772 lines
26 KiB
Solidity
772 lines
26 KiB
Solidity
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//File: contracts/LiquidPledgingBase.sol
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pragma solidity ^0.4.11;
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contract Vault {
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function authorizePayment(bytes32 _ref, address _dest, uint _amount);
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function () payable;
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}
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contract LiquidPledgingBase {
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uint constant MAX_DELEGATES = 20;
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uint constant MAX_SUBPROJECT_LEVEL = 20;
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uint constant MAX_INTERPROJECT_LEVEL = 20;
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enum NoteManagerType { Donor, Delegate, Project }// todo change name
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enum PaymentState { NotPaid, Paying, Paid }
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// This struct defines the details of each the NoteManager, these NoteManagers can create
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struct NoteManager {// change manager
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NoteManagerType managerType;
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address addr;
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string name;
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uint64 commitTime; // Only used in donors and projects, its the precommitment time
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uint64 parentProject; // Only for projects
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bool canceled; // Only for project
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}
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struct Note {
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uint amount;
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uint64 owner;
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uint64[] delegationChain; //index numbers!!!!!
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uint64 proposedProject; // TODO change the name only used for when delegates are precommiting to a project
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uint64 commitTime; // At what time the upcoming time will become an owner.
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uint64 oldNote; // this points to the Note[] index that the Note was derived from
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PaymentState paymentState;
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}
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Note[] notes;
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NoteManager[] managers; // the list of all the note managers 0 is reserved for no manager
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Vault public vault;
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// this mapping allows you to search for a specific note's index number by the hash of that note
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mapping (bytes32 => uint64) hNote2ddx;//TODO Fix typo
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/////
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// Modifiers
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/////
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modifier onlyVault() {
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require(msg.sender == address(vault));
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_;
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}
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//////
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// Constructor
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//////
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function LiquidPledgingBase(address _vault) {
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managers.length = 1; // we reserve the 0 manager
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notes.length = 1; // we reserve the 0 note
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vault = Vault(_vault);
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}
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///////
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// Managers functions
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//////
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function addDonor(string name, uint64 commitTime) {//Todo return idManager
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managers.push(NoteManager(
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NoteManagerType.Donor,
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msg.sender,
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name,
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commitTime,
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0,
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false));
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DonorAdded(uint64(managers.length-1));
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}
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event DonorAdded(uint64 indexed idDonor);
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function updateDonor(
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uint64 idDonor,
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address newAddr,
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string newName,
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uint64 newCommitTime)
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{
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NoteManager storage donor = findManager(idDonor);
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require(donor.managerType == NoteManagerType.Donor);
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require(donor.addr == msg.sender);
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donor.addr = newAddr;
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donor.name = newName;
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donor.commitTime = newCommitTime;
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DonorUpdated(idDonor);
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}
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event DonorUpdated(uint64 indexed idDonor);
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function addDelegate(string name) { //TODO return index number
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managers.push(NoteManager(
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NoteManagerType.Delegate,
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msg.sender,
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name,
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0,
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0,
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false));
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DeegateAdded(uint64(managers.length-1));
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}
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event DeegateAdded(uint64 indexed idDelegate);
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function updateDelegate(uint64 idDelegate, address newAddr, string newName) {
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NoteManager storage delegate = findManager(idDelegate);
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require(delegate.managerType == NoteManagerType.Delegate);
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require(delegate.addr == msg.sender);
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delegate.addr = newAddr;
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delegate.name = newName;
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DelegateUpdated(idDelegate);
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}
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event DelegateUpdated(uint64 indexed idDelegate);
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function addProject(string name, address projectManager, uint64 parentProject, uint64 commitTime) {
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if (parentProject != 0) {
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NoteManager storage pm = findManager(parentProject);
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require(pm.managerType == NoteManagerType.Project);
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require(pm.addr == msg.sender);
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require(getProjectLevel(pm) < MAX_SUBPROJECT_LEVEL);
