caver.abi
caver-klay-abi 패키지는 ABI(Application Binary Interface)의 매개변수를 디코딩 및 인코딩할 수 있게 해줍니다. 배포된 스마트 컨트랙트의 함수를 호출하는 데 사용됩니다.
encodeFunctionSignature
caver.abi.encodeFunctionSignature(functionSignature)파라미터 타입을 포함한 함수 이름의 sha3 해시의 첫 4바이트인 ABI 서명으로 함수 서명을 인코딩합니다.
Parameters
Return Value
Examples
// From a JSON interface object
> caver.abi.encodeFunctionSignature({
name: 'myMethod',
type: 'function',
inputs: [{
type: 'uint256',
name: 'myNumber'
},{
type: 'string',
name: 'mystring'
}]
})
'0x24ee0097'
// From a function signature
> caver.abi.encodeFunctionSignature('myMethod(uint256,string)')
'0x24ee0097'encodeEventSignature
caver.abi.encodeEventSignature(eventSignature)입력 파라미커 타입을 포함한 이벤트 이름의 sha3 해시의 ABI 서명으로 이벤트 서명을 인코딩합니다.
Parameters
Return Value
Examples
// From a JSON interface object
> caver.abi.encodeEventSignature({
name: 'myEvent',
type: 'event',
inputs: [{
type: 'uint256',
name: 'myNumber'
},{
type: 'bytes32',
name: 'myBytes'
}]
})
'0xf2eeb729e636a8cb783be044acf6b7b1e2c5863735b60d6daae84c366ee87d97'
// From an event signature
> caver.abi.encodeEventSignature('myEvent(uint256,bytes32)')
'0xf2eeb729e636a8cb783be044acf6b7b1e2c5863735b60d6daae84c366ee87d97'encodeParameter
caver.abi.encodeParameter(type, parameter)타입에 따라 매개변수를 ABI 표현으로 인코딩합니다.
Parameters
참고 ``는 caver-js v1.6.0부터 지원됩니다. tuple 타입에 대한 자세한 정보는 Solidity Docs에서 확인할 수 있습니다.
Return Value
Examples
> caver.abi.encodeParameter('uint256', '2345675643')
'0x000000000000000000000000000000000000000000000000000000008bd02b7b'
> caver.abi.encodeParameter('bytes32', caver.utils.rightPad('0xdf3234', 64))
'0xdf32340000000000000000000000000000000000000000000000000000000000'
> caver.abi.encodeParameter('bytes', '0xdf3234')
'0x00000000000000000000000000000000000000000000000000000000000000200000000000000000000000000000000000000000000000000000000000000003df32340000000000000000000000000000000000000000000000000000000000'
> caver.abi.encodeParameter('bytes32[]', [caver.utils.rightPad('0xdf3234', 64), caver.utils.rightPad('0xfdfd', 64)])
'0x00000000000000000000000000000000000000000000000000000000000000200000000000000000000000000000000000000000000000000000000000000002df32340000000000000000000000000000000000000000000000000000000000fdfd000000000000000000000000000000000000000000000000000000000000'
> caver.abi.encodeParameter('tuple(bytes32,bool)', ['0xabdef18710a18a18abdef18710a18a18abdef18710a18a18abdef18710a18a18', true])
'0xabdef18710a18a18abdef18710a18a18abdef18710a18a18abdef18710a18a180000000000000000000000000000000000000000000000000000000000000001'
> caver.abi.encodeParameter(
{
components: [{ name: 'a', type: 'bytes32' }, { name: 'b', type: 'bool' }],
name: 'tupleExample',
type: 'tuple',
},
['0xabdef18710a18a18abdef18710a18a18abdef18710a18a18abdef18710a18a18', true]
)
'0xabdef18710a18a18abdef18710a18a18abdef18710a18a18abdef18710a18a180000000000000000000000000000000000000000000000000000000000000001'encodeParameters
caver.abi.encodeParameters(typesArray, parameters)JSON 인터페이스 객체를 기반으로 함수 매개변수를 인코딩합니다.
Parameters
NOTE tuple type is supported since caver-js v1.6.0. For more details about tuple type, please refer to Solidity Docs.
