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Merge pull request #50 from Giveth/GriffGreen-patch-1 

Updated Comments... still not done :-(
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perissology 2017-12-11 19:45:59 +00:00 committed by GitHub
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182
contracts/LiquidPledging.sol
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@ -2,7 +2,8 @@ pragma solidity ^0.4.11;
/*
Copyright 2017, Jordi Baylina
Contributor: Adrià Massanet <adria@codecontext.io>
Contributors: Adrià Massanet <adria@codecontext.io>, RJ Ewing, Griff
Green, Arthur Lunn
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
@ -18,7 +19,6 @@ pragma solidity ^0.4.11;
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
// Contract Imports
import "./LiquidPledgingBase.sol";
/// @dev `LiquidPleding` allows for liquid pledging through the use of
@ -40,33 +40,30 @@ contract LiquidPledging is LiquidPledgingBase {
function LiquidPledging(address _vault) LiquidPledgingBase(_vault) {
}
/// @notice This is how value enters into the system which creates pledges;
/// the token of value goes into the vault and the amount in the pledge
/// relevant to this Giver without delegates is increased, and a normal
/// transfer is done to the idReceiver
/// @param idGiver Identifier of the giver thats donating.
/// @param idReceiver To whom it's transfered. Can be the same giver,
/// another giver, a delegate or a project.
/// @notice This is how value enters the system and how pledges are created;
/// the ether is sent to the vault, an pledge for the Giver is created (or
/// found), the amount of ETH donated in wei is added to the `amount` in
/// the Giver's Pledge, and an LP transfer is done to the idReceiver for
/// the full amount
/// @param idGiver The id of the Giver donating; if 0, a new id is created
/// @param idReceiver The Admin receiving the donation; can be any Admin:
/// the Giver themselves, another Giver, a Delegate or a Project
function donate(uint64 idGiver, uint64 idReceiver) payable {
if (idGiver == 0) {
// default to 3 day commitTime
// default to a 3 day (259200 seconds) commitTime
idGiver = addGiver("", "", 259200, ILiquidPledgingPlugin(0x0));
}
PledgeAdmin storage sender = findAdmin(idGiver);
checkAdminOwner(sender);
require(sender.adminType == PledgeAdminType.Giver);
uint amount = msg.value;
require(amount > 0);
vault.transfer(amount); // transfers the baseToken to the Vault
vault.transfer(amount); // Sends the `msg.value` (in wei) to the `vault`
uint64 idPledge = findOrCreatePledge(
idGiver,
new uint64[](0), //what is new?
new uint64[](0), // Creates empty array for delegationChain
0,
0,
0,
@ -77,29 +74,26 @@ contract LiquidPledging is LiquidPledgingBase {
Pledge storage nTo = findPledge(idPledge);
nTo.amount += amount;
Transfer(0, idPledge, amount);
Transfer(0, idPledge, amount); // An event
transfer(idGiver, idPledge, amount, idReceiver);
transfer(idGiver, idPledge, amount, idReceiver); // LP accounting
}
/// @notice Moves value between pledges
/// @param idSender ID of the giver, delegate or project admin that is
/// transferring the funds from Pledge to Pledge; this admin must have
/// permissions to move the value
/// @notice Transfers amounts between pledges for internal accounting
/// @param idSender Id of the Admin that is transferring the amount from
/// Pledge to Pledge; this admin must have permissions to move the value
/// @param idPledge Id of the pledge that's moving the value
/// @param amount Quantity of value that's being moved
/// @param idReceiver Destination of the value, can be a giver sending to
/// a giver or a delegate, a delegate to another delegate or a project
/// to pre-commit it to that project if called from a delegate,
/// or to commit it to the project if called from the owner.