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}
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managers.push(NoteManager(
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NoteManagerType.Project,
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projectManager,
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name,
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commitTime,
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parentProject,
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false));
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ProjectAdded(uint64(managers.length-1));
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}
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event ProjectAdded(uint64 indexed idProject);
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function updateProject(uint64 idProject, address newAddr, string newName, uint64 newCommitTime) {
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NoteManager storage project = findManager(idProject);
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require(project.managerType == NoteManagerType.Project);
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require(project.addr == msg.sender);
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project.addr = newAddr;
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project.name = newName;
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project.commitTime = newCommitTime;
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ProjectUpdated(idProject);
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}
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event ProjectUpdated(uint64 indexed idManager);
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//////////
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// Public constant functions
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//////////
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function numberOfNotes() constant returns (uint) {
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return notes.length - 1;
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}
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function getNote(uint64 idNote) constant returns(
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uint amount,
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uint64 owner,
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uint64 nDelegates,
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uint64 proposedProject,
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uint64 commitTime,
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uint64 oldNote,
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PaymentState paymentState
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) {
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Note storage n = findNote(idNote);
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amount = n.amount;
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owner = n.owner;
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nDelegates = uint64(n.delegationChain.length);
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proposedProject = n.proposedProject;
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commitTime = n.commitTime;
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oldNote = n.oldNote;
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paymentState = n.paymentState;
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}
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// This is to return the delegates one by one, because you can not return an array
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function getNoteDelegate(uint64 idNote, uint idxDelegate) constant returns(
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uint64 idDelegate,
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address addr,
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string name
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) {
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Note storage n = findNote(idNote);
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idDelegate = n.delegationChain[idxDelegate - 1];
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NoteManager storage delegate = findManager(idDelegate);
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addr = delegate.addr;
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name = delegate.name;
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}
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function numberOfNoteManagers() constant returns(uint) {
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return managers.length - 1;
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}
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function getNoteManager(uint64 idManager) constant returns (
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NoteManagerType managerType,
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address addr,
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string name,
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uint64 commitTime,
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uint64 parentProject,
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bool canceled)
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{
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NoteManager storage m = findManager(idManager);
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managerType = m.managerType;
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addr = m.addr;
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name = m.name;
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commitTime = m.commitTime;
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parentProject = m.parentProject;
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canceled = m.canceled;
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}
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////////
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// Private methods
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///////
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// All notes exist... but if the note hasn't been created in this system yet then it wouldn't
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// be in the hash array hNoteddx[]
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// this function creates a balloon if one is not created already... this ballon has 0 for the amount
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function findNote(
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uint64 owner,
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uint64[] delegationChain,
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uint64 proposedProject,
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uint64 commitTime,
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uint64 oldNote,
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PaymentState paid
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) internal returns (uint64)
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{
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bytes32 hNote = sha3(owner, delegationChain, proposedProject, commitTime, oldNote, paid);
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uint64 idx = hNote2ddx[hNote];
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if (idx > 0) return idx;
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idx = uint64(notes.length);
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hNote2ddx[hNote] = idx;
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notes.push(Note(0, owner, delegationChain, proposedProject, commitTime, oldNote, paid));
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return idx;
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}
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function findManager(uint64 idManager) internal returns (NoteManager storage) {
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require(idManager < managers.length);
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return managers[idManager];
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}
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function findNote(uint64 idNote) internal returns (Note storage) {
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require(idNote < notes.length);
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return notes[idNote];
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}
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// a constant for the case that a delegate is requested that is not a delegate in the system
