam])

Safely transfers the given amount of the token from the token owner's balance to the recipient. The token owner should execute this token transfer with its own hands. Thus, the token owner should be the sender of this transaction whose address must be given at sendParam.from or kip7.options.from. Without sendParam.from nor kip7.options.from being provided, an error would occur.

If the recipient was a contract address, it should implement IKIP7Receiver.onKIP7Received. Otherwise, the transfer is reverted.

Note that sending this transaction will charge the transaction fee to the transaction sender.

Parameters

Name	Type	Description
recipient	string	The address of the account to receive the token.
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 amount 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 KIP17 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)
> kip7.safeTransfer('0x{address in hex}', 10, { from: '0x{address in hex}' }).then(console.log)
{
    blockHash: '0x208cd64b95bbd91420fc6b1a7b514a8d3051d09333d79244b6b74ff2f7f3eee4',
    blocknumber: 2384,
    contractAddress: null,
    from: '0xc2c84328845a36fe0c4dcef370d24ec80cf85221',
    ...
    status: true,
    to: '0xe4aeba6306b0df023aa4b765960fa59dbe925950',
    ...
    events: {
            Transfer: {
                    address: '0xe4AeBa6306b0Df023AA4b765960fA59dbE925950',
                    blocknumber: 2384,
                    transactionHash: '0x47bb085947c282722c1ceab1f4f0380d911ce464a47a19f1e7bddfe08a13563d',
                    transactionIndex: 0,
                    blockHash: '0x208cd64b95bbd91420fc6b1a7b514a8d3051d09333d79244b6b74ff2f7f3eee4',
                    logIndex: 0,
                    id: 'log_58e5e06d',
                    returnValues: {
                            '0': '0xC2C84328845A36Fe0c4DcEf370d24ec80cF85221',
                            '1': '0x67B092d09B5e94fed58609777cc7Ac9193553B73',
                            '2': '10',
                            from: '0xC2C84328845A36Fe0c4DcEf370d24ec80cF85221',
                            to: '0x67B092d09B5e94fed58609777cc7Ac9193553B73',
                            value: '10',
                    },
                    event: 'Transfer',
                    signature: '0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef',
                    raw: {
                            data: '0x000000000000000000000000000000000000000000000000000000000000000a',
                            topics: [ '0xddf25...', '0x00...221', '0x00...b73' ],
                    },
            },
    },
}

// Using FD transaction to execute the smart contract
> kip7.safeTransfer('0x{address in hex}', 10, {
    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)
> kip7.safeTransfer('0x{address in hex}', 11, '0x1234', { from: '0x{address in hex}' }).then(console.log)

// Using kip7.options.from
// If the value of kip7.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 kip7 instance.
> kip7.options.from = '0x{address in hex}'
> kip7.safeTransfer('0x{address in hex}', 11).then(console.log)

kip7.transferFrom

kip7.transferFrom(sender, recipient, amount [, sendParam])

Transfers the given amount of the token from the token owner's balance to the recipient. The address who was approved to send the token owner's tokens is expected to execute this token transferring transaction. Thus, the approved one should be the sender of this transaction whose address must be given at sendParam.from or kip7.options.from. Without sendParam.from nor kip7.options.from being provided, an error would occur.

Note that sending this transaction will charge the transaction fee to the transaction sender.

Parameters

Name	Type	Description
sender	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.
amount	BigNumber | string | number	The amount of token you want to transfer.
sendParam	object

NOTE The amount 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 KIP7 instances have an 'events' attribute parsed via ABI instead of a 'logs' attribute.

