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  1. pragma solidity ^ 0.5.11;
  2. contract Pyramid{
  3.     // scaleFactor is used to convert Ether into bonds and vice-versa: they're of different
  4.     // orders of magnitude, hence the need to bridge between the two.
  5.     uint256 constant scaleFactor = 0x10000000000000000;
  6.  
  7.     int constant crr_n = 1;
  8.     int constant crr_d = 2;
  9.  
  10.     int constant public price_coeff = -0x1337FA66607BADA55;
  11.  
  12.     // Typical values that we have to declare.
  13.     string constant public name = "Bond";
  14.     string constant public symbol = "BOND";
  15.     uint8 constant public decimals = 12;
  16.  
  17.     // Array between each address and their number of bonds.
  18.     mapping(address => uint256) public hodlBonds;
  19.     // For calculating resolves minted
  20.     mapping(address => uint256) public avgFactor_ethSpent;
  21.     // For calculating hodl multiplier that factors into resolves minted
  22.     mapping(address => uint256) public avgFactor_buyInTimeSum;
  23.     // Array between each address and their number of resolves being staked.
  24.     mapping(address => uint256) public resolveWeight;
  25.  
  26.     // Array between each address and how much Ether has been paid out to it.
  27.     // Note that this is scaled by the scaleFactor variable.
  28.     mapping(address => int256) public payouts;
  29.  
  30.     // Variable tracking how many bonds are in existence overall.
  31.     uint256 public _totalSupply;
  32.  
  33.     // The total number of resolves being staked in this contract
  34.     uint256 public dissolvingResolves;
  35.     // The total number of resolves burned for a return of ETH(withdraw) or Bonds(reinvest)
  36.     uint256 public dissolved;
  37.  
  38.     // The ethereum locked up into bonds
  39.     uint public contractBalance;
  40.  
  41.     // Easing in the fee. Make the fee reasonable as the contract is scaling to the size of the ecosystem
  42.     uint256 public buySum;
  43.     uint256 public sellSum;
  44.  
  45.     // For calculating the hodl multiplier. Weighted average release time
  46.     uint public avgFactor_releaseWeight;
  47.     uint public avgFactor_releaseTimeSum;
  48.     // base time on when the contract was created
  49.     uint public genesis;
  50.  
  51.     // Aggregate sum of all payouts.
  52.     // Note that this is scaled by the scaleFactor variable.
  53.     int256 totalPayouts;
  54.  
  55.     // Variable tracking how much Ether each token is currently worth.
  56.     // Note that this is scaled by the scaleFactor variable.
  57.     uint256 earningsPerResolve;
  58.     uint remainderForDividends;
  59.  
  60.     //The resolve token contract
  61.     ResolveToken public resolveToken;
  62.  
  63.     constructor() public{
  64.         genesis = now;
  65.         resolveToken = new ResolveToken( address(this) );
  66.     }
  67.  
  68.     function totalSupply() public view returns (uint256) {
  69.         return _totalSupply;
  70.     }
  71.     function getResolveContract() public view returns(address){ return address(resolveToken); }
  72.     // Returns the number of bonds currently held by _owner.
  73.     function balanceOf(address _owner) public view returns (uint256 balance) {
  74.         return hodlBonds[_owner];
  75.     }
  76.  
  77.     function fluxFee(uint paidAmount) public view returns (uint fee) {
  78.         if (dissolvingResolves == 0)
  79.             return 0;
  80.        
  81.         uint totalResolveSupply = resolveToken.totalSupply() - dissolved;
  82.         return paidAmount * dissolvingResolves / totalResolveSupply * sellSum / buySum;
  83.     }
  84.  
  85.     // Converts the Ether accrued as resolveEarnings back into bonds without having to
  86.     // withdraw it first. Saves on gas and potential price spike loss.
  87.     event Reinvest( address indexed addr, uint256 reinvested, uint256 dissolved, uint256 bonds, uint256 resolveTax);
  88.     function reinvestEarnings(uint amountFromEarnings) public returns(uint,uint){
  89.         // Retrieve the resolveEarnings associated with the address the request came from.     
