Account

Reference of interfaces, presets, and utilities related to account contracts.

Core

ISRC6

use openzeppelin::account::interface::ISRC6;

Interface of the SRC6 Standard Account as defined in the SNIP-6.

0x2ceccef7f994940b3962a6c67e0ba4fcd37df7d131417c604f91e03caecc1cd

Functions

__execute__(calls: Array<Call>) → Array<Span<felt252>> external

Executes the list of calls as a transaction after validation.

Returns an array with each call’s output.

The Call struct is defined in corelib.

__validate__(calls: Array<Call>) → felt252 external

Validates a transaction before execution.

Returns the short string 'VALID' if valid, otherwise it reverts.

is_valid_signature(hash: felt252, signature: Array<felt252>) → felt252 external

Validates whether a signature is valid or not for the given message hash.

Returns the short string 'VALID' if valid, otherwise it reverts.

AccountComponent

use openzeppelin::account::AccountComponent;

Account component implementing ISRC6 for signatures over the Starknet curve.

Implementing SRC5Component is a requirement for this component to be implemented.

Embeddable functions

__execute__(self: @ContractState, calls: Array<Call>) → Array<Span<felt252>> external

__validate__(self: @ContractState, calls: Array<Call>) → felt252 external

is_valid_signature(self: @ContractState, hash: felt252, signature: Array<felt252>) → felt252 external

__validate_declare__(self: @ContractState, class_hash: felt252) → felt252 external

Validates a Declare transaction.

Returns the short string 'VALID' if valid, otherwise it reverts.

__validate_deploy__(self: @ContractState, class_hash: felt252, contract_address_salt: felt252, public_key: felt252) → felt252 external

Returns the short string 'VALID' if valid, otherwise it reverts.

get_public_key(self: @ContractState) → felt252 external

Returns the current public key of the account.

set_public_key(ref self: ContractState, new_public_key: felt252, signature: Span<felt252>) external

Sets a new public key for the account. Only accessible by the account calling itself through __execute__.

Requirements:

  • The caller must be the contract itself.

  • The signature must be valid for the new owner.

Emits both an OwnerRemoved and an OwnerAdded event.

The message to be signed is computed in Cairo as follows:

let message_hash = PoseidonTrait::new()
        .update_with('StarkNet Message')
        .update_with('accept_ownership')
        .update_with(get_contract_address())
        .update_with(current_owner)
        .finalize();

isValidSignature(self: @ContractState, hash: felt252, signature: Array<felt252>) → felt252 external

getPublicKey(self: @ContractState) → felt252 external

setPublicKey(ref self: ContractState, newPublicKey: felt252, signature: Span<felt252>) external

Internal functions

initializer(ref self: ComponentState, public_key: felt252) internal

Initializes the account with the given public key, and registers the ISRC6 interface ID.

Emits an OwnerAdded event.

assert_only_self(self: @ComponentState) internal

Validates that the caller is the account itself. Otherwise it reverts.

assert_valid_new_owner(self: @ComponentState, current_owner: felt252, new_owner: felt252, signature: Span<felt252>) internal

Validates that new_owner accepted the ownership of the contract through a signature.

Requirements:

  • signature must be valid for the new owner.

This function assumes that current_owner is the current owner of the contract, and does not validate this assumption.

validate_transaction(self: @ComponentState) → felt252 internal

Validates a transaction signature from the global context.

Returns the short string 'VALID' if valid, otherwise it reverts.

_set_public_key(ref self: ComponentState, new_public_key: felt252) internal

Set the public key without validating the caller.

Emits an OwnerAdded event.

The usage of this method outside the set_public_key function is discouraged.

_is_valid_signature(self: @ComponentState, hash: felt252, signature: Span<felt252>) → bool internal

Validates the provided signature for the hash, using the account’s current public key.

Events

OwnerAdded(new_owner_guid: felt252) event

Emitted when a public_key is added.

OwnerRemoved(removed_owner_guid: felt252) event

Emitted when a public_key is removed.

EthAccountComponent

use openzeppelin::account::eth_account::EthAccountComponent;

Account component implementing ISRC6 for signatures over the Secp256k1 curve.

Implementing SRC5Component is a requirement for this component to be implemented.
The EthPublicKey type is an alias for starknet::secp256k1::Secp256k1Point.

