Update: The Road to Multi-Collateral Dai—Kovan Release v0.2.3

10 April 2019


Two weeks ago, we announced the release of MCD v0.2.2 on the Kovan testnet. The release was met with great response from the community! Thank you to everyone who tested and provided feedback.

As promised in the announcement, updates will be posted here as we continue testnet releases on our road to the mainnet release of the Multi-Collateral Dai core contracts and their interaction with Maker core products and tools. As we progress, our goal is to be as transparent as possible with the community and consistently clarify the scope of releases.

This post provides an update on the second release, MCD v0.2.3, the details of which include development updates to the following areas: 

Descriptive Changelog (v0.2.2 <> v0.2.3) 


Since the v0.2.2 Kovan release, the following has been changed and/or added for the newest 0.2.3 release:



The following projects have been updated to use the new Kovan deployment: 

New Contract Addresses and Contract Changes 

For the v0.2.3 release, we have re-released the collateral and MKR tokens. This means that if you are looking to test and experiment with product UIs, you will need to get the newest versions of the collateral and MKR tokens.

Core System Contracts

Contract NameDescriptionContract Address
MCD_VATThe CDP core engine keeps track of DAI credit system accounting. 0xacdd1ee0f74954ed8f0ac581b081b7b86bd6aad9
MCD_CATThe user-facing gateway contract for liquidating (biting) CDPs.0x81f7aa9c1570de564eb511b3a1e57dae558c65b5
MCD_FLAPThe flap auction contract is responsible for buying and burning MKR when the system has a surplus.0xb6e31ab6ea62be7c530c32daea96e84d92fe20b7
MCD_FLOPThe flop auction contract is responsible for minting and selling MKR to cover bad debt.0x275ec1950d6406e3ce6156f9f529c047ea41c8ce

MKR Governance Token Contract

Contract Name DescriptionContract Address
MCD_GOVThe MKR governance token contract.0xd237d1f674c2232cef8fdc7148a59d576b67a8a3

DAI Stablecoin Contracts

Contract NameDescriptionContract Name
MCD_DAIThe DAI stablecoin contract.0xc7cc3413f169a027dccfeffe5208ca4f38ef0c40
MCD_JOIN_DAIThe DAI adapter is responsible for minting and burning DAI.0x7bb403aae0330f1acaad8f2a06ebe4b4e4784418

ETH Collateral Contracts

Contract NameDescriptionContract Address
MCD_JOIN_ETH_AThe ETH adapter is responsible for joining and exiting ETH collateral.
MCD_FLIP_ETH_AThe ETH flip auction contract is responsible for selling off ETH collateral for DAI when a CDP is liquidated.

Collateral 1 Contracts

Contract NameDescriptionContract Address
COL1Collateral 1 token contract.
MCD_JOIN_COL1_AThe COL1 adapter is responsible for joining and exiting COL1 collateral.
MCD_FLIP_COL1_AThe COL1 flip auction contract is responsible for selling off COL1 collateral for DAI when a CDP is liquidated 0x6e8032435c84b08e30f27bfbb812ee365a095b31

To access the full list of contracts, please go here

Key Smart Contract Functionality Changes 

To see the details of the changes, please visit the release of the newest  testchain-dss-deployment-scripts

The Most Significant Changes in the Release

Please note that the `mcd-cli` is out of date and, therefore, is not part of this release.

User Interface Changes

Governance Dashboard

Release Details

CDP Portal 

Release Details


Release Details

Next Steps

We are now another step closer to achieving Multi-Collateral Dai! When building a system like this, it is crucial to get feedback—not just from internal teams, but also from the entire Maker ecosystem. Please join our public #product-feedback channel on Rocket.Chat to provide feedback and ask any questions you may have.

You can also provide product feedback on the CDP Portal using Usersnap. You do not have to install a Chrome extension to do so. The Usersnap widget allows you to make comments right away.

Getting MakerDAO Updates

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10 April 2019