Contract 0x314159265dd8dbb310642f98f50c066173c1259b

/**
 *Submitted for verification at Etherscan.io on 2019-10-31
*/

;;; --------------------------------------------------------------------------- 
;;; @title The Ethereum Name Service registry. 
;;; @author Daniel Ellison <[email protected]> 
 
(seq 
 
  ;; -------------------------------------------------------------------------- 
  ;; Constant definitions. 
 
  ;; Memory layout. 
  (def 'node-bytes  0x00) 
  (def 'label-bytes 0x20) 
  (def 'call-result 0x40) 
 
  ;; Struct: Record 
  (def 'resolver 0x00) ; address 
  (def 'owner    0x20) ; address 
  (def 'ttl      0x40) ; uint64 
 
  ;; Precomputed function IDs. 
  (def 'get-node-owner    0x02571be3) ; owner(bytes32) 
  (def 'get-node-resolver 0x0178b8bf) ; resolver(bytes32) 
  (def 'get-node-ttl      0x16a25cbd) ; ttl(bytes32) 
  (def 'set-node-owner    0x5b0fc9c3) ; setOwner(bytes32,address) 
  (def 'set-subnode-owner 0x06ab5923) ; setSubnodeOwner(bytes32,bytes32,address) 
  (def 'set-node-resolver 0x1896f70a) ; setResolver(bytes32,address) 
  (def 'set-node-ttl      0x14ab9038) ; setTTL(bytes32,uint64) 
 
  ;; Jumping here causes an EVM error. 
  (def 'invalid-location 0x02) 
 
  ;; -------------------------------------------------------------------------- 
  ;; @notice Shifts the leftmost 4 bytes of a 32-byte number right by 28 bytes. 
  ;; @param input A 32-byte number. 
 
  (def 'shift-right (input) 
    (div input (exp 2 224))) 
 
  ;; -------------------------------------------------------------------------- 
  ;; @notice Determines whether the supplied function ID matches a known 
  ;;         function hash and executes <code-body> if so. 
  ;; @dev The function ID is in the leftmost four bytes of the call data. 
  ;; @param function-hash The four-byte hash of a known function signature. 
  ;; @param code-body The code to run in the case of a match. 
 
  (def 'function (function-hash code-body) 
    (when (= (shift-right (calldataload 0x00)) function-hash) 
      code-body)) 
 
  ;; -------------------------------------------------------------------------- 
  ;; @notice Calculates record location for the node and label passed in. 
  ;; @param node The parent node. 
  ;; @param label The hash of the subnode label. 
 
  (def 'get-record (node label) 
    (seq 
      (mstore node-bytes node) 
      (mstore label-bytes label) 
      (sha3 node-bytes 64))) 
 
  ;; -------------------------------------------------------------------------- 
  ;; @notice Retrieves owner from node record. 
  ;; @param node Get owner of this node. 
 
  (def 'get-owner (node) 
    (sload (+ node owner))) 
 
  ;; -------------------------------------------------------------------------- 
  ;; @notice Stores new owner in node record. 
  ;; @param node Set owner of this node. 
  ;; @param new-owner New owner of this node. 
 
  (def 'set-owner (node new-owner) 
    (sstore (+ node owner) new-owner)) 
 
  ;; -------------------------------------------------------------------------- 
  ;; @notice Stores new subnode owner in node record. 
  ;; @param node Set owner of this node. 
  ;; @param label The hash of the label specifying the subnode. 
  ;; @param new-owner New owner of the subnode. 
 
  (def 'set-subowner (node label new-owner) 
    (sstore (+ (get-record node label) owner) new-owner)) 
 
  ;; -------------------------------------------------------------------------- 
  ;; @notice Retrieves resolver from node record. 
  ;; @param node Get resolver of this node. 
 
  (def 'get-resolver (node) 
    (sload node)) 
 
  ;; -------------------------------------------------------------------------- 
  ;; @notice Stores new resolver in node record. 
  ;; @param node Set resolver of this node. 
  ;; @param new-resolver New resolver for this node. 
 
  (def 'set-resolver (node new-resolver) 
    (sstore node new-resolver)) 
 
  ;; -------------------------------------------------------------------------- 
  ;; @notice Retrieves TTL From node record. 
  ;; @param node Get TTL of this node. 
 
  (def 'get-ttl (node) 
    (sload (+ node ttl))) 
 
  ;; -------------------------------------------------------------------------- 
  ;; @notice Stores new TTL in node record. 
  ;; @param node Set TTL of this node. 
  ;; @param new-resolver New TTL for this node. 
 
  (def 'set-ttl (node new-ttl) 
    (sstore (+ node ttl) new-ttl)) 
 
  ;; -------------------------------------------------------------------------- 
  ;; @notice Checks that the caller is the node owner. 
  ;; @param node Check owner of this node. 
 
  (def 'only-node-owner (node) 
    (when (!= (caller) (get-owner node)) 
      (jump invalid-location))) 
 
  ;; -------------------------------------------------------------------------- 
  ;; INIT 
 
  ;; Set the owner of the root node (0x00) to the deploying account. 
  (set-owner 0x00 (caller)) 
 
  ;; -------------------------------------------------------------------------- 
  ;; CODE 
 
  (returnlll 
    (seq 
 
      ;; ---------------------------------------------------------------------- 
      ;; @notice Returns the address of the resolver for the specified node. 
      ;; @dev Signature: resolver(bytes32) 
      ;; @param node Return this node's resolver. 
      ;; @return The associated resolver. 
 
