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Feed.sol
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Feed.sol
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pragma solidity ^0.5.0;
import "../modules/EventMetadata.sol";
import "../modules/Operated.sol";
import "../modules/Template.sol";
import "../modules/ProofHashes.sol";
import "../modules/MultiHashWrapper.sol";
contract Feed is ProofHashes, MultiHashWrapper, Operated, EventMetadata, Template {
event Initialized(address operator, bytes multihash, bytes metadata);
function initialize(
address operator,
bytes memory multihash,
bytes memory metadata
) public initializeTemplate() {
// set operator
if (operator != address(0)) {
Operated._setOperator(operator);
Operated._activateOperator();
}
// add multihash to storage
if (multihash.length != 0) {
// unpack multihash
MultiHashWrapper.MultiHash memory multihashObj = MultiHashWrapper._splitMultiHash(multihash);
// set multihash format
ProofHashes._setMultiHashFormat(multihashObj.hashFunction, multihashObj.digestSize);
// submit hash
ProofHashes._submitHash(multihashObj.hash);
}
// set metadata
if (metadata.length != 0) {
EventMetadata._setMetadata(metadata);
}
// log initialization params
emit Initialized(operator, multihash, metadata);
}
// state functions
function submitHash(bytes32 multihash) public {
// only active operator or creator
require(Template.isCreator(msg.sender) || Operated.isActiveOperator(msg.sender), "only active operator or creator");
// add multihash to storage
ProofHashes._submitHash(multihash);
}
function setMetadata(bytes memory metadata) public {
// only active operator or creator
require(Template.isCreator(msg.sender) || Operated.isActiveOperator(msg.sender), "only active operator or creator");
// set metadata
EventMetadata._setMetadata(metadata);
}
function transferOperator(address operator) public {
// restrict access
require(Operated.isActiveOperator(msg.sender), "only active operator");
// transfer operator
Operated._transferOperator(operator);
}
function renounceOperator() public {
// restrict access
require(Operated.isActiveOperator(msg.sender), "only active operator");
// transfer operator
Operated._renounceOperator();
}
}