# Support **URL:** https://community.starknet.io/c/help-and-support/support/5.md [Latest](https://community.starknet.io/latest.md) · [Categories](https://community.starknet.io/categories.md) · [Tags](https://community.starknet.io/tags.md) --- ## [About the Support category](https://community.starknet.io/t/about-the-support-category/17)
**Author:** [@system](https://community.starknet.io/u/system)\ **Replies:** 0\ **Last updated:** [October 28, 2021, 7:29am UTC](https://community.starknet.io/t/about-the-support-category/17 "2021-10-28T07:29:38Z")
This category provides support for users of StarkNet. However, for most StarkNet and Cairo support issues we recommend visiting our Discord or posting a question on StackOverflow. For quick support, please visit our sup… --- ## [Can I run a StarkNet full node?](https://community.starknet.io/t/can-i-run-a-starknet-full-node/26)
**Author:** [@henrli](https://community.starknet.io/u/henrli)\ **Replies:** 5\ **Last updated:** [November 7, 2025, 4:54am UTC](https://community.starknet.io/t/can-i-run-a-starknet-full-node/26 "2025-11-07T04:54:30Z")
Not at this phase. We’re currently developing the Constellations phase of StarkNet. See the planned roadmap here: In this phase we have one sequencer. A full node is currently being developed (but note that it’s not a … --- ## [Banned from discord](https://community.starknet.io/t/banned-from-discord/2049)
**Author:** [@sJJdGG](https://community.starknet.io/u/sJJdGG)\ **Replies:** 21\ **Last updated:** [October 27, 2025, 9:43am UTC](https://community.starknet.io/t/banned-from-discord/2049 "2025-10-27T09:43:47Z")
Hi I’ve joined StarkNet Discord server today. I don’t know what happend but I got banned right away. Maybe false positive action by bot I don’t know. Do you know anyone I can contact about it, I wanna use my main acco… --- ## [Check if address has a deployed contract](https://community.starknet.io/t/check-if-address-has-a-deployed-contract/344)
**Author:** [@martriay](https://community.starknet.io/u/martriay)\ **Replies:** 8\ **Last updated:** [July 17, 2025, 12:57am UTC](https://community.starknet.io/t/check-if-address-has-a-deployed-contract/344 "2025-07-17T00:57:32Z")
Unlike the EVM in StarknetOS all addresses correspond to contracts (not accounts), but I’m not sure what’s the preferred way to check whether a given address corresponds to a deployed smart contract or not? --- ## [Is it possible to use verify\_ecdsa\_signature in cairo to verify a web3.js/wallet ecdsa signature?](https://community.starknet.io/t/is-it-possible-to-use-verify-ecdsa-signature-in-cairo-to-verify-a-web3-js-wallet-ecdsa-signature/338)
**Author:** [@0xwalid](https://community.starknet.io/u/0xwalid)\ **Replies:** 5\ **Last updated:** [June 6, 2025, 10:16am UTC](https://community.starknet.io/t/is-it-possible-to-use-verify-ecdsa-signature-in-cairo-to-verify-a-web3-js-wallet-ecdsa-signature/338 "2025-06-06T10:16:54Z")
I am pretty new to Cairo and I am thinking of building a dApp that takes web3 wallet signatures and validate it in Cairo-based contract on Starknet. When using web3.js, I can sign a message like this: web3.eth.accounts… --- ## [How to verify the signature of a user who has not yet deployed their account?](https://community.starknet.io/t/how-to-verify-the-signature-of-a-user-who-has-not-yet-deployed-their-account/114823)
**Author:** [@biryusal](https://community.starknet.io/u/biryusal)\ **Replies:** 2\ **Last updated:** [October 4, 2024, 1:40am UTC](https://community.starknet.io/t/how-to-verify-the-signature-of-a-user-who-has-not-yet-deployed-their-account/114823 "2024-10-04T01:40:17Z")
I understand that a smart contract for an account is created only when the “Account was deployed” through a transaction. But is there any option to validate an account without first creating a wallet? I can call the si… --- ## [Implimenting interfaces and libraries in a contract](https://community.starknet.io/t/implimenting-interfaces-and-libraries-in-a-contract/114268)
**Author:** [@Sari2003](https://community.starknet.io/u/Sari2003)\ **Replies:** 1\ **Last updated:** [July 1, 2024, 2:59am UTC](https://community.starknet.io/t/implimenting-interfaces-and-libraries-in-a-contract/114268 "2024-07-01T02:59:17Z")
I have interfaces and libraries in different files and folders, I want to use them in a contract in my project, how can I use it ? how do I import them to my contract file? --- ## [STARKNET Analytics](https://community.starknet.io/t/starknet-analytics/113842)
