On-Chain Diploma Credential Issuer

WHAT IT DOES

This tool provides on-chain issuance and management of diploma credentials, enabling educational institutions to issue verifiable digital diplomas. It reads your connected wallet address, credential contract address, student address, diploma data (name, institution, degree, graduation date), issuance timestamp, current block timestamp, credential status, and verification status. You can then sign and send transactions to issue diploma credentials to one or multiple students in batch, revoke existing credentials, verify credential authenticity, and record issuance metadata on-chain. All diploma parameters are displayed in a clear review panel before you sign, so you know exactly what you are issuing. The tool also logs transaction hashes, confirmation status, and gas costs, providing a complete audit trail of all credential activities.

HOW TO USE

Connect your wallet using the built-in wallet bridge, choose the network that matches your credential contract, and paste the credential contract address. Enter the student addresses as a comma-separated list, the student name, institution, degree, and graduation date. The review panel shows all inputs, the current sender contract fee, and the credential contract owner before you sign. Use the numbered action buttons: issue diplomas to issue credentials to all listed students in a single batch transaction; revoke diplomas to revoke credentials from listed students; or verify diploma to check the authenticity and status of a student's credential. You can also check status to view current credential contract owner and state. Each transaction is signed sequentially, and the tool displays transaction details and confirmation status.

THE REAL MECHANISM

This tool uses ethers.js v5.7.2 to build and send transactions through the wallet's signer. The credential contract address is not hardcoded – you paste the contract you are using, so you are in full control. The tool reads the live fee from the shared sender contract before every transaction, ensuring that the fee is always current and not hardcoded. When you issue diplomas, the tool constructs a contract call to the issueDiplomas function, which accepts an array of student addresses and diploma data (name, institution, degree, graduation date), issuing credentials to all students in a single batch transaction. When you revoke diplomas, the tool calls revokeDiplomas with an array of addresses. When you verify a diploma, the tool calls verifyDiploma to check if the credential is active and authentic. The tool reads credential state via the getDiploma view function. All transactions are sequential to prevent nonce conflicts, and gas costs are calculated using effectiveGasPrice for accurate post-EIP-1559 reporting.

WHAT IT CANNOT SEE

This tool cannot verify off-chain academic records, validate student identity, detect credential fraud, or ensure that the credential contract handles issuance correctly. It cannot detect if the student actually earned the diploma or if the academic records are accurate. The tool also cannot verify that the credential contract correctly handles edge cases like duplicate issuance, revoked credentials, or verification failures. It cannot simulate the outcome of a transaction before you sign it, nor can it guarantee that the credential will be issued correctly if the contract is not properly implemented.

PLEASE NOTE

This tool works only on EVM-compatible chains supported by your wallet and provider. Always double-check the contract addresses and parameters before signing. Use testnet first. The tool is a transaction-signing interface and credential management tool, not a academic record verification or identity validation system.