  90.         uint totalEarnings = resolveEarnings(msg.sender);
  91.         require(amountFromEarnings <= totalEarnings, "the amount exceeds total earnings");
  92.         uint oldWeight = resolveWeight[msg.sender];
  93.         resolveWeight[msg.sender] = oldWeight *  (totalEarnings - amountFromEarnings) / totalEarnings;
  94.         uint weightDiff = oldWeight - resolveWeight[msg.sender];
  95.         dissolved += weightDiff;
  96.         dissolvingResolves -= weightDiff;
  97.  
  98.         // For maintaing payout invariance
  99.         int resolvePayoutDiff  = (int256) (earningsPerResolve * weightDiff);
  100.  
  101.         payouts[msg.sender] += resolvePayoutDiff;
  102.  
  103.         totalPayouts += resolvePayoutDiff;
  104.  
  105.         // Assign balance to a new variable.
  106.         uint value_ = (uint) (amountFromEarnings);
  107.  
  108.         // If your resolveEarnings are worth less than 1 szabo, abort.
  109.         if (value_ < 0.000001 ether)
  110.             revert();
  111.  
  112.         // msg.sender is the address of the caller.
  113.         address sender = msg.sender;
  114.  
  115.         // Calculate the fee
  116.         uint fee = fluxFee(value_);
  117.  
  118.         // The amount of Ether used to purchase new bonds for the caller
  119.         uint numEther = value_ - fee;
  120.         buySum += numEther;
  121.  
  122.         //resolve reward tracking stuff
  123.         uint currentTime = NOW();
  124.         avgFactor_ethSpent[msg.sender] += numEther;
  125.         avgFactor_buyInTimeSum[msg.sender] += currentTime * scaleFactor * numEther;
  126.  
  127.         // The number of bonds which can be purchased for numEther.
  128.         uint createdBonds = calculateBondsFromReinvest(numEther, amountFromEarnings);
  129.  
  130.         // the variable storing the amount to be paid to stakers
  131.         uint resolveFee;
  132.  
  133.         // Check if we have bonds in existence
  134.         if (_totalSupply > 0 && fee > 0) {
  135.             resolveFee = fee * scaleFactor;
  136.  
  137.             // Fee is distributed to all existing resolve stakers before the new bonds are purchased.
  138.             // rewardPerResolve is the amount(ETH) gained per resolve token from this purchase.
  139.             uint rewardPerResolve = resolveFee/dissolvingResolves;
  140.  
  141.             // The Ether value per token is increased proportionally.
  142.             earningsPerResolve += rewardPerResolve;
  143.         }
  144.  
  145.         // Add the createdBonds to the total supply.
  146.         _totalSupply += createdBonds;
  147.  
  148.         // Assign the bonds to the balance of the buyer.
  149.         hodlBonds[sender] += createdBonds;
  150.  
  151.         emit Reinvest(msg.sender, value_, weightDiff, createdBonds, resolveFee);
  152.         return (createdBonds, weightDiff);
  153.     }
  154.  
  155.     // Sells your bonds for Ether
  156.     function sellAllBonds() public {
  157.         sell( balanceOf(msg.sender) );
  158.     }
  159.     function sellBonds(uint amount) public returns(uint,uint){
  160.         uint balance = balanceOf(msg.sender);
  161.         require(balance >= amount, "Amount is more than balance");
  162.         uint returned_eth;
  163.         uint returned_resolves;
  164.         (returned_eth, returned_resolves) = sell(amount);
  165.         return (returned_eth, returned_resolves);
  166.     }
  167.  
  168.     // Big red exit button to pull all of a holder's Ethereum value from the contract
  169.     function getMeOutOfHere() public {
  170.         sellAllBonds();
  171.         withdraw( resolveEarnings(msg.sender) );
  172.     }
  173.  
  174.     // Gatekeeper function to check if the amount of Ether being sent isn't too small
  175.     function fund() payable public returns(uint){
  176.         uint bought;
  177.         if (msg.value > 0.000001 ether) {
  178.             contractBalance += msg.value;
  179.             bought = buy();
  180.         } else {
  181.             revert();
  182.         }
  183.         return bought;
  184.     }
  185.  
