Add Digest interface

solidity/AccountsIndexMutable.sol

@@ -0,0 +1,27 @@
+pragma solidity >=0.6.12;
+
+// Author:	Louis Holbrook <dev@holbrook.no> 0826EDA1702D1E87C6E2875121D2E7BB88C2A746
+// SPDX-License-Identifier:	AGPL-3.0-or-later
+// File-version: 1
+
+// Extends the AccountsIndex contract to enable account removal and deactivation.
+
+interface IAccountsIndexMutable {
+	// Active status of address changed, and by whom changed.
+	event AddressActive(address indexed _account, bool _active);
+
+	// Address removed from store, and by whom removed.
+	event AddressRemoved(address _account);
+
+	// Remove an entry from the index. Reduces the entry count.
+	function remove(address) external returns (bool);
+
+	// Deactivate account but keep in index. Does not affect entry count.
+	function deactivate(address) external returns (bool);
+
+	// Activate previously deactivated account. Does not affect entry count.
+	function activate(address) external returns (bool);
+
+	// Check if account exists and is active;
+	function isActive(address) external view returns (bool);
+}

solidity/Chrono.sol

@@ -0,0 +1,11 @@
+pragma solidity >=0.6.12;
+
+// Author:	Louis Holbrook <dev@holbrook.no> 0826EDA1702D1E87C6E2875121D2E7BB88C2A746
+// SPDX-License-Identifier:	AGPL-3.0-or-later
+// File-version: 1
+
+interface IChrono {
+	// Returns the timestamp of when a resource corresponding to _idx was first created.
+	// int64 chosen as return value for simpler interoperability with ERC5007.
+	function createTime(uint256 _idx) external returns(int64);
+}

solidity/Digest.sol

@@ -0,0 +1,23 @@
+pragma solidity >=0.6.12;
+
+// Author:	Louis Holbrook <dev@holbrook.no> 0826EDA1702D1E87C6E2875121D2E7BB88C2A746
+// SPDX-License-Identifier:	AGPL-3.0-or-later
+// File-version: 1
+
+interface IDigest {
+	// Returns the default digest encoding used by the contract instance.
+	function defaultDigestEncoding() external view returns (uint256 _encoding);
+
+	// Check if the given encoding has been implemented in the contract instance.
+	function haveDigestEncoding(uint256 _codec) external view returns(bool);
+
+	// Verify and encode the given digest for a specific hashing algorithm.
+	// Returns a zero-length byte array if digest is invalid.
+	// Must succeed if called with the defaultDigestEncoding and a valid digest.
+	function encodeDigest(bytes memory _data, uint256 _encoding) external view returns (bytes memory);
+
+	// Encodes the digest using the default digest encoding.
+	// Returns a zero-length byte array if digest is invalid.
+	// Must succeed with a valid digest.
+	function encodeDigest(bytes memory _data) external view returns (bytes memory);
+}

solidity/ERC5007.sol

@@ -0,0 +1,15 @@
+pragma solidity >=0.6.12;
+
+// Author:	Louis Holbrook <dev@holbrook.no> 0826EDA1702D1E87C6E2875121D2E7BB88C2A746
+// SPDX-License-Identifier:	AGPL-3.0-or-later
+// File-version: 4
+
+// This is a representation of an officially approved Ethereum Improvement Proposal, written by Anders (@0xanders), Lance (@LanceSnow), Shrug <shrug@emojidao.org>.
+// It was released under the CC0 license.
+// The proposal source used as reference was a Markdown file with the following digest:
+// - sha256:ec5a3d25822e616e032ef27faeb9a7191147a7b18064d95807df20fbc6b69870
+
+interface IERC5007 {
+	function startTime(uint256 tokenId) external view returns (int64);
+	function endTime(uint256 tokenId) external view returns (int64);
+}

solidity/ERC5192.sol

@@ -0,0 +1,17 @@
+pragma solidity >=0.6.12;
+
+// Author:	Louis Holbrook <dev@holbrook.no> 0826EDA1702D1E87C6E2875121D2E7BB88C2A746
+// SPDX-License-Identifier:	AGPL-3.0-or-later
+// File-version: 4
+
+// This is a representation of an officially approved Ethereum Improvement Proposal, written by Tim Daubenschütz (@TimDaub), Anders (@0xanders).
+// It was released under the CC0 license.
+// The proposal source used as reference was a Markdown file with the following digest:
+// - sha256:c746922587ede699bd1560be0c0db5599104a25c976077d20706ec05340b3b7a
+
+interface IERC5192 {
+	event Locked(uint256 tokenId);
+	event Unlocked(uint256 tokenId);
+
+	function locked(uint256 tokenId) external view returns (bool);
+}

solidity/Locator.sol

@@ -2,7 +2,7 @@ pragma solidity >=0.6.12;
 
 // Author:	Louis Holbrook <dev@holbrook.no> 0826EDA1702D1E87C6E2875121D2E7BB88C2A746
 // SPDX-License-Identifier:	AGPL-3.0-or-later
-// File-version: 3
+// File-version: 4
 
 interface ILocator {
 	// URI that may or may not point to a specific resource location.

solidity/MultiHash.sol

@@ -15,8 +15,10 @@ interface IMultiHash {
 	}
 
 	// All registered multicodecs
-	function multiCodec(uint256 _codec) external view returns(MultiHash memory);
+	function digestCodec(uint256 _codec) external view returns(MultiHash memory);
+
+	function haveDigestEncoding(uint256 _codec) external view returns(bool);
 
 	// Generate a multihash from the given digest and current selected multicodec
-	function toMultiHash(uint256 _codec, bytes memory _digest) external view returns(bytes memory);
+	function encodeDigest(uint256 _codec, bytes memory _digest) external view returns(bytes memory);
 }