Added DAP Adapter and DAO voting tests

Author: tenthirtyone

EIPS/DAR-vote-weight.md

@@ -13,12 +13,15 @@
 ##  Summary
 Not all NFTs are created equal. Nothing exists to distinguish one NFT from another. Weight allows a DAO or other external actors to recognize some value for unique asset holdings.
 
-## Rationale
+## Motivation
 This allows DAOs to form based on asset/NFT holdings instead of just ERC-20 token holdings. Asset holders may decide how to set their token weight.
 
 ## Specification
 The Weighted Digital Asset Registry is an extension for ERC-821 that tracks asset weight. This follows the standard set in [ERC821](https://github.com/ethereum/EIPs/issues/821) and adds:
 
+## Weighted DAR
+Extension to ERC-821
+
 #### totalWeight
 `function totalWeight() public view returns (uint256);`
 Returns the total weight tracked by the DAR
@@ -52,9 +55,24 @@ event ChangeWeight(
     uint64 weight
   );
 ```
+
+## DAR Adapter
+An adapter that exposes a `balanceOf`.
+
+#### voteWeightAddress
+`function voteWeightAddress() public view returns (address);`
+Returns the address of the Weighted DAR.
+
+#### balanceOf
+`function balanceOf(address holder) public view returns  (uint256);`
+Calls the `weightOfHolder` function of the Weighted DAR.
+
 ## Implementation
 
-[Weighted Digital Asset Registry](https://github.com/I-Gave/erc821/tree/weighted-registry/contracts)
+[Weighted Digital Asset Registry](https://github.com/I-Gave/erc821/tree/weighted-registry/contracts) - w/ DAO voting
+
+## Rationale
+Including an adapter for the DAO to reference holder weight minimizes the impact on current DAO code that references an ERC-20's `balancneOf`
 
 ## Copyright
 Copyright and related rights waived via [CC0](https://creativecommons.org/publicdomain/zero/1.0/).