caver.transaction

caver.transaction is a package that provides functionality related to Transaction.

Class

Each transaction class is described in detail with the table below:

	Basic	Fee Delegation	Partial Fee Delegation
LegacyTransaction	LegacyTransaction	N/A	N/A
ValueTransfer	ValueTransfer	FeeDelegatedValueTransfer	FeeDelegatedValueTransferWithRatio
ValueTransferMemo	ValueTransferMemo	FeeDelegatedValueTransferMemo	FeeDelegatedValueTransferMemoWithRatio
SmartContractDeploy	SmartContractDeploy	FeeDelegatedSmartContractDeploy	FeeDelegatedSmartContractDeployWithRatio
SmartContractExecution	SmartContractExecution	FeeDelegatedSmartContractExecution	FeeDelegatedSmartContractExecutionWithRatio
AccountUpdate	AccountUpdate	FeeDelegatedAccountUpdate	FeeDelegatedAccountUpdateWithRatio
Cancel	Cancel	FeeDelegatedCancel	FeeDelegatedCancelWithRatio
ChainDataAnchoring	ChainDataAnchoring	FeeDelegatedChainDataAnchoring	FeeDelegatedChainDataAnchoringWithRatio
EthereumAccessList	EthereumAccessList	N/A	N/A
EthereumDynamicFee	EthereumDynamicFee	N/A	N/A

caver.transaction.decode

caver.transaction.decode(rlpEncoded)

Decodes RLP-encoded transaction string, a raw transaction, and returns a Transaction instance.

Parameters

Name	Type	Description
rlpEncoded	string	A RLP-encoded transaction string to decode.

Return Value

Type	Description
object	An instance of Transaction. For details of each transaction, refer to Transaction.

Example

> caver.transaction.decode('0x08f87...')

ValueTransfer {

_type: 'TxTypeValueTransfer',

_from: '0xa94f5374fce5edbc8e2a8697c15331677e6ebf0b',

_gas: '0xf4240',

_nonce: '0x4d2',

_gasPrice: '0x19',

_signatures: [

SignatureData { _v: '0x25', _r: '0xf3d0c...', _s: '0x6748a...' }

],

_to: '0x7b65b75d204abed71587c9e519a89277766ee1d0',

_value: '0xa'

}

caver.transaction.getTransactionByHash

caver.transaction.getTransactionByHash('0x{transaction hash}')

Queries a transaction from kaia and converts to a caver transaction instance.

NOTE caver.transaction.getTransactionByHash is supported since caver-js v1.6.3.

Parameters

Name	Type	Description
transactionHash	string	The transaction hash string to query from kaia.

Return Value

Promise returning object: An instance of Transaction. If it fails to receive a transaction object from kaia, an error occurs.

Type	Description
object	An instance of Transaction. For details of each transaction, refer to Transaction.

Example

> caver.transaction.getTransactionByHash('0x30575f5a76a4477502aa1e5e707e47f05b92c3450132529cf55764cc94f780b0').then(console.log)

LegacyTransaction {

_type: 'TxTypeLegacyTransaction',

_from: '0x9ce618d097ea54c00d1562cb060576ff64139f10',

_gas: '0x81b320',

_nonce: '0x1de',

_gasPrice: '0x5d21dba00',

_signatures: SignatureData {

_v: '0x07f5',

_r: '0x359a09ebd2842cfc9cad6fd93c299da8629292bb3a69410c73837f7ca15cfd51',

_s: '0x6f348cc656b90e79cfc1e748c3371fbd0128b83b787a110622f3aa5143a017f8'

},

_to: '0x',

_input: '0x60806...',

_value: '0x0'

}

caver.transaction.recoverPublicKeys

caver.transaction.recoverPublicKeys('0x{RLP-encoded transaction}')

Recovers the public key strings from signatures field of the given transaction.

NOTE caver.transaction.recoverPublicKeys is supported since caver-js v1.6.3.

Parameters

Name	Type	Description
rawTx	string	The RLP-encoded transaction string to recover public keys from signatures.

Return Value

Type	Description
Array	An array containing public keys recovered from signatures.