      (def 'node (calldataload 0x04)) 
 
      (function get-node-resolver 
        (seq 
 
          ;; Get the node's resolver and save it. 
          (mstore call-result (get-resolver node)) 
 
          ;; Return result. 
          (return call-result 32))) 
 
      ;; ---------------------------------------------------------------------- 
      ;; @notice Returns the address that owns the specified node. 
      ;; @dev Signature: owner(bytes32) 
      ;; @param node Return this node's owner. 
      ;; @return The associated address. 
 
      (def 'node (calldataload 0x04)) 
 
      (function get-node-owner 
        (seq 
 
          ;; Get the node's owner and save it. 
          (mstore call-result (get-owner node)) 
 
          ;; Return result. 
          (return call-result 32))) 
 
      ;; ---------------------------------------------------------------------- 
      ;; @notice Returns the TTL of a node and any records associated with it. 
      ;; @dev Signature: ttl(bytes32) 
      ;; @param node Return this node's TTL. 
      ;; @return The node's TTL. 
 
      (def 'node (calldataload 0x04)) 
 
      (function get-node-ttl 
        (seq 
 
          ;; Get the node's TTL and save it. 
          (mstore call-result (get-ttl node)) 
 
          ;; Return result. 
          (return call-result 32))) 
 
      ;; ---------------------------------------------------------------------- 
      ;; @notice Transfers ownership of a node to a new address. May only be 
      ;;         called by the current owner of the node. 
      ;; @dev Signature: setOwner(bytes32,address) 
      ;; @param node The node to transfer ownership of. 
      ;; @param new-owner The address of the new owner. 
 
      (def 'node (calldataload 0x04)) 
      (def 'new-owner (calldataload 0x24)) 
 
      (function set-node-owner 
        (seq (only-node-owner node) 
 
          ;; Transfer ownership by storing passed-in address. 
          (set-owner node new-owner) 
 
          ;; Emit an event about the transfer. 
          ;; Transfer(bytes32 indexed node, address owner); 
          (mstore call-result new-owner) 
          (log2 call-result 32 
              (sha3 0x00 (lit 0x00 "Transfer(bytes32,address)")) node) 
 
          ;; Nothing to return. 
          (stop))) 
 
      ;; ---------------------------------------------------------------------- 
      ;; @notice Transfers ownership of a subnode to a new address. May only be 
      ;;         called by the owner of the parent node. 
      ;; @dev Signature: setSubnodeOwner(bytes32,bytes32,address) 
      ;; @param node The parent node. 
      ;; @param label The hash of the label specifying the subnode. 
      ;; @param new-owner The address of the new owner. 
 
      (def 'node (calldataload 0x04)) 
      (def 'label (calldataload 0x24)) 
      (def 'new-owner (calldataload 0x44)) 
 
      (function set-subnode-owner 
        (seq (only-node-owner node) 
 
          ;; Transfer ownership by storing passed-in address. 
          (set-subowner node label new-owner) 
 
          ;; Emit an event about the transfer. 
          ;; NewOwner(bytes32 indexed node, bytes32 indexed label, address owner); 
          (mstore call-result new-owner) 
          (log3 call-result 32 
              (sha3 0x00 (lit 0x00 "NewOwner(bytes32,bytes32,address)")) 
              node label) 
 
          ;; Nothing to return. 
          (stop))) 
 
      ;; ---------------------------------------------------------------------- 
      ;; @notice Sets the resolver address for the specified node. 
      ;; @dev Signature: setResolver(bytes32,address) 
      ;; @param node The node to update. 
      ;; @param new-resolver The address of the resolver. 
 
      (def 'node (calldataload 0x04)) 
      (def 'new-resolver (calldataload 0x24)) 
 
      (function set-node-resolver 
        (seq (only-node-owner node) 
 
          ;; Transfer ownership by storing passed-in address. 
          (set-resolver node new-resolver) 
 
          ;; Emit an event about the change of resolver. 
          ;; NewResolver(bytes32 indexed node, address resolver); 
          (mstore call-result new-resolver) 
          (log2 call-result 32 
              (sha3 0x00 (lit 0x00 "NewResolver(bytes32,address)")) node) 
 
          ;; Nothing to return. 
          (stop))) 
 
      ;; ---------------------------------------------------------------------- 
      ;; @notice Sets the TTL for the specified node. 
      ;; @dev Signature: setTTL(bytes32,uint64) 
      ;; @param node The node to update. 
      ;; @param ttl The TTL in seconds. 
 
      (def 'node (calldataload 0x04)) 
      (def 'new-ttl (calldataload 0x24)) 
 
      (function set-node-ttl 
        (seq (only-node-owner node) 
 
          ;; Set new TTL by storing passed-in time. 
          (set-ttl node new-ttl) 
 
          ;; Emit an event about the change of TTL. 
          ;; NewTTL(bytes32 indexed node, uint64 ttl); 
          (mstore call-result new-ttl) 
          (log2 call-result 32 
              (sha3 0x00 (lit 0x00 "NewTTL(bytes32,uint64)")) node) 
 
          ;; Nothing to return. 
          (stop))) 
 
      ;; ---------------------------------------------------------------------- 
      ;; @notice Fallback: No functions matched the function ID provided. 
 
      (jump invalid-location))) 
 
)

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