Embeddable functions

__execute__(self: @ContractState, calls: Array<Call>) → Array<Span<felt252>> external

__validate__(self: @ContractState, calls: Array<Call>) → felt252 external

is_valid_signature(self: @ContractState, hash: felt252, signature: Array<felt252>) → felt252 external

__validate_declare__(self: @ContractState, class_hash: felt252) → felt252 external

Validates a Declare transaction.

Returns the short string 'VALID' if valid, otherwise it reverts.

__validate_deploy__(self: @ContractState, class_hash: felt252, contract_address_salt: felt252, public_key: EthPublicKey) → felt252 external

Returns the short string 'VALID' if valid, otherwise it reverts.

get_public_key(self: @ContractState) → EthPublicKey external

Returns the current public key of the account.

set_public_key(ref self: ContractState, new_public_key: EthPublicKey, signature: Span<felt252>) external

Sets a new public key for the account. Only accessible by the account calling itself through __execute__.

Requirements:

  • The caller must be the contract itself.

  • The signature must be valid for the new owner.

Emits both an OwnerRemoved and an OwnerAdded event.

The message to be signed is computed in Cairo as follows:

let message_hash = PoseidonTrait::new()
        .update_with('StarkNet Message')
        .update_with('accept_ownership')
        .update_with(get_contract_address())
        .update_with(current_owner.get_coordinates().unwrap_syscall())
        .finalize();

isValidSignature(self: @ContractState, hash: felt252, signature: Array<felt252>) → felt252 external

getPublicKey(self: @ContractState) → EthPublicKey external

setPublicKey(ref self: ContractState, newPublicKey: EthPublicKey, signature: Span<felt252>) external

Internal functions

initializer(ref self: ComponentState, public_key: EthPublicKey) internal

Initializes the account with the given public key, and registers the ISRC6 interface ID.

Emits an OwnerAdded event.

assert_only_self(self: @ComponentState) internal

Validates that the caller is the account itself. Otherwise it reverts.

assert_valid_new_owner(self: @ComponentState, current_owner: EthPublicKey, new_owner: EthPublicKey, signature: Span<felt252>) internal

Validates that new_owner accepted the ownership of the contract through a signature.

Requirements:

  • The signature must be valid for the new_owner.

This function assumes that current_owner is the current owner of the contract, and does not validate this assumption.

validate_transaction(self: @ComponentState) → felt252 internal

Validates a transaction signature from the global context.

Returns the short string 'VALID' if valid, otherwise it reverts.

_set_public_key(ref self: ComponentState, new_public_key: EthPublicKey) internal

Set the public key without validating the caller.

Emits an OwnerAdded event.

The usage of this method outside the set_public_key function is discouraged.

_is_valid_signature(self: @ComponentState, hash: felt252, signature: Span<felt252>) → bool internal

Validates the provided signature for the hash, using the account’s current public key.

Events

The guid is computed as the hash of the public key, using the poseidon hash function.

OwnerAdded(new_owner_guid: felt252) event

Emitted when a public_key is added.

OwnerRemoved(removed_owner_guid: felt252) event

Emitted when a public_key is removed.

Presets

AccountUpgradeable

use openzeppelin::presets::AccountUpgradeable;

Upgradeable account contract leveraging AccountComponent.

0x00e2eb8f5672af4e6a4e8a8f1b44989685e668489b0a25437733756c5a34a1d6

Embedded Implementations
AccountComponent
External Functions

Constructor

constructor(ref self: ContractState, public_key: felt252) constructor

Sets the account public_key and registers the interfaces the contract supports.

External functions

upgrade(ref self: ContractState, new_class_hash: ClassHash) external

Upgrades the contract to a new implementation given by new_class_hash.

Requirements:

  • The caller is the account contract itself.

  • new_class_hash cannot be zero.

EthAccountUpgradeable

use openzeppelin::presets::EthAccountUpgradeable;

Upgradeable account contract leveraging EthAccountComponent.

The EthPublicKey type is an alias for starknet::secp256k1::Secp256k1Point.

0x0169e64bc8a60422da86e6cc821c498d2f8cba60888399ce4be86690aaa51e4a

Embedded Implementations
EthAccountComponent
External Functions

Constructor

constructor(ref self: ContractState, public_key: EthPublicKey) constructor

Sets the account public_key and registers the interfaces the contract supports.

External functions

upgrade(ref self: ContractState, new_class_hash: ClassHash) external

Upgrades the contract to a new implementation given by new_class_hash.

Requirements:

  • The caller is the account contract itself.

  • new_class_hash cannot be zero.