caver.validator
The caver.validator package provides validation functions that should be used when implementing applications on Klaytn.
NOTE caver.validator is supported since caver-js v1.6.3.

validateSignedMessage

caver.validator.validateSignedMessage(message, signatures, address [, isHashed])
Validates a signed message by comparing the public key recovered from the signature with the account key of the Klaytn account.
Parameters
이름
타입
설명
메시지
string
The raw message string. If this message is hashed with the Klaytn-specific prefix, the third parameter should be passed as true.
서명
object | Array
An object in the format of { v, r, s }, an instance of SignatureData, or an array of SignatureData. '[ v, r, s ]' or '[[ v, r, s ]]' array can also be passed as a parameter, and in this case, it is internally converted to SignatureData type.
주소
string
The address of the account that signed the message.
isHashed
boolean
(optional, default: false) Whether the message passed as a parameter is hashed with the prefix "\x19Klaytn Signed Message:\n" + message.length + message.
리턴값
Promise returning boolean: The promise will be resolved with a boolean value of whether the signature on the message is valid or not.
예제
const address = '0xa84a1ce657e9d5b383cece6f4ba365e23fa234dd'
const message = 'Some Message'
const signature = [
'0x1b',
'0x8213e560e7bbe1f2e28fd69cbbb41c9108b84c98cd7c2c88d3c8e3549fd6ab10',
'0x3ca40c9e20c1525348d734a6724db152b9244bff6e0ff0c2b811d61d8f874f00',
]
> caver.validator.validateSignedMessage(message, signature, address).then(console.log)
const address = '0xa84a1ce657e9d5b383cece6f4ba365e23fa234dd'
const hashedMessage = '0xa4b1069c1000981f4fdca0d62302dfff77c2d0bc17f283d961e2dc5961105b18'
const signature = [
'0x1b',
'0x8213e560e7bbe1f2e28fd69cbbb41c9108b84c98cd7c2c88d3c8e3549fd6ab10',
'0x3ca40c9e20c1525348d734a6724db152b9244bff6e0ff0c2b811d61d8f874f00',
]
> caver.validator.validateSignedMessage(hashedMessage, signature, address, true).then(console.log)

validateTransaction

caver.validator.validateTransaction(tx)
Validates a transaction. This function compares the public keys from the account key of the Klaytn account with the public keys recovered from signatures. If the transaction is fee-delegated with the feePayerSignatures variable inside, this function compares the public keys recovered from feePayerSignatures with the public keys of the fee payer.
Parameters
이름
타입
설명
tx
객체
An instance of Transaction to validate.
리턴값
Promise returning boolean: The promise will be resolved with a boolean value of whether the transacion is valid or not.
예제
// Basic transaction will be validated with `signatures`.
const tx = caver.transaction.valueTransfer.create({...})
> caver.validator.validateTransaction(tx).then(console.log)
// Fee-delegation transaction will be validated with `signatures` and `feePayerSignatures`.
const tx = caver.transaction.feeDelegatedValueTransfer.create({...})
> caver.validator.validateTransaction(tx).then(console.log)

validateSender

caver.validator.validateSender(tx)
Validates the sender of the transaction. This function compares the public keys of the account key of the Klaytn account with the public keys recovered from signatures.
Parameters
이름
타입
설명
tx
객체
An instance of Transaction to validate.
리턴값
Promise returning boolean: The promise will be resolved with a boolean value of whether the transaction is valid or not.
예제
const tx = caver.transaction.valueTransfer.create({...})
> caver.validator.validateSender(tx).then(console.log)

validateFeePayer

caver.validator.validateFeePayer(tx)
Validates a fee payer in the transaction. This function compares the public keys of the account key of the fee payer with the public keys recovered from feePayerSignatures.
Parameters
이름
타입
설명
tx
객체
An instance of Transaction to validate.
리턴값
Promise returning boolean: The promise will be resolved with a boolean value of whether the transaction is valid or not.
예제
const tx = caver.transaction.feeDelegatedValueTransfer.create({...})
> caver.validator.validateFeePayer(tx).then(console.log)
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On this page
validateSignedMessage
validateTransaction
validateSender
validateFeePayer