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create blocksigner.sol #22

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Merged
merged 1 commit into from
Jan 27, 2019
Merged

create blocksigner.sol #22

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24 changes: 24 additions & 0 deletions contracts/blocksigner/contract/blocksigner.sol
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Original file line number Diff line number Diff line change
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pragma solidity ^0.4.21;

import "./libs/SafeMath.sol";

contract BlockSigner {
using SafeMath for uint256;

event Sign(address _signer, uint256 blockNumber);

mapping(uint256 => address[]) blockSigners;

function sign(uint256 _blockNumber) external {
// consensus should validate all senders are validators, gas = 0
require(block.number >= _blockNumber);
require(block.number <= _blockNumber.add(990 * 2));
blockSigners[_blockNumber].push(msg.sender);

emit Sign(msg.sender, _blockNumber);
}

function getSigners(uint256 _blockNumber) public view returns(address[]) {
return blockSigners[_blockNumber];
}
}