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Contract Overview
Balance: 0.413346553897258228 Ether
Ether Value: $34.65 (@ $83.84/ETH)
Transactions: 98 txns
Token Tracker: EthPyramid (EPY)
Misc:
Address Watch: Add To Watch List
Contract Creator: 0xfaeeb28890c14f45e68a62e2e29b1b1e8d41c950at txn 0x48b8eb0341823d61c4374981f3800e357583745f68a4779bcd0d03ede30c9f19
Token Balance:
 Latest 25 transactions from a total of 98 transactions

TxHash Age From To Value [TxFee]
0x3319a1184ff2225eca31fc6883622c8bb81d9c7369452e04883a674448dc9b85140 days 5 hrs ago0x3e9f41ac3068bbb232dc422ec9d2857866b24c3d  IN   0xfd7107eec2f21f69d75d0d7479a7ff9de477e5c90 Ether0.000062627
0x01d276679ce17f06b4a298774bf817952e6ce9431e9fcf5abf4463b322c00cb7159 days 4 hrs ago0x415e94a5246ac4d3f16a833f51ff9066f215a421  IN   0xfd7107eec2f21f69d75d0d7479a7ff9de477e5c90 Ether0.00062627
0x76eb7e65aca9f3ea087e039fe7b700ef783ac073737529519c42a62a15a79380171 days 17 hrs ago0x415e94a5246ac4d3f16a833f51ff9066f215a421  IN   0xfd7107eec2f21f69d75d0d7479a7ff9de477e5c90 Ether0.000045927
0x44009e81a718c025118111c636e4fb6635c4ce6bcdc5f47d09c9a510b37d17e8190 days 14 hrs ago0x361084af8d45e07885b31fcedcb642b9cc7b72d7  IN   0xfd7107eec2f21f69d75d0d7479a7ff9de477e5c90 Ether0.000751524
0x7c016a75adeb4a99d21eb499519d6f56e7d78f2980df27917c35a054309ba59d194 days 15 hrs ago0x361084af8d45e07885b31fcedcb642b9cc7b72d7  IN   0xfd7107eec2f21f69d75d0d7479a7ff9de477e5c90 Ether0.000321489
0xc0968b83e324a9656457eb2df7753e213e45e151ef071a777af13a730fd9f64e198 days 8 hrs ago0x3e9f41ac3068bbb232dc422ec9d2857866b24c3d  IN   0xfd7107eec2f21f69d75d0d7479a7ff9de477e5c90.1 Ether0.00148506
0x44acf89fffb7643743e83adb29a0cec61ed04baee76e99c665a3b46c74749bc8199 days 2 hrs ago0x3e9f41ac3068bbb232dc422ec9d2857866b24c3d  IN   0xfd7107eec2f21f69d75d0d7479a7ff9de477e5c90 Ether0.000688897
0x70e05fc43f5aa20fbe72941332833a19953a53953299da5e3fe916f69206152d201 days 9 hrs ago0x391a3ea52c4a9f04be6900c3fd057dd9676c72e1  IN   0xfd7107eec2f21f69d75d0d7479a7ff9de477e5c90 Ether0.00025022
0x67bbd9f7dd2cb68ccf517e2c13befb8e333e6824e68d7ab303f9b4f3f212964d202 days 13 hrs ago0x341c48c0e833e179cca6c605b823e9a4911a3d00  IN   0xfd7107eec2f21f69d75d0d7479a7ff9de477e5c90 Ether0.00062555
0x8afbee8b15233e1c23f3c350e6299d351fe6be95a9070e9ad0395a2392c80421204 days 9 hrs ago0x3d2084d65cd56583aaf306e38db432a399b34b63  IN   0xfd7107eec2f21f69d75d0d7479a7ff9de477e5c90 Ether0.000813215
0x2061f709396e8dcc80dc218a4afb2b97e184e5f4800cf465a335b95fa5409004206 days 20 hrs ago0x739521d1a43d4a7e1c6b8a3d5c39906455ed3a45  IN   0xfd7107eec2f21f69d75d0d7479a7ff9de477e5c90.001 Ether0.00089181
0x959d80417a8532cd687ac0fdb7a0221e72a9283746fe772f40647c94522dff30209 days 4 hrs ago0x361084af8d45e07885b31fcedcb642b9cc7b72d7  IN   0xfd7107eec2f21f69d75d0d7479a7ff9de477e5c90.005 Ether0.00059181
0x935abdd4ce6da8d55ecefa9c5acca2acc7be5a52bc87833d5e029c85ca586b2f209 days 10 hrs ago0x361084af8d45e07885b31fcedcb642b9cc7b72d7  IN   0xfd7107eec2f21f69d75d0d7479a7ff9de477e5c90.03 Ether0.000710172
0x5a3fda2d798f52f59aa4702a269055330c0ff269e34403bd0899ac72eb6c6fa9210 days 23 hrs ago0x361084af8d45e07885b31fcedcb642b9cc7b72d7  IN   0xfd7107eec2f21f69d75d0d7479a7ff9de477e5c90.03 Ether0.00059181
0x5c7d67d4b02e0e0ed3e2b75527c9260c3ff111982035697c97f36e7d372fd844213 days 9 hrs ago0x361084af8d45e07885b31fcedcb642b9cc7b72d7  IN   0xfd7107eec2f21f69d75d0d7479a7ff9de477e5c90.025 Ether0.00059181
0xe6007d0a62add6d1f2c487b115ebd3cf4a6ccaab556dcdfcb2ca9d9e26990be1213 days 9 hrs ago0x361084af8d45e07885b31fcedcb642b9cc7b72d7  IN   0xfd7107eec2f21f69d75d0d7479a7ff9de477e5c90.015 Ether0.00059253
