Getting Started
- Welcome to thirdweb!
  - Intro to our resources
  - How to get support from the thirdweb team
  - Learn about how the Support AI Assistant works
Smart Contracts
- Explore
  - Explore FAQs
- Publish
  - Publish FAQs
- Build
  - Build FAQs
- Deploy
  - Deploy FAQs
- Interact
  - Claim from drop contract using contract explorer
  - Interact FAQs
  - Importing non-thirdweb contracts into the Dashboard
  - Airdrop Contract Troubleshooting
  - Trouble Claiming from the Embed
  - Customizing the Embed
  - Batch Upload Troubleshooting
  - Transferring ownership of a contract
  - How to close Auction Listings in a Marketplace
  - Take a Snapshot of Existing Holders
  - openPack Function out of gas
  - NFT Drop claim function parameters
  - NFT metadata structure
  - WalletConnect Prefab Required for Connect Wallet (Native) Prefab
  - How to use the multicall() function
  - Updating already minted NFT metadata
  - Start Token ID at 1 instead of 0
  - Why can’t I claim an NFT from the embed on mobile?
  - Where can I see the audited contract reports?
  - How can I get my NFTs to show up on OpenSea or other marketplaces?
  - What are Platform Fees?
  - Why am I unable to use the same token for staking and rewards?
  - Understanding gas, Gwei, and cost saving strategies
  - How to make your NFTs non-transferrable aka Soulbound
  - SetApprovalForAll: what it means to grant access to all your NFTs
  - Staking Contract Troubleshooting - Not Owned or Approved
Wallets
- Auth
  - Auth FAQs
- Smart Wallet
  - Smart Wallet FAQs
  - API Key for Smart Wallets
- Embedded Wallet
  - Embedded Wallet FAQs
  - Invalid recovery code on embedded wallet
- Connect
  - Connect FAQs
Infrastructure
- Storage
  - Storage FAQs
- RPC Edge
  - RPC Edge FAQs
  - Adding a Custom RPC to your app
- Engine
  - How to deploy thirdweb Engine to your local machine
  - How to deploy your self-hosted thirdweb Engine on the Railway
  - How to deploy contracts using OP Credits with thirdweb Engine
  - How to resolve ensure that your Engine is publicly accessible issue?
  - What is the difference between cloud-hosted and self-hosted thirdweb Engine?
Payments
- Sponsored Transactions
  - Adding a Gasless Relayer in your app
Troubleshooting Errors
- Application Errors
  - “This action requires a connected wallet to sign the transaction. Please pass a valid signer to the SDK.”
  - 429 Client Error: Too Many Requests
  - Error: invalid hash with gasless relayer
  - Message: ethjs-query] while formatting outputs from RPC
  - Transaction underpriced
  - Replacement transaction underpriced
  - Unity Error: "Multiple precompiled assemblies with the same name Newtonsoft.Json.dll included on the current platform”
  - Unity SDK Error: this functionality is not yet supported on the current platform
  - Module not found: Can't resolve '@walletconnect/legacy-client’
  - How to share your console log errors
  - VERIFY_OWNERSHIP_WITH_PAPER_EVENT_TYPE Error
  - 401 Unauthorized
- Contract Errors
  - Execution Reverted: !Tokens
  - Execution reverted: !QTY
  - Execution reverted: ST
  - ERR_FAILED_413
  - Insufficient funds for gas * price + value
  - Insufficient funds for intrinsic transaction cost
  - Execution reverted: !BAL20
  - Execution reverted: !BALNFT
  - Execution reverted: proof claimed
  - Execution reverted: !ADMIN
  - Execution reverted: !CONDITION
  - Execution Reverted: Not within the sale window
  - Error: ERC20 - Transfer Amount Exceeds Allowance
  - Execution Reverted: !Amt Error
  - Error: Unauthorized - You don't have permission to use this service
  - Minter permission on smart contract
- CLI Errors
  - npm ERR! syscall spawn git
  - How to solve an Unexpected token '&&=' error
  - Issue linking device on the authorization page via thirdweb cli
Other FAQs
- Security & Privacy FAQs
  - Security & Privacy FAQ
- Billing FAQs
  - Billing FAQs
- Other thirdweb FAQs
  - Check if an EVM address is a contract or wallet using thirdweb SDK
  - How to add your EVM chain to thirdweb’s Chainlist?
  - Paper joining thirdweb FAQs
  - Tipping Policy
  - How to transfer native tokens using thirdweb SDK
  - How to upload a single NFT via thirdweb explorer?
  - How to secure your API keys
- Opensea/Secondary Marketplaces
  - NFTs Aren’t Revealing
  - My Collection is Not Showing Up
  - Blur Marketplace
  - SuperRare Marketplace
  - Mint.Fun Marketplace
  - When will my collection show up on OpenSea?
- Block Explorers (i.e. Etherscan)
  - Token verification on Etherscan
  - How to verify thirdweb prebuilt contracts
  - Blockscout API contract verification
  - Find contract address from transaction hash
More

Adding a Gasless Relayer in your app

Many contracts add a gasless relayer to cover the cost of gas on behalf of their customers. To set up a gasless relayed on your contract, follow one of these guides here:

OpenZepplin

Biconomy

After configuring, if you are having issues setting up your gasless relayer after following the guide continue with the troubleshooting below.

Common Gasless Relayer Errors:

If you are seeing an Uncaught (in promise) Error: invalid hash error message when trying to transact, see this article here.

Make sure your gasless relayer has enough funds to cover the cost of transactions on behalf of your users

If you’re issue still persists or you are receiving an error not listed above, please reach out to our team for support.

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What is the difference between cloud-hosted and self-hosted thirdweb Engine? “This action requires a connected wallet to sign the transaction. Please pass a valid signer to the SDK.”