**Author:** [@kaushik](https://community.starknet.io/u/kaushik)\ **Replies:** 0\ **Last updated:** [April 2, 2024, 1:00pm UTC](https://community.starknet.io/t/starknet-analytics/113842 "2024-04-02T13:00:31Z")
Hey Guys, I’m from PYOR, a blockchain and analytical firm backed by Castle Island and Coinbase Ventures, We provide customizable analytics dashboards for leading protocols like Compound, Tezos, Quickswap, and ICP. Aft… --- ## [Thailand Community](https://community.starknet.io/t/thailand-community/88346)
**Author:** [@nongwaan](https://community.starknet.io/u/nongwaan)\ **Replies:** 7\ **Last updated:** [February 6, 2024, 7:38am UTC](https://community.starknet.io/t/thailand-community/88346 "2024-02-06T07:38:15Z")
you can talk ask question and post all updated about Starknet here Thai languges is actcept here : )) ดีครับมาคุยกัน --- ## [How is Max tps calculated for Starknet?](https://community.starknet.io/t/how-is-max-tps-calculated-for-starknet/97033)
**Author:** [@Yona](https://community.starknet.io/u/Yona)\ **Replies:** 1\ **Last updated:** [November 22, 2023, 10:04am UTC](https://community.starknet.io/t/how-is-max-tps-calculated-for-starknet/97033 "2023-11-22T10:04:33Z")
Hi guys, i am yona. I saw on @henri.lieutaud tweet today that “Starcknet 0.12: Quantum Leap Upgrade” brings the benefits of a very high number of TPS. This was a very interesting thread for me, and congratulations on t… --- ## [Does a full node validate transactions?](https://community.starknet.io/t/does-a-full-node-validate-transactions/94464)
**Author:** [@beep](https://community.starknet.io/u/beep)\ **Replies:** 1\ **Last updated:** [June 5, 2023, 10:22am UTC](https://community.starknet.io/t/does-a-full-node-validate-transactions/94464 "2023-06-05T10:22:33Z")
I’m interested to run a full node to learn and participate the network. I bought a all-in-one box. I haven’t received it yet. I’m just curious if the node will validate the transactions in the future version? If so, whic… --- ## [Starknet Node- What is node?](https://community.starknet.io/t/starknet-node-what-is-node/1128)
**Author:** [@emirardagn](https://community.starknet.io/u/emirardagn)\ **Replies:** 5\ **Last updated:** [June 4, 2023, 11:33am UTC](https://community.starknet.io/t/starknet-node-what-is-node/1128 "2023-06-04T11:33:47Z")
guys i have a quesiton, what is node but i mean really, what is node? Please answer like i am 5, cause i’m trying to teach my young brother. --- ## [Any good dune dashboard recommended? (on our ecosystem)](https://community.starknet.io/t/any-good-dune-dashboard-recommended-on-our-ecosystem/93493)
**Author:** [@SPONGKY](https://community.starknet.io/u/SPONGKY)\ **Replies:** 5\ **Last updated:** [June 2, 2023, 1:42am UTC](https://community.starknet.io/t/any-good-dune-dashboard-recommended-on-our-ecosystem/93493 "2023-06-02T01:42:49Z")
can’t query efficiently myself and did search some but it’s quite scattered… quality one so far for my probably by @chaininsight / StarkNet Overview - but are there more, many of them are just copied paste for the reason… --- ## [Starknet curve libraries](https://community.starknet.io/t/starknet-curve-libraries/93855)
**Author:** [@sergei.boiko](https://community.starknet.io/u/sergei.boiko)\ **Replies:** 0\ **Last updated:** [May 26, 2023, 8:53am UTC](https://community.starknet.io/t/starknet-curve-libraries/93855 "2023-05-26T08:53:17Z")
Hello everybody, I’m working on integrating Starkex into Trust Wallet, and I’m looking for the Starknet Curve implementation either in C++ or Rust (preferred). What is the status of starknet-crypto? Has the StarkWare … --- ## [Withdrawal Time from L2 -\>L1](https://community.starknet.io/t/withdrawal-time-from-l2-l1/1819)
**Author:** [@asioflammeus](https://community.starknet.io/u/asioflammeus)\ **Replies:** 5\ **Last updated:** [March 31, 2023, 1:41pm UTC](https://community.starknet.io/t/withdrawal-time-from-l2-l1/1819 "2023-03-31T13:41:02Z")
Hey there, I tried StarkGate, things went pretty smooth form L1 to L2. And then latter on i tried to Withdraw from L2 to L1. First i struggled and the transaction was refused several time. Finally it did work. However,… --- ## [Starknet email avatar](https://community.starknet.io/t/starknet-email-avatar/72911)
