status-im
/
discover-dapps
mirror of https://github.com/status-im/discover-dapps.git
2
0
Fork 0
Code Issues Projects Releases Wiki Activity

Changes all arithmetic operations to safeMath

This commit is contained in:
Andy Tudhope 2019-04-19 22:15:02 +02:00
parent ecc0d25676
commit 8c016eb926
No known key found for this signature in database
GPG Key ID: 02A3DFA93BF26AD2
1 changed files with 36 additions and 36 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

72
contracts/Discover.sol
View File

@ -59,9 +59,9 @@ contract Discover is ApproveAndCallFallBack, BancorFormula {
decimals = 1000000; // 4 decimal points for %, 2 because we only use 1/100th of total in circulation
max = (total * ceiling) / decimals;
max = total.mul(ceiling).div(decimals);
safeMax = 77 * max / 100; // Limited by accuracy of BancorFormula
safeMax = uint(77).mul(max).div(100); // Limited by accuracy of BancorFormula
}
/**
@ -115,9 +115,9 @@ contract Discover is ApproveAndCallFallBack, BancorFormula {
uint precision;
uint result;
d.balance = d.balance - _amount;
d.rate = decimals - (d.balance * decimals/max);
d.available = d.balance * d.rate;
d.balance = d.balance.sub(_amount);
d.rate = decimals.sub(d.balance.mul(decimals).div(max));
d.available = d.balance.mul(d.rate);
(result, precision) = BancorFormula.power(
d.available,
@ -130,11 +130,11 @@ contract Discover is ApproveAndCallFallBack, BancorFormula {
d.votesCast = d.votesMinted;
}
uint temp1 = d.votesCast * d.rate * d.available;
uint temp2 = d.votesMinted * decimals * decimals;
uint effect = temp1 / temp2;
uint temp1 = d.votesCast.mul(d.rate).mul(d.available);
uint temp2 = d.votesMinted.mul(decimals).mul(decimals);
uint effect = temp1.div(temp2);
d.effectiveBalance = d.balance - effect;
d.effectiveBalance = d.balance.sub(effect);
require(SNT.transfer(d.developer, _amount), "Transfer failed");
@ -206,7 +206,7 @@ contract Discover is ApproveAndCallFallBack, BancorFormula {
uint dappIdx = id2index[_id];
Data memory d = dapps[dappIdx];
require(d.id == _id, "Error fetching correct data");
require(d.balance + _amount <= safeMax, "You cannot upvote by this much, try with a lower amount");
require(d.balance.add(_amount) <= safeMax, "You cannot upvote by this much, try with a lower amount");
// Special case - no downvotes yet cast
if (d.votesCast == 0) {
@ -216,9 +216,9 @@ contract Discover is ApproveAndCallFallBack, BancorFormula {
uint precision;
uint result;
uint mBalance = d.balance + _amount;
uint mRate = decimals - (mBalance * decimals/max);
uint mAvailable = mBalance * mRate;
uint mBalance = d.balance.add(_amount);
uint mRate = decimals.sub(mBalance.mul(decimals).div(max));
uint mAvailable = mBalance.mul(mRate);
(result, precision) = BancorFormula.power(
mAvailable,
@ -228,13 +228,13 @@ contract Discover is ApproveAndCallFallBack, BancorFormula {
uint mVMinted = result >> precision;
uint temp1 = d.votesCast * mRate * mAvailable;
uint temp2 = mVMinted * decimals * decimals;
uint mEffect = temp1 / temp2;
uint temp1 = d.votesCast.mul(mRate).mul(mAvailable);
uint temp2 = mVMinted.mul(decimals).mul(decimals);
uint mEffect = temp1.div(temp2);
uint mEBalance = mBalance - mEffect;
uint mEBalance = mBalance.sub(mEffect);
return (mEBalance - d.effectiveBalance);
return (mEBalance.sub(d.effectiveBalance));
}
/**
@ -247,11 +247,11 @@ contract Discover is ApproveAndCallFallBack, BancorFormula {
Data memory d = dapps[dappIdx];
require(d.id == _id, "Error fetching correct data");
uint balanceDownBy = (d.effectiveBalance / 100);
uint votesRequired = (balanceDownBy * d.votesMinted * d.rate) / d.available;
uint votesAvailable = d.votesMinted - d.votesCast - votesRequired;
uint temp = (d.available / votesAvailable) * (votesRequired);
uint cost = temp / decimals;
uint balanceDownBy = (d.effectiveBalance.div(100));
uint votesRequired = (balanceDownBy.mul(d.votesMinted).mul(d.rate)).div(d.available);
uint votesAvailable = d.votesMinted.sub(d.votesCast).sub(votesRequired);
uint temp = (d.available.div(votesAvailable)).mul(votesRequired);
uint cost = temp.div(decimals);
return (balanceDownBy, votesRequired, cost);
}
@ -281,8 +281,8 @@ contract Discover is ApproveAndCallFallBack, BancorFormula {
uint result;
d.balance = _amount;
d.rate = decimals - (d.balance * decimals/max);
d.available = d.balance * d.rate;
d.rate = decimals.sub((d.balance).mul(decimals).div(max));
d.available = d.balance.mul(d.rate);
(result, precision) = BancorFormula.power(
d.available,
@ -310,14 +310,14 @@ contract Discover is ApproveAndCallFallBack, BancorFormula {
Data storage d = dapps[dappIdx];
require(d.id == _id, "Error fetching correct data");
require(d.balance + _amount <= safeMax, "You cannot upvote by this much, try with a lower amount");
require(d.balance.add(_amount) <= safeMax, "You cannot upvote by this much, try with a lower amount");
uint precision;
uint result;
d.balance = d.balance + _amount;
d.rate = decimals - (d.balance * decimals/max);
d.available = d.balance * d.rate;
d.balance = d.balance.add(_amount);
d.rate = decimals.sub((d.balance).mul(decimals).div(max));
d.available = d.balance.mul(d.rate);
(result, precision) = BancorFormula.power(
d.available,
@ -327,11 +327,11 @@ contract Discover is ApproveAndCallFallBack, BancorFormula {
d.votesMinted = result >> precision;
uint temp1 = d.votesCast * d.rate * d.available;
uint temp2 = d.votesMinted * decimals * decimals;
uint effect = temp1 / temp2;
uint temp1 = d.votesCast.mul(d.rate).mul(d.available);
uint temp2 = d.votesMinted.mul(decimals).mul(decimals);
uint effect = temp1.div(temp2);
d.effectiveBalance = d.balance - effect;
d.effectiveBalance = d.balance.sub(effect);
require(SNT.allowance(_from, address(this)) >= _amount, "Not enough SNT allowance");
require(SNT.transferFrom(_from, address(this), _amount), "Transfer failed");
@ -348,9 +348,9 @@ contract Discover is ApproveAndCallFallBack, BancorFormula {
require(_amount == c, "Incorrect amount: valid iff effect on ranking is 1%");
d.available = d.available - _amount;
d.votesCast = d.votesCast + vR;
d.effectiveBalance = d.effectiveBalance - b;
d.available = d.available.sub(_amount);
d.votesCast = d.votesCast.add(vR);
d.effectiveBalance = d.effectiveBalance.sub(b);
require(SNT.allowance(_from, address(this)) >= _amount, "Not enough SNT allowance");
require(SNT.transferFrom(_from, address(this), _amount), "Transfer failed");