Skip to main content
Version: 11.x

Class: Contract

Defined in: src/contract/default.ts:117

Interface for interacting with Starknet smart contracts

Provides methods for calling contract functions, estimating fees, and managing contract state. Supports both read-only calls and state-changing invocations.

Remarks​

The interface provides multiple ways to interact with contracts:

  • Direct method calls for convenience
  • Generic call/invoke methods for flexibility
  • Fee estimation and transaction population
  • Event parsing and contract validation

Implements​

Indexable​

[key: string]: any

Constructors​

Constructor​

new Contract(options): Contract

Defined in: src/contract/default.ts:213

Parameters​

options​

ContractOptions

abi: Abi of the contract object (required)

  • address: address to connect to (required)
  • providerOrAccount?: Provider or Account to attach to (optional, creates default RpcProvider on first use with auto node detection)
  • parseRequest?: compile and validate arguments (optional, default true)
  • parseResponse?: Parse elements of the response array and structuring them into response object (optional, default true)
  • parser?: Abi parser (optional, default createAbiParser(options.abi))

Returns​

Contract

Properties​

abi​

abi: Abi

Defined in: src/contract/default.ts:118

Contract ABI (Application Binary Interface)

Implementation of​

ContractInterface.abi

address​

address: string

Defined in: src/contract/default.ts:120

Contract address on Starknet

Implementation of​

ContractInterface.address

providerOrAccount?​

optional providerOrAccount?: ProviderOrAccount

Defined in: src/contract/default.ts:122

Provider for read operations or Account for write operations Optional - a default RpcProvider will be created on first async operation if not provided

Implementation of​

ContractInterface.providerOrAccount

classHash?​

optional classHash?: string

Defined in: src/contract/default.ts:124

Optional contract class hash for optimization

Implementation of​

ContractInterface.classHash

parseRequest​

parseRequest: boolean

Defined in: src/contract/default.ts:126

parseResponse​

parseResponse: boolean

Defined in: src/contract/default.ts:128

functions​

readonly functions: object

Defined in: src/contract/default.ts:136

Contract methods that return promises (async operations)

Index Signature​

[name: string]: AsyncContractFunction

Implementation of​

ContractInterface.functions

callStatic​

readonly callStatic: object

Defined in: src/contract/default.ts:138

Contract methods for read-only calls (state queries)

Index Signature​

[name: string]: AsyncContractFunction

Implementation of​

ContractInterface.callStatic

populateTransaction​

readonly populateTransaction: object

Defined in: src/contract/default.ts:140

Contract methods that return populated transactions for batching

Index Signature​

[name: string]: ContractFunction

Implementation of​

ContractInterface.populateTransaction

estimateFee​

readonly estimateFee: object

Defined in: src/contract/default.ts:142

Contract methods for fee estimation

Index Signature​

[name: string]: ContractFunction

Implementation of​

ContractInterface.estimateFee

callData​

callData: CallData

Defined in: src/contract/default.ts:159

The CallData this contract serializes and reads through.

Reachable because it is the end of a chain whose every other link is: building a Cairo type over one of this contract's own types — a struct, a custom enum — takes the strategies the abi parser assembled, and this is the only way to them. Rebuilding a CallData from abi is not the same thing: a strategy given to this contract would be lost on the way.

const strategies = myContract.callData.parser.parsingStrategies;
const points = new CairoArray(list, 'core::array::Array::<my::Point>', strategies);

withOptionsProps?​

optional withOptionsProps?: WithOptions

Defined in: src/contract/default.ts:161

Methods​

factory()​

static factory(params, details?): Promise<Contract>

Defined in: src/contract/default.ts:566

Factory method to declare and/or deploy a contract creating a new Contract instance

It handles the entire lifecycle: compiles constructor calldata, optionally declares the contract class, deploys an instance, and returns a ready-to-use Contract object.

When classHash is provided, it will only deploy the contract without declaring. When contract is provided without classHash, it will declare and deploy.