Example

// Send via a sendParam object with the from field given
> kip7.transferFrom('0x{address in hex}', '0x{address in hex}', 10000, { from: '0x{address in hex}' }).then(console.log)
{
    blockHash: '0x3adec238e06a9e8d5fa09fc1e1d7c8748b64d07e89678d27e8a379a12a34974f',
    blocknumber: 2331,
    contractAddress: null,
    from: '0x01958c62ab4aec7fc282bec9491da0ef7f830ac2',
    ...
    status: true,
    to: '0x3d5eb40665d25aaa4160023c4278fa6a94ba4acb',
    ...
    events: {
        Transfer: {
            address: '0x3D5EB40665D25aAa4160023C4278FA6A94BA4aCb',
            blocknumber: 2331,
            transactionHash: '0x5b2232b68681f19d9b6fcd6fb03964ef105912fecb772c11c8ec9fc906be4cbf',
            transactionIndex: 0,
            blockHash: '0x3adec238e06a9e8d5fa09fc1e1d7c8748b64d07e89678d27e8a379a12a34974f',
            logIndex: 0,
            id: 'log_ae57b7a0',
            returnValues: {
                '0': '0x2f7Dc98Bd93A0544B03d6ff428a6f4ae04b32676',
                '1': '0x49ff9cb8BB8CA10D7f6E1094b2Ba56c3C2DBA231',
                '2': '10000',
                from: '0x2f7Dc98Bd93A0544B03d6ff428a6f4ae04b32676',
                to: '0x49ff9cb8BB8CA10D7f6E1094b2Ba56c3C2DBA231',
                value: '10000'
            },
            event: 'Transfer',
            signature: '0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef',
            raw: {
                data: '0x0000000000000000000000000000000000000000000000000000000000002710',
                topics: [ '0xddf25...', '0x00...676', '0x00...231' ]
            },
        },
        Approval: {
            address: '0x3D5EB40665D25aAa4160023C4278FA6A94BA4aCb',
            blocknumber: 2331,
            transactionHash: '0x5b2232b68681f19d9b6fcd6fb03964ef105912fecb772c11c8ec9fc906be4cbf',
            transactionIndex: 0,
            blockHash: '0x3adec238e06a9e8d5fa09fc1e1d7c8748b64d07e89678d27e8a379a12a34974f',
            logIndex: 1,
            id: 'log_cee37d26',
            returnValues: {
                '0': '0x2f7Dc98Bd93A0544B03d6ff428a6f4ae04b32676',
                '1': '0x01958c62aB4aEC7fC282bEc9491dA0EF7F830AC2',
                '2': '0',
                owner: '0x2f7Dc98Bd93A0544B03d6ff428a6f4ae04b32676',
                spender: '0x01958c62aB4aEC7fC282bEc9491dA0EF7F830AC2',
                value: '0'
            },
            event: 'Approval',
            signature: '0x8c5be1e5ebec7d5bd14f71427d1e84f3dd0314c0f7b2291e5b200ac8c7c3b925',
            raw: {
                data: '0x0000000000000000000000000000000000000000000000000000000000000000',
                topics: [ '0x8c5be...', '0x00...676', '0x00...ac2' ]
            },
        },
    },
}

// Using FD transaction to execute the smart contract
> kip7.transferFrom('0x{address in hex}', '0x{address in hex}', 10000, {
    from: '0x{address in hex}'
    feeDelegation: true,
    feePayer: '0x{address in hex}'
}).then(console.log)

// Using kip7.options.from
// If the value of kip7.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 kip7 instance.
> kip7.options.from = '0x{address in hex}'
> kip7.transferFrom('0x{address in hex}', '0x{address in hex}', 10000).then(console.log)

kip7.safeTransferFrom

kip7.safeTransferFrom(sender, recipient, amount [, data] [, sendParam])

Safely transfers the given amount of the token from the token owner's balance to the recipient. The address who was approved to send the token owner's tokens is expected to execute this token transferring transaction. Thus, the approved one should be the sender of this transaction whose address must be given at sendParam.from or kip7.options.from. Without sendParam.from nor kip7.options.from being provided, an error would occur.

If the recipient was a contract address, it should implement IKIP7Receiver.onKIP7Received. Otherwise, the transfer is reverted.

Note that sending this transaction will charge the transaction fee to the transaction sender.

