d-bis/dodo-contractV2
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support k = 0 case

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mingda
2020-11-30 11:59:55 +08:00
parent 196d424e5a
commit 2323ccb6eb
1 changed files with 14 additions and 1 deletions
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15
contracts/lib/DODOMath.sol
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@@ -29,6 +29,8 @@ library DODOMath {
i is the price of res-V trading pair i is the price of res-V trading pair
support k=1 & k=0 case
[round down] [round down]
*/ */
function _GeneralIntegrate( function _GeneralIntegrate(
@@ -53,6 +55,8 @@ library DODOMath {
i is the price of delta-V trading pair i is the price of delta-V trading pair
give out target of V give out target of V
support k=1 & k=0 case
[round down] [round down]
*/ */
function _SolveQuadraticFunctionForTarget( function _SolveQuadraticFunctionForTarget(
@@ -60,7 +64,10 @@ library DODOMath {
uint256 delta, uint256 delta,
uint256 i, uint256 i,
uint256 k uint256 k
) internal pure returns (uint256 V0) { ) internal pure returns (uint256) {
if (k == 0) {
return V1.add(DecimalMath.mulFloor(i, delta));
}
// V0 = V1*(1+(sqrt-1)/2k) // V0 = V1*(1+(sqrt-1)/2k)
// sqrt = √(1+4kidelta/V1) // sqrt = √(1+4kidelta/V1)
// premium = 1+(sqrt-1)/2k // premium = 1+(sqrt-1)/2k
@@ -93,6 +100,8 @@ library DODOMath {
i is the price of delta-V trading pair i is the price of delta-V trading pair
support k=1 & k=0 case
[round down] [round down]
*/ */
function _SolveQuadraticFunctionForTrade( function _SolveQuadraticFunctionForTrade(
@@ -107,6 +116,10 @@ library DODOMath {
return 0; return 0;
} }
if (k == 0) {
return DecimalMath.mulFloor(i, delta);
}
if (k == DecimalMath.ONE) { if (k == DecimalMath.ONE) {
// if k==1 // if k==1
// Q2=Q1/(1+ideltaBQ1/Q0/Q0) // Q2=Q1/(1+ideltaBQ1/Q0/Q0)