Example

> caver.transaction.recoverPublicKeys('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')

[

'0x8bb6aaeb2d96d024754d3b50babf116cece68977acbe8ba6a66f14d5217c60d96af020a0568661e7c72e753e80efe084a3aed9f9ac87bf44d09ce67aad3d4e01',

'0xc7751c794337a93e4db041fb5401c2c816cf0a099d8fd4b1f3f555aab5dfead2417521bb0c03d8637f350df15ef6a6cb3cdb806bd9d10bc71982dd03ff5d9ddd',

'0x3919091ba17c106dd034af508cfe00b963d173dffab2c7702890e25a96d107ca1bb4f148ee1984751e57d2435468558193ce84ab9a7731b842e9672e40dc0f22'

]

caver.transaction.recoverFeePayerPublicKeys

caver.transaction.recoverFeePayerPublicKeys('0x{RLP-encoded transaction}')

Recovers the public key strings from feePayerSignatures field of the given transaction.

NOTE caver.transaction.recoverFeePayerPublicKeys is supported since caver-js v1.6.3.

Parameters

Name	Type	Description
rawTx	string	The RLP-encoded transaction string to recover public keys from feePayerSignatures. To recover fee payer's public keys, the transaction should be a fee-delegated transaction with the feePayerSignatures field inside.

Return Value

Type	Description
Array	An array containing public keys recovered from feePayerSignatures.

Example

> caver.transaction.recoverFeePayerPublicKeys('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')

[

'0x2b557d80ddac3a0bbcc8a7861773ca7434c969e2721a574bb94a1e3aa5ceed3819f08a82b31682c038f9f691fb38ee4aaf7e016e2c973a1bd1e48a51f60a54ea',

'0x1a1cfe1e2ec4b15520c57c20c2460981a2f16003c8db11a0afc282abf929fa1c1868f60f91b330c423aa660913d86acc2a0b1b15e7ba1fe571e5928a19825a7e',

'0xdea23a89dbbde1a0c26466c49c1edd32785432389641797038c2b53815cb5c73d6cf5355986fd9a22a68bb57b831857fd1636362b383bd632966392714b60d72'

]

transaction.sign

transaction.sign(keyring [, index] [, hasher])

Signs the transaction as a transaction sender with the private key(s) in the keyring and appends signatures in the transaction object.

For Account Update transaction, use roleAccountUpdateKey, or otherwise, use roleTransactionKey in RoleBasedKeyring. If the user has not defined an index, transaction.sign signs the transaction using all the private keys used by the role. If index is defined, the transaction.sign signs the transaction using only one private key at the given index.

Parameters

Name	Type	Description
keyring	object \	string
index	number	(optional) The index of the private key you want to use. The index must be less than the length of the array of the private keys defined for each role. If an index is not defined, this method will use all the private keys.
hasher	Function	(optional) The hash function to get the hash of the transaction.

Return Value

Promise returning object: The signed transaction.

Type	Description
object	An instance of signed Transaction. The signature is appended to the transaction.signatures.

Example

// This example uses the ValueTransfer transaction.

> const transaction = caver.transaction.valueTransfer.create({

from: '0xe7e9184c125020af5d34eab7848bab799a1dcba9',

to: '0x3424b91026bdc5ec55df4548e6ebf0f28b60abd7',

value: 1,

gas: 30000,

})

> const customHasher = () => { ... }

// Sign a transaction with the roleBasedKeyring which use two private keys for roleTransactionKey

> transaction.sign(roleBasedKeyring).then(console.log)

ValueTransfer {

_type: 'TxTypeValueTransfer',

_from: '0xe7e9184c125020af5d34eab7848bab799a1dcba9',

_gas: '0x7530',

_signatures: [

SignatureData { _v: '0x4e43', _r: '0xd78a2...', _s: '0x379e9...' },

SignatureData { _v: '0x4e43', _r: '0x70a58...', _s: '0x2ab28...' }

],

_to: '0x3424b91026bdc5ec55df4548e6ebf0f28b60abd7',

_value: '0x1',

_chainId: '0x2710',

_gasPrice: '0x5d21dba00',

_nonce: '0x0'

}

// Sign a transaction with the roleBasedKeyring which use two private keys for roleTransactionKey and index

> transaction.sign(roleBasedKeyring, 1).then(console.log)

