EVM Contract Call Challenge

EVM Contract Call Challenge is an anti-spam mechanism that verifies on-chain conditions before allowing a publication. It lets community owners require authors to meet smart-contract-defined criteria -- for example, holding a minimum token balance -- in order to post.

Source code: github.com/bitsocialnet/evm-contract-call

Requirements

• Node.js >= 22
• ESM-only -- this package does not ship CommonJS builds.

Installation

npm install @bitsocial/evm-contract-challenge

Configuration Options

Option	Type	Description
chainTicker	string	The chain to query (e.g., eth, matic, avax).
address	string	The smart contract address to call.
abi	string	The ABI fragment for the function being called.
condition	string	A comparison expression evaluated against the contract return value (e.g., > 1000).
error	string	The error message shown to authors who do not meet the condition.

Example

A community owner who wants to restrict posting to authors holding more than 1,000 of a particular ERC-20 token would configure the challenge with:

• chainTicker: "eth"
• address: the token contract address
• abi: the ABI for balanceOf(address)
• condition: "> 1000"
• error: "You must hold more than 1,000 tokens to post in this community."

When an author attempts to publish, the challenge calls balanceOf with the author's address and checks whether the returned value satisfies the condition. If it does, the publication proceeds; otherwise, the configured error message is returned.

When to Use It

EVM Contract Call Challenge is ideal for:

• Token-gated communities that restrict posting to token holders.
• NFT-gated access where ownership of a specific NFT is required.
• DAO governance spaces where participation is limited to governance token holders.

For communities that do not rely on on-chain identity, consider Spam Blocker or Voucher Challenge instead.