  186.     // Function that returns the (dynamic) pricing for buys, sells and fee
  187.     function pricing(uint scale) public view returns (uint buyPrice, uint sellPrice, uint fee) {
  188.         uint buy_eth = scaleFactor * getPriceForBonds( scale, true) / ( scaleFactor - fluxFee(scaleFactor) ) ;
  189.         uint sell_eth = getPriceForBonds(scale, false);
  190.         sell_eth -= fluxFee(sell_eth);
  191.         return ( buy_eth, sell_eth, fluxFee(scale) );
  192.     }
  193.  
  194.     // For calculating the price
  195.     function getPriceForBonds(uint256 bonds, bool upDown) public view returns (uint256 price) {
  196.         uint reserveAmount = reserve();
  197.  
  198.         if(upDown){
  199.             uint x = fixedExp((fixedLog(_totalSupply + bonds) - price_coeff) * crr_d/crr_n);
  200.             return x - reserveAmount;
  201.         }else{
  202.             uint x = fixedExp((fixedLog(_totalSupply - bonds) - price_coeff) * crr_d/crr_n);
  203.             return reserveAmount - x;
  204.         }
  205.     }
  206.  
  207.     // Calculate the current resolveEarnings associated with the caller address. This is the net result
  208.     // of multiplying the number of resolves held by their current value in Ether and subtracting the
  209.     // Ether that has already been paid out.
  210.     function resolveEarnings(address _owner) public view returns (uint256 amount) {
  211.         return (uint256) ((int256)(earningsPerResolve * resolveWeight[_owner]) - payouts[_owner]) / scaleFactor;
  212.     }
  213.  
  214.     event Buy( address indexed addr, uint256 spent, uint256 bonds, uint256 resolveTax);
  215.     function buy() internal returns(uint){
  216.         // Any transaction of less than 1 szabo is likely to be worth less than the gas used to send it.
  217.         if ( msg.value < 0.000001 ether )
  218.             revert();
  219.  
  220.         // Calculate the fee
  221.         uint fee = fluxFee(msg.value);
  222.  
  223.         // The amount of Ether used to purchase new bonds for the caller.
  224.         uint numEther = msg.value - fee;
  225.         buySum += numEther;
  226.  
  227.         //resolve reward tracking stuff
  228.         uint currentTime = NOW();
  229.         avgFactor_ethSpent[msg.sender] += numEther;
  230.         avgFactor_buyInTimeSum[msg.sender] += currentTime * scaleFactor * numEther;
  231.  
  232.         // The number of bonds which can be purchased for numEther.
  233.         uint createdBonds = getBondsForEther(numEther);
  234.  
  235.         // Add the createdBonds to the total supply.
  236.         _totalSupply += createdBonds;
  237.  
  238.         // Assign the bonds to the balance of the buyer.
  239.         hodlBonds[msg.sender] += createdBonds;
  240.  
  241.         // Check if we have bonds in existence
  242.         uint resolveFee;
  243.         if (_totalSupply > 0 && fee > 0) {
  244.             resolveFee = fee * scaleFactor;
  245.  
  246.             // Fee is distributed to all existing resolve holders before the new bonds are purchased.
  247.             // rewardPerResolve is the amount gained per resolve token from this purchase.
  248.             uint rewardPerResolve = resolveFee/dissolvingResolves;
  249.  
  250.             // The Ether value per resolve is increased proportionally.
  251.             earningsPerResolve += rewardPerResolve;
  252.         }
  253.         emit Buy( msg.sender, msg.value, createdBonds, resolveFee);
  254.         return createdBonds;
  255.     }
  256.     function NOW() public view returns(uint time){
  257.         return now - genesis;
  258.     }
  259.     function avgHodl() public view returns(uint hodlTime){
  260.         return avgFactor_releaseTimeSum / avgFactor_releaseWeight / scaleFactor;
  261.     }
  262.     function getReturnsForBonds(address addr, uint bondsReleased) public view returns(uint etherValue, uint mintedResolves, uint new_releaseTimeSum, uint new_releaseWeight, uint initialInput_ETH){
  263.         uint output_ETH = getEtherForBonds(bondsReleased);
  264.         uint input_ETH = avgFactor_ethSpent[addr] * bondsReleased / hodlBonds[addr];
  265.         // hodl multiplier. because if you don't hodl at all, you shouldn't be rewarded resolves.
