# Developers **URL:** https://forum.celo.org/c/developers/32.md [Latest](https://forum.celo.org/latest.md) · [Categories](https://forum.celo.org/categories.md) · [Tags](https://forum.celo.org/tags.md) --- ## [About the Developers category](https://forum.celo.org/t/about-the-developers-category/3332)
**Author:** [@annaalexa](https://forum.celo.org/u/annaalexa)\ **Replies:** 0\ **Last updated:** [April 15, 2022, 5:25pm UTC](https://forum.celo.org/t/about-the-developers-category/3332 "2022-04-15T17:25:41Z")
Welcome to the Developer Category of the Celo Forum. Here you will find resources for how to get started building on the Celo blockchain. Check out the list of resources to get started. Celo Docs Celo Docs Education D… --- ## [Handling RPC handshake drops during mobile script execution tests](https://forum.celo.org/t/handling-rpc-handshake-drops-during-mobile-script-execution-tests/13851)
**Author:** [@zehal0674](https://forum.celo.org/u/zehal0674)\ **Replies:** 1\ **Last updated:** [October 1, 2026, 1:11pm UTC](https://forum.celo.org/t/handling-rpc-handshake-drops-during-mobile-script-execution-tests/13851 "2026-10-01T13:11:15Z")
Hi everyone, I have been trying to set up an automated test harness on an Android device to simulate repeated micro-transactions on an Alfajores test dApp, but I keep running into consistent connection drops during state… --- ## [\[Help needed\] Accidentally sent stCELO to the wrong address](https://forum.celo.org/t/help-needed-accidentally-sent-stcelo-to-the-wrong-address/13639)
**Author:** [@douglasqian](https://forum.celo.org/u/douglasqian)\ **Replies:** 1\ **Last updated:** [July 29, 2026, 7:33am UTC](https://forum.celo.org/t/help-needed-accidentally-sent-stcelo-to-the-wrong-address/13639 "2026-07-29T07:33:41Z")
Hi there, My cofounder and I were moving some funds around and accidentally sent about $12,000 worth of stCELO to the wrong address. Instead of sending it to her wallet address, I accidentally sent it to the stCELO toke… --- ## [NaijaLancers Developer Portal — API Infrastructure for Payments, Escrow & Web3 Onboarding on Celo](https://forum.celo.org/t/naijalancers-developer-portal-api-infrastructure-for-payments-escrow-web3-onboarding-on-celo/13376)
**Author:** [@bbb](https://forum.celo.org/u/bbb)\ **Replies:** 0\ **Last updated:** [June 2, 2026, 1:47pm UTC](https://forum.celo.org/t/naijalancers-developer-portal-api-infrastructure-for-payments-escrow-web3-onboarding-on-celo/13376 "2026-06-02T13:47:55Z")
:label: Project Details Project Name: NaijaLancers Developer Portal Founder: Awwal Dayyabu Support Email: support@naijalancers.name.ng Live Portal: naijalancers.name.ng/developer GitHub: github.com/Awwal1111/naija-onboa… --- ## [URGENT: MiniPay App Network Timeout Bug - $5,975 Stuck in Holding Contract (Ticket #23882027)](https://forum.celo.org/t/urgent-minipay-app-network-timeout-bug-5-975-stuck-in-holding-contract-ticket-23882027/13321)
**Author:** [@Drakemarho](https://forum.celo.org/u/Drakemarho)\ **Replies:** 1\ **Last updated:** [May 24, 2026, 10:24pm UTC](https://forum.celo.org/t/urgent-minipay-app-network-timeout-bug-5-975-stuck-in-holding-contract-ticket-23882027/13321 "2026-05-24T22:24:53Z")
Hello Celo / Mento Devs, I urgently need an Opera/MiniPay engineer to look at a smart contract trapped $5,975 of my funds. Tier 1 Support is stuck on routing failure that has automated scripts and isn’t looking at the bl… --- ## [NaijaLancers Celo Wallet API – Live, Fast, Secure, and Global](https://forum.celo.org/t/naijalancers-celo-wallet-api-live-fast-secure-and-global/13030)