0x31226b5455f291b1d172fb6404affbf1834e552fcb14f60715b8186efff96ac0214 days 16 hrs ago0x361084af8d45e07885b31fcedcb642b9cc7b72d7  IN   0xfd7107eec2f21f69d75d0d7479a7ff9de477e5c90.01 Ether0.000474024
0x11d8461492fd2c7a4a8dec36974b5824923d53278094f3c48130c476fc547242215 days 5 hrs ago0xbd6e69144841557cf7757045716628f574167cf0  IN   0xfd7107eec2f21f69d75d0d7479a7ff9de477e5c90 Ether0.000183708
0xd1ae5b117c5f10b5ef9099570eb748fd32264e9370f673749052968f950eefeb215 days 5 hrs ago0xbd6e69144841557cf7757045716628f574167cf0  IN   0xfd7107eec2f21f69d75d0d7479a7ff9de477e5c90 Ether0.00022935
0x983a1f08985bea887e3444e6bc075c938c2d915c385df151adb217f45fc58b2a215 days 23 hrs ago0x1ed45acba1c716c8fbe88aa35d27842fb612e20a  IN   0xfd7107eec2f21f69d75d0d7479a7ff9de477e5c90 Ether0.000187665
0x3017a65588022a36191396c09b60c98c0f354aa0920fb9de756fc277609a0620220 days 9 hrs ago0x361084af8d45e07885b31fcedcb642b9cc7b72d7  IN   0xfd7107eec2f21f69d75d0d7479a7ff9de477e5c90.0059 Ether0.000236724
0x0caa854470eb2f6818507d2b44786a5a784ea95e602f33a8fe89ee7dfde7e0c0223 days 3 hrs ago0x1ed45acba1c716c8fbe88aa35d27842fb612e20a  IN   0xfd7107eec2f21f69d75d0d7479a7ff9de477e5c90 Ether0.0001374261
0x4f11ca61d5cf6b03ce6a0fd435dbb95f1a8d0129962e13eb2bcb9f89242ccef3223 days 14 hrs ago0x3e9f41ac3068bbb232dc422ec9d2857866b24c3d  IN   0xfd7107eec2f21f69d75d0d7479a7ff9de477e5c90 Ether0.000091854
0x723693c7e3b8bef743660d480fde3bfd43ab46423e1bf02152f1471023b59123224 days 21 hrs ago0x1ed45acba1c716c8fbe88aa35d27842fb612e20a  IN   0xfd7107eec2f21f69d75d0d7479a7ff9de477e5c90.15 Ether0.0001872801
0x1e580635129a05c887fba88a7d517a9473ea61f94c1a975433c8ce76c5123d40225 days 4 hrs ago0xaec539a116fa75e8bdcf016d3c146a25bc1af93b  IN   0xfd7107eec2f21f69d75d0d7479a7ff9de477e5c90 Ether0.000229635
[ Download CSV Export  ] 
 Internal Transactions as a result of Contract Execution
 Latest 25 Internal Txns, Click here To View More View All
ParentTxHash Block Age From To Value
0x3319a1184ff2225eca31fc6883622c8bb81d9c7369452e04883a674448dc9b856040692140 days 5 hrs ago0xfd7107eec2f21f69d75d0d7479a7ff9de477e5c90x3e9f41ac3068bbb232dc422ec9d2857866b24c3d0.070301560129120404 Ether
0x01d276679ce17f06b4a298774bf817952e6ce9431e9fcf5abf4463b322c00cb75928875159 days 4 hrs ago0xfd7107eec2f21f69d75d0d7479a7ff9de477e5c90x415e94a5246ac4d3f16a833f51ff9066f215a4210.003999706994800981 Ether
0x76eb7e65aca9f3ea087e039fe7b700ef783ac073737529519c42a62a15a793805855981171 days 17 hrs ago0xfd7107eec2f21f69d75d0d7479a7ff9de477e5c90x415e94a5246ac4d3f16a833f51ff9066f215a4210.000917026729138514 Ether
0x44009e81a718c025118111c636e4fb6635c4ce6bcdc5f47d09c9a510b37d17e85746907190 days 14 hrs ago0xfd7107eec2f21f69d75d0d7479a7ff9de477e5c90x361084af8d45e07885b31fcedcb642b9cc7b72d70.086850603565103052 Ether
0x7c016a75adeb4a99d21eb499519d6f56e7d78f2980df27917c35a054309ba59d5724297194 days 15 hrs ago0xfd7107eec2f21f69d75d0d7479a7ff9de477e5c90x361084af8d45e07885b31fcedcb642b9cc7b72d70.006386439635357104 Ether
0x44acf89fffb7643743e83adb29a0cec61ed04baee76e99c665a3b46c74749bc85699015199 days 2 hrs ago0xfd7107eec2f21f69d75d0d7479a7ff9de477e5c90x3e9f41ac3068bbb232dc422ec9d2857866b24c3d0.140888222917418546 Ether
0x70e05fc43f5aa20fbe72941332833a19953a53953299da5e3fe916f69206152d5686090201 days 9 hrs ago0xfd7107eec2f21f69d75d0d7479a7ff9de477e5c90x391a3ea52c4a9f04be6900c3fd057dd9676c72e10.011023813302213739 Ether
0x67bbd9f7dd2cb68ccf517e2c13befb8e333e6824e68d7ab303f9b4f3f212964d5679491202 days 13 hrs ago0xfd7107eec2f21f69d75d0d7479a7ff9de477e5c90x341c48c0e833e179cca6c605b823e9a4911a3d000.029896378491602772 Ether
