Proxy Module
Allowing Users to interact with the ABM Protocol more easily
- Module Name: Proxy Module
- Type/Category: Proxy —> DsrManager.sol, DssCdpManager.sol, VoteProxy.sol & DssProxyActions.sol
- Source code:
The Proxy module was created in order to make it more convenient for users/developers to interact with the ABM Protocol. It contains contract interfaces, proxies, and aliases to functions necessary for both DSR and Vault management and ABM governance.

The
DsrManager
provides an easy to use smart contract that allows service providers to deposit/withdraw dotBTC into the contract pot, to start earning the dotBTC Saving Rate on a pool of dotBTC in a single function call without the need of a ds-proxy
contract. This is useful for smart contracts integrating DSR functionality. The
DssCdpManager
(aka manager
) was created to enable a formalized process for Vaults to be transferred between owners. In short, the manager
works by having a dss
wrapper that allows users to interact with their Vaults in an easy way, treating them as non-fungible tokens (NFTs).The VoteProxy facilitates online voting with offline ABM storage. By having a VoteProxy, this allows users to have a linked hot wallet that can pull and push ABM from the proxy’s corresponding cold wallet and to DS-Chief, where voting can take place with the online hot wallet.
There are two main reasons to have/use this contract:
- 1.To support two different voting mechanisms
- 2.To minimize the time that ABM owners need to have their wallet online.
The
dss-proxy-actions
was designed to be used by the Ds-Proxy, which is owned individually by users to interact more easily with the ABM Protocol. Note that it is not intended to be used directly (this will be covered later). The dss-proxy-actions contract was developed to serve as a library for user's ds-proxies.In general, the ds proxy receives two parameters:
- Proxy library address
- In this case, the dss proxy actions library.
- Call data
- Functions and parameters you want to execute.
- DSR Manager
- For developers who want to integrate with
DsrManager
, it is important to realize that user balances in thepot
will be owned by theDsrManager
, which has an internal mapping to determine user balances. Consequently the deposited dotBTC in DSR might not show up in solutions that are based onds-proxy
- CDP Manager
- For the developers who want to integrate with the
manager
, they will need to understand that the Vault actions are still in theurn
environment. Regardless of this, themanager
tries to abstract theurn
usage by aCDPId
. This means that developers will need to get theurn
(urn = manager.urns(cdpId)
) to allow thejoin
ing of collateral to that Vault.
- Vote Proxy
- One-time proxy setup cost: As a new proxy contract user, you will need to set it up before you can use it for future voting. The price of the setup will depend on the current Ethereum gas price but will ultimately make voting easier and safer for users.
- Proxy Actions
- Using dss-proxy-actions directly can result in the loss of control over your Vault: If you open a new Vault via the dss proxy actions (centralized) without a ds proxy you would be creating a Vault that is owned by the dss proxy actions that anyone could call publicly. It would be owned by the dss proxy actions contact and anyone could execute actions on your Vault. Therefore, if you use the dss proxy actions directly it can be quite risky.
- CDP Manager
- Potential Issues around Chain Reorganization
- When
open
is executed, a newurn
is created and acdpId
is assigned to it for a specificowner
. If the user usesjoin
to add collateral to theurn
immediately after the transaction is mined, there is a chance that a reorganization of the chain occurs. This would result in the user losing the ownership of thatcdpId
/urn
pair, therefore losing their collateral. However, this issue can only arise when avoiding the use of the proxy functions via a profile proxy as the user willopen
thecdp
andjoin
collateral in the same transaction.
- Vote Proxy
- The loss of private keys for both the hot and cold wallet will prevent you from voting.
- Proxy Actions
- Ds proxy is a general purpose proxy / there is always a risk when using a proxy
- In terms of failure modes, this means you can execute a malicious proxy action as well as a direct action that could potentially send your ETH to a random address. To be extra cautious, you should check your wallets call data and/or audit what your wallet does as they could potentially present users with some unwanted random call data and execute unwanted actions.
Last modified 2yr ago