**Author:** [@Awwal1](https://forum.celo.org/u/Awwal1)\ **Replies:** 0\ **Last updated:** [February 14, 2026, 2:03pm UTC](https://forum.celo.org/t/naijalancers-celo-wallet-api-live-fast-secure-and-global/13030 "2026-02-14T14:03:51Z")
Hello Celo Community :waving\_hand:, I’m Awwal Dayyabu, founder of NaijaLancers. We built a live Celo Wallet API so developers can integrate CELO, cUSD, and USDT wallets into apps without worrying about complex blockchai… --- ## [X402 Facilitator Now Live on Celo](https://forum.celo.org/t/x402-facilitator-now-live-on-celo/12768)
**Author:** [@UltravioletaDAO](https://forum.celo.org/u/UltravioletaDAO)\ **Replies:** 0\ **Last updated:** [December 12, 2025, 2:35am UTC](https://forum.celo.org/t/x402-facilitator-now-live-on-celo/12768 "2025-12-12T02:35:17Z")
Introducing the x402 Facilitator on Celo Hello Celo community, We’d like to share one of the tools we’ve been developing at Ultravioleta DAO: the x402 Facilitator, now available on Celo and open for anyone in the commun… --- ## [🧑‍💻 Celo Fam, we need your brainpower! Test the Hup Protocol (Decentralized Social/Identity)](https://forum.celo.org/t/celo-fam-we-need-your-brainpower-test-the-hup-protocol-decentralized-social-identity/12698)
**Author:** [@atenyun](https://forum.celo.org/u/atenyun)\ **Replies:** 0\ **Last updated:** [November 26, 2025, 11:57pm UTC](https://forum.celo.org/t/celo-fam-we-need-your-brainpower-test-the-hup-protocol-decentralized-social-identity/12698 "2025-11-26T23:57:05Z")
Hey everyone! The last thread got scrubbed, so let’s try this again—straight to the Devs section. We’re building Hup, a decentralized social and coordination layer. Think of it as a resilient, multi-chain-ready home for… --- ## [Celora Pay: The Next-Generation Decentralized Payment Gateway on Celo](https://forum.celo.org/t/celora-pay-the-next-generation-decentralized-payment-gateway-on-celo/12558)
**Author:** [@Voiden7](https://forum.celo.org/u/Voiden7)\ **Replies:** 0\ **Last updated:** [October 28, 2025, 4:16pm UTC](https://forum.celo.org/t/celora-pay-the-next-generation-decentralized-payment-gateway-on-celo/12558 "2025-10-28T16:16:22Z")
Introducing Celora Pay, a decentralized payment gateway built on the Celo blockchain. The platform enables merchants and service providers to accept crypto payments effortlessly, with support for CELO, Celo stablecoins, … --- ## [New release of Celocli 7.1.0](https://forum.celo.org/t/new-release-of-celocli-7-1-0/12227)
**Author:** [@aaronmgdr](https://forum.celo.org/u/aaronmgdr)\ **Replies:** 2\ **Last updated:** [September 1, 2025, 11:03am UTC](https://forum.celo.org/t/new-release-of-celocli-7-1-0/12227 "2025-09-01T11:03:08Z")
This is a small release that brings first class support for celo-sepolia and core contracts release 13 new alias for –node =\> –rpc-url more details: Release @celo/celocli@7.1.0 · celo-org/developer-tooling · GitHub --- ## [From NFT Minting to Marketplace: A Full-Stack Guide for Blockchain Developers](https://forum.celo.org/t/from-nft-minting-to-marketplace-a-full-stack-guide-for-blockchain-developers/11819)
**Author:** [@ainnovalinkinfotech](https://forum.celo.org/u/ainnovalinkinfotech)\ **Replies:** 1\ **Last updated:** [August 6, 2025, 4:19am UTC](https://forum.celo.org/t/from-nft-minting-to-marketplace-a-full-stack-guide-for-blockchain-developers/11819 "2025-08-06T04:19:00Z")
The NFT (Non-Fungible Token) ecosystem has rapidly evolved, offering endless opportunities for developers to build innovative platforms. Whether you’re a seasoned blockchain developer or just diving into Web3, understand… --- ## [Difficulty Integrating Custom Smart Contracts with Celo Wallets](https://forum.celo.org/t/difficulty-integrating-custom-smart-contracts-with-celo-wallets/10590)
