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Hidden cap commitment mechanism

This commit is contained in:
Jorge Izquierdo 2017-04-19 18:53:15 +02:00
parent 301bd0cdc7
commit 2d4581ca80
1 changed files with 37 additions and 5 deletions
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42
contracts/AragonTokenSale.sol
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@ -20,6 +20,7 @@ contract AragonTokenSale is Controller, SafeMath {
uint8 public priceStages; // Number of different price stages for interpolating between initialPrice and finalPrice
address public aragonDevMultisig; // The address to hold the funds donated
address public communityMultisig; // Community trusted multisig to deploy network
bytes32 public capCommitment;
uint public totalCollected = 0; // In wei
bool public saleStopped = false; // Has Aragon Dev stopped the sale?
@ -75,7 +76,8 @@ Price increases by the same delta in every stage change
address _communityMultisig,
uint256 _initialPrice,
uint256 _finalPrice,
uint8 _priceStages
uint8 _priceStages,
bytes32 _capCommitment
)
non_zero_address(_aragonDevMultisig)
non_zero_address(_communityMultisig)
@ -85,6 +87,7 @@ Price increases by the same delta in every stage change
if (_initialPrice <= _finalPrice) throw;
if (_priceStages < 1) throw;
if (_priceStages > _initialPrice - _finalPrice) throw;
if (uint(_capCommitment) == 0) throw;
// Save constructor arguments as global variables
initialBlock = _initialBlock;
@ -94,6 +97,7 @@ Price increases by the same delta in every stage change
initialPrice = _initialPrice;
finalPrice = _finalPrice;
priceStages = _priceStages;
capCommitment = _capCommitment;
}
// @notice Deploy ANT is called only once to setup all the needed contracts.
@ -250,7 +254,7 @@ Price increases by the same delta in every stage change
uint256 boughtTokens = safeMul(msg.value, getPrice(getBlockNumber())); // Calculate how many tokens bought
if (!aragonDevMultisig.send(msg.value)) throw; // Send funds to multisig
if (!token.generateTokens(_owner, boughtTokens)) throw; // Allocate tokens
if (!token.generateTokens(_owner, boughtTokens)) throw; // Allocate tokens. This will fail after sale is finalized in case it is hidden cap finalized.
totalCollected = safeAdd(totalCollected, msg.value); // Save total collected amount
@ -277,12 +281,26 @@ Price increases by the same delta in every stage change
saleStopped = false;
}
function revealCap(uint256 _cap, uint256 _cap_secure)
only_during_sale_period
only_sale_activated {
if (totalCollected < _cap) throw;
doFinalizeSale(_cap, _cap_secure); // cap will be checked on finalize sale
}
// @notice Finalizes sale generating the tokens for Aragon Dev.
// @dev Transfers the token controller power to the ANPlaceholder.
function finalizeSale()
function finalizeSale(uint256 _cap, uint256 _cap_secure)
only_after_sale
only(aragonDevMultisig) {
doFinalizeSale(_cap, _cap_secure);
}
function doFinalizeSale(uint256 _cap, uint256 _cap_secure)
verify_cap(_cap, _cap_secure)
internal {
// Doesn't check if saleStopped is false, because sale could end in a emergency stop.
// This function cannot be successfully called twice, because it will top being the controller,
// and the generateTokens call will fail if called again.
@ -292,7 +310,8 @@ Price increases by the same delta in every stage change
if (!token.generateTokens(aragonDevMultisig, aragonTokens)) throw;
token.changeController(networkPlaceholder); // Sale loses token controller power in favor of network placeholder
saleFinalized = true; // Set stop is true which will enable network deployment
saleFinalized = true; // Set stop is true which will enable network deployment
saleStopped = true;
}
// @notice Deploy Aragon Network contract.
@ -324,11 +343,24 @@ Price increases by the same delta in every stage change
return block.number;
}
function computeCap(uint256 _cap, uint256 _cap_secure) constant returns (bytes32) {
return sha3(_cap, _cap_secure);
}
function isValidCap(uint256 _cap, uint256 _cap_secure) constant returns (bool) {
return computeCap(_cap, _cap_secure) == capCommitment;
}
modifier only(address x) {
if (msg.sender != x) throw;
_;
}
modifier verify_cap(uint256 _cap, uint256 _cap_secure) {
if (!isValidCap(_cap, _cap_secure)) throw;
_;
}
modifier only_before_sale {
if (getBlockNumber() >= initialBlock) throw;
_;