Parameters​

params​

FactoryParams

Factory parameters containing Contract Class details and deployment options

details?​

UniversalDetails = {}

Returns​

Promise<Contract>

Promise that resolves to a deployed Contract instance with address and transaction hash

Throws​

Error if deployment fails or contract_address is not returned

Example​

// Declare and deploy an ERC20 contract
const contract = await Contract.factory({
  contract: erc20CompiledContract,
  account: myAccount,
  casm: erc20Casm,
  constructorCalldata: {
    name: 'MyToken',
    symbol: 'MTK',
    decimals: 18,
    initial_supply: { low: 1000000, high: 0 },
    recipient: myAccount.address
  }
});

// Deploy-only mode with existing classHash (ABI will be fetched from network)
const contract2 = await Contract.factory({
  classHash: '0x1234...',
  account: myAccount,
  constructorCalldata: {
    name: 'AnotherToken',
    symbol: 'ATK',
    decimals: 18,
    initial_supply: { low: 2000000, high: 0 },
    recipient: myAccount.address
  }
});

// Deploy-only mode with provided ABI (faster, no network call)
const contract3 = await Contract.factory({
  classHash: '0x1234...',
  abi: erc20Abi,
  account: myAccount,
  constructorCalldata: {
    name: 'ThirdToken',
    symbol: 'TTK',
    decimals: 18,
    initial_supply: { low: 3000000, high: 0 },
    recipient: myAccount.address
  }
});

console.log('Contract deployed at:', contract.address);
```\

***

### withOptions()

> **withOptions**(`options`): `this`

Defined in: [src/contract/default.ts:278](https://github.com/starknet-io/starknet.js/blob/develop/src/contract/default.ts#L278)

Set execution options for subsequent contract interactions

#### Parameters

##### options

[`WithOptions`](../type-aliases/WithOptions.md)

Options to override for contract interactions

#### Returns

`this`

This contract instance with the specified options applied

#### Example

```typescript
contract.withOptions({
  blockIdentifier: 'latest',
  parseResponse: false
});
// Now all subsequent calls use these options

Implementation of​

ContractInterface.withOptions

attach()​

attach(address, abi?): void

Defined in: src/contract/default.ts:283

Attach the contract to a different address with optional new ABI

Parameters​

address​

string

New contract address to interact with

abi?​

Abi

Optional new ABI to use (defaults to current ABI)

Returns​

void

Example​

contract.attach('0x123...', newAbi);
// Now contract.address === '0x123...' and uses newAbi

Implementation of​

ContractInterface.attach

isDeployed()​

isDeployed(): Promise<Contract>

Defined in: src/contract/default.ts:295

Verify that a contract is deployed at the current address

Returns​

Promise<Contract>

Promise resolving to this contract instance if deployed

Throws​

If no contract is found at the address

Example​

try {
  await contract.isDeployed();
  console.log('Contract is deployed');
} catch (error) {
  console.log('Contract not found at address');
}

Implementation of​

ContractInterface.isDeployed

call()​

call(method, args?, options?): Promise<CallResult>

Defined in: src/contract/default.ts:307

Call a read-only contract method (view function)

Parameters​

method​

string

Name of the contract method to call

args?​

ArgsOrCalldata = []

Method arguments as array or calldata

options?​

CallOptions = {}

Call options including block identifier and parsing settings

Returns​

Promise<CallResult>

Parsed result from the contract method

Example​

const balance = await contract.call('balanceOf', [userAddress]);
const name = await contract.call('name', [], { blockIdentifier: 'latest' });

Implementation of​

ContractInterface.call

invoke()​

Call Signature​

invoke(method, args, options): Promise<SuccessfulTransactionReceiptResponseHelper>

Defined in: src/contract/default.ts:349

Invoke a state-changing contract method (external function)

Parameters​
method​

string

Name of the contract method to invoke

args​

ArgsOrCalldata

Method arguments as array or calldata

options​

Pick<CommonContractOptions, "parseRequest"> & object & Partial<UniversalDetails> & object

Execution options including transaction details

Returns​

Promise<SuccessfulTransactionReceiptResponseHelper>

Transaction response with hash

Example​
const tx = await contract.invoke('transfer', [recipient, amount]);
const receipt = await provider.waitForTransaction(tx.transaction_hash);
Implementation of​

ContractInterface.invoke

Call Signature​

invoke(method, args, options): Promise<{ transaction_hash: string; }>

Defined in: src/contract/default.ts:354

Parameters​
method​

string

args​

ArgsOrCalldata

options​

Pick<CommonContractOptions, "parseRequest"> & object & Partial<UniversalDetails> & object

