Chain information

Mainnet

0.13.5

1.7.0

2.0.0 - 2.11.0

Sepolia

0.13.5

1.7.0

2.0.0 - 2.11.0

Block time

The maximum amount of time within which a pending block is closed, if no other limit is met.

30 seconds

30 seconds

Block limit (Cairo steps)

The maximum number of Cairo steps that can be completed within each block to ensure block production times remain consistent and predictable.

40,000,000

40,000,000

Block limit (gas)

Certain Starknet operations, such as sending messages between L1 and L2, consume Ethereum gas. The current L1 state update mechanism involves an Ethereum transaction for each Starknet block.

The gas limit for Starknet blocks is therefore inherited from the gas limit for Ethereum blocks.

5,000,000

5,000,000

Max transaction size (Cairo steps)

The maximum number of computational steps, measured in Cairo steps, that a transaction can contain when processed on the Starknet network. This limit is important for ensuring the efficient execution of transactions and preventing potential congestion.

10,000,000

10,000,000

Max state updates per transaction

The maximum number of storage updates that a single transaction can generate. This limit helps maintain network stability and predictable performance.

2,000

2,000

Max number of events per transaction

The maximum number of events that a transaction can emit during its execution.

1,000

1,000

Max number of data felts per event

The maximum number of felts that an event can contain in its data array.

300

300

Max number of key felts per event

The maximum number of felts that an event can contain in its keys array.

50

50

Max Cairo steps for validate

The maximum number of computational steps, measured in Cairo steps, for a validate function.

1,000,000

1,000,000

Max contract bytecode size (felts)

The maximum size of the bytecode or program that a smart contract can have on Starknet.

Bytecode is the low-level code that comprises smart contracts. Limiting this size helps manage the complexity of contracts and the overall efficiency of the network.

81,920

81,920

Max contract class size

The maximum size for a contract class within Starknet.

Contract classes are a fundamental building block for smart contracts, and limiting their size can have implications for the network’s scalability and security.

4,089,446 bytes

4,089,446 bytes

IP address limits

In order to reduce network spam, Starknet limits the amount of contract reads and writes that a single IP address can make.

200 per min per IP address

200 per min per IP address

Signature length (felts)

The maximum length of a signature

4,000

4,000

Calldata length (felts)

The maximum length of a transaction calldata

5,000

5,000