**Author:** [@HUANGMENG](https://community.starknet.io/u/HUANGMENG)\ **Replies:** 0\ **Last updated:** [March 29, 2023, 12:53pm UTC](https://community.starknet.io/t/starknet-email-avatar/72911 "2023-03-29T12:53:09Z")
I have a suggestion, can you change the avatar of starknet official mailbox to Starknet, I personally think that is cooler Gives a very official feeling Can the team adopt my suggestion starknet gm Because every time I … --- ## [Starknet Goerli bridge not working properly](https://community.starknet.io/t/starknet-goerli-bridge-not-working-properly/57586)
**Author:** [@Heyqel](https://community.starknet.io/u/Heyqel)\ **Replies:** 1\ **Last updated:** [March 24, 2023, 2:21am UTC](https://community.starknet.io/t/starknet-goerli-bridge-not-working-properly/57586 "2023-03-24T02:21:40Z")
An error occurred while using the bridge on the Starknet network, I would like to inform you about it. While I could transfer eth from Goerli eth to starknet without any problem, I could not from starknet. The test token… --- ## [Profile twitter page?!](https://community.starknet.io/t/profile-twitter-page/17374)
**Author:** [@moeen](https://community.starknet.io/u/moeen)\ **Replies:** 7\ **Last updated:** [March 21, 2023, 2:06am UTC](https://community.starknet.io/t/profile-twitter-page/17374 "2023-03-21T02:06:35Z")
I create an account on the delegate, and it automatically loads a twitter ID for my wallet! Can you share where you read this data? as it’s my old twitter handle and I need to change it --- ## [How to invite people?](https://community.starknet.io/t/how-to-invite-people/18535)
**Author:** [@Burger](https://community.starknet.io/u/Burger)\ **Replies:** 7\ **Last updated:** [March 17, 2023, 3:39am UTC](https://community.starknet.io/t/how-to-invite-people/18535 "2023-03-17T03:39:21Z")
I know it’s a stupid question, but I can’t find the answer. :joy: --- ## [How can I derive BigInt3/EcPoints from an ethereum public key and signature?](https://community.starknet.io/t/how-can-i-derive-bigint3-ecpoints-from-an-ethereum-public-key-and-signature/351)
**Author:** [@0xwalid](https://community.starknet.io/u/0xwalid)\ **Replies:** 8\ **Last updated:** [November 15, 2022, 8:43am UTC](https://community.starknet.io/t/how-can-i-derive-bigint3-ecpoints-from-an-ethereum-public-key-and-signature/351 "2022-11-15T08:43:06Z")
Recently @liorgold published a cairo-examples/secp at master · starkware-libs/cairo-examples · GitHub which introduces support to the ECDSA signature verification over the secp256k1 elliptic curve. I am trying to use the… --- ## [How to add Starknet net to MetaMask?](https://community.starknet.io/t/how-to-add-starknet-net-to-metamask/933)
**Author:** [@AlanGrid](https://community.starknet.io/u/AlanGrid)\ **Replies:** 9\ **Last updated:** [November 15, 2022, 4:55am UTC](https://community.starknet.io/t/how-to-add-starknet-net-to-metamask/933 "2022-11-15T04:55:12Z")
Hi, guys! Could you explain how to make funds of @Starknet visible in @MetaMask after bridging from the ETH mainnet, in other words, how to add Starknet net to MetaMask? --- ## [Cairo's playground bitwise operations challenge](https://community.starknet.io/t/cairos-playground-bitwise-operations-challenge/2204)
**Author:** [@henryf10h](https://community.starknet.io/u/henryf10h)\ **Replies:** 3\ **Last updated:** [November 4, 2022, 8:49pm UTC](https://community.starknet.io/t/cairos-playground-bitwise-operations-challenge/2204 "2022-11-04T20:49:01Z")
Hello, any clue in how to solve bitwise opertion’s challenge? So far I tried the below code: %builtins bitwise from starkware.cairo.common.bitwise import bitwise\_and, bitwise\_xor from starkware.cairo.common.cairo\_buil… --- ## [Continuous memory: Exercise I](https://community.starknet.io/t/continuous-memory-exercise-i/2628)
**Author:** [@henryf10h](https://community.starknet.io/u/henryf10h)\ **Replies:** 1\ **Last updated:** [November 4, 2022, 10:25am UTC](https://community.starknet.io/t/continuous-memory-exercise-i/2628 "2022-11-04T10:25:11Z")
We need to: “Add one instruction at the end of the function (just before ret ) so that there won’t be a memory gap”. Here is the code: func main() { \[ap\] = 100; \[ap + 2\] = 200; ret; } --- ## [Do we need to add our argentX account to accounts.json](https://community.starknet.io/t/do-we-need-to-add-our-argentx-account-to-accounts-json/1102)