/// @param amount Quantity of ETH (in wei) that this pledge is transferring
/// the authority to withdraw from the vault
/// @param idReceiver Destination of the `amount`, can be a Giver/Project sending
/// to a Giver, a Delegate or a Project; a Delegate sending to another
/// Delegate, or a Delegate pre-commiting it to a Project
function transfer(
uint64 idSender,
uint64 idPledge,
uint amount,
uint64 idReceiver
)
{
){
idPledge = normalizePledge(idPledge);
@ -110,8 +104,9 @@ contract LiquidPledging is LiquidPledgingBase {
checkAdminOwner(sender);
require(p.pledgeState == PledgeState.Pledged);
// If the sender is the owner
// If the sender is the owner of the Pledge
if (p.owner == idSender) {
if (receiver.adminType == PledgeAdminType.Giver) {
transferOwnershipToGiver(idPledge, amount, idReceiver);
} else if (receiver.adminType == PledgeAdminType.Project) {
@ -124,29 +119,30 @@ contract LiquidPledging is LiquidPledgingBase {
);
appendDelegate(idPledge, amount, idReceiver);
} else {
// This should never be reached as the reciever.adminType
// should always be either a Giver, Project, or Delegate
assert(false);
}
return;
}
// If the sender is a delegate
// If the sender is a Delegate
uint senderDIdx = getDelegateIdx(p, idSender);
if (senderDIdx != NOTFOUND) {
// If the receiver is another giver
// And the receiver is another Giver
if (receiver.adminType == PledgeAdminType.Giver) {
// Only accept to change to the original giver to
// remove all delegates
// Only transfer to the Giver who owns the pldege
assert(p.owner == idReceiver);
undelegate(idPledge, amount, p.delegationChain.length);
return;
}
// If the receiver is another delegate
// And the receiver is another Delegate
if (receiver.adminType == PledgeAdminType.Delegate) {
uint receiverDIdx = getDelegateIdx(p, idReceiver);
// If the receiver is not in the delegate list
// And not in the delegationChain
if (receiverDIdx == NOTFOUND) {
idPledge = undelegate(
idPledge,
@ -155,10 +151,9 @@ contract LiquidPledging is LiquidPledgingBase {
);
appendDelegate(idPledge, amount, idReceiver);
// If the receiver is already part of the delegate chain and is
// after the sender, then all of the other delegates after the
// sender are removed and the receiver is appended at the
// end of the delegation chain
// And part of the delegationChain and is after the sender, then
// all of the other delegates after the sender are removed and
// the receiver is appended at the end of the delegationChain
} else if (receiverDIdx > senderDIdx) {
idPledge = undelegate(
idPledge,
@ -167,13 +162,10 @@ contract LiquidPledging is LiquidPledgingBase {
);
appendDelegate(idPledge, amount, idReceiver);
// If the receiver is already part of the delegate chain and is
// before the sender, then the sender and all of the other
// delegates after the RECEIVER are removed from the chain,
// this is interesting because the delegate is removed from the
// delegates that delegated to this delegate. Are there game theory
// issues? should this be allowed?
} else if (receiverDIdx <= senderDIdx) {
// And is already part of the delegate chain but is before the
// sender, then the sender and all of the other delegates after
// the RECEIVER are removed from the delegationChain
} else if (receiverDIdx <= senderDIdx) {//TODO Check for Game Theory issues (from Arthur) this allows the sender to sort of go komakosi and remove himself and the delegates between himself and the receiver... should this authority be allowed?
undelegate(
idPledge,
amount,
@ -183,8 +175,8 @@ contract LiquidPledging is LiquidPledgingBase {
return;
}
// If the delegate wants to support a project, they remove all
// the delegates after them in the chain and choose a project
// And the receiver is a Project, all the delegates after the sender
// are removed and the amount is pre-committed to the project
if (receiver.adminType == PledgeAdminType.Project) {
idPledge = undelegate(
idPledge,
@ -195,23 +187,19 @@ contract LiquidPledging is LiquidPledgingBase {
return;
}
}
assert(false); // It is not the owner nor any delegate.
assert(false); // When the sender is not an owner or a delegate
}
/// @notice This method is used to withdraw value from the system.
