51 lines
1.3 KiB
Solidity
51 lines
1.3 KiB
Solidity
pragma solidity ^0.5.0;
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import "../GSN/Context.sol";
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/**
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* @dev A Secondary contract can only be used by its primary account (the one that created it).
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*/
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contract Secondary is Context {
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address private _primary;
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/**
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* @dev Emitted when the primary contract changes.
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*/
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event PrimaryTransferred(
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address recipient
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);
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/**
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* @dev Sets the primary account to the one that is creating the Secondary contract.
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*/
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constructor () internal {
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address msgSender = _msgSender();
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_primary = msgSender;
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emit PrimaryTransferred(msgSender);
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}
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/**
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* @dev Reverts if called from any account other than the primary.
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*/
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modifier onlyPrimary() {
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require(_msgSender() == _primary, "Secondary: caller is not the primary account");
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_;
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}
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/**
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* @return the address of the primary.
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*/
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function primary() public view returns (address) {
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return _primary;
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}
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/**
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* @dev Transfers contract to a new primary.
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* @param recipient The address of new primary.
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*/
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function transferPrimary(address recipient) public onlyPrimary {
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require(recipient != address(0), "Secondary: new primary is the zero address");
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_primary = recipient;
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emit PrimaryTransferred(recipient);
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}
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}
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