Chain information

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Current versions

Environment	Starknet version	Sierra version	Cairo version
Mainnet	0.14.2	1.7.0	2.0.0 - 2.18.0
Sepolia	0.14.3	1.9.0	2.0.0 - 2.19.0

Current limits (mainnet)

The following limits are subject to revisions and change on a regular basis

Starting from v0.13.0, blockifier-related constants and limits are defined for each Starknet version in a JSON file called versioned_constants in the blockifier’s resources directory.

Starting from v0.13.5, resources are denominated in units of L2 gas, L1 gas, and L1 data gas.

Entity	Description	Limit
Block time	The maximum amount of time within which a preconfirmed block is closed, if no other limit is met	9.5 seconds
Block recommended time	The amount of time after which preconfirmed block is closed, if there are no transactions in the mempool and no transactions being executed ATM	2 seconds
Max L2 gas per block	The maximum amount of L2 gas that a block can contain Note: This limit ensures block production times remains consistent and predictable.	6 * 10^9
Max transactions per block	The maximum amount of transactions in a single block	500
Max L2 gas per transaction	The maximum number of computational steps, measured in L2 gas, that a transaction can contain when processed on the Starknet network Note: This limit is important for ensuring the efficient execution of transactions and preventing potential congestion.	1.1*10^9
Max state updates per transaction	The maximum number of storage updates that a single transaction can generate Note: This limit helps maintain network stability and predictable performance.	2,490
Max number of events per transaction	The maximum number of events that a transaction can emit during its execution	1,000
Max number of data felts per event	The maximum number of felts that an event can contain in its data array	300
Max number of key felts per event	The maximum number of felts that an event can contain in its keys array	50
Max L2 gas for validate	The maximum number of computational steps, measured in Cairo steps, for a validate function	10^8
Max contract bytecode size	The maximum size of the bytecode or program that a smart contract can have on Starknet	81,920 felts
Max contract class size	The maximum size for the Sierra file of a contract class within Starknet Note: This limit is important for ensuring the network’s scalability and security.	4,089,446 bytes
IP address limits	The amount of contract reads that a single IP address can make (in order to reduce network spam)	200 per min per IP address
Signature length	The maximum length of a signature	4,000 felts
Calldata length	The maximum length of a transaction calldata	5,000 felts

Block builtin limits

Currently, block builtin limits apply only for Sepolia.

For more information, see the release notes for Starknet version 0.13.6.

Builtin	Limit
Range Check	57,142,857
ECDSA	3,000
Poseidon	479,961
Pedersen	493,827
Bitwise	6,861,063
EC OP	6,994
Keccak	9,790
Range Check 96	71,428,571
Add Mod	16,000,000
Mul Mod	6,622,516

Deprecated features

A deprecated feature is a feature that is still supported, but support will be removed in a future release of Starknet.

Name	Description
Cairo 0	Starknet v0.11.0 introduces Cairo 1.0 smart contracts.
Transaction signing only over two resources	RPC version 0.8, introduced in Starknet 0.13.5, only supports v3 transactions that sign over three resources (L1 gas, L2 gas and L1 data gas), removing support for transaction versions v0, v1, and v2, and for v3 transactions that sign only over two resources (L1 gas and L2 gas). Starting from version v0.14.0, Starknet will stop accepting these transactions altogether, and will only accept v3 transactions compliant with RPC 0.8.

Unsupported and removed features

An unsupported feature is a feature that is no longer supported.

A removed feature is a feature that has been entirely removed.

Name	Description
Starknet CLI	Support for the Starknet CLI has been removed. Instead use Starkli or Starknet Foundry's sncast.
Goerli testnet	Goerli testnet support was removed April 2, 2024. Sepolia testnet replaces Goerli testnet. Starknet started migrating to Sepolia testnet on November 15th, 2023. For more information on the Goerli deprecation, see the deprecation announcement on Ethereum’s site. Full nodes, API services, SDKs, and other Starknet developer tools have migrated to Sepolia as well. Note: Sepolia’s state and history are relatively small. Sepolia supports declaring classes of CairoZero and Cairo v2.0.0 and higher.
Starknet feeder gateway	The Starknet feeder gateway, a temporary solution for querying the sequencer’s state, is being replaced by Starknet full nodes (Pathfinder, Juno, Deoxys, Papyrus) and RPC services. For more information, see Full nodes and API services. Support for the feeder gateway queries that are not required for full nodes to synchronize on the state of Starknet will stop according to the following schedule: Environment | Date Integration | 1 November 2023 Testnet | 15 November 2023 Mainnet | 19 December 2023 Queries that are required for full nodes to synchronize on the state of Starknet are still supported. For more information, see the Community Forum post Feeder Gateway Deprecation.
Free L1-> L2 messaging	Previously, sending a message from L1 to L2 had an optional fee associated. From Starknet v0.11.0, the fee mechanism is enforced and the ability to send L1->L2 messages without the corresponding L2 fee has been removed. See here for more details.
invoke transaction v0	invoke transaction v0 has been removed since Starknet v0.11.0.
declare transaction v0	declare transaction v0 has been removed since Starknet v0.11.0.
deploy transaction	The deploy transaction has been removed since Starknet v0.10.3. To deploy new contract instances, you can use the deploy system call.