Return Value
Examples
> caver.abi.encodeParameters(['uint256','string'], ['2345675643', 'Hello!%'])
'0x000000000000000000000000000000000000000000000000000000008bd02b7b0000000000000000000000000000000000000000000000000000000000000040000000000000000000000000000000000000000000000000000000000000000748656c6c6f212500000000000000000000000000000000000000000000000000'
> caver.abi.encodeParameters(['uint8[]','bytes32'], [['34','255'], caver.utils.rightPad('0x324567fff', 64)])
'0x0000000000000000000000000000000000000000000000000000000000000040324567fff00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000002000000000000000000000000000000000000000000000000000000000000002200000000000000000000000000000000000000000000000000000000000000ff'
> caver.abi.encodeParameters(
['tuple(bytes32,bool)', 'tuple(bool,address)'],
[
['0xabdef18710a18a18abdef18710a18a18abdef18710a18a18abdef18710a18a18', true],
[true, '0x77656c636f6d6520746f20657468657265756d2e']
]
)
'0xabdef18710a18a18abdef18710a18a18abdef18710a18a18abdef18710a18a180000000000000000000000000000000000000000000000000000000000000001000000000000000000000000000000000000000000000000000000000000000100000000000000000000000077656c636f6d6520746f20657468657265756d2e'
> caver.abi.encodeParameters(
[
{
components: [{ name: 'a', type: 'bytes32' }, { name: 'b', type: 'bool' }],
name: 'tupleExample',
type: 'tuple',
},
{
components: [{ name: 'c', type: 'bool' }, { name: 'd', type: 'address' }],
name: 'tupleExample2',
type: 'tuple',
},
],
[
['0xabdef18710a18a18abdef18710a18a18abdef18710a18a18abdef18710a18a18', true],
[true, '0x77656c636f6d6520746f20657468657265756d2e']
]
)
'0xabdef18710a18a18abdef18710a18a18abdef18710a18a18abdef18710a18a180000000000000000000000000000000000000000000000000000000000000001000000000000000000000000000000000000000000000000000000000000000100000000000000000000000077656c636f6d6520746f20657468657265756d2e'encodeFunctionCall
caver.abi.encodeFunctionCall(jsonInterface, parameters)JSON 인터페이스 객체 및 주어진 매개변수를 사용하여 함수 호출을 인코딩합니다.
Parameters
Return Value
Examples
> caver.abi.encodeFunctionCall({
name: 'myMethod',
type: 'function',
inputs: [{
type: 'uint256',
name: 'myNumber'
},{
type: 'string',
name: 'mystring'
}]
}, ['2345675643', 'Hello!%'])
'0x24ee0097000000000000000000000000000000000000000000000000000000008bd02b7b0000000000000000000000000000000000000000000000000000000000000040000000000000000000000000000000000000000000000000000000000000000748656c6c6f212500000000000000000000000000000000000000000000000000'decodeFunctionCall
caver.abi.decodeFunctionCall(abi, functionCall)Decodes a function call from its abi object of a function or function abi string and returns parameters.
NOTE caver.abi.decodeFunctionCall is supported since caver-js v1.6.3.
Parameters
Return Value
Examples
> caver.abi.decodeFunctionCall({
name: 'myMethod',
type: 'function',
inputs: [{
type: 'uint256',
name: 'myNumber'
},{
type: 'string',
name: 'mystring'
}]
}, '0x24ee0097000000000000000000000000000000000000000000000000000000008bd02b7b0000000000000000000000000000000000000000000000000000000000000040000000000000000000000000000000000000000000000000000000000000000748656c6c6f212500000000000000000000000000000000000000000000000000')
Result {
'0': '2345675643',
'1': 'Hello!%',
__length__: 2,
myNumber: '2345675643',
mystring: 'Hello!%'
}decodeParameter
caver.abi.decodeParameter(type, hexstring)ABI 인코딩된 매개변수를 자바스크립트 타입으로 디코딩합니다.
Parameters
NOTE tuple type is supported since caver-js v1.6.0. For more details about tuple type, please refer to Solidity Docs.
Return Value
Examples
> caver.abi.decodeParameter('uint256', '0x0000000000000000000000000000000000000000000000000000000000000010')
'16'
> caver.abi.decodeParameter('string', '0x0000000000000000000000000000000000000000000000000000000000000020000000000000000000000000000000000000000000000000000000000000000848656c6c6f212521000000000000000000000000000000000000000000000000')
'Hello!%!'