0x8afbee8b15233e1c23f3c350e6299d351fe6be95a9070e9ad0395a2392c804215669149204 days 9 hrs ago0xfd7107eec2f21f69d75d0d7479a7ff9de477e5c90x3d2084d65cd56583aaf306e38db432a399b34b630.017967623982442019 Ether
0x11d8461492fd2c7a4a8dec36974b5824923d53278094f3c48130c476fc5472425608000215 days 5 hrs ago0xfd7107eec2f21f69d75d0d7479a7ff9de477e5c90xbd6e69144841557cf7757045716628f574167cf00.049556851902255772 Ether
0x983a1f08985bea887e3444e6bc075c938c2d915c385df151adb217f45fc58b2a5603737215 days 23 hrs ago0xfd7107eec2f21f69d75d0d7479a7ff9de477e5c90x1ed45acba1c716c8fbe88aa35d27842fb612e20a0.123053368125742835 Ether
0x4f11ca61d5cf6b03ce6a0fd435dbb95f1a8d0129962e13eb2bcb9f89242ccef35559826223 days 14 hrs ago0xfd7107eec2f21f69d75d0d7479a7ff9de477e5c90x3e9f41ac3068bbb232dc422ec9d2857866b24c3d0.011991875196913694 Ether
0x1e580635129a05c887fba88a7d517a9473ea61f94c1a975433c8ce76c5123d405550735225 days 4 hrs ago0xfd7107eec2f21f69d75d0d7479a7ff9de477e5c90xaec539a116fa75e8bdcf016d3c146a25bc1af93b0.12145904473224467 Ether
0xfacd606bf825102aadfbdd669bd1193352f23b9329b14fe119f8055b4de38ce95550371225 days 6 hrs ago0xfd7107eec2f21f69d75d0d7479a7ff9de477e5c90x341c48c0e833e179cca6c605b823e9a4911a3d000.006532708140217084 Ether
0xe8db1d89293988c26b50b7f4ae8b79a7132f0fc4da37a63c9fb9c2b69f343f545539786227 days 2 hrs ago0xfd7107eec2f21f69d75d0d7479a7ff9de477e5c90xf2898375a42deda8a52147ae7bbf58d6c84c3b760.075966648776652404 Ether
0x05a3af1357a452a6b4db6afa9c6acf94f22d889e46d0cf656664d077dcaab4cb5515481231 days 8 hrs ago0xfd7107eec2f21f69d75d0d7479a7ff9de477e5c90x8da4f82dc4d03c5421bb2087f858750c650d85710.192954440772080541 Ether
0x378ed4b1002f74c5eac23edce5aa6f1e3b281f60abf41c44ae0735f4f99f7f315510858232 days 4 hrs ago0xfd7107eec2f21f69d75d0d7479a7ff9de477e5c90xb9cc1875eec851548cb7eca33ecc643fce9d44e30.089452767774395687 Ether
0xe54061ae18388c08101e1105561c7b93c1c2a2a9d48467366a59e3f22090d96e5499919234 days 1 hr ago0xfd7107eec2f21f69d75d0d7479a7ff9de477e5c90x415e94a5246ac4d3f16a833f51ff9066f215a4210.000281887748058752 Ether
0x85ade4417d1d7fbcef54026e53d83ef13c87b58f474f9b44f01c879bdb4925025496654234 days 14 hrs ago0xfd7107eec2f21f69d75d0d7479a7ff9de477e5c90xab8c5c034f1cd123c62413a88ef3ada2d90f68c50.028080058606128309 Ether
0x3ce3617f69cf0b54679a8b3f972ae9a21fc1c8780d5060ea6ec8c5004300c0bd5491507235 days 12 hrs ago0xfd7107eec2f21f69d75d0d7479a7ff9de477e5c90x8da4f82dc4d03c5421bb2087f858750c650d85710.008229300664351067 Ether
0x3c81e9a893fa645eacdf8bb148b177b2a6166527a1b641cb08d16a1731e5b1925485641236 days 12 hrs ago0xfd7107eec2f21f69d75d0d7479a7ff9de477e5c90xbd6e69144841557cf7757045716628f574167cf00.001559714705048921 Ether
0x45f51ccf93f304bd5da50baaac963fd6e13186ab78c93edacd3afeca9f84d8265480038237 days 11 hrs ago0xfd7107eec2f21f69d75d0d7479a7ff9de477e5c90x3e9f41ac3068bbb232dc422ec9d2857866b24c3d0.009803427335178929 Ether
0x210bfdc2cb2f91dedf98dfe51faccdeddf3f6feae9ca1609774c05a7fe2e8a965474248238 days 10 hrs ago0xfd7107eec2f21f69d75d0d7479a7ff9de477e5c90xf2898375a42deda8a52147ae7bbf58d6c84c3b760.001557798916178269 Ether
0x3a103912fadd4a6c8b3a8a2b64d067207dcf16b88ba6c67080f7c5be0dcd56b65441675244 days 47 mins ago0xfd7107eec2f21f69d75d0d7479a7ff9de477e5c90x4f0d861281161f39c62b790995fb1e7a0b81b07b0.046285580279098098 Ether
0xade11f76e92abd71c12ed7ad70093f72db64df2d46a736195e6294234e0c16165422145247 days 8 hrs ago0xfd7107eec2f21f69d75d0d7479a7ff9de477e5c90x9c78a2224b763ee6bb652de945e70d22561e8afd0.016214608974920387 Ether
[ Download CSV Export  ] 
Warning: The Compiled Contract might be susceptible to ExpExponentCleanup (medium/high-severity), EventStructWrongData (very low-severity), NestedArrayFunctionCallDecoder (medium-severity) SolidityCompiler Bugs.