/// This can be used by the givers withdraw any un-commited donations.
/// @param idPledge Id of the pledge that wants to be withdrawn.
/// @param amount Quantity of Ether that wants to be withdrawn.
/// @notice Authorizes a payment be made from the `vault` can be used by the
/// Giver to veto a pre-committed donation from a Delegate to an
/// intendedProject
/// @param idPledge Id of the pledge that is to be redeemed into ether
/// @param amount Quantity of ether (in wei) to be authorized
function withdraw(uint64 idPledge, uint amount) {
idPledge = normalizePledge(idPledge);
idPledge = normalizePledge(idPledge); // Updates pledge info
Pledge storage p = findPledge(idPledge);
require(p.pledgeState == PledgeState.Pledged);
PledgeAdmin storage owner = findAdmin(p.owner);
checkAdminOwner(owner);
uint64 idNewPledge = findOrCreatePledge(
@ -228,9 +216,10 @@ contract LiquidPledging is LiquidPledgingBase {
vault.authorizePayment(bytes32(idNewPledge), owner.addr, amount);
}
/// @notice Method called by the vault to confirm a payment.
/// @param idPledge Id of the pledge that wants to be withdrawn.
/// @param amount Quantity of Ether that wants to be withdrawn.
/// @notice `onlyVault` Confirms a withdraw request changing the PledgeState
/// from Paying to Paid
/// @param idPledge Id of the pledge that is to be withdrawn
/// @param amount Quantity of ether (in wei) to be withdrawn
function confirmPayment(uint64 idPledge, uint amount) onlyVault {
Pledge storage p = findPledge(idPledge);
@ -248,13 +237,14 @@ contract LiquidPledging is LiquidPledgingBase {
doTransfer(idPledge, idNewPledge, amount);
}
/// @notice Method called by the vault to cancel a payment.
/// @param idPledge Id of the pledge that wants to be canceled for withdraw.
/// @param amount Quantity of Ether that wants to be rolled back.
/// @notice `onlyVault` Cancels a withdraw request, changing the PledgeState
/// from Paying back to Pledged
/// @param idPledge Id of the pledge that's withdraw is to be canceled
/// @param amount Quantity of ether (in wei) to be canceled
function cancelPayment(uint64 idPledge, uint amount) onlyVault {
Pledge storage p = findPledge(idPledge);
require(p.pledgeState == PledgeState.Paying); //TODO change to revert
require(p.pledgeState == PledgeState.Paying); //TODO change to revert????????????????????????????
// When a payment is canceled, never is assigned to a project.
uint64 oldPledge = findOrCreatePledge(
@ -271,8 +261,8 @@ contract LiquidPledging is LiquidPledgingBase {
doTransfer(idPledge, oldPledge, amount);
}
/// @notice Method called to cancel this project.
/// @param idProject Id of the projct that wants to be canceled.
/// @notice Changes the `project.canceled` flag to `true`; cannot be undone
/// @param idProject Id of the project that is to be canceled
function cancelProject(uint64 idProject) {
PledgeAdmin storage project = findAdmin(idProject);
checkAdminOwner(project);
@ -281,9 +271,11 @@ contract LiquidPledging is LiquidPledgingBase {
CancelProject(idProject);
}
/// @notice Method called to cancel specific pledge.
/// @param idPledge Id of the pledge that should be canceled.
/// @param amount Quantity of Ether that wants to be rolled back.