ValueTransfer {

_type: 'TxTypeValueTransfer',

_from: '0xe7e9184c125020af5d34eab7848bab799a1dcba9',

_gas: '0x7530',

_signatures: [

SignatureData { _v: '0x4e43', _r: '0x70a58...', _s: '0x2ab28...' }

],

_to: '0x3424b91026bdc5ec55df4548e6ebf0f28b60abd7',

_value: '0x1',

_chainId: '0x2710',

_gasPrice: '0x5d21dba00',

_nonce: '0x0'

}

// Sign a transaction with the roleBasedKeyring which use two private keys for roleTransactionKey and hasher

> transaction.sign(roleBasedKeyring, customHasher).then(console.log)

ValueTransfer {

_type: 'TxTypeValueTransfer',

_from: '0xe7e9184c125020af5d34eab7848bab799a1dcba9',

_gas: '0x7530',

_signatures: [

SignatureData { _v: '0x4e44', _r: '0x7a8b6...', _s: '0x17139...' },

SignatureData { _v: '0x4e43', _r: '0x7f978...', _s: '0x1a532...' }

],

_to: '0x3424b91026bdc5ec55df4548e6ebf0f28b60abd7',

_value: '0x1',

_chainId: '0x2710',

_gasPrice: '0x5d21dba00',

_nonce: '0x0'

}

// Sign a transaction with the roleBasedKeyring which use two private keys for roleTransactionKey, index and hasher

> transaction.sign(roleBasedKeyring, 1, customHasher).then(console.log)

ValueTransfer {

_type: 'TxTypeValueTransfer',

_from: '0xe7e9184c125020af5d34eab7848bab799a1dcba9',

_gas: '0x7530',

_signatures: [

SignatureData { _v: '0x4e43', _r: '0x7f978...', _s: '0x1a532...' }

],

_to: '0x3424b91026bdc5ec55df4548e6ebf0f28b60abd7',

_value: '0x1',

_chainId: '0x2710',

_gasPrice: '0x5d21dba00',

_nonce: '0x0'

}

transaction.signAsFeePayer

transaction.signAsFeePayer(keyring [, index] [, hasher])

Signs the transaction as a transaction fee payer and appends feePayerSignatures in the transaction object with the private key(s) in the keyring.

For signing a transaction as a fee payer, use roleFeePayerKey in keyring. If the user has not defined an index, transaction.signAsFeePayer signs the transaction using all the private keys used by the role. If index is defined, the transaction.signAsFeePayer signs the transaction using only one private key at the given index.

If the transaction.feePayer is not defined, the address of the given keyring is set to transaction.feePayer.

If the keyring to be used for signing the transaction was added to caver.wallet, you can use caver.wallet.signAsFeePayer.

NOTE This function works only for "fee-delegated" transactions or "fee-delegated with ratio" transactions.

Parameters

Name	Type	Description
keyring	object \	string
index	number	(optional) The index of the private key you want to use. The index must be less than the length of the array of the private keys defined for each role. If an index is not defined, this method will use all the private keys.
hasher	Function	(optional) The hash function to get the hash of the transaction.

Return Value

Promise returning object: The signed transaction.

Type	Description
object	An instance of signed Transaction. The signature is appended to the transaction.feePayerSignatures.

Example

// This example uses the FeeDelegatedValueTransfer transaction.

> const transaction = caver.transaction.feeDelegatedValueTransfer.create({

from: '0x6fddbcb99d31b8755c2b840a367f53eea4b4f45c',

to: '0x3424b91026bdc5ec55df4548e6ebf0f28b60abd7',

value: 1,

gas: 30000,

})

> const customHasher = () => { ... }

// Sign a transaction with the address of RoleBasedKeyring which use two private keys for roleFeePayerKey

> transaction.signAsFeePayer(roleBasedKeyring).then(console.log)