Contract Source Code Verified (Similar Match)
Note: Displaying Similar Match Verified Source Code At Contract 0xc908a34165d2720d12ffcfb6b99b47161b1c9946(Excluding Constructor Arguments if any)
Contract Name: EthPyramid
Compiler Text: v0.4.20-nightly.2018.1.29+commit.a668b9de
Optimization Enabled: Yes
Runs (Optimiser):  200



  Contract Source Code   Find Similiar Contracts

pragma solidity ^0.4.18;

/*
          ,/`.
        ,'/ __`.
      ,'_/_  _ _`.
    ,'__/_ ___ _  `.
  ,'_  /___ __ _ __ `.
 '-.._/___...-"-.-..__`.
  B

 EthPyramid. A no-bullshit, transparent, self-sustaining pyramid scheme.
 
 Inspired by https://test.jochen-hoenicke.de/eth/ponzitoken/

 Developers:
	Arc
	Divine
	Norsefire
	ToCsIcK
	
 Front-End:
	Cardioth
	tenmei
	Trendium
	
 Moral Support:
	DeadCow.Rat
	Dots
	FatKreamy
	Kaseylol
	QuantumDeath666
	Quentin
 
 Shit-Tier:
	HentaiChrist
 
*/

contract EthPyramid {

	// scaleFactor is used to convert Ether into tokens and vice-versa: they're of different
	// orders of magnitude, hence the need to bridge between the two.
	uint256 constant scaleFactor = 0x10000000000000000;  // 2^64

	// CRR = 50%
	// CRR is Cash Reserve Ratio (in this case Crypto Reserve Ratio).
	// For more on this: check out https://en.wikipedia.org/wiki/Reserve_requirement
	int constant crr_n = 1; // CRR numerator
	int constant crr_d = 2; // CRR denominator

	// The price coefficient. Chosen such that at 1 token total supply
	// the amount in reserve is 0.5 ether and token price is 1 Ether.
	int constant price_coeff = -0x296ABF784A358468C;

	// Typical values that we have to declare.
	string constant public name = "EthPyramid";
	string constant public symbol = "EPY";
	uint8 constant public decimals = 18;

	// Array between each address and their number of tokens.
	mapping(address => uint256) public tokenBalance;
		
	// Array between each address and how much Ether has been paid out to it.
	// Note that this is scaled by the scaleFactor variable.
	mapping(address => int256) public payouts;

	// Variable tracking how many tokens are in existence overall.
	uint256 public totalSupply;

	// Aggregate sum of all payouts.
	// Note that this is scaled by the scaleFactor variable.
	int256 totalPayouts;

	// Variable tracking how much Ether each token is currently worth.
	// Note that this is scaled by the scaleFactor variable.
	uint256 earningsPerToken;
	
	// Current contract balance in Ether
	uint256 public contractBalance;

	function EthPyramid() public {}

	// The following functions are used by the front-end for display purposes.