**Author:** [@derektheler](https://forum.celo.org/u/derektheler)\ **Replies:** 0\ **Last updated:** [March 19, 2025, 9:39am UTC](https://forum.celo.org/t/difficulty-integrating-custom-smart-contracts-with-celo-wallets/10590 "2025-03-19T09:39:32Z")
Hello I am working on deploying a custom smart contract on the Celo blockchain but I’m running into issues when trying to interact with it using Celo wallets. :upside\_down\_face: While the contract deploys successfully a… --- ## [Upcoming Releases (Celocli, contractKit, ledger wallet)](https://forum.celo.org/t/upcoming-releases-celocli-contractkit-ledger-wallet/10250)
**Author:** [@aaronmgdr](https://forum.celo.org/u/aaronmgdr)\ **Replies:** 1\ **Last updated:** [February 19, 2025, 10:15am UTC](https://forum.celo.org/t/upcoming-releases-celocli-contractkit-ledger-wallet/10250 "2025-02-19T10:15:34Z")
CELOCLI 6.1.0 new command validator:send-payment (relevant post L2 switch) new command validatorgroup:rpc-urls improvments to derivation path support: sign with same addresses as on ledger live, with Eth standard path … --- ## [Celo Developer Relations 2024 Report](https://forum.celo.org/t/celo-developer-relations-2024-report/9759)
**Author:** [@sophia](https://forum.celo.org/u/sophia)\ **Replies:** 0\ **Last updated:** [December 20, 2024, 11:12pm UTC](https://forum.celo.org/t/celo-developer-relations-2024-report/9759 "2024-12-20T23:12:39Z")
Celo Developer Relations 2024 Report Hi Celo Community! Sophia, Lena, and Viral here from the Celo Foundation DevRel team. As 2024 comes to an end, we’re excited to share with the community an overview of what we accomp… --- ## [Upcoming Changes: Deprecation of Celo Precompiles and UsingPrecompilesContract Functions in L2 Migration](https://forum.celo.org/t/upcoming-changes-deprecation-of-celo-precompiles-and-usingprecompilescontract-functions-in-l2-migration/9421)
**Author:** [@soloseng](https://forum.celo.org/u/soloseng)\ **Replies:** 1\ **Last updated:** [November 8, 2024, 4:41pm UTC](https://forum.celo.org/t/upcoming-changes-deprecation-of-celo-precompiles-and-usingprecompilescontract-functions-in-l2-migration/9421 "2024-11-08T16:41:08Z")
As part of Celo’s transition to an L2 network, the Celo precompiles will be deprecated, impacting all functions from the UsingPrecompiles contract. If you’ve been using this contract to query historical data related to e… --- ## [Removing celocli account:recover-old](https://forum.celo.org/t/removing-celocli-account-recover-old/9335)
**Author:** [@aaronmgdr](https://forum.celo.org/u/aaronmgdr)\ **Replies:** 0\ **Last updated:** [October 25, 2024, 8:54am UTC](https://forum.celo.org/t/removing-celocli-account-recover-old/9335 "2024-10-25T08:54:31Z")
We are going to remove the recover-old command from celocli This ancient command was to fix a bug created in the beta version of Valora almost 4 years ago. We are confident there has been ample time for those that need… --- ## [cLabs DevTooling Team Report](https://forum.celo.org/t/clabs-devtooling-team-report/9173)
**Author:** [@aaronmgdr](https://forum.celo.org/u/aaronmgdr)\ **Replies:** 4\ **Last updated:** [October 11, 2024, 4:40pm UTC](https://forum.celo.org/t/clabs-devtooling-team-report/9173 "2024-10-11T16:40:54Z")
What Has the cLabs Developer tooling team been up to for the past few months? Celocli cel2 support Top priority for us has been ensuring tools like @celo/celocli have full compatibility with cel2. While maintaining backw… --- ## [These professionals specialize in developing state-of-the-art virtual reality applications](https://forum.celo.org/t/these-professionals-specialize-in-developing-state-of-the-art-virtual-reality-applications/8346)
