Simulation

Simulate Flare environment

Simulate chain and Flare System

Using the repository flare-smart-contracts-v2 found here one can deploy all the Fast Updates contracts together with the whole Flare system and voter repository. Navigate to the repository and run

yarn install
yarn compile
yarn sim-node # in first terminal
yarn sim-run # in second terminal

This will start a Flare system on a local Hardhat node, register 4 data providers and start a simulation of FTSO v2 feed providers.

Extract from the logs of the above simulation the value firstVotingEpochStartSec that is needed to configure FDC client. Put this value in the config file configs/systemConfigs/200/hardhat_test.toml

[timing]
t0 = 1722567915 # to be replaced by the firstVotingEpochStartSec

Run indexer and database

Using the repository flare-system-c-chain-indexer found here run an indexer of the hardhat chain used in the simulation. The process is Dockerized. First deploy a database by navigating in docker/test of this repository and run

docker compose up indexer-db

and then run

docker compose up indexer

in the same directory.

FDC client in simulated environment

Run a FDC client to participate in this simulation:

go run main/main.go --config tests/configs/simulationConfig.toml

Simulate participants submitting requests, other data providers, and a verification server

Finally run

go run tests/simulation/simulation_mock.go --config tests/configs/simulationConfig.toml

to simulate:

• a user submitting a request on chain to be verified every round,
• other data providers providing inputs,
• a simple verification server that returns a hardcoded confirmation,
• a system client querying the FDC server to provide data to be submitted on the blockchain.

The FDC client should be responding to the above actions.

TODO: Currently the simulation is rather static in the sense that the every round, at the same time a request is sent, that is always confirmed by all the providers. Make the simulation more dynamic.