	// Returns the number of tokens currently held by _owner.
	function balanceOf(address _owner) public constant returns (uint256 balance) {
		return tokenBalance[_owner];
	}

	// Withdraws all dividends held by the caller sending the transaction, updates
	// the requisite global variables, and transfers Ether back to the caller.
	function withdraw() public {
		// Retrieve the dividends associated with the address the request came from.
		var balance = dividends(msg.sender);
		
		// Update the payouts array, incrementing the request address by `balance`.
		payouts[msg.sender] += (int256) (balance * scaleFactor);
		
		// Increase the total amount that's been paid out to maintain invariance.
		totalPayouts += (int256) (balance * scaleFactor);
		
		// Send the dividends to the address that requested the withdraw.
		contractBalance = sub(contractBalance, balance);
		msg.sender.transfer(balance);
	}

	// Converts the Ether accrued as dividends back into EPY tokens without having to
	// withdraw it first. Saves on gas and potential price spike loss.
	function reinvestDividends() public {
		// Retrieve the dividends associated with the address the request came from.
		var balance = dividends(msg.sender);
		
		// Update the payouts array, incrementing the request address by `balance`.
		// Since this is essentially a shortcut to withdrawing and reinvesting, this step still holds.
		payouts[msg.sender] += (int256) (balance * scaleFactor);
		
		// Increase the total amount that's been paid out to maintain invariance.
		totalPayouts += (int256) (balance * scaleFactor);
		
		// Assign balance to a new variable.
		uint value_ = (uint) (balance);
		
		// If your dividends are worth less than 1 szabo, or more than a million Ether
		// (in which case, why are you even here), abort.
		if (value_ < 0.000001 ether || value_ > 1000000 ether)
			revert();
			
		// msg.sender is the address of the caller.
		var sender = msg.sender;
		
		// A temporary reserve variable used for calculating the reward the holder gets for buying tokens.
		// (Yes, the buyer receives a part of the distribution as well!)
		var res = reserve() - balance;

		// 10% of the total Ether sent is used to pay existing holders.
		var fee = div(value_, 10);
		
		// The amount of Ether used to purchase new tokens for the caller.
		var numEther = value_ - fee;
		
		// The number of tokens which can be purchased for numEther.
		var numTokens = calculateDividendTokens(numEther, balance);
		
		// The buyer fee, scaled by the scaleFactor variable.
		var buyerFee = fee * scaleFactor;
		
		// Check that we have tokens in existence (this should always be true), or
		// else you're gonna have a bad time.
		if (totalSupply > 0) {
			// Compute the bonus co-efficient for all existing holders and the buyer.
			// The buyer receives part of the distribution for each token bought in the
			// same way they would have if they bought each token individually.
			var bonusCoEff =
			    (scaleFactor - (res + numEther) * numTokens * scaleFactor / (totalSupply + numTokens) / numEther)
			    * (uint)(crr_d) / (uint)(crr_d-crr_n);
				
			// The total reward to be distributed amongst the masses is the fee (in Ether)
			// multiplied by the bonus co-efficient.
			var holderReward = fee * bonusCoEff;
			
			buyerFee -= holderReward;

			// Fee is distributed to all existing token holders before the new tokens are purchased.
			// rewardPerShare is the amount gained per token thanks to this buy-in.
			var rewardPerShare = holderReward / totalSupply;
			
			// The Ether value per token is increased proportionally.
			earningsPerToken += rewardPerShare;
		}
		
		// Add the numTokens which were just created to the total supply. We're a crypto central bank!
		totalSupply = add(totalSupply, numTokens);
		
		// Assign the tokens to the balance of the buyer.
		tokenBalance[sender] = add(tokenBalance[sender], numTokens);
		
		// Update the payout array so that the buyer cannot claim dividends on previous purchases.
		// Also include the fee paid for entering the scheme.
		// First we compute how much was just paid out to the buyer...
		var payoutDiff  = (int256) ((earningsPerToken * numTokens) - buyerFee);
		
		// Then we update the payouts array for the buyer with this amount...
		payouts[sender] += payoutDiff;
		
		// And then we finally add it to the variable tracking the total amount spent to maintain invariance.
		totalPayouts    += payoutDiff;
		
	}

	// Sells your tokens for Ether. This Ether is assigned to the callers entry
	// in the tokenBalance array, and therefore is shown as a dividend. A second
	// call to withdraw() must be made to invoke the transfer of Ether back to your address.
	function sellMyTokens() public {
		var balance = balanceOf(msg.sender);
		sell(balance);
	}

