caver.wallet

caver.wallet is a package that manages Keyring instances in in-memory wallet. caver.wallet accepts all SingleKeyring, MultipleKeyring, and RoleBasedKeyring, and manages them by address.

Class

KeyringContainer

caver.wallet

KeyringContainer is a class that manages SingleKeyring, MultipleKeyring, and RoleBasedKeyring instances. When Caver is instantiated, it creates a KeyringContainer instance in the caver.wallet. You can store and manage keyring instances in the in-memory wallet through caver.wallet.

properties

Name

Type

Description

length

number

The number of keyrings in keyringContainer.

caver.wallet.generate

caver.wallet.generate(numberOfKeyrings [, entropy])

Generates instances of SingleKeyring in the keyringContainer with randomly generated private keys.

Parameters

Name

Type

Description

numberOfKeyrings

number

The number of SingleKeyring instances to create.

entropy

string

(optional) A random string to increase entropy.

Return Value

Type

Description

Array

An array containing the addresses of the generated.

Example

// generate without entropy
> caver.wallet.generate(3)
[
'0xb4b0c3781082cf818bfaf5adfc73fdf59d92c1cd',
'0x9957dfd92e4b70f91131c573293343bc5f21f215',
'0xed2fe179c18fa528da2392532998560bd1008511'
]
// generate with entropy
> caver.wallet.generate(3, caver.utils.randomHex(32))
[
'0xb4b0c3781082cf818bfaf5adfc73fdf59d92c1cd',
'0x9957dfd92e4b70f91131c573293343bc5f21f215',
'0xed2fe179c18fa528da2392532998560bd1008511'
]

caver.wallet.newKeyring

caver.wallet.newKeyring(address, key)

Creates a keyring instance with given parameters and adds it to the caver.wallet.

If key is a private key string, a SingleKeyring instance that uses a single private key is created. If key is an array containing private key strings, a MultipleKeyring instance that use multiple private keys is created. If key is a 2D array of which each element contains the private key(s) to be used for each role, a RoleBasedKeyring instance is created. The keyring created is added to caver.wallet.

Parameters

Name

Type

Description

address

string

The address string.

key

string | Array

The private key string, an array of private keys, or a 2D array of which each array element contains keys defined for each role.

Return Value

Type

Description

object

The keyring instance (SingleKeyring, MultipleKeyring or RoleBasedKeyring) added to caver.wallet is returned.

Example

// Create a instance of SingleKeyring and add to caver.wallet
> caver.wallet.newKeyring('0x{address in hex}', '0x{private key}')
SingleKeyring {
_address: '0x386a4bb40abbfaa59cecdc3ced202475895fd569',
_key: PrivateKey { _privateKey: '0x{private key}' }
}
// Create a instance of MultipleKeyring and add to caver.wallet
> caver.wallet.newKeyring('0x{address in hex}', ['0x{private key1}', '0x{private key2}'])
MultipleKeyring {
_address: '0x17e7531b40ad5d7b5fa7b4ec78df64ce1cb36d24',
_keys: [
PrivateKey { _privateKey: '0x{private key1}' },
PrivateKey { _privateKey: '0x{private key2}' }
]
}
// Create a instance of RoleBasedKeyring and add to caver.wallet
> const roleBasedKeys = [
['0x{private key1}', '0x{private key2}'],
['0x{private key3}', '0x{private key4}'],
['0x{private key5}', '0x{private key6}'],
]
> caver.wallet.newKeyring('0x{address in hex}', roleBasedKeys)
RoleBasedKeyring {
_address: '0xe7e9184c125020af5d34eab7848bab799a1dcba9',
_keys: [
[
PrivateKey { _privateKey: '0x{private key1}' },
PrivateKey { _privateKey: '0x{private key2}' }
],
[
PrivateKey { _privateKey: '0x{private key3}' },
PrivateKey { _privateKey: '0x{private key4}' }
],
[
PrivateKey { _privateKey: '0x{private key5}' },
PrivateKey { _privateKey: '0x{private key6}' }
]
]
}

caver.wallet.updateKeyring

caver.wallet.updateKeyring(keyring)

Updates the keyring inside the caver.wallet. When a new keyring instance (SingleKeyring, MultipleKeyring or RoleBasedKeyring) is passed as a parameter, the existing keyring stored in the caver.wallet that matches the address property of the given keyring instance is found and replaced with the given one. An error occurs when the matching keyring is not found.