Important addresses

General

Mainnet

Sequencer base URL	alpha-mainnet.starknet.io
Core contract	0xc662c410C0ECf747543f5bA90660f6ABeBD9C8c4
SHARP verifier contract	0x47312450B3Ac8b5b8e247a6bB6d523e7605bDb60

Sepolia

Sequencer base URL	alpha-sepolia.starknet.io
Core contract	0xE2Bb56ee936fd6433DC0F6e7e3b8365C906AA057
SHARP verifier contract	0x07ec0D28e50322Eb0C159B9090ecF3aeA8346DFe

Tokens

Mainnet

STRK contract	0x04718f5a0fc34cc1af16a1cdee98ffb20c31f5cd61d6ab07201858f4287c938d
ETH contract	0x049d36570d4e46f48e99674bd3fcc84644ddd6b96f7c741b1562b82f9e004dc7
vSTRK contract	0x0782f0ddca11d9950bc3220e35ac82cf868778edb67a5e58b39838544bc4cd0f

Sepolia

STRK contract	0x04718f5a0fc34cc1af16a1cdee98ffb20c31f5cd61d6ab07201858f4287c938d
ETH contract	0x049d36570d4e46f48e99674bd3fcc84644ddd6b96f7c741b1562b82f9e004dc7
vSTRK contract	0x035c332b8de00874e702b4831c84b22281fb3246f714475496d74e644f35d492

StarkGate

Mainnet

StarkgateManager contract	0x0c5aE94f8939182F2D06097025324D1E537d5B60
StarkgateRegistry contract	0x1268cc171c54F2000402DfF20E93E60DF4c96812
L1 StarknetTokenBridge contract	0xF5b6Ee2CAEb6769659f6C091D209DfdCaF3F69Eb
L2 StarknetTokenBridge contract	0x0616757a151c21f9be8775098d591c2807316d992bbc3bb1a5c1821630589256
Bridged tokens	https://github.com/starknet-io/starknet-addresses/blob/master/bridged_tokens/mainnet.json

Sepolia

Bridged tokens	https://github.com/starknet-io/starknet-addresses/blob/master/bridged_tokens/sepolia.json

Staking

Mainnet

Staking contract	0x00ca1702e64c81d9a07b86bd2c540188d92a2c73cf5cc0e508d949015e7e84a7
L1 Reward supplier contract	0xCa1406D57eD09947E68DE121316C87113fBE9ff5
L2 Reward supplier contract	0x009035556d1ee136e7722ae4e78f92828553a45eed3bc9b2aba90788ec2ca112
Mint manager contract	0xCa14076A3cec95448BaD179cc19B351A4204B88B
Minting curve contract	0x00ca1705e74233131dbcdee7f1b8d2926bf262168c7df339004b3f46015b6984
Attestation contract	0x10398fe631af9ab2311840432d507bf7ef4b959ae967f1507928f5afe888a99

Stakable tokens
STRK	0x04718f5a0fc34cc1af16a1cdee98ffb20c31f5cd61d6ab07201858f4287c938d
WBTC	0x03fe2b97c1fd336e750087d68b9b867997fd64a2661ff3ca5a7c771641e8e7ac
SolvBTC	0x0593e034dda23eea82d2ba9a30960ed42cf4a01502cc2351dc9b9881f9931a68
tBTC	0x04daa17763b286d1e59b97c283c0b8c949994c361e426a28f743c67bdfe9a32f
LBTC	0x036834a40984312f7f7de8d31e3f6305b325389eaeea5b1c0664b2fb936461a4

Sepolia

Staking contract	0x03745ab04a431fc02871a139be6b93d9260b0ff3e779ad9c8b377183b23109f1
L1 Reward supplier contract	0xE58d25681B9d290D60e4d7f379a05d5BFD973fFB
L2 Reward supplier contract	0x02ebbebb8ceb2e07f30a5088f5849afd4f908f04f3f9c97c694e5d83d2a7cc61
Mint manager contract	0x648D1B35a932F5189e7ff97b2F795E03734DE4ce
Minting curve contract	0x06043928ca93cff6d6f39378ba391d7152eea707bdd624c1b2074e71af2abaca
Attestation contract	0x03f32e152b9637c31bfcf73e434f78591067a01ba070505ff6ee195642c9acfb

Stakable tokens
STRK	0x04718f5a0fc34cc1af16a1cdee98ffb20c31f5cd61d6ab07201858f4287c938d
TestBTC1 token	0x044ad07751ad782288413c7db42c48e1c4f6195876bca3b6caef449bb4fb8d36
TestBTC2 token	0x07e97477601e5606359303cf50c050fd3ba94f66bd041f4ed504673ba2b81696