	// The slam-the-button escape hatch. Sells the callers tokens for Ether, then immediately
	// invokes the withdraw() function, sending the resulting Ether to the callers address.
    function getMeOutOfHere() public {
		sellMyTokens();
        withdraw();
	}

	// Gatekeeper function to check if the amount of Ether being sent isn't either
	// too small or too large. If it passes, goes direct to buy().
	function fund() payable public {
		// Don't allow for funding if the amount of Ether sent is less than 1 szabo.
		if (msg.value > 0.000001 ether) {
		    contractBalance = add(contractBalance, msg.value);
			buy();
		} else {
			revert();
		}
    }

	// Function that returns the (dynamic) price of buying a finney worth of tokens.
	function buyPrice() public constant returns (uint) {
		return getTokensForEther(1 finney);
	}

	// Function that returns the (dynamic) price of selling a single token.
	function sellPrice() public constant returns (uint) {
        var eth = getEtherForTokens(1 finney);
        var fee = div(eth, 10);
        return eth - fee;
    }

	// Calculate the current dividends associated with the caller address. This is the net result
	// of multiplying the number of tokens held by their current value in Ether and subtracting the
	// Ether that has already been paid out.
	function dividends(address _owner) public constant returns (uint256 amount) {
		return (uint256) ((int256)(earningsPerToken * tokenBalance[_owner]) - payouts[_owner]) / scaleFactor;
	}

	// Version of withdraw that extracts the dividends and sends the Ether to the caller.
	// This is only used in the case when there is no transaction data, and that should be
	// quite rare unless interacting directly with the smart contract.
	function withdrawOld(address to) public {
		// Retrieve the dividends associated with the address the request came from.
		var balance = dividends(msg.sender);
		
		// Update the payouts array, incrementing the request address by `balance`.
		payouts[msg.sender] += (int256) (balance * scaleFactor);
		
		// Increase the total amount that's been paid out to maintain invariance.
		totalPayouts += (int256) (balance * scaleFactor);
		
		// Send the dividends to the address that requested the withdraw.
		contractBalance = sub(contractBalance, balance);
		to.transfer(balance);		
	}

	// Internal balance function, used to calculate the dynamic reserve value.
	function balance() internal constant returns (uint256 amount) {
		// msg.value is the amount of Ether sent by the transaction.
		return contractBalance - msg.value;
	}

	function buy() internal {
		// Any transaction of less than 1 szabo is likely to be worth less than the gas used to send it.
		if (msg.value < 0.000001 ether || msg.value > 1000000 ether)
			revert();
						
		// msg.sender is the address of the caller.
		var sender = msg.sender;
		
		// 10% of the total Ether sent is used to pay existing holders.
		var fee = div(msg.value, 10);
		
		// The amount of Ether used to purchase new tokens for the caller.
		var numEther = msg.value - fee;
		
		// The number of tokens which can be purchased for numEther.
		var numTokens = getTokensForEther(numEther);
		
		// The buyer fee, scaled by the scaleFactor variable.
		var buyerFee = fee * scaleFactor;
		
		// Check that we have tokens in existence (this should always be true), or
		// else you're gonna have a bad time.
		if (totalSupply > 0) {
			// Compute the bonus co-efficient for all existing holders and the buyer.
			// The buyer receives part of the distribution for each token bought in the
			// same way they would have if they bought each token individually.
			var bonusCoEff =
			    (scaleFactor - (reserve() + numEther) * numTokens * scaleFactor / (totalSupply + numTokens) / numEther)
			    * (uint)(crr_d) / (uint)(crr_d-crr_n);
				
			// The total reward to be distributed amongst the masses is the fee (in Ether)
			// multiplied by the bonus co-efficient.
			var holderReward = fee * bonusCoEff;
			
			buyerFee -= holderReward;

			// Fee is distributed to all existing token holders before the new tokens are purchased.
			// rewardPerShare is the amount gained per token thanks to this buy-in.
			var rewardPerShare = holderReward / totalSupply;
			
			// The Ether value per token is increased proportionally.
			earningsPerToken += rewardPerShare;
			
		}

		// Add the numTokens which were just created to the total supply. We're a crypto central bank!
		totalSupply = add(totalSupply, numTokens);

		// Assign the tokens to the balance of the buyer.
		tokenBalance[sender] = add(tokenBalance[sender], numTokens);

		// Update the payout array so that the buyer cannot claim dividends on previous purchases.
		// Also include the fee paid for entering the scheme.
		// First we compute how much was just paid out to the buyer...
		var payoutDiff = (int256) ((earningsPerToken * numTokens) - buyerFee);
		
		// Then we update the payouts array for the buyer with this amount...
		payouts[sender] += payoutDiff;
		