Parameters

Name

Type

Description

keyring

object

The new keyring (SingleKeyring, MultipleKeyring or RoleBasedKeyring) to be stored in caver.wallet.

Return Value

Type

Description

object

The updated keyring (SingleKeyring, MultipleKeyring or RoleBasedKeyring) stored in caver.wallet.

Example

> caver.wallet.updateKeyring(newKeyring)
SingleKeyring {
_address: '0x386a4bb40abbfaa59cecdc3ced202475895fd569',
_key: PrivateKey { _privateKey: '0x{private key}' }
}

caver.wallet.getKeyring

caver.wallet.getKeyring(address)

Returns the keyring instance corresponding to the address in caver.wallet.

Parameters

Name

Type

Description

address

string

The address of keyring to query.

Return Value

Type

Description

object

The found keyring instance (SingleKeyring, MultipleKeyring or RoleBasedKeyring) stored in caver.wallet.

Example

> caver.wallet.getKeyring('0x386a4bb40abbfaa59cecdc3ced202475895fd569')
SingleKeyring {
_address: '0x386a4bb40abbfaa59cecdc3ced202475895fd569',
_key: PrivateKey { _privateKey: '0x{private key}' }
}

caver.wallet.add

caver.wallet.add(keyring)

Adds an instance of keyring to the caver.wallet. If the newly given keyring has the same address with one of the keyrings that already exist in caver.wallet, an error is returned. In this case, use updateKeyring to update the existing keyring in caver.wallet.

Parameters

Name

Type

Description

keyring

object

A keyring instance ((SingleKeyring, MultipleKeyring or RoleBasedKeyring)) to add to caver.wallet.

Return Value

Type

Description

object

The added keyring (SingleKeyring, MultipleKeyring or RoleBasedKeyring) in caver.wallet.

Example

> caver.wallet.add(keyring)
SingleKeyring {
_address: '0x386a4bb40abbfaa59cecdc3ced202475895fd569',
_key: PrivateKey { _privateKey: '0x{private key}' }
}

caver.wallet.remove

caver.wallet.remove(address)

Deletes the keyring from caver.wallet whose address matches the address of the given keyring.

Parameters

Name

Type

Description

address

string

An address of the keyring to be deleted in caver.wallet.

Return Value

Type

Description

boolean

true if keyring is removed from caver.wallet.

Example

> caver.wallet.remove('0x6a3edfad6d1126020d5369e9097db39281876c5d')
true

caver.wallet.signMessage

caver.wallet.signMessage(address, message, role [, index])

Signs the message with Klaytn-specific prefix using keyring stored in caver.wallet. This calculates a Klaytn-specific signature with:

sign(keccak256("\x19Klaytn Signed Message:\n" + len(message) + message)))

If the user has not provided the index parameter, caver.wallet.signMessage signs message using all the private keys used by the role. If the index parameter is given, caver.wallet.signMessage signs message using only one private key at the given index. The role used in caver-js can be found from caver.wallet.keyring.role.

Parameters

Name

Type

Description

address

string

An address of the keyring to be used.

message

string

The message to sign.

role

number

A number indicating the role of the key. You can use caver.wallet.keyring.role.

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.

Return Value

Type

Description

object

An object that includes the result of signing.

The returned object contains the following:

Name

Type

Description

messageHash

string

The hash of message with Klaytn-specific prefix.

signatures

Array

An array of SignatureData.

message

string

The message to sign.

Example

// Sign message with roleTransactionKey which uses two private keys
> caver.wallet.signMessage('0x386a4bb40abbfaa59cecdc3ced202475895fd569', 'message to sign', caver.wallet.keyring.role.roleTransactionKey)
{
messageHash: '0x9c4c1ae0aa1faf7e59eaf6fcf36a34542698197b379a9949b58c92925e74c069',
signatures: [
SignatureData { _v: '0x1c', _r: '0xb3239...', _s: '0x584d2...' },
SignatureData { _v: '0x1b', _r: '0x13c64...', _s: '0x60c61...' }
],
message: 'message to sign'
}
// Sign message with roleTransactionKey and index
> caver.wallet.signMessage('0x386a4bb40abbfaa59cecdc3ced202475895fd569', 'message to sign', caver.wallet.keyring.role.roleTransactionKey, 1)
{
messageHash: '0x9c4c1ae0aa1faf7e59eaf6fcf36a34542698197b379a9949b58c92925e74c069',
signatures: [
SignatureData { _v: '0x1b', _r: '0x13c64...', _s: '0x60c61...' }
],
message: 'message to sign'
}

caver.wallet.sign

caver.wallet.sign(address, transaction [, index] [, hasher])

Signs the transaction as a sender of the transaction and appends signatures in the transaction object using the keyring in caver.wallet.