  266.         // and the multiplier you get for hodling needs to be relative to the average hodl
  267.         uint buyInTime = avgFactor_buyInTimeSum[addr] / avgFactor_ethSpent[addr];
  268.         uint cashoutTime = NOW()*scaleFactor - buyInTime;
  269.         uint releaseTimeSum = avgFactor_releaseTimeSum + cashoutTime*input_ETH/scaleFactor/*to give new life more weight--->*/*buyInTime;
  270.         uint releaseWeight = avgFactor_releaseWeight + input_ETH/*to give new life more weight--->*/*buyInTime/scaleFactor;
  271.         uint avgCashoutTime = releaseTimeSum/releaseWeight;
  272.         return (output_ETH, input_ETH * cashoutTime / avgCashoutTime * input_ETH / output_ETH, releaseTimeSum, releaseWeight, input_ETH);
  273.     }
  274.     event Sell( address indexed addr, uint256 bondsSold, uint256 cashout, uint256 resolves, uint256 resolveTax, uint256 initialCash);
  275.     function sell(uint256 amount) internal returns(uint eth, uint resolves){
  276.         // Calculate the amount of Ether & Resolves that the holder's bonds sell for at the current sell price.
  277.         uint numEthersBeforeFee;
  278.         uint mintedResolves;
  279.         uint releaseTimeSum;
  280.         uint releaseWeight;
  281.         uint initialInput_ETH;
  282.         (numEthersBeforeFee,mintedResolves,releaseTimeSum,releaseWeight,initialInput_ETH) = getReturnsForBonds(msg.sender, amount);
  283.  
  284.         // magic distribution
  285.         resolveToken.mint(msg.sender, mintedResolves);
  286.  
  287.         // update weighted average cashout time
  288.         avgFactor_releaseTimeSum = releaseTimeSum;
  289.         avgFactor_releaseWeight = releaseWeight;
  290.  
  291.         // reduce the amount of "eth spent" based on the percentage of bonds being sold back into the contract
  292.         avgFactor_ethSpent[msg.sender] -= initialInput_ETH;
  293.         // reduce the "buyInTime" sum that's used for average buy in time
  294.         avgFactor_buyInTimeSum[msg.sender] = avgFactor_buyInTimeSum[msg.sender] * (hodlBonds[msg.sender] - amount) / hodlBonds[msg.sender];
  295.        
  296.         // calculate the fee
  297.         uint fee = fluxFee(numEthersBeforeFee);
  298.  
  299.         // Net Ether for the seller after the fee has been subtracted.
  300.         uint numEthers = numEthersBeforeFee - fee;
  301.  
  302.         //updating the numerator of the fee-easing factor
  303.         sellSum += initialInput_ETH;
  304.  
  305.         // Burn the bonds which were just sold from the total supply.
  306.         _totalSupply -= amount;
  307.  
  308.         // Remove the bonds from the balance of the buyer.
  309.         hodlBonds[msg.sender] -= amount;
  310.  
  311.  
  312.         // Check if we have bonds in existence
  313.         uint resolveFee;
  314.         if (_totalSupply > 0 && dissolvingResolves > 0){
  315.             // Scale the Ether taken as the selling fee by the scaleFactor variable.
  316.             resolveFee = fee * scaleFactor;
  317.  
  318.             // Fee is distributed to all remaining resolve holders.
  319.             // rewardPerResolve is the amount gained per resolve thanks to this sell.
  320.             uint rewardPerResolve = resolveFee/dissolvingResolves;
  321.  
  322.             // The Ether value per resolve is increased proportionally.
  323.             earningsPerResolve += rewardPerResolve;
  324.         }
  325.        
  326.         // Send the ethereum to the address that requested the sell.
