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53// add to your stake & reset counters - allow amount == 0, so you can reset timers without having to add tokens to your stake
54function addToStake(uint256 amount, address addr) external onlyStakingLogicContract {
55    require(amount >= 0, "RadarStake: Amount has to be 0 or higher");
56    require(addr != address(0), "RadarStake: Cannot use the null address");
57    require(allAprs.length > 0, "RadarStake: No APR set");
58
59    // storage variable used multiple times thus storing it into memory and using the new one from now on
60    uint256 _totalStaked = totalStaked;
61
62    Stake memory myStake = _stakedTokens[addr];
63    if (myStake.totalStaked > 0 && _totalStaked >= myStake.totalStaked) {
64        // subtract the current stake from the total counter (memory)
65        _totalStaked -= myStake.totalStaked;
66    }
67
68    // save new Stake
69    _stakedTokens[addr] = Stake({
70        totalStaked: myStake.totalStaked + amount,
71        lastStakedTimestamp: block.timestamp,
72        cooldownSeconds: 0, // reset cooldown timer
73        cooldownTriggeredAtTimestamp: 0 // reset cooldown timer
74    });
75
76    // add to total staked amount (memory)
77    _totalStaked += myStake.totalStaked + amount;
78    // store this variable back to storage
79    totalStaked = _totalStaked;
80
81    emit AddedToStake(addr, amount);
82}

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156// if someone sends RADAR to this contract by accident we want to be able to send it back to them
157function withdrawRewardTokens(address to, uint256 amount) external onlyOwner {
158    require(to != address(0), "RadarStake: Cannot use the null address");
159    require(amount >= 0, "RadarStake: Amount cannot be lower than 0");
160    uint256 radarBalance = radarTokenContract.balanceOf(address(this));
161    require(radarBalance >= amount, "RadarStake: Cannot withdraw more than is available");
162    require(radarBalance - amount >= totalStaked, "RadarStake: Cannot withdraw more than is staked");
163    
164    // approve this contract to move the amount of tokens
165    radarTokenContract.approve(address(this), amount);
166    // transfer those tokens to the given address
167    radarTokenContract.transferFrom(address(this), to, amount);
168}

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106require(myStake.totalStaked >= amount, "RadarStake: You cannot unstake more than you have staked");
107require(totalStaked >= amount, "RadarStake: Cannot unstake more than is staked in total");
108
109if (myStake.totalStaked == amount) {
110    // clean memory when the whole stake is being taken out
111    delete(_stakedTokens[addr]);
112} else {
113    myStake.totalStaked = myStake.totalStaked - amount;
114    // store the updated Stake to permantent storage
115    _stakedTokens[addr] = myStake;
116}

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111delete(_stakedTokens[addr]);

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13constructor(address radarTokenContractAddr) {
14    radarTokenContract = iRadarToken(radarTokenContractAddr);
15}