Returns​

Promise<{ transaction_hash: string; }>

Implementation of​

ContractInterface.invoke

Call Signature​

invoke(method, args?, options?): Promise<{ transaction_hash: string; }>

Defined in: src/contract/default.ts:359

Parameters​
method​

string

args?​

ArgsOrCalldata

options?​

ExecuteOptions

Returns​

Promise<{ transaction_hash: string; }>

Implementation of​

ContractInterface.invoke

estimate()​

estimate(method, args?, estimateDetails?): Promise<EstimateFeeResponseOverhead | PaymasterFeeEstimate>

Defined in: src/contract/default.ts:435

Estimate fee for invoking a contract method

Parameters​

method​

string

Name of the contract method to estimate

args?​

ArgsOrCalldata = []

Method arguments as array or calldata

estimateDetails?​

ExecuteOptions = {}

Returns​

Promise<EstimateFeeResponseOverhead | PaymasterFeeEstimate>

Fee estimation details

Example​

const feeEstimate = await contract.estimate('transfer', [recipient, amount]);
console.log('Estimated fee:', feeEstimate.overall_fee);

Implementation of​

ContractInterface.estimate

compile()​

compile(method, args?): Calldata

Defined in: src/contract/default.ts:466

Compile the calldata for a contract method, using the contract abi.

Unlike populate, this returns only the compiled Calldata array, without wrapping it in an Invocation object (no contractAddress nor entrypoint). It is the contract-bound equivalent of myCallData.compile(method, args).

If args is already a compiled Calldata, it is returned as-is without recompilation.

Parameters​

method​

string

Name of the contract method, as defined in the abi

args?​

RawArgs = []

Method arguments as array (in abi order) or object (free order), or an already compiled calldata

Returns​

Calldata

The compiled calldata

Example​

// 'amount' is a u256: the abi splits it into 2 felts automatically
const calldata = contract.compile('transfer', { recipient: '0x123', amount: 100n });
// calldata = ['0x123', '100', '0']

Implementation of​

ContractInterface.compile

populate()​

populate(method, args?): Call

Defined in: src/contract/default.ts:470

Populate transaction data for a contract method call

Parameters​

method​

string

Name of the contract method

args?​

RawArgs = []

Method arguments as array or calldata

Returns​

Call

Invocation object for batching or inspection

Example​

const invocation = contract.populate('transfer', [recipient, amount]);
// Use in account.execute([invocation1, invocation2, ...])

Implementation of​

ContractInterface.populate

parseEvents()​

parseEvents(receipt): ParsedEvents

Defined in: src/contract/default.ts:478

Parse events from a transaction receipt using the contract's ABI

Parameters​

receipt​

GetTransactionReceiptResponse

Transaction receipt from waitForTransaction

Returns​

ParsedEvents

Array of parsed events with decoded data

Example​

const receipt = await provider.waitForTransaction(txHash);
const events = contract.parseEvents(receipt);
events.forEach(event => {
  console.log('Event:', event.name, event.data);
});

Implementation of​

ContractInterface.parseEvents

isCairo1()​

isCairo1(): boolean

Defined in: src/contract/default.ts:495

Check if the contract is implemented in Cairo 1

Returns​

boolean

True if the contract uses Cairo 1, false for Cairo 0 (legacy)

Example​

if (contract.isCairo1()) {
  console.log('Using Cairo 1 features');
}

Implementation of​

ContractInterface.isCairo1

getVersion()​

getVersion(): Promise<ContractVersion>

Defined in: src/contract/default.ts:499

Get the Cairo and compiler version of the contract

Returns​

Promise<ContractVersion>

Object containing cairo version and compiler version

Example​

const version = await contract.getVersion();
console.log(`Cairo ${version.cairo}, Compiler ${version.compiler}`);

Implementation of​

ContractInterface.getVersion

typedv2()​

typedv2<TAbi>(tAbi): TypedContractV2<TAbi>

Defined in: src/contract/default.ts:504

Create a typed contract instance with full TypeScript support

Type Parameters​

TAbi​

TAbi extends Abi

Parameters​

tAbi​

TAbi

The typed ABI interface for compile-time type checking

Returns​

TypedContractV2<TAbi>

Typed contract instance with IntelliSense support

Example​

const typedContract = contract.typedv2(erc20Abi);
// Now typedContract.transfer() has full type safety

Implementation of​

ContractInterface.typedv2