Blockchain is a technology that allows storing data in a secure and decentralized way. One of the main reasons why the interest in this technology is growing is because it can provide trust between untrusted parties without the use of a centralized entity. Hyperledger Fabric is a permissioned blockchain project maintained by The Linux Foundation meant for environments in which system performance is a key factor. For instance, HF architecture faces three consecutive phases called Execute, Order and Validate. This behavior differs from other blockchain architecture like Bitcoin in which an Order-Execute-Validate procedure is followed. During the Execution phase, Simulation happens: a proposal of the transaction, called Endorsement request, is sent to specific peers named Endorser peers or EPs.