A SMART CONTRACT SYSTEM FOR SELLING NAPIER GRASS TO BIOMASS POWER PLANT IN PAKAM DISTRICT, BURIRAM PROVINCE

Abstract

This paper aimed to develop the purchasing system of Napier grass from farmers to the existing biomass power plant with smart contract. In this study bases on software development life cycle that are problem definition, user requirement, system analysis and design, testing, and evaluation. The smart contract was written in Hardhat, Node.Js and solidity programming as tools and apply oracle blockchain to import external databases into these systems. The results showed that, the community enterprise would act as a mediator in the purchasing system and provide the Napier grass’ sapling for farmers to grow. In addition to purchase the grown grass from farmers and then selling it to the biomass power plant. The smart contract system run under the Ethereum blockchain by using the USDT (United States Dollar Tether) Stable coin and ERC20 as gas fee to with 100% accurate. It can be concluded that the smart contract is a successful prototype which could be further developed to the platform among biomass power plants, community enterprises and famers for purchasing system of Napier grass. On-going research, the Napier grass moisture level should be done to set the standard prices which are acceptable among biomass power plants, community enterprises and famers in the other provinces.