IMPLEMENTASI SMART CONTRACT BERBASIS BLOCKCHAIN PADA JARINGAN POLYGON UNTUK PENERBITAN DAN VERIFIKASI SERTIFIKAT

Certificates, crucial documents for proof of competence or ownership, are highly susceptible to forgery and inefficiencies within traditional systems. This research implements blockchain-based smart contracts on the Polygon network to address these challenges, offering a secure, transparent, and decentralized solution for digital certificate issuance and verification. Utilizing a prototyping methodology in Decentralized Application (DApp) development, functional testing revealed all features operated as expected, including the detection of modified certificates. Step- by-step integrity testing demonstrated the system's ability to verify original certificates, detect modified/forged certificates, and identify unregistered ones, confirming the system's anti-forgery capability. Performance testing on the Polygon mainnet indicated that certificate issuance had an average response time of 16.6 seconds with an average gas fee of 0.009826933 MATIC. Meanwhile, certificate verification was remarkably fast with an average response time of 6.12 seconds and incurred no gas fee, both achieving a 100% success rate. Smart contract testing further confirmed that the contract functioned as intended, successfully processing valid issuances while effectively rejecting unauthorized transactions. Thus, this implementation successfully presents an innovative solution for digital certificate management founded on security, transparency, and decentralization, effectively minimizing forgery risks and demonstrating good performance.
Keywords: Blockchain, Polygon, Smart Contract, Digital Certificate, DApp, IPFS, Verification.