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add minimum liquidity

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This commit is contained in:
owen05
2020-12-09 00:06:48 +08:00
parent e8d83b947b
commit ca692ee548
1 changed files with 3 additions and 1 deletions
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contracts/DODOVendingMachine/impl/DVMFunding.sol
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@@ -50,7 +50,8 @@ contract DVMFunding is DVMVault {
// 在提币的时候向下取整。因此永远不会出现，balance为0但totalsupply不为0的情况 // 在提币的时候向下取整。因此永远不会出现，balance为0但totalsupply不为0的情况
// 但有可能出现，reserve>0但totalSupply=0的场景 // 但有可能出现，reserve>0但totalSupply=0的场景
if (totalSupply == 0) { if (totalSupply == 0) {
shares = baseBalance; // 以免出现balance很大但shares很小的情况 shares = baseBalance.sub(10**3); // 以免出现balance很大但shares很小的情况
_mint(address(0), 10**3);
} else if (baseReserve > 0 && quoteReserve == 0) { } else if (baseReserve > 0 && quoteReserve == 0) {
// case 2. supply when quote reserve is 0 // case 2. supply when quote reserve is 0
shares = baseInput.mul(totalSupply).div(baseReserve); shares = baseInput.mul(totalSupply).div(baseReserve);
@@ -61,6 +62,7 @@ contract DVMFunding is DVMVault {
uint256 mintRatio = quoteInputRatio < baseInputRatio ? quoteInputRatio : baseInputRatio; uint256 mintRatio = quoteInputRatio < baseInputRatio ? quoteInputRatio : baseInputRatio;
shares = DecimalMath.mulFloor(totalSupply, mintRatio); shares = DecimalMath.mulFloor(totalSupply, mintRatio);
} }
require(shares > 0, 'INSUFFICIENT_LIQUIDITY_MINED');
_mint(to, shares); _mint(to, shares);
_sync(); _sync();
emit BuyShares(to, shares, _SHARES_[to]); emit BuyShares(to, shares, _SHARES_[to]);