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Add getBalancesAndAllowances

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This commit is contained in:
Amir Bandeali
2018-08-21 18:14:22 -07:00
parent 7fa5b474eb
commit 3760eb5baf
2 changed files with 69 additions and 0 deletions
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19
packages/contracts/src/2.0.0/extensions/OrderValidator/OrderValidator.sol vendored
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@@ -158,6 +158,25 @@ contract OrderValidator {
return (balance, allowance);
}
/// @dev Fetches token balances and allowances of an address for each given assetProxy. Supports ERC20 and ERC721.
/// @param target Address to fetch balances and allowances of.
/// @param assetData Array of encoded byte arrays that can be decoded by a specified proxy contract when transferring asset.
/// @return Balances and allowances of assets.
/// For ERC721 tokens, these values will always be 1 or 0.
function getBalancesAndAllowances(address target, bytes[] memory assetData)
public
view
returns (uint256[] memory, uint256[] memory)
{
uint256 length = assetData.length;
uint256[] memory balances = new uint256[](length);
uint256[] memory allowances = new uint256[](length);
for (uint256 i = 0; i != length; i++) {
(balances[i], allowances[i]) = getBalanceAndAllowance(target, assetData[i]);
}
return (balances, allowances);
}
/// @dev Calls `token.ownerOf(tokenId)`, but returns a null owner instead of reverting on an unowned token.
/// @param token Address of ERC721 token.
/// @param tokenId The identifier for the specific NFT.