**Author:** [@degendeveloper.eth](https://community.starknet.io/u/degendeveloper.eth)\ **Replies:** 0\ **Last updated:** [April 17, 2022, 12:20am UTC](https://community.starknet.io/t/do-we-need-to-add-our-argentx-account-to-accounts-json/1102 "2022-04-17T00:20:34Z")
Do I need to add my argentX wallet to accounts.json? Can I leave it empty? Could I use a burner or should I use the account being used for tutorials --- ## [Starkware products ecosystem - how to start? (chess game example)](https://community.starknet.io/t/starkware-products-ecosystem-how-to-start-chess-game-example/1829)
**Author:** [@bdev](https://community.starknet.io/u/bdev)\ **Replies:** 0\ **Last updated:** [July 18, 2022, 9:17am UTC](https://community.starknet.io/t/starkware-products-ecosystem-how-to-start-chess-game-example/1829 "2022-07-18T09:17:09Z")
Trying to understand how to start with starkware products. Let’s imagine I want to build simple blockchain chess game: Round starts: black and white can move one after another. We have a prize for this game. Anyone ca… --- ## [Eth on starkgate has been stolen](https://community.starknet.io/t/eth-on-starkgate-has-been-stolen/2116)
**Author:** [@wuwu](https://community.starknet.io/u/wuwu)\ **Replies:** 1\ **Last updated:** [October 11, 2022, 3:21am UTC](https://community.starknet.io/t/eth-on-starkgate-has-been-stolen/2116 "2022-10-11T03:21:25Z")
It’s been six days, but I can’t see the button for the second step of the signature coin withdrawal on the starkgate website, ETH is missing, and I haven’t successfully withdrawn to L1. the method in the forum doesn’t wo… --- ## [Is there tutorial for ERC721 compilation and deployment on starknet, I'm kinda messed up in this, please help me out](https://community.starknet.io/t/is-there-tutorial-for-erc721-compilation-and-deployment-on-starknet-im-kinda-messed-up-in-this-please-help-me-out/2012)
**Author:** [@itsmeN](https://community.starknet.io/u/itsmeN)\ **Replies:** 2\ **Last updated:** [September 4, 2022, 5:26pm UTC](https://community.starknet.io/t/is-there-tutorial-for-erc721-compilation-and-deployment-on-starknet-im-kinda-messed-up-in-this-please-help-me-out/2012 "2022-09-04T17:26:31Z")
There is only 1 video of starkware for erc20 and erc721 but when I’m trying to follow its steps but I’m getting openzeppelin contracts error even I installed the package. --- ## [I'm cloning the repository of ERC721 and when I compiled I got this error](https://community.starknet.io/t/im-cloning-the-repository-of-erc721-and-when-i-compiled-i-got-this-error/2011)
**Author:** [@itsmeN](https://community.starknet.io/u/itsmeN)\ **Replies:** 3\ **Last updated:** [September 3, 2022, 6:32pm UTC](https://community.starknet.io/t/im-cloning-the-repository-of-erc721-and-when-i-compiled-i-got-this-error/2011 "2022-09-03T18:32:49Z")
Compiling contracts/token/ERC721/TDERC721\_metadata.cairo /Users/noraizabid/Downloads/starknet-erc721/contracts/token/ERC721/ERC721\_Metadata\_base.cairo:9:6: Could not find module ‘openzeppelin.introspection.ERC165’. Sear… --- ## [What's the gas cost of a STARK verifier on Ethereum?](https://community.starknet.io/t/whats-the-gas-cost-of-a-stark-verifier-on-ethereum/1814)
**Author:** [@xhliu](https://community.starknet.io/u/xhliu)\ **Replies:** 0\ **Last updated:** [July 15, 2022, 9:05pm UTC](https://community.starknet.io/t/whats-the-gas-cost-of-a-stark-verifier-on-ethereum/1814 "2022-07-15T21:05:47Z")
According to this doc, it is ~2.5M. However, that was estimated ~4 years ago, without an implementation. What is the latest size? Any verifier contract on the mainnet to check? --- ## [Maximum storage a contract could hold?](https://community.starknet.io/t/maximum-storage-a-contract-could-hold/1192)
**Author:** [@degendeveloper.eth](https://community.starknet.io/u/degendeveloper.eth)\ **Replies:** 1\ **Last updated:** [May 5, 2022, 3:33am UTC](https://community.starknet.io/t/maximum-storage-a-contract-could-hold/1192 "2022-05-05T03:33:47Z")
What is the theoretical maximum amount of storage a contract could hole? If I were to implement a stack using a storage\_var func myStack(index: felt) → (value: felt): end There could be a total of 2^32-1 total index’… [Next page](https://community.starknet.io/c/help-and-support/support/5.md?page=1)