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uint64 constant NOTFOUND = 0xFFFFFFFFFFFFFFFF;
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// helper function that searches the delegationChain fro a specific delegate and
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// level of delegation returns their idx in the delegation cahin which reflect their level of authority
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function getDelegateIdx(Note n, uint64 idDelegate) internal returns(uint64) {
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for (uint i=0; i<n.delegationChain.length; i++) {
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if (n.delegationChain[i] == idDelegate) return uint64(i);
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}
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return NOTFOUND;
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}
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// helper function that returns the note level solely to check that transfers
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// between Projects not violate MAX_INTERPROJECT_LEVEL
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function getNoteLevel(Note n) internal returns(uint) {
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if (n.oldNote == 0) return 0;//changed
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Note storage oldN = findNote(n.oldNote);
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return getNoteLevel(oldN) + 1;
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}
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// helper function that returns the project level solely to check that there
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// are not too many Projects that violate MAX_SUBPROJECT_LEVEL
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function getProjectLevel(NoteManager m) internal returns(uint) {
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assert(m.managerType == NoteManagerType.Project);
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if (m.parentProject == 0) return(1);
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NoteManager storage parentNM = findManager(m.parentProject);
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return getProjectLevel(parentNM);
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}
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function isProjectCanceled(uint64 projectId) constant returns (bool) {
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NoteManager storage m = findManager(projectId);
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if (m.managerType == NoteManagerType.Donor) return false;
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assert(m.managerType == NoteManagerType.Project);
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if (m.canceled) return true;
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if (m.parentProject == 0) return false;
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return isProjectCanceled(m.parentProject);
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}
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function isProjectCanceled2(uint64 projectId) constant returns (bool) {
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NoteManager storage m = findManager(projectId);
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return false;
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if (m.managerType == NoteManagerType.Donor) return false;
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assert(m.managerType == NoteManagerType.Project);
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if (m.canceled) return true;
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if (m.parentProject == 0) return false;
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return isProjectCanceled2(m.parentProject);
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}
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// this makes it easy to cancel projects
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// @param idNote the note that may or may not be cancelled
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function getOldestNoteNotCanceled(uint64 idNote) internal constant returns(uint64) { //todo rename
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if (idNote == 0) return 0;
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Note storage n = findNote(idNote);
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NoteManager storage manager = findManager(n.owner);
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if (manager.managerType == NoteManagerType.Donor) return idNote;
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assert(manager.managerType == NoteManagerType.Project);
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if (!isProjectCanceled(n.owner)) return idNote;
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return getOldestNoteNotCanceled(n.oldNote);
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}
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}
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//File: contracts/LiquidPledging.sol
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pragma solidity ^0.4.11;
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contract LiquidPledging is LiquidPledgingBase {
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//////
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// Constructor
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//////
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// This constructor actualy also calls the constructor for the
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// `LiquidPledgingBase` contract
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function LiquidPledging(address _vault) LiquidPledgingBase(_vault) {
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}
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/// @notice This is how value enters into the system which creates notes. The
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/// token of value goes into the vault and then the amount in the Note
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/// relevant to this donor without delegates is increased.
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/// After that, a normal transfer is done to the idReceiver.
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/// @param idDonor Identifier of the donor thats donating.
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/// @param idReceiver To whom it's transfered. Can be the same donor, another
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/// donor, a delegate or a project
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function donate(uint64 idDonor, uint64 idReceiver) payable {// TODO change to `pledge()`
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NoteManager storage sender = findManager(idDonor);
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require(sender.managerType == NoteManagerType.Donor);
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require(sender.addr == msg.sender);
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uint amount = msg.value;
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require(amount > 0);
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vault.transfer(amount); // transfers the baseToken to the Vault
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uint64 idNote = findNote(
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idDonor,
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new uint64[](0), //what is new
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0,
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0,
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0,
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PaymentState.NotPaid);
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Note storage nTo = findNote(idNote);
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nTo.amount += amount;
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Transfer(0, idNote, amount);
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transfer(idDonor, idNote, amount, idReceiver);
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}
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/// @notice This is the main function to move value from one Note to the other
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/// @param idSender ID of the donor, delegate or project manager that is transfering
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/// the funds from Note to Note. This manager must have permisions to move the value
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/// @param idNote Id of the note that's moving the value