  327.         contractBalance -= numEthers;
  328.         msg.sender.transfer(numEthers);
  329.         emit Sell( msg.sender, amount, numEthers, mintedResolves, resolveFee, initialInput_ETH);
  330.         return (numEthers, mintedResolves);
  331.     }
  332.  
  333.     // Dynamic value of Ether in reserve, according to the CRR requirement.
  334.     function reserve() public view returns (uint256 amount) {
  335.         return SafeMath.sub( balance(),  (uint256) ((int256) (earningsPerResolve * dissolvingResolves) - totalPayouts) / scaleFactor );
  336.     }
  337.     function balance() internal view returns (uint256 amount) {
  338.         // msg.value is the amount of Ether sent by the transaction.
  339.         return contractBalance - msg.value;
  340.     }
  341.  
  342.     // Calculates the number of bonds that can be bought for a given amount of Ether, according to the
  343.     // dynamic reserve and _totalSupply values (derived from the buy and sell prices).
  344.     function getBondsForEther(uint256 ethervalue) public view returns (uint256 bonds) {
  345.         return SafeMath.sub(fixedExp( fixedLog( reserve() + ethervalue ) * crr_n/crr_d + price_coeff ) , _totalSupply);
  346.     }
  347.  
  348.     // Semantically similar to getBondsForEther, but subtracts the callers balance from the amount of Ether returned for conversion.
  349.     function calculateBondsFromReinvest(uint256 ethervalue, uint256 subvalue) public view returns (uint256 bondTokens) {
  350.         return SafeMath.sub(fixedExp(fixedLog(SafeMath.sub(reserve() , subvalue) + ethervalue)*crr_n/crr_d + price_coeff) , _totalSupply);
  351.     }
  352.  
  353.     // Converts a number bonds into an Ether value.
  354.     function getEtherForBonds(uint256 bondTokens) public view returns (uint256 ethervalue) {
  355.         // How much reserve Ether do we have left in the contract?
  356.         uint reserveAmount = reserve();
  357.  
  358.         // If you're the Highlander (or bagholder), you get The Prize. Everything left in the vault.
  359.         if (bondTokens == _totalSupply)
  360.             return reserveAmount;
  361.  
  362.         // If there would be excess Ether left after the transaction this is called within, return the Ether
  363.         // corresponding to the equation in Dr Jochen Hoenicke's original Ponzi paper, which can be found
  364.         // at https://test.jochen-hoenicke.de/eth/ponzitoken/ in the third equation, with the CRR numerator
  365.         // and denominator altered to 1 and 2 respectively.
  366.         return SafeMath.sub(reserveAmount, fixedExp( ( fixedLog(_totalSupply-bondTokens)-price_coeff ) * crr_d/crr_n) );
  367.     }
  368.  
  369.     // You don't care about these, but if you really do they're hex values for
  370.     // co-efficients used to simulate approximations of the log and exp functions.
  371.         int256  constant one        = 0x10000000000000000;
  372.         uint256 constant sqrt2      = 0x16a09e667f3bcc908;
  373.         uint256 constant sqrtdot5   = 0x0b504f333f9de6484;
  374.         int256  constant ln2        = 0x0b17217f7d1cf79ac;
  375.         int256  constant ln2_64dot5 = 0x2cb53f09f05cc627c8;
  376.         int256  constant c1         = 0x1ffffffffff9dac9b;
  377.         int256  constant c3         = 0x0aaaaaaac16877908;
  378.         int256  constant c5         = 0x0666664e5e9fa0c99;
  379.         int256  constant c7         = 0x049254026a7630acf;
  380.         int256  constant c9         = 0x038bd75ed37753d68;
  381.         int256  constant c11        = 0x03284a0c14610924f;
  382.  