**Author:** [@soyeh](https://forum.celo.org/u/soyeh)\ **Replies:** 0\ **Last updated:** [July 11, 2024, 9:39am UTC](https://forum.celo.org/t/these-professionals-specialize-in-developing-state-of-the-art-virtual-reality-applications/8346 "2024-07-11T09:39:57Z")
With the help of excellent VR app developers who bring life to immersive experiences, explore the world of virtual reality. These professionals specialize in developing state-of-the-art virtual reality applications for d… --- ## [Demo: Running a local Anvil devchain with core contracts in seconds](https://forum.celo.org/t/demo-running-a-local-anvil-devchain-with-core-contracts-in-seconds/8139)
**Author:** [@arthurgousset](https://forum.celo.org/u/arthurgousset)\ **Replies:** 0\ **Last updated:** [June 14, 2024, 1:57pm UTC](https://forum.celo.org/t/demo-running-a-local-anvil-devchain-with-core-contracts-in-seconds/8139 "2024-06-14T13:57:31Z")
Demo: Running a local Anvil devchain with all core contracts You can run a local anvil devchain with (most) core contracts using the latest @celo/devchain-anvil package. Context Foundry allows you to start a local anvil… --- ## [How to use bridgeToWithLz?](https://forum.celo.org/t/how-to-use-bridgetowithlz/8033)
**Author:** [@vnheros](https://forum.celo.org/u/vnheros)\ **Replies:** 1\ **Last updated:** [May 28, 2024, 12:02pm UTC](https://forum.celo.org/t/how-to-use-bridgetowithlz/8033 "2024-05-28T12:02:34Z")
I want to use bridgeToWithLz in this link: ERC1967Proxy | Address 0xa3247276dbcc76dd7705273f766eb3e8a5ecf4a5 | CeloScan How to use it? Thanks advance for your help! --- ## [\[Action Required\] Celo Legacy TX type deprecation](https://forum.celo.org/t/action-required-celo-legacy-tx-type-deprecation/7804)
**Author:** [@valentin](https://forum.celo.org/u/valentin)\ **Replies:** 2\ **Last updated:** [April 8, 2024, 8:44am UTC](https://forum.celo.org/t/action-required-celo-legacy-tx-type-deprecation/7804 "2024-04-08T08:44:50Z")
As was previously announced during the Gingerbread hardfork, two TX types were deprecated - Celo Legacy Type 0 TXs and CIP-42. This post gives some context on why it was done and contains a call to action for dApp devel… --- ## [USDC as an EasyFee using @celo/celocli](https://forum.celo.org/t/usdc-as-an-easyfee-using-celo-celocli/7803)
**Author:** [@arthurgousset](https://forum.celo.org/u/arthurgousset)\ **Replies:** 0\ **Last updated:** [April 4, 2024, 2:47pm UTC](https://forum.celo.org/t/usdc-as-an-easyfee-using-celo-celocli/7803 "2024-04-04T14:47:30Z")
Demo: USDC as an EasyFee using @celo/celocli You can see USDC as an EasyFee (or “fee currency”) is live using the latest @celo/celocli release (v5.0.0): # Install latest celocli $ yarn global add @celo/celocli@5.0.0 # … --- ## [SDK and CLI Releases March 2024](https://forum.celo.org/t/sdk-and-cli-releases-march-2024/7722)
**Author:** [@aaronmgdr](https://forum.celo.org/u/aaronmgdr)\ **Replies:** 2\ **Last updated:** [March 25, 2024, 1:08pm UTC](https://forum.celo.org/t/sdk-and-cli-releases-march-2024/7722 "2024-03-25T13:08:07Z")
cLabs developer tooling team has released betas for the next releases of the celocli and typescript sdks. Full release notes at Version Packages (beta) by github-actions\[bot\] · Pull Request #188 · celo-org/developer-too… --- ## [CeloCLI + contractkit for CoreContracts 11](https://forum.celo.org/t/celocli-contractkit-for-corecontracts-11/7589)
**Author:** [@aaronmgdr](https://forum.celo.org/u/aaronmgdr)\ **Replies:** 0\ **Last updated:** [March 7, 2024, 1:29pm UTC](https://forum.celo.org/t/celocli-contractkit-for-corecontracts-11/7589 "2024-03-07T13:29:42Z")
In anticipation of Core Contracts Release 11 being approved in CGP 159 CR11 specific versions of sdks have been released with following version numbers @celo/celocli at 4.2.0 @celo/contractkit at 7.2.0 @celo/govern… --- ## [New Prereleases for celocli ++](https://forum.celo.org/t/new-prereleases-for-celocli/7388)