		// And then we finally add it to the variable tracking the total amount spent to maintain invariance.
		totalPayouts    += payoutDiff;
		
	}

	// Sell function that takes tokens and converts them into Ether. Also comes with a 10% fee
	// to discouraging dumping, and means that if someone near the top sells, the fee distributed
	// will be *significant*.
	function sell(uint256 amount) internal {
	    // Calculate the amount of Ether that the holders tokens sell for at the current sell price.
		var numEthersBeforeFee = getEtherForTokens(amount);
		
		// 10% of the resulting Ether is used to pay remaining holders.
        var fee = div(numEthersBeforeFee, 10);
		
		// Net Ether for the seller after the fee has been subtracted.
        var numEthers = numEthersBeforeFee - fee;
		
		// *Remove* the numTokens which were just sold from the total supply. We're /definitely/ a crypto central bank.
		totalSupply = sub(totalSupply, amount);
		
        // Remove the tokens from the balance of the buyer.
		tokenBalance[msg.sender] = sub(tokenBalance[msg.sender], amount);

        // Update the payout array so that the seller cannot claim future dividends unless they buy back in.
		// First we compute how much was just paid out to the seller...
		var payoutDiff = (int256) (earningsPerToken * amount + (numEthers * scaleFactor));
		
        // We reduce the amount paid out to the seller (this effectively resets their payouts value to zero,
		// since they're selling all of their tokens). This makes sure the seller isn't disadvantaged if
		// they decide to buy back in.
		payouts[msg.sender] -= payoutDiff;		
		
		// Decrease the total amount that's been paid out to maintain invariance.
        totalPayouts -= payoutDiff;
		
		// Check that we have tokens in existence (this is a bit of an irrelevant check since we're
		// selling tokens, but it guards against division by zero).
		if (totalSupply > 0) {
			// Scale the Ether taken as the selling fee by the scaleFactor variable.
			var etherFee = fee * scaleFactor;
			
			// Fee is distributed to all remaining token holders.
			// rewardPerShare is the amount gained per token thanks to this sell.
			var rewardPerShare = etherFee / totalSupply;
			
			// The Ether value per token is increased proportionally.
			earningsPerToken = add(earningsPerToken, rewardPerShare);
		}
	}
	
	// Dynamic value of Ether in reserve, according to the CRR requirement.
	function reserve() internal constant returns (uint256 amount) {
		return sub(balance(),
			 ((uint256) ((int256) (earningsPerToken * totalSupply) - totalPayouts) / scaleFactor));
	}

	// Calculates the number of tokens that can be bought for a given amount of Ether, according to the
	// dynamic reserve and totalSupply values (derived from the buy and sell prices).
	function getTokensForEther(uint256 ethervalue) public constant returns (uint256 tokens) {
		return sub(fixedExp(fixedLog(reserve() + ethervalue)*crr_n/crr_d + price_coeff), totalSupply);
	}

	// Semantically similar to getTokensForEther, but subtracts the callers balance from the amount of Ether returned for conversion.
	function calculateDividendTokens(uint256 ethervalue, uint256 subvalue) public constant returns (uint256 tokens) {
		return sub(fixedExp(fixedLog(reserve() - subvalue + ethervalue)*crr_n/crr_d + price_coeff), totalSupply);
	}

	// Converts a number tokens into an Ether value.
	function getEtherForTokens(uint256 tokens) public constant returns (uint256 ethervalue) {
		// How much reserve Ether do we have left in the contract?
		var reserveAmount = reserve();

		// If you're the Highlander (or bagholder), you get The Prize. Everything left in the vault.
		if (tokens == totalSupply)
			return reserveAmount;

		// If there would be excess Ether left after the transaction this is called within, return the Ether
		// corresponding to the equation in Dr Jochen Hoenicke's original Ponzi paper, which can be found
		// at https://test.jochen-hoenicke.de/eth/ponzitoken/ in the third equation, with the CRR numerator 
		// and denominator altered to 1 and 2 respectively.
		return sub(reserveAmount, fixedExp((fixedLog(totalSupply - tokens) - price_coeff) * crr_d/crr_n));
	}

	// You don't care about these, but if you really do they're hex values for 
	// co-efficients used to simulate approximations of the log and exp functions.
	int256  constant one        = 0x10000000000000000;
	uint256 constant sqrt2      = 0x16a09e667f3bcc908;
	uint256 constant sqrtdot5   = 0x0b504f333f9de6484;
	int256  constant ln2        = 0x0b17217f7d1cf79ac;
	int256  constant ln2_64dot5 = 0x2cb53f09f05cc627c8;
	int256  constant c1         = 0x1ffffffffff9dac9b;
	int256  constant c3         = 0x0aaaaaaac16877908;
	int256  constant c5         = 0x0666664e5e9fa0c99;
	int256  constant c7         = 0x049254026a7630acf;
	int256  constant c9         = 0x038bd75ed37753d68;
	int256  constant c11        = 0x03284a0c14610924f;