> caver.abi.decodeParameter('tuple(bytes32,bool)', '0xabdef18710a18a18abdef18710a18a18abdef18710a18a18abdef18710a18a180000000000000000000000000000000000000000000000000000000000000001')
[ '0xabdef18710a18a18abdef18710a18a18abdef18710a18a18abdef18710a18a18', true ]
> caver.abi.decodeParameter(
{
components: [{ name: 'a', type: 'bytes32' }, { name: 'b', type: 'bool' }],
name: 'tupleExample',
type: 'tuple',
},
'0xabdef18710a18a18abdef18710a18a18abdef18710a18a18abdef18710a18a180000000000000000000000000000000000000000000000000000000000000001'
)
[
'0xabdef18710a18a18abdef18710a18a18abdef18710a18a18abdef18710a18a18',
true,
a: '0xabdef18710a18a18abdef18710a18a18abdef18710a18a18abdef18710a18a18',
b: true
]decodeParameters
caver.abi.decodeParameters(typesArray, hexstring)ABI 인코딩된 매개변수를 자바스크립트 타입으로 디코딩합니다.
Parameters
NOTE tuple type is supported since caver-js v1.6.0. For more details about tuple type, please refer to Solidity Docs.
Return Value
Examples
> caver.abi.decodeParameters(['string', 'uint256'], '0x000000000000000000000000000000000000000000000000000000000000004000000000000000000000000000000000000000000000000000000000000000ea000000000000000000000000000000000000000000000000000000000000000848656c6c6f212521000000000000000000000000000000000000000000000000')
Result { '0': 'Hello!%!', '1': '234' }
> caver.abi.decodeParameters([{
type: 'string',
name: 'mystring'
},{
type: 'uint256',
name: 'myNumber'
}], '0x000000000000000000000000000000000000000000000000000000000000004000000000000000000000000000000000000000000000000000000000000000ea000000000000000000000000000000000000000000000000000000000000000848656c6c6f212521000000000000000000000000000000000000000000000000')
Result {
'0': 'Hello!%!',
'1': '234',
mystring: 'Hello!%!',
myNumber: '234'
}
> caver.abi.decodeParameters(
['tuple(bytes32,bool)', 'tuple(bool,address)'],
'0xabdef18710a18a18abdef18710a18a18abdef18710a18a18abdef18710a18a180000000000000000000000000000000000000000000000000000000000000001000000000000000000000000000000000000000000000000000000000000000100000000000000000000000077656c636f6d6520746f20657468657265756d2e'
)
Result {
'0': [ '0xabdef18710a18a18abdef18710a18a18abdef18710a18a18abdef18710a18a18', true ],
'1': [ true, '0x77656c636f6d6520746F20657468657265756d2E' ],
}
> caver.abi.decodeParameters(
[
{
components: [{ name: 'a', type: 'bytes32' }, { name: 'b', type: 'bool' }],
name: 'tupleExample',
type: 'tuple',
},
{
components: [{ name: 'c', type: 'bool' }, { name: 'd', type: 'address' }],
name: 'tupleExample2',
type: 'tuple',
},
],
'0xabdef18710a18a18abdef18710a18a18abdef18710a18a18abdef18710a18a180000000000000000000000000000000000000000000000000000000000000001000000000000000000000000000000000000000000000000000000000000000100000000000000000000000077656c636f6d6520746f20657468657265756d2e'
)
Result {
'0': [
'0xabdef18710a18a18abdef18710a18a18abdef18710a18a18abdef18710a18a18',
true,
a: '0xabdef18710a18a18abdef18710a18a18abdef18710a18a18abdef18710a18a18',
b: true
],
'1': [
true,
'0x77656c636f6d6520746F20657468657265756d2E',
c: true,
d: '0x77656c636f6d6520746F20657468657265756d2E'
],
tupleExample: [
'0xabdef18710a18a18abdef18710a18a18abdef18710a18a18abdef18710a18a18',
true,
a: '0xabdef18710a18a18abdef18710a18a18abdef18710a18a18abdef18710a18a18',
b: true
],
tupleExample2: [
true,
'0x77656c636f6d6520746F20657468657265756d2E',
c: true,
d: '0x77656c636f6d6520746F20657468657265756d2E'
]
}decodeLog
caver.abi.decodeLog(inputs, hexstring, topics)ABI 인코딩된 로그 데이터 및 인덱싱된 토픽 데이터를 디코딩합니다.