  383.     // The polynomial R = c1*x + c3*x^3 + ... + c11 * x^11
  384.     // approximates the function log(1+x)-log(1-x)
  385.     // Hence R(s) = log((1+s)/(1-s)) = log(a)
  386.     function fixedLog(uint256 a) internal pure returns (int256 log) {
  387.         int32 scale = 0;
  388.         while (a > sqrt2) {
  389.             a /= 2;
  390.             scale++;
  391.         }
  392.         while (a <= sqrtdot5) {
  393.             a *= 2;
  394.             scale--;
  395.         }
  396.         int256 s = (((int256)(a) - one) * one) / ((int256)(a) + one);
  397.         int z = (s*s) / one;
  398.         return scale * ln2 +
  399.             (s*(c1 + (z*(c3 + (z*(c5 + (z*(c7 + (z*(c9 + (z*c11/one))
  400.                 /one))/one))/one))/one))/one);
  401.     }
  402.  
  403.     int256 constant c2 =  0x02aaaaaaaaa015db0;
  404.     int256 constant c4 = -0x000b60b60808399d1;
  405.     int256 constant c6 =  0x0000455956bccdd06;
  406.     int256 constant c8 = -0x000001b893ad04b3a;
  407.  
  408.     // The polynomial R = 2 + c2*x^2 + c4*x^4 + ...
  409.     // approximates the function x*(exp(x)+1)/(exp(x)-1)
  410.     // Hence exp(x) = (R(x)+x)/(R(x)-x)
  411.     function fixedExp(int256 a) internal pure returns (uint256 exp) {
  412.         int256 scale = (a + (ln2_64dot5)) / ln2 - 64;
  413.         a -= scale*ln2;
  414.         int256 z = (a*a) / one;
  415.         int256 R = ((int256)(2) * one) +
  416.             (z*(c2 + (z*(c4 + (z*(c6 + (z*c8/one))/one))/one))/one);
  417.         exp = (uint256) (((R + a) * one) / (R - a));
  418.         if (scale >= 0)
  419.             exp <<= scale;
  420.         else
  421.             exp >>= -scale;
  422.         return exp;
  423.     }
  424.  
  425.     // This allows you to buy bonds by sending Ether directly to the smart contract
  426.     // without including any transaction data (useful for, say, mobile wallet apps).
  427.     function () payable external {
  428.         // msg.value is the amount of Ether sent by the transaction.
  429.         if (msg.value > 0) {
  430.             fund();
  431.         } else {
  432.             withdraw( resolveEarnings(msg.sender) );
  433.         }
  434.     }
  435.  
  436.     // Allow contract to accept resolve tokens
  437.     event StakeResolves( address indexed addr, uint256 amountStaked, bytes _data );
  438.     function tokenFallback(address from, uint value, bytes calldata _data) external{
  439.         if(msg.sender == address(resolveToken) ){
  440.             resolveWeight[from] += value;
  441.             dissolvingResolves += value;
  442.  
  443.             // Update the payout array so that the "resolve shareholder" cannot claim resolveEarnings on previous staked resolves.
  444.             int payoutDiff  = (int256) (earningsPerResolve * value);
  445.  
  446.             // Then we update the payouts array for the "resolve shareholder" with this amount
  447.             payouts[from] += payoutDiff;
  448.  
  449.             emit StakeResolves(from, value, _data);
  450.         }else{
  451.             revert("no want");
  452.         }
  453.     }
  454.  
  455.  
  456.     // Withdraws resolveEarnings held by the caller sending the transaction, updates
  457.     // the requisite global variables, and transfers Ether back to the caller.
  458.     event Withdraw( address indexed addr, uint256 earnings, uint256 dissolve );
  459.     function withdraw(uint amount) public returns(uint){
  460.         // Retrieve the resolveEarnings associated with the address the request came from.
  461.         uint totalEarnings = resolveEarnings(msg.sender);
  462.         require(amount <= totalEarnings, "the amount exceeds total earnings");
  463.         uint oldWeight = resolveWeight[msg.sender];
  464.         resolveWeight[msg.sender] = oldWeight * (totalEarnings - amount) / totalEarnings;
  465.         uint weightDiff = oldWeight - resolveWeight[msg.sender];
  466.         dissolved += weightDiff;
  467.         dissolvingResolves -= weightDiff;
  468.  
  469.         //something about invariance
  470.         int resolvePayoutDiff  = (int256) (earningsPerResolve * weightDiff);
  471.  
