54 lines
1.5 KiB
Solidity
54 lines
1.5 KiB
Solidity
// contracts/Implementation.sol
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// SPDX-License-Identifier: Apache 2
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pragma solidity ^0.8.0;
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pragma experimental ABIEncoderV2;
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import "./Governance.sol";
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import "@openzeppelin/contracts/proxy/ERC1967/ERC1967Upgrade.sol";
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contract Implementation is Governance {
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event LogMessagePublished(address indexed sender, uint64 sequence, uint32 nonce, bytes payload, uint8 consistencyLevel);
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// Publish a message to be attested by the Wormhole network
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function publishMessage(
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uint32 nonce,
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bytes memory payload,
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uint8 consistencyLevel
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) public payable returns (uint64 sequence) {
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// check fee
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require(msg.value == messageFee(), "invalid fee");
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sequence = useSequence(msg.sender);
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// emit log
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emit LogMessagePublished(msg.sender, sequence, nonce, payload, consistencyLevel);
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}
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function useSequence(address emitter) internal returns (uint64 sequence) {
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sequence = nextSequence(emitter);
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setNextSequence(emitter, sequence + 1);
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}
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function initialize() initializer public virtual {
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// this function needs to be exposed for an upgrade to pass
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}
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modifier initializer() {
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address implementation = ERC1967Upgrade._getImplementation();
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require(
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!isInitialized(implementation),
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"already initialized"
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);
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setInitialized(implementation);
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_;
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}
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fallback() external payable {revert("unsupported");}
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receive() external payable {revert("the Wormhole contract does not accept assets");}
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}
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