Parameters

Name	Type	Description
sender	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.
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 amount 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 KIP17 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)
> kip7.safeTransferFrom('0x{address in hex}', '0x{address in hex}', 10000, { from: '0x{address in hex}' }).then(console.log)
{
    blockHash: '0x0d641b9cebb032f10348288623898f8aa319faa0845c5b3b7a59ac397a6a218b',
    blocknumber: 2404,
    contractAddress: null,
    from: '0x090937f5c9b83d961da29149a3c37104bc5e71b3',
    ...
    status: true,
    to: '0xe4aeba6306b0df023aa4b765960fa59dbe925950',
    ...
    events: {
            Transfer: {
                    address: '0xe4AeBa6306b0Df023AA4b765960fA59dbE925950',
                    blocknumber: 2404,
                    transactionHash: '0xed8c33facaea963f57c268134aaab48fa765e7298fd70d4bc796b1e93c12ad45',
                    transactionIndex: 0,
                    blockHash: '0x0d641b9cebb032f10348288623898f8aa319faa0845c5b3b7a59ac397a6a218b',
                    logIndex: 0,
                    id: 'log_5eaef2c3',
                    returnValues: {
                            '0': '0xC2C84328845A36Fe0c4DcEf370d24ec80cF85221',
                            '1': '0x67B092d09B5e94fed58609777cc7Ac9193553B73',
                            '2': '10000',
                            from: '0xC2C84328845A36Fe0c4DcEf370d24ec80cF85221',
                            to: '0x67B092d09B5e94fed58609777cc7Ac9193553B73',
                            value: '10000',
                    },
                    event: 'Transfer',
                    signature: '0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef',
                    raw: {
                            data: '0x0000000000000000000000000000000000000000000000000000000000002710',
                            topics: [ '0xddf25...', '0x00...221', '0x00...b73' ],
                    },
            },
            Approval: {
                    address: '0xe4AeBa6306b0Df023AA4b765960fA59dbE925950',
                    blocknumber: 2404,
                    transactionHash: '0xed8c33facaea963f57c268134aaab48fa765e7298fd70d4bc796b1e93c12ad45',
                    transactionIndex: 0,
                    blockHash: '0x0d641b9cebb032f10348288623898f8aa319faa0845c5b3b7a59ac397a6a218b',
                    logIndex: 1,
                    id: 'log_3f3aedf8',
                    returnValues: {
                            '0': '0xC2C84328845A36Fe0c4DcEf370d24ec80cF85221',
                            '1': '0x090937f5C9B83d961da29149a3C37104Bc5e71B3',
                            '2': '0',
                            owner: '0xC2C84328845A36Fe0c4DcEf370d24ec80cF85221',
                            spender: '0x090937f5C9B83d961da29149a3C37104Bc5e71B3',
                            value: '0',
                    },
                    event: 'Approval',
                    signature: '0x8c5be1e5ebec7d5bd14f71427d1e84f3dd0314c0f7b2291e5b200ac8c7c3b925',
                    raw: {
                            data: '0x0000000000000000000000000000000000000000000000000000000000000000',
                            topics: [ '0x8c5be...', '0x00...221', '0x00...1b3' ],
                    },
            },
    },
}

// Using FD transaction to execute the smart contract
> kip7.safeTransferFrom('0x{address in hex}', '0x{address in hex}', 10000, {
    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)
> kip7.safeTransferFrom('0x{address in hex}', '0x{address in hex}', 11, '0x1234', { from: '0x{address in hex}' }).then(console.log)

// Using kip7.options.from
// If the value of kip7.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 kip7 instance.
> kip7.options.from = '0x{address in hex}'
> kip7.safeTransferFrom('0x{address in hex}', '0x{address in hex}', 11).then(console.log)

kip7.mint

kip7.mint(account, amount [, sendParam])

Creates the amount of token and issues it to the account, increasing the total supply of token.

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
account	string	The address of the account to which the minted token will be issued.
amount	BigNumber | string | number	The amount of token to be minted.
sendParam	object

NOTE The amount 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.

NOTE If sendParam.from or kip7.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 KIP7 instances have an 'events' attribute parsed via ABI instead of a 'logs' attribute.

Example

// Send via a sendParam object with the from field given 
> kip7.mint('0x{address in hex}', 10000, { from: '0x{address in hex}' }).then(console.log)
{
    blockHash: '0x71e1c7c9de471ed9eb9ec2aca09beb63a654e21514b2b8d25ec93f34b810a709',
    blocknumber: 8466,
    contractAddress: null,
    from: '0x2f7dc98bd93a0544b03d6ff428a6f4ae04b32676',
    ...
    status: true,
    to: '0x54e9ad10ffcbcc2384863157c851a75a31c1e925',
    ...
    events: {
        Transfer: {
            address: '0x54e9Ad10FFcBCc2384863157c851A75a31C1E925',
            blocknumber: 8466,
            transactionHash: '0xef1db1544d0ba70aa06b77599a8421cee2270703cff7d0233bd09ab3561ab49a',
            transactionIndex: 0,
            blockHash: '0x71e1c7c9de471ed9eb9ec2aca09beb63a654e21514b2b8d25ec93f34b810a709',
            logIndex: 0,
            id: 'log_151f8e90',
            returnValues: {
                '0': '0x0000000000000000000000000000000000000000',
                '1': '0x4756D3c2A3DC61450D949BD9bF702b4209Fc15a0',
                '2': '10000',
                from: '0x0000000000000000000000000000000000000000',
                to: '0x4756D3c2A3DC61450D949BD9bF702b4209Fc15a0',
                value: '10000',
            },
            event: 'Transfer',
            signature: '0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef',
            raw: {
                data: '0x0000000000000000000000000000000000000000000000000000000000002710',
                topics: [ '0xddf25...', '0x00...000', '0x00...5a0' ],
            },
        },
    },
}

// Using FD transaction to execute the smart contract
> kip7.mint('0x{address in hex}', 10000, {
    from: '0x{address in hex}'