	// The polynomial R = c1*x + c3*x^3 + ... + c11 * x^11
	// approximates the function log(1+x)-log(1-x)
	// Hence R(s) = log((1+s)/(1-s)) = log(a)
	function fixedLog(uint256 a) internal pure returns (int256 log) {
		int32 scale = 0;
		while (a > sqrt2) {
			a /= 2;
			scale++;
		}
		while (a <= sqrtdot5) {
			a *= 2;
			scale--;
		}
		int256 s = (((int256)(a) - one) * one) / ((int256)(a) + one);
		var z = (s*s) / one;
		return scale * ln2 +
			(s*(c1 + (z*(c3 + (z*(c5 + (z*(c7 + (z*(c9 + (z*c11/one))
				/one))/one))/one))/one))/one);
	}

	int256 constant c2 =  0x02aaaaaaaaa015db0;
	int256 constant c4 = -0x000b60b60808399d1;
	int256 constant c6 =  0x0000455956bccdd06;
	int256 constant c8 = -0x000001b893ad04b3a;
	
	// The polynomial R = 2 + c2*x^2 + c4*x^4 + ...
	// approximates the function x*(exp(x)+1)/(exp(x)-1)
	// Hence exp(x) = (R(x)+x)/(R(x)-x)
	function fixedExp(int256 a) internal pure returns (uint256 exp) {
		int256 scale = (a + (ln2_64dot5)) / ln2 - 64;
		a -= scale*ln2;
		int256 z = (a*a) / one;
		int256 R = ((int256)(2) * one) +
			(z*(c2 + (z*(c4 + (z*(c6 + (z*c8/one))/one))/one))/one);
		exp = (uint256) (((R + a) * one) / (R - a));
		if (scale >= 0)
			exp <<= scale;
		else
			exp >>= -scale;
		return exp;
	}
	
	// The below are safemath implementations of the four arithmetic operators
	// designed to explicitly prevent over- and under-flows of integer values.

	function mul(uint256 a, uint256 b) internal pure returns (uint256) {
		if (a == 0) {
			return 0;
		}
		uint256 c = a * b;
		assert(c / a == b);
		return c;
	}

	function div(uint256 a, uint256 b) internal pure returns (uint256) {
		// assert(b > 0); // Solidity automatically throws when dividing by 0
		uint256 c = a / b;
		// assert(a == b * c + a % b); // There is no case in which this doesn't hold
		return c;
	}

	function sub(uint256 a, uint256 b) internal pure returns (uint256) {
		assert(b <= a);
		return a - b;
	}

	function add(uint256 a, uint256 b) internal pure returns (uint256) {
		uint256 c = a + b;
		assert(c >= a);
		return c;
	}

	// This allows you to buy tokens by sending Ether directly to the smart contract
	// without including any transaction data (useful for, say, mobile wallet apps).
	function () payable public {
		// msg.value is the amount of Ether sent by the transaction.
		if (msg.value > 0) {
			fund();
		} else {
			withdrawOld(msg.sender);
		}
	}
}

    Contract ABI  
[{"constant":true,"inputs":[],"name":"name","outputs":[{"name":"","type":"string"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"totalSupply","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"decimals","outputs":[{"name":"","type":"uint8"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"to","type":"address"}],"name":"withdrawOld","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[],"name":"withdraw","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"sellPrice","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"name":"ethervalue","type":"uint256"}],"name":"getTokensForEther","outputs":[{"name":"tokens","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"name":"","type":"address"}],"name":"payouts","outputs":[{"name":"","type":"int256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"name":"_owner","type":"address"}],"name":"dividends","outputs":[{"name":"amount","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"name":"_owner","type":"address"}],"name":"balanceOf","outputs":[{"name":"balance","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"buyPrice","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"contractBalance","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[],"name":"reinvestDividends","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"symbol","outputs":[{"name":"","type":"string"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[],"name":"getMeOutOfHere","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[],"name":"fund","outputs":[],"payable":true,"stateMutability":"payable","type":"function"},{"constant":true,"inputs":[{"name":"tokens","type":"uint256"}],"name":"getEtherForTokens","outputs":[{"name":"ethervalue","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"name":"ethervalue","type":"uint256"},{"name":"subvalue","type":"uint256"}],"name":"calculateDividendTokens","outputs":[{"name":"tokens","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[],"name":"sellMyTokens","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"name":"","type":"address"}],"name":"tokenBalance","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"inputs":[],"payable":false,"stateMutability":"nonpayable","type":"constructor"},{"payable":true,"stateMutability":"payable","type":"fallback"}]

  Contract Creation Code Switch To Opcodes View
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   Swarm Source:
bzzr://6c7d107dcbe6f00e6ccb3d36b76f1e1c60de2a3c015200fad50d432f2f7f92f3

 

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