FeeDelegatedValueTransfer {

_type: 'TxTypeFeeDelegatedValueTransfer',

_from: '0x6fddbcb99d31b8755c2b840a367f53eea4b4f45c',

_gas: '0x7530',

_signatures: [ SignatureData { _v: '0x01', _r: '0x', _s: '0x' } ],

_feePayer: '0xe7e9184c125020af5d34eab7848bab799a1dcba9',

_feePayerSignatures: [

SignatureData { _v: '0x4e44', _r: '0x7010e...', _s: '0x65d6b...' },

SignatureData { _v: '0x4e43', _r: '0x96ef2...', _s: '0x77f34...' }

],

_to: '0x3424b91026bdc5ec55df4548e6ebf0f28b60abd7',

_value: '0x1',

_chainId: '0x2710',

_gasPrice: '0x5d21dba00',

_nonce: '0x0'

}

// Sign a transaction with the address of RoleBasedKeyring which use two private keys for roleFeePayerKey and index

> transaction.signAsFeePayer(roleBasedKeyring, 1).then(console.log)

FeeDelegatedValueTransfer {

_type: 'TxTypeFeeDelegatedValueTransfer',

_from: '0x6fddbcb99d31b8755c2b840a367f53eea4b4f45c',

_gas: '0x7530',

_signatures: [ SignatureData { _v: '0x01', _r: '0x', _s: '0x' } ],

_feePayer: '0xe7e9184c125020af5d34eab7848bab799a1dcba9',

_feePayerSignatures: [

SignatureData { _v: '0x4e43', _r: '0x96ef2...', _s: '0x77f34...' }

],

_to: '0x3424b91026bdc5ec55df4548e6ebf0f28b60abd7',

_value: '0x1',

_chainId: '0x2710',

_gasPrice: '0x5d21dba00',

_nonce: '0x0'

}

// Sign a transaction with the address of RoleBasedKeyring which use two private keys for roleFeePayerKey and hasher

> transaction.signAsFeePayer(roleBasedKeyring, customHasher).then(console.log)

FeeDelegatedValueTransfer {

_type: 'TxTypeFeeDelegatedValueTransfer',

_from: '0x6fddbcb99d31b8755c2b840a367f53eea4b4f45c',

_gas: '0x7530',

_signatures: [ SignatureData { _v: '0x01', _r: '0x', _s: '0x' } ],

_feePayer: '0xe7e9184c125020af5d34eab7848bab799a1dcba9',

_feePayerSignatures: [

SignatureData { _v: '0x4e43', _r: '0xe48bf...', _s: '0x1cf36...' },

SignatureData { _v: '0x4e43', _r: '0x82976...', _s: '0x3c5e0...' }

],

_to: '0x3424b91026bdc5ec55df4548e6ebf0f28b60abd7',

_value: '0x1',

_chainId: '0x2710',

_gasPrice: '0x5d21dba00',

_nonce: '0x0'

}

// Sign a transaction with the address of RoleBasedKeyring which use two private keys for roleFeePayerKey, index and hasher

> transaction.signAsFeePayer(roleBasedKeyring, 1, customHasher).then(console.log)

FeeDelegatedValueTransfer {

_type: 'TxTypeFeeDelegatedValueTransfer',

_from: '0x6fddbcb99d31b8755c2b840a367f53eea4b4f45c',

_gas: '0x7530',

_signatures: [ SignatureData { _v: '0x01', _r: '0x', _s: '0x' } ],

_feePayer: '0xe7e9184c125020af5d34eab7848bab799a1dcba9',

_feePayerSignatures: [

SignatureData { _v: '0x4e43', _r: '0x82976...', _s: '0x3c5e0...' }

],

_to: '0x3424b91026bdc5ec55df4548e6ebf0f28b60abd7',

_value: '0x1',

_chainId: '0x2710',

_gasPrice: '0x5d21dba00',

_nonce: '0x0'

}

transaction.appendSignatures

transaction.appendSignatures(signatures)

Appends signatures to the transaction.

Parameters

Name	Type	Description
signatures	object \	Array

Example

> transaction.appendSignatures([ '0x4e44', '0x7010e...', '0x65d6b...' ])

transaction.appendFeePayerSignatures

transaction.appendFeePayerSignatures(signatures)

Appends feePayerSignatures to the transaction.

NOTE This function works only for "fee-delegated" transactions or "fee-delegated with ratio" transactions.

