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Added native token top-up and withdraw functionality in VRFv2PlusSubscriptionManager contract. #2123

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Added native token top-up and withdraw functionality in VRFv2PlusSubscriptionManager contract. #2123

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25 changes: 25 additions & 0 deletions public/samples/VRF/v2-5/SubscriptionManager.sol
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Original file line number Diff line number Diff line change
Expand Up @@ -19,6 +19,10 @@ import {VRFV2PlusClient} from "@chainlink/contracts/src/v0.8/vrf/dev/libraries/V
*/

contract VRFv2PlusSubscriptionManager is VRFConsumerBaseV2Plus {

error InsufficientValue(uint256 required);
error NotEnoughBalance(uint256 available);

LinkTokenInterface LINKTOKEN;

// Sepolia coordinator. For other networks,
Expand Down Expand Up @@ -101,6 +105,18 @@ contract VRFv2PlusSubscriptionManager is VRFConsumerBaseV2Plus {
);
}

// 1000000000000000000 = 1 ether / native token
function topUpSubscriptionWithNativeToken(uint256 amount) external payable onlyOwner
{
if (msg.value < amount) {
revert InsufficientValue(amount);
}

s_vrfCoordinator.fundSubscriptionWithNative{value: amount}(
s_subscriptionId
);
}

function addConsumer(address consumerAddress) external onlyOwner {
// Add a consumer contract to the subscription.
s_vrfCoordinator.addConsumer(s_subscriptionId, consumerAddress);
Expand All @@ -122,4 +138,13 @@ contract VRFv2PlusSubscriptionManager is VRFConsumerBaseV2Plus {
function withdraw(uint256 amount, address to) external onlyOwner {
LINKTOKEN.transfer(to, amount);
}

// Transfer this contract's native token balance to an address.
// 1000000000000000000 = 1 ether / native token
function withdrawNativeToken(uint256 amount, address payable to) external onlyOwner {
if (address(this).balance < amount) {
revert NotEnoughBalance(address(this).balance);
}
to.transfer(amount);
}
}
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