**Author:** [@aaronmgdr](https://forum.celo.org/u/aaronmgdr)\ **Replies:** 0\ **Last updated:** [February 8, 2024, 8:33am UTC](https://forum.celo.org/t/new-prereleases-for-celocli/7388 "2024-02-08T08:33:40Z")
Good Morning. Good Day. SDK and CLI Betas We have released beta 1 of the next @celo/celocli 4.0 as well as betas for next @celo/contractkit, @celo/utils and other sdks These are the first releases since moving to the d… --- ## [New NPM package name: @celo/compliance (formerly, compliance-sdk)](https://forum.celo.org/t/new-npm-package-name-celo-compliance-formerly-compliance-sdk/7373)
**Author:** [@arthurgousset](https://forum.celo.org/u/arthurgousset)\ **Replies:** 0\ **Last updated:** [February 5, 2024, 6:09pm UTC](https://forum.celo.org/t/new-npm-package-name-celo-compliance-formerly-compliance-sdk/7373 "2024-02-05T18:09:08Z")
(Copy/pasting announcement from Github for visibility) TLDR The compliance-sdk package has moved to @celo/compliance This is only a package name change. The goal is to include it in the @celo/\* scope for security purpo… --- ## [Urgent Security Update (Ledger library vulnerability)](https://forum.celo.org/t/urgent-security-update-ledger-library-vulnerability/7066)
**Author:** [@arthurgousset](https://forum.celo.org/u/arthurgousset)\ **Replies:** 0\ **Last updated:** [December 14, 2023, 5:46pm UTC](https://forum.celo.org/t/urgent-security-update-ledger-library-vulnerability/7066 "2023-12-14T17:46:21Z")
Safety is of paramount importance to the cLabs team. We wanted to draw your attention to the recent announcement by Ledger of a vulnerability in recent versions of the Ledger connect-kit library due to an attacker insert… --- ## [Mandatory SocialConnect SDK Upgrade v5.1.0](https://forum.celo.org/t/mandatory-socialconnect-sdk-upgrade-v5-1-0/6857)
**Author:** [@Alec](https://forum.celo.org/u/Alec)\ **Replies:** 3\ **Last updated:** [November 22, 2023, 11:08pm UTC](https://forum.celo.org/t/mandatory-socialconnect-sdk-upgrade-v5-1-0/6857 "2023-11-22T23:08:47Z")
TLDR; All projects using SocialConnect must upgrade to v5.1.0^ of the @celo/identity SDK by 12/01/23 Hello SocialConnect devs! The @celo/identity package used to interact with SocialConnect provides a convenience funct… --- ## [Adding GoodDollar as gas token on Celo](https://forum.celo.org/t/adding-gooddollar-as-gas-token-on-celo/5383)
**Author:** [@sirpy](https://forum.celo.org/u/sirpy)\ **Replies:** 37\ **Last updated:** [October 18, 2023, 11:10pm UTC](https://forum.celo.org/t/adding-gooddollar-as-gas-token-on-celo/5383 "2023-10-18T23:10:47Z")
We are working to meet the requirements for adding GoodDollar as a gas token. Short recap: G$ recently launched on Celo, and will be bringing 10s of thousands of new users to the Celo ecosystem. Currently for easy web… --- ## [Can anyone recommend me a blockchain explorer extension?](https://forum.celo.org/t/can-anyone-recommend-me-a-blockchain-explorer-extension/6729)
**Author:** [@Roxy](https://forum.celo.org/u/Roxy)\ **Replies:** 0\ **Last updated:** [October 13, 2023, 7:59am UTC](https://forum.celo.org/t/can-anyone-recommend-me-a-blockchain-explorer-extension/6729 "2023-10-13T07:59:47Z")
:face\_with\_peeking\_eye: Hey there! Looks like we’ve got some MetaDock users in the group. I wanted to share that we’ve recently released MetaDock 4.0 version and support Celo now! It’s a free and open-source browser ex… [Next page](https://forum.celo.org/c/developers/32.md?page=1)