Parameters

Name	Type	Description
feePayerSignatures	object \	Array

Example

> transaction.appendFeePayerSignatures([ '0x4e44', '0x7010e...', '0x65d6b...' ])

transaction.combineSignedRawTransactions

transaction.combineSignedRawTransactions(rlpEncodedTxs)

Collects signs in each RLP-encoded transaction string in the given array, combines them with the transaction instance, and returns a RLP-encoded transaction string which includes all signs. Note that the transaction instance doesn't necessarily be signed in advance. If the transaction is either a type of "fee-delegated" or "fee-delegated with ratio", feePayerSignatures is also merged and included in the output RLP-encoded transaction string.

Parameters

Name	Type	Description
rlpEncodedTxs	Array	An array of signed RLP-encoded transaction strings.

Return Value

Type	Description
string	A RLP-encoded transaction string which includes all signatures (and feePayerSignatures if transaction is a type of either "fee-delgated" or "fee-delegated with ratio").

Example

> transaction.combineSignedRawTransactions(['0x09f88...'])

'0x09f885018505d21dba00830f4240947b65b75d204abed71587c9e519a89277766ee1d00a9404bb86a1b16113ebe8f57071f839b002cbcbf7d0f847f845820feaa068e56f3da7fbe7a86543eb4b244ddbcb13b2d1cb9adb3ee8a4c8b046821bc492a068c29c057055f68a7860b54184bba7967bcf42b6aae12beaf9f30933e6e730c280c4c3018080'

transaction.getRLPEncoding

transaction.getRLPEncoding()

Returns a RLP-encoded transaction string.

For information on how to make the RLP-encoded string for each transaction type, see Kaia Design - Transactions.

Return Value

Type	Description
string	A RLP-encoded transaction string.

Example

> transaction.getRLPEncoding()

'0x09f885018505d21dba00830f4240947b65b75d204abed71587c9e519a89277766ee1d00a9404bb86a1b16113ebe8f57071f839b002cbcbf7d0f847f845820feaa068e56f3da7fbe7a86543eb4b244ddbcb13b2d1cb9adb3ee8a4c8b046821bc492a068c29c057055f68a7860b54184bba7967bcf42b6aae12beaf9f30933e6e730c280c4c3018080'

transaction.getRawTransaction

transaction.getRawTransaction()

Returns a rawTransaction string (a RLP-encoded transaction string). This function is same with transaction.getRLPEncoding.

Return Value

Type	Description
string	A RLP-encoded transaction string.

Example

> transaction.getRawTransaction()

'0x09f885018505d21dba00830f4240947b65b75d204abed71587c9e519a89277766ee1d00a9404bb86a1b16113ebe8f57071f839b002cbcbf7d0f847f845820feaa068e56f3da7fbe7a86543eb4b244ddbcb13b2d1cb9adb3ee8a4c8b046821bc492a068c29c057055f68a7860b54184bba7967bcf42b6aae12beaf9f30933e6e730c280c4c3018080'

transaction.getTransactionHash

transaction.getTransactionHash()

Returns a transactionHash.

For information on how to make the transaction hash for each transaction type, see Kaia Design - Transactions.

Return Value

Type	Description
string	A transactionHash.

Example

> transaction.getTransactionHash()

'0x8ac53afbba014201b02398545653683fe0536c49707fe302c59423012c0e8697'

transaction.getSenderTxHash

transaction.getSenderTxHash()

Returns a senderTxHash of transaction.

The senderTxHash is a hash of the transaction except for the fee payer's address and signature, so transactionHash and senderTxHash are the same for basic transactions.

For information on how to make the senderTxHash for each transaction type, see Kaia Design - Transactions.

Return Value

Type	Description
string	A senderTxHash.

Example

> transaction.getSenderTxHash()

'0xb61cc1ddadb6f2ec34c9f9e6a7b6cf0a606422654d649d998587c77daa3c31fe'

transaction.getRLPEncodingForSignature

transaction.getRLPEncodingForSignature()

Returns a RLP-encoded transaction string for making the signature of the transaction sender. Note that the returned RLP-encoded transaction string is not added with the signature and rather is used to generate this signature.

For information on how to make a RLP-encoded transaction string to generate the transaction sender's signature for each transaction type, see Kaia Design - Transactions.

Return Value

Type	Description
string	A RLP-encoded transaction string without any signature attached.

