Signature Minting, also known as "on-demand minting," allows a contract administrator to grant users the ability to mint tokens from a contract that implements one of the extensions:
ERC20SignatureMint. This action requires a cryptographic signature and is limited to wallets assigned the
This allows you to conditionally generate signatures based on some condition/criteria, or allow a user to mint tokens with admin or user-specified metadata.
- Ownership Verification: By requiring a signature, the system can ensure that the entity trying to mint a token has the right to do so.
- Data Integrity: The cryptographic signature ensures that if the transaction data is altered, the signature becomes invalid.
- Enhanced Security: Only
MINTER-designated wallets can generate signatures, and only entities with the correct signature can mint tokens.
- Smart Contract Control: By incorporating signature verification within the smart contract, you can add additional security logic around the minting process.
- Reduced Risk of Human Error: Automated systems that require cryptographic signatures for minting are generally less prone to human error than manual methods.
- Custom metadata: In the case of minting NFTs with signature minting, you can allow users to add custom artwork for their NFT metadata.
- Whitelisting: Decide on a case-by-case basis whether a user can claim and what their claim conditions are.
Signature minting facilitates a range of use cases including, but not limited to:
- Allowing NFT holders to mint for free
- Creating a community-made NFT collection
- Restricted mints to users who are GitHub contributors
- Restricted mints to Discord members
- Allowing users to add custom artwork for their NFTs metadata
- Marking NFT metadata with user-specific or off-chain information
Signature Minting in the Solidity SDK
Add signature minting to your smart contract by using the following extensions:
Pre-Built Contracts Implementing Signature Minting
Example use cases that the thirdweb pre-built contracts solve:
- Self-Minting: For example, a user can mint their Twitter profile picture as an NFT on their own contract.
- Audience Minting:
- Pre-defined Content: The admin pre-determines the nature of tokens, such as in a 10k NFT drop.
- Dynamic Content: Tokens are not pre-defined, enabling real-time customization like a course completion certificate with the participant's name.
By implementing Signature Minting, you are adopting a scalable, secure, and versatile mechanism for minting digital assets.