/// @notice Transfers `amount` in `idPledge` back to the `oldPledge` that
/// that sent it there in the first place, a Ctrl-z
/// @param idPledge Id of the pledge that is to be canceled
/// @param amount Quantity of ether (in wei) to be transfered to the
/// `oldPledge`
function cancelPledge(uint64 idPledge, uint amount) {
idPledge = normalizePledge(idPledge);
@ -306,19 +298,19 @@ contract LiquidPledging is LiquidPledgingBase {
// efficient (saves gas) than calling these functions in series
/// Bit mask used for dividing pledge amounts in Multi pledge methods
/// @dev Bitmask used for dividing pledge amounts in Multi pledge methods
uint constant D64 = 0x10000000000000000;
/// @notice `mTransfer` allows for multiple pledges to be transferred
/// efficiently
/// @param idSender ID of the giver, delegate or project admin that is
/// transferring the funds from Pledge to Pledge. This admin must have
/// permissions to move the value
/// @param pledgesAmounts An array of pledge amounts and IDs which are extrapolated
/// using the D64 bitmask
/// @param idReceiver Destination of the value, can be a giver sending
/// to a giver or a delegate or a delegate to another delegate or a
/// project to pre-commit it to that project
/// @notice Transfers multiple amounts within multiple Pledges in an
/// efficient single call
/// @param idSender Id of the Admin that is transferring the amounts from
/// all the Pledges; this admin must have permissions to move the value
/// @param pledgesAmounts An array of Pledge amounts and the idPledges with
/// which the amounts are associated; these are extrapolated using the D64
/// bitmask
/// @param idReceiver Destination of the `pledesAmounts`, can be a Giver or
/// Project sending to a Giver, a Delegate or a Project; a Delegate sending
/// to another Delegate, or a Delegate pre-commiting it to a Project
function mTransfer(
uint64 idSender,
uint[] pledgesAmounts,
@ -332,10 +324,11 @@ contract LiquidPledging is LiquidPledgingBase {
}
}
/// @notice `mWithdraw` allows for multiple pledges to be
/// withdrawn efficiently
/// @param pledgesAmounts An array of pledge amounts and IDs which are
/// extrapolated using the D64 bitmask
/// @notice Authorizes multiple amounts within multiple Pledges to be
/// withdrawn from the `vault` in an efficient single call
/// @param pledgesAmounts An array of Pledge amounts and the idPledges with
/// which the amounts are associated; these are extrapolated using the D64
/// bitmask
function mWithdraw(uint[] pledgesAmounts) {
for (uint i = 0; i < pledgesAmounts.length; i++ ) {
uint64 idPledge = uint64( pledgesAmounts[i] & (D64-1) );
@ -482,16 +475,19 @@ contract LiquidPledging is LiquidPledgingBase {
/// end of the delegate chain for a given Pledge.
/// @param idPledge Id of the pledge thats delegate chain will be modified.
/// @param amount Quantity of value that's shifted from delegates.
/// @param q Number (or depth) to remove as delegates
/// @param q Number (or depth) of delegates to remove
/// @return toPledge The id for the pledge being adjusted or created
function undelegate(
uint64 idPledge,
uint amount,
uint q
) internal returns (uint64){
) internal returns (uint64)
{
Pledge storage p = findPledge(idPledge);
uint64[] memory newDelegationChain = new uint64[](
p.delegationChain.length - q
);
for (uint i=0; i<p.delegationChain.length - q; i++) {
newDelegationChain[i] = p.delegationChain[i];
}
@ -559,8 +555,7 @@ contract LiquidPledging is LiquidPledgingBase {
callPlugins(false, from, to, amount);
}
/// @notice `normalizePledge` only affects pledges with the Pledged PledgeState
/// and does 2 things:
/// @notice Only affects pledges with the Pledged PledgeState for 2 things:
/// #1: Checks if the pledge should be committed. This means that
/// if the pledge has an intendedProject and it is past the
/// commitTime, it changes the owner to be the proposed project
@ -576,6 +571,7 @@ contract LiquidPledging is LiquidPledgingBase {
/// In general it can be called to force the calls of the affected
/// plugins, which also need to be predicted by the UI
/// @param idPledge This is the id of the pledge that will be normalized
/// @return The normalized Pledge!
function normalizePledge(uint64 idPledge) returns(uint64) {
Pledge storage p = findPledge(idPledge);