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

Parameters

Name

Type

Description

address

string

An address of the keyring to be used.

transaction

object

An instance of Transaction.

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) A hash function to get the transaction hash. If hasher is given as a parameter, it calculates the transaction hash instead of the default method for calculating transaction hash implemented in caver-js. See Basic for details about the default method for transaction hash generation.

Return Value

Promise returning object: The signed transaction.

Type

Description

object

A signed transaction instance. The sign(s) is added to the transaction.signatures.

For more information about fields by transaction type, see caver.transaction.

Example

// This example uses the ValueTransfer transaction.
// Please refer to [caver.transaction] for how to use various transaction types.
> const transaction = caver.transaction.valueTransfer.create({
from: '0xe7e9184c125020af5d34eab7848bab799a1dcba9',
to: '0x3424b91026bdc5ec55df4548e6ebf0f28b60abd7',
value: 1,
gas: 30000,
})
> const customHasher = () => { ... }
// Sign a transaction with the address of RoleBasedKeyring which use two private keys for roleTransactionKey
> caver.wallet.sign('0xe7e9184c125020af5d34eab7848bab799a1dcba9', transaction).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 address of RoleBasedKeyring which use two private keys for roleTransactionKey and index
> caver.wallet.sign('0xe7e9184c125020af5d34eab7848bab799a1dcba9', transaction, 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 address of RoleBasedKeyring which use two private keys for roleTransactionKey and hasher
> caver.wallet.sign('0xe7e9184c125020af5d34eab7848bab799a1dcba9', transaction, 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 address of RoleBasedKeyring which use two private keys for roleTransactionKey, index and hasher
> caver.wallet.sign('0xe7e9184c125020af5d34eab7848bab799a1dcba9', transaction, 0, customHasher).then(console.log)
ValueTransfer {
_type: 'TxTypeValueTransfer',
_from: '0xe7e9184c125020af5d34eab7848bab799a1dcba9',
_gas: '0x7530',
_signatures: [
SignatureData { _v: '0x4e44', _r: '0x7a8b6...', _s: '0x17139...' }
],
_to: '0x3424b91026bdc5ec55df4548e6ebf0f28b60abd7',
_value: '0x1',
_chainId: '0x2710',
_gasPrice: '0x5d21dba00',
_nonce: '0x0'
}

caver.wallet.signAsFeePayer

caver.wallet.signAsFeePayer(address, transaction [, index] [, hasher])

Signs the transaction as fee payer of the transaction and appends feePayerSignatures in the transaction object using the keyring in caver.wallet.

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

If the transaction.feePayer is not defined, the address of keyring which is founded from caver.wallet is assigned.

Parameters

Name

Type

Description

address

string

An address of the keyring to be used.

transaction

object

An instance of FeeDelegatedTransaction.

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) A function to get the transaction hash. If hasher is defined as a parameter, this is used to get the transaction hash instead of a default implementation in caver-js.

Return Value

Promise returning object: The signed transaction.

Type

Description

object

A signed transaction instance. The signing result is appended to the transaction.feePayerSignatures.

For more information about fields by transaction type, see caver.transaction.

Example

// This example uses the FeeDelegatedValueTransfer transaction.
// Please refer to [caver.transaction] for how to use various transaction types.
> 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
> caver.wallet.signAsFeePayer('0xe7e9184c125020af5d34eab7848bab799a1dcba9', transaction).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, index
> caver.wallet.signAsFeePayer('0xe7e9184c125020af5d34eab7848bab799a1dcba9', transaction, 0).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...' }
],
_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
> caver.wallet.signAsFeePayer('0xe7e9184c125020af5d34eab7848bab799a1dcba9', transaction, 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
> caver.wallet.signAsFeePayer('0xe7e9184c125020af5d34eab7848bab799a1dcba9', transaction, 0, 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'
}