  472.         payouts[msg.sender] += resolvePayoutDiff;
  473.  
  474.         // Increase the total amount that's been paid out to maintain invariance.
  475.         totalPayouts += resolvePayoutDiff;
  476.         contractBalance -= amount;
  477.  
  478.         // Send the resolveEarnings to the address that requested the withdraw.
  479.         msg.sender.transfer(amount);
  480.         emit Withdraw( msg.sender, amount, weightDiff);
  481.         return weightDiff;
  482.     }
  483.     event PullResolves( address indexed addr, uint256 pulledResolves, uint256 forfeiture);
  484.     function pullResolves(uint amount) public{
  485.         require(amount <= resolveWeight[msg.sender], "that amount is too large");
  486.         require(amount != dissolvingResolves, "you can't forfeit the last amount");
  487.         //something about invariance
  488.         uint forfeitedEarnings  =  amount * earningsPerResolve;
  489.  
  490.         // Update the payout array so that the "resolve shareholder" cannot claim resolveEarnings on previous staked resolves.
  491.  
  492.         // Then we update the payouts array for the "resolve shareholder" with this amount
  493.         payouts[msg.sender] -= (int256) (earningsPerResolve * amount);
  494.  
  495.         resolveWeight[msg.sender] -= amount;
  496.         dissolvingResolves -= amount;
  497.         // The Ether value per token is increased proportionally.
  498.         earningsPerResolve += forfeitedEarnings /dissolvingResolves;
  499.         resolveToken.transfer(msg.sender, amount);
  500.         emit PullResolves( msg.sender, amount, forfeitedEarnings / scaleFactor);
  501.     }
  502.  
  503.     event BondTransfer(address from, address to, uint amount);
  504.     function bondTransfer( address to, uint amount ) public{
  505.         //attack someone's resolve potential by sending them some love
  506.         address sender = msg.sender;
  507.         uint totalBonds = hodlBonds[sender];
  508.         require(amount <= totalBonds, "amount exceeds hodlBonds");
  509.         uint ethSpent = avgFactor_ethSpent[sender] * amount / totalBonds;
  510.         uint buyInTimeSum = avgFactor_buyInTimeSum[sender] * amount / totalBonds;
  511.         avgFactor_ethSpent[sender] -= ethSpent;
  512.         avgFactor_buyInTimeSum[sender] -= buyInTimeSum;
  513.         hodlBonds[sender] -= amount;
  514.         avgFactor_ethSpent[to] += ethSpent;
  515.         avgFactor_buyInTimeSum[to] += buyInTimeSum;
  516.         hodlBonds[to] += amount;
  517.         emit BondTransfer(sender, to, amount);
  518.     }
  519. }
  520.  
  521. contract ERC223ReceivingContract{
  522.     function tokenFallback(address _from, uint _value, bytes calldata _data) external;
  523. }
  524.  
  525. contract ResolveToken{
  526.     address pyramid;
  527.  
  528.     constructor(address _pyramid) public{
  529.         pyramid = _pyramid;
  530.     }
  531.  
  532.     modifier pyramidOnly{
  533.       require(msg.sender == pyramid);
  534.       _;
  535.     }
  536.  
  537.     event Transfer(
  538.         address indexed from,
  539.         address indexed to,
  540.         uint256 amount,
  541.         bytes data
  542.     );
  543.  
  544.     event Mint(
  545.         address indexed addr,
  546.         uint256 amount
  547.     );
  548.  
  549.     mapping(address => uint) balances;
  550.     mapping(address => mapping(address => uint)) approvals;
  551.  
  552.     string public name = "Resolve";
  553.     string public symbol = "`r";
  554.     uint8 constant public decimals = 18;
  555.     uint256 private _totalSupply;
  556.  
  557.     function totalSupply() public view returns (uint256) {
  558.         return _totalSupply;
  559.     }
  560.     function mint(address _address, uint _value) public pyramidOnly(){
  561.         balances[_address] += _value;
  562.         _totalSupply += _value;
  563.         emit Mint(_address, _value);
  564.     }
  565.  
