47 lines
1.1 KiB
Solidity
47 lines
1.1 KiB
Solidity
pragma solidity ^0.5.7;
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/**
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* @title Secondary
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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 {
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address private _primary;
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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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_primary = msg.sender;
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emit PrimaryTransferred(_primary);
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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(msg.sender == _primary);
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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));
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_primary = recipient;
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emit PrimaryTransferred(_primary);
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}
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}
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