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-rw-r--r--Year_3/Blockchain/RandomMoney.sol43
1 files changed, 43 insertions, 0 deletions
diff --git a/Year_3/Blockchain/RandomMoney.sol b/Year_3/Blockchain/RandomMoney.sol
new file mode 100644
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+++ b/Year_3/Blockchain/RandomMoney.sol
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+// SPDX-License-Identifier: MIT
+
+pragma solidity >0.7 <0.9;
+
+contract RandomMoney {
+ uint public total;
+ uint public constant minFee = 10;
+ mapping(address => uint) public amounts;
+ address[] private members;
+
+
+ function play() public payable returns (uint) {
+ require(msg.value >= minFee, "Value is less than the required minimum");
+
+
+ amounts[msg.sender] += msg.value;
+
+ if (amounts[msg.sender] == msg.value) {
+ members.push(msg.sender);
+ }
+
+ total += msg.value;
+
+ return total;
+ }
+
+ function pay() public payable {
+ address payable account = payable(randomAddress());
+ account.transfer(total);
+ total = 0;
+ }
+
+ function randomAddress() internal view returns (address) {
+ uint8 num = uint8(
+ uint256(
+ keccak256(abi.encode(block.timestamp, block.difficulty))
+ ) % members.length
+ );
+
+ return members[num];
+ }
+}
+