Parameters
Return Value
Examples
> caver.abi.decodeLog([{
type: 'string',
name: 'mystring'
},{
type: 'uint256',
name: 'myNumber',
indexed: true
},{
type: 'uint8',
name: 'mySmallNumber',
indexed: true
}],
'0x0000000000000000000000000000000000000000000000000000000000000020000000000000000000000000000000000000000000000000000000000000000748656c6c6f252100000000000000000000000000000000000000000000000000',
['0x000000000000000000000000000000000000000000000000000000000000f310', '0x0000000000000000000000000000000000000000000000000000000000000010'])
Result {
'0': 'Hello%!',
'1': '62224',
'2': '16',
mystring: 'Hello%!',
myNumber: '62224',
mySmallNumber: '16'
}encodeContractDeploy
caver.abi.encodeContractDeploy(jsonInterface, hexstring [, params])Encodes smart contract bytecode with the arguments of the constructor.
Parameters
Return Value
Examples
// There is no argument for constructor
> caver.abi.encodeContractDeploy([
{"constant": true, "inputs": [], "name": "count", "outputs": [ { "name": "", "type": "uint256" } ], "payable": false, "stateMutability": "view", "type": "function" },
{ "constant": true, "inputs": [], "name": "getBlockNumber", "outputs": [ { "name": "", "type": "uint256" } ], "payable": false, "stateMutability": "view", "type": "function" },
{ "constant": false, "inputs": [ { "name": "_count", "type": "uint256" } ], "name": "setCount", "outputs": [], "payable": false, "stateMutability": "nonpayable", "type": "function" }
],'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')
'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'
// There is one argument for constructor(uint256)
> caver.abi.encodeContractDeploy([
{ "constant": true, "inputs": [], "name": "count", "outputs": [ { "name": "", "type": "uint256" } ], "payable": false, "stateMutability": "view", "type": "function" },
{ "constant": true, "inputs": [], "name": "getBlockNumber", "outputs": [ { "name": "", "type": "uint256" } ], "payable": false, "stateMutability": "view", "type": "function" },
{ "constant": false, "inputs": [ { "name": "_count", "type": "uint256" } ], "name": "setCount", "outputs": [], "payable": false, "stateMutability": "nonpayable", "type": "function" },
{ "inputs": [ { "name": "_a", "type": "uint256" } ], "payable": false, "stateMutability": "nonpayable", "type": "constructor" }
],'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', 1)
'0x60806040526000805534801561001457600080fd5b5060405160208061015d8339810180604052810190808051906020019092919050505050610116806100476000396000f3006080604052600436106053576000357c0100000000000000000000000000000000000000000000000000000000900463ffffffff16806306661abd14605857806342cbb15c146080578063d14e62b81460a8575b600080fd5b348015606357600080fd5b50606a60d2565b6040518082815260200191505060405180910390f35b348015608b57600080fd5b50609260d8565b6040518082815260200191505060405180910390f35b34801560b357600080fd5b5060d06004803603810190808035906020019092919050505060e0565b005b60005481565b600043905090565b80600081905550505600a165627a7a72305820ec774499bcdb89d9e570156a76249b33e99c766dfc6944e55aeeca316b41debf00290000000000000000000000000000000000000000000000000000000000000001'
// There are two arguments for constructor(uint256, uint256)
> caver.abi.encodeContractDeploy([
{ "constant": true, "inputs": [], "name": "count", "outputs": [ { "name": "", "type": "uint256" } ], "payable": false, "stateMutability": "view", "type": "function" },
{ "constant": true, "inputs": [], "name": "getBlockNumber", "outputs": [ { "name": "", "type": "uint256" } ], "payable": false, "stateMutability": "view", "type": "function" },
{ "constant": false, "inputs": [ { "name": "_count", "type": "uint256" } ], "name": "setCount", "outputs": [], "payable": false, "stateMutability": "nonpayable", "type": "function" },
{ "inputs": [ { "name": "_a", "type": "uint256" }, { "name": "_b", "type": "uint256" } ], "payable": false, "stateMutability": "nonpayable", "type": "constructor" }
],'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', 1, 2)
'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'
// There is one argument for constructor(string)
> caver.abi.encodeContractDeploy([
{ "constant": true, "inputs": [], "name": "count", "outputs": [ { "name": "", "type": "uint256" } ], "payable": false, "stateMutability": "view", "type": "function" },
{ "constant": true, "inputs": [], "name": "getBlockNumber", "outputs": [ { "name": "", "type": "uint256" } ], "payable": false, "stateMutability": "view", "type": "function" },
{ "constant": false, "inputs": [ { "name": "_count", "type": "uint256" } ], "name": "setCount", "outputs": [], "payable": false, "stateMutability": "nonpayable", "type": "function" },
{ "inputs": [ { "name": "_a", "type": "string" } ], "payable": false, "stateMutability": "nonpayable", "type": "constructor" }
],'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', 'stringParams')
'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'Last updated