  566.     // Function that is called when a user or another contract wants to transfer funds .
  567.     function transfer(address _to, uint _value, bytes memory _data) public returns (bool success) {
  568.         if (balanceOf(msg.sender) < _value) revert();
  569.         if(isContract(_to)) {
  570.             return transferToContract(_to, _value, _data);
  571.         }else{
  572.             return transferToAddress(_to, _value, _data);
  573.         }
  574.     }
  575.  
  576.     // Standard function transfer similar to ERC20 transfer with no _data .
  577.     // Added due to backwards compatibility reasons .
  578.     function transfer(address _to, uint _value) public returns (bool success) {
  579.         if (balanceOf(msg.sender) < _value) revert();
  580.         //standard function transfer similar to ERC20 transfer with no _data
  581.         //added due to backwards compatibility reasons
  582.         bytes memory empty;
  583.         if(isContract(_to)){
  584.             return transferToContract(_to, _value, empty);
  585.         }else{
  586.             return transferToAddress(_to, _value, empty);
  587.         }
  588.     }
  589.  
  590.     //assemble the given address bytecode. If bytecode exists then the _addr is a contract.
  591.     function isContract(address _addr) public view returns (bool is_contract) {
  592.         uint length;
  593.         assembly {
  594.             //retrieve the size of the code on target address, this needs assembly
  595.             length := extcodesize(_addr)
  596.         }
  597.         if(length>0) {
  598.             return true;
  599.         }else {
  600.             return false;
  601.         }
  602.     }
  603.  
  604.     //function that is called when transaction target is an address
  605.     function transferToAddress(address _to, uint _value, bytes memory _data) private returns (bool success) {
  606.         moveTokens(msg.sender,_to,_value);
  607.         emit Transfer(msg.sender, _to, _value, _data);
  608.         return true;
  609.     }
  610.  
  611.     //function that is called when transaction target is a contract
  612.     function transferToContract(address _to, uint _value, bytes memory _data) private returns (bool success) {
  613.         moveTokens(msg.sender, _to, _value);
  614.         ERC223ReceivingContract reciever = ERC223ReceivingContract(_to);
  615.         reciever.tokenFallback(msg.sender, _value, _data);
  616.         emit Transfer(msg.sender, _to, _value, _data);
  617.         return true;
  618.     }
  619.  
  620.     function moveTokens(address _from, address _to, uint _amount) private{
  621.         balances[_from] -= _amount;
  622.         balances[_to] += _amount;
  623.     }
  624.  
  625.     function balanceOf(address _owner) public view returns (uint balance) {
  626.         return balances[_owner];
  627.     }
  628.  
  629.     function allowance(address src, address guy) public view returns (uint) {
  630.         return approvals[src][guy];
  631.     }
  632.  
  633.     function transferFrom(address src, address dst, uint wad) public returns (bool){
  634.         require(approvals[src][msg.sender] >=  wad, "That amount is not approved");
  635.         require(balances[src] >=  wad, "That amount is not available from this wallet");
  636.         if (src != msg.sender) {
  637.             approvals[src][msg.sender] -=  wad;
  638.         }
  639.         moveTokens(src,dst,wad);
  640.  
  641.         bytes memory empty;
  642.         emit Transfer(src, dst, wad, empty);
  643.  
  644.         return true;
  645.     }
  646.  
  647.     function approve(address guy, uint wad) public returns (bool) {
  648.         approvals[msg.sender][guy] = wad;
  649.  
  650.         emit Approval(msg.sender, guy, wad);
  651.  
  652.         return true;
  653.     }
  654.  
  655.     event Approval(address indexed src, address indexed guy, uint wad);
  656. }
  657.  
  658. /**
  659.  * @title SafeMath
  660.  * @dev Math operations with safety checks that throw on error
  661.  */
  662. library SafeMath {
  663.     /**
  664.     * @dev Substracts two numbers, throws on overflow (i.e. if subtrahend is greater than minuend).
  665.     */
  666.     function sub(uint256 a, uint256 b) internal pure returns (uint256) {
  667.         assert(b <= a);
  668.         return a - b;
  669.     }
  670. }
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