Example

> transaction.getRLPEncodingForSignature()

'0xf83fb838f709018505d21dba00830f4240947b65b75d204abed71587c9e519a89277766ee1d00a9404bb86a1b16113ebe8f57071f839b002cbcbf7d08207e38080'

transaction.getRLPEncodingForFeePayerSignature

transaction.getRLPEncodingForFeePayerSignature()

Returns a RLP-encoded transaction string for making the signature of the fee payer. Note that the returned RLP-encoded transaction string is not added with the signature and rather is used to generate this signature.

For information on how to make a RLP-encoded transaction string to generate the fee payer's signature for each transaction type, see Kaia Design - Transactions.

NOTE This function works only for "fee-delegated" transactions or "fee-delegated with ratio" transactions.

Return Value

Type	Description
string	A RLP-encoded transaction string without any signature attached.

Example

> transaction.getRLPEncodingForFeePayerSignature()

'0xf840b838f709018505d21dba00830f4240947b65b75d204abed71587c9e519a89277766ee1d00a9404bb86a1b16113ebe8f57071f839b002cbcbf7d0808207e38080'

transaction.fillTransaction

transaction.fillTransaction()

Fills in the optional variables in transaction.

If the gasPrice, nonce, or chainId of the transaction are not defined, this method asks the default values for these optional variables and preset them by sending JSON RPC call to the connected kaia Node.

Use caver.rpc.klay.getGasPrice to get gasPrice, caver.rpc.klay.getTransactionCount to get nonce and caver.rpc.klay.getChainId call to get chainId.

Return Value

Promise returning void

Example

> transaction.fillTransaction()

transaction.recoverPublicKeys

transaction.recoverPublicKeys()

Recovers the public key strings from signatures field.

NOTE transaction.recoverPublicKeys is supported since caver-js v1.6.3.

Return Value

Type	Description
Array	An array containing public keys recovered from signatures.

Example

> transaction.recoverPublicKeys()

[

'0x8bb6aaeb2d96d024754d3b50babf116cece68977acbe8ba6a66f14d5217c60d96af020a0568661e7c72e753e80efe084a3aed9f9ac87bf44d09ce67aad3d4e01',

'0xc7751c794337a93e4db041fb5401c2c816cf0a099d8fd4b1f3f555aab5dfead2417521bb0c03d8637f350df15ef6a6cb3cdb806bd9d10bc71982dd03ff5d9ddd',

'0x3919091ba17c106dd034af508cfe00b963d173dffab2c7702890e25a96d107ca1bb4f148ee1984751e57d2435468558193ce84ab9a7731b842e9672e40dc0f22'

]

transaction.recoverFeePayerPublicKeys

transaction.recoverFeePayerPublicKeys()

Recovers the public key strings from feePayerSignatures field.

NOTE transaction.recoverFeePayerPublicKeys is supported since caver-js v1.6.3.

Return Value

Type	Description
Array	An array containing public keys recovered from feePayerSignatures.

Example

> transaction.recoverFeePayerPublicKeys()

[

'0x2b557d80ddac3a0bbcc8a7861773ca7434c969e2721a574bb94a1e3aa5ceed3819f08a82b31682c038f9f691fb38ee4aaf7e016e2c973a1bd1e48a51f60a54ea',

'0x1a1cfe1e2ec4b15520c57c20c2460981a2f16003c8db11a0afc282abf929fa1c1868f60f91b330c423aa660913d86acc2a0b1b15e7ba1fe571e5928a19825a7e',

'0xdea23a89dbbde1a0c26466c49c1edd32785432389641797038c2b53815cb5c73d6cf5355986fd9a22a68bb57b831857fd1636362b383bd632966392714b60d72'

]

transaction.suggestGasPrice

transaction.suggestGasPrice()

Returns suggested gas price. This function is used to set gasPrice field in the fillTransaction.

Before the Magma hard fork, suggestGasPrice returns the unit price of the network. After the Magma hard fork, suggestGasPrice returns baseFee * 2 which is recommended to use as gasPrice.

NOTE transaction.suggestGasPrice is supported since caver-js v1.9.0.

Return Value

Promise returning string: The suggested gas price in hexadecimal string.

Type	Description
string	The suggested gas price.

Example

> tx.suggestGasPrice().then(console.log)

0xba43b7400