☢️Orand: Decentralized Random Number Generator

Orand is a component of Orochi Computation Layer that will be the source of trustless randomness. It provides randomness for Orochi Computation Layer and all supported blockchains.

Problem

• There is no trustless source of randomness, even the advanced approach like drand

• The cost is overwhelming to feeding and verify a randomness

• There is no penalty for malfunction participants and colluding parties

• Most of distributed RNG is built with the fail-stop mechanism it's also no penalty to withholding secret

• Randomness values aren't accessible during the runtime

Orand

A Decentralized Random Number Generator by Orochi Network. Allowed randomness to be generated and fed to any smart contracts on EVM compatible blockchains.

Orand v1.0 is providing:

Verifiable randomness: We're using Verifiable Random Function (VRF) to generate randomness the process described here https://www.rfc-editor.org/rfc/rfc6979. Curve secp256k1 was used to minimizing verification cost for smart contract.

Depersity: A distributed system with many participants/nodes will join to generate randomness by using Multi Party Computation (MPC)

Unpredictability: A VRF will perform with the input is previous randomness and it’s also require half of participants to participate in MPC

High throughput: Game server could request randomness from the Orand system. The result will be provided as soon as half of participants participate in the MPC.

Cheap and secure randomness: For the free tier, randomnesses will be given freely for the first 20,000 randomnesses every month.

Fault Proof: If the game server tries to delay the feeding process to manipulate the result, a fault proof will be committed so sue the game server.

Multi-chain: All EVM compatible blockchains can be supported

Architecture

All components will be implemented as a module and this approach help other project to reuse our source code.