MU07 - Chainlink Relayers

[chapati23]

MU07 Overview

1. Deploy ChainlinkRelayerFactory proxied with a ProxyAdmin owned by Mento Labs multisig.
2. Deploy ChainlinkRelayer instances for two rate feeds: relayed:CELOPHP and relayed:PHPUSD.
3. Submit a Celo Governance Proposal that:
   • Whitelists the relayers for the two rate feeds.
   • Sets the relayed:CELOPHP as the "equivalent token" for the PSO token address. Meaning that when paying with gas, the blockchain node will use the relayed:CELOPHP rate feed when gas is payed in the PSO token.

Testing / development helpers

In order to have as close a structure as possible on testnets, this PR also deploys a few MockChainlinkAggregator contracts:

• PHPUSD to Alfjores
• PHPUSD to Baklava
• CELOUSD to Baklava

Using these on Alfajores we have:

• relayed:CELOPHP built from chainlink's own testnet aggregator of CELOUSD and our mock aggregator of PHPUSD
• relayed:PHPUSD built from our mock aggregator of PHPUSD

And on Baklava we have everything based only on our mock aggregators.

Scripts to interact with relayers:

RelayerStatus

$ yarn script:dev -n alfajores -s RelayerStatus

Get a status output for all defined relayers:

  ====== CELO/PHP (CELO/USD:USD/PHP) =======
  RateFeedID: 0xaFc02368A174Cd08e01c373de6D0B537CECF43C8
  Num rates: 1
  Median rate: 25850491393557810218000000
  ====== PHP/USD =======
  RateFeedID: 0xab921d6ab1057601A9ae19879b111fC381a2a8E9
  Num rates: 1
  Median rate: 17540930000000000000000

RelayerReport

$ yarn script:dev -n alfajores -s RelayerReport

Trigger report on all relayers.

Relayed CELO/PHP (CELO/USD:USD/PHP) successfully.
Relayed PHP/USD successfully.

UpdateMockChainlinkAggregators

$ yarn script:dev -n alfajores -s UpdateMockChainlinkAggregators

Update the mock aggregators on testnets with values from the mainnet aggregators that they mirror.

Other Changes

• Removed the forge_script helper functions because it got out of hand and it was only used in a couple of places
• Improved the verify:celoscan command to check ABIs on celoscan first, and skip verification.

Related Issues

• https://github.com/mento-protocol/mento-general/issues/459

[bowd]

I tried running the proposal on Baklava but it seams that the cLabs contracts team have also abandoned Baklava and SortedOracles is not up to date with the equivalent token implementation :(

[chapati23]

one last typo, then good to go from my side

[nvtaveras]

address looks correct, but maybe get it from contracts.dependency("MentoLabsMultisig") ?

[chapati23]

Merging currently blocked until this is merged celo-org/governance#472