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/// @param amount Quantity of value that's being moved
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/// @param idReceiver Destination of the value, can be a donor sending to a donor or
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/// a delegate, a delegate to another delegate or a project to precommit it to that project
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function transfer(uint64 idSender, uint64 idNote, uint amount, uint64 idReceiver) {
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idNote = normalizeNote(idNote);
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Note storage n = findNote(idNote);
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NoteManager storage receiver = findManager(idReceiver);
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NoteManager storage sender = findManager(idSender);
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require(sender.addr == msg.sender);
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require(n.paymentState == PaymentState.NotPaid);
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// If the sender is the owner
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if (n.owner == idSender) {
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if (receiver.managerType == NoteManagerType.Donor) {
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transferOwnershipToDonor(idNote, amount, idReceiver);
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} else if (receiver.managerType == NoteManagerType.Project) {
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transferOwnershipToProject(idNote, amount, idReceiver);
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} else if (receiver.managerType == NoteManagerType.Delegate) {
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appendDelegate(idNote, amount, idReceiver);
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} else {
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assert(false);
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}
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return;
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}
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// If the sender is a delegate
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uint senderDIdx = getDelegateIdx(n, idSender);
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if (senderDIdx != NOTFOUND) {
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// If the receiver is another donor
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if (receiver.managerType == NoteManagerType.Donor) {
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// Only accept to change to the original donor to remove all delegates
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assert(n.owner == idReceiver);
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undelegate(idNote, amount, n.delegationChain.length);
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return;
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}
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// If the receiver is another delegate
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if (receiver.managerType == NoteManagerType.Delegate) {
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uint receiverDIdx = getDelegateIdx(n, idReceiver);
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// If the receiver is not in the delegate list
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if (receiverDIdx == NOTFOUND) {
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undelegate(idNote, amount, n.delegationChain.length - senderDIdx - 1);
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appendDelegate(idNote, amount, idReceiver);
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// If the receiver is already part of the delegate chain and is
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// after the sender, then all of the other delegates after the sender are
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// removed and the receiver is appended at the end of the delegation chain
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} else if (receiverDIdx > senderDIdx) {
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undelegate(idNote, amount, n.delegationChain.length - senderDIdx - 1);
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appendDelegate(idNote, amount, idReceiver);
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// If the receiver is already part of the delegate chain and is
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// before the sender, then the sender and all of the other
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// delegates after the RECEIVER are revomved from the chain,
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// this is interesting because the delegate undelegates from the
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// delegates that delegated to this delegate... game theory issues? should this be allowed
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} else if (receiverDIdx <= senderDIdx) {
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undelegate(idNote, amount, n.delegationChain.length - receiverDIdx -1);
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}
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return;
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}
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// If the delegate wants to support a project, they undelegate all
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// the delegates after them in the chain and choose a project
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if (receiver.managerType == NoteManagerType.Project) {
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undelegate(idNote, amount, n.delegationChain.length - senderDIdx - 1);
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proposeAssignProject(idNote, amount, idReceiver);
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return;
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}
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}
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assert(false); // It is not the owner nor any delegate.
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}
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/// @notice This method is used to withdraw value from the system. This can be used
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/// by the donors to avoid committing the donation or by project manager to use
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/// the Ether.
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/// @param idNote Id of the note that wants to be withdrawed.
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/// @param amount Quantity of Ether that wants to be withdrawed.
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function withdraw(uint64 idNote, uint amount) {
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idNote = normalizeNote(idNote);
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Note storage n = findNote(idNote);
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require(n.paymentState == PaymentState.NotPaid);
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NoteManager storage owner = findManager(n.owner);
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require(owner.addr == msg.sender);
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uint64 idNewNote = findNote(
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n.owner,
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n.delegationChain,
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0,
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0,
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n.oldNote,
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PaymentState.Paying
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);
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doTransfer(idNote, idNewNote, amount);
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vault.authorizePayment(bytes32(idNewNote), owner.addr, amount);
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}
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/// @notice Method called by the vault to confirm a payment.
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/// @param idNote Id of the note that wants to be withdrawed.
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/// @param amount Quantity of Ether that wants to be withdrawed.
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function confirmPayment(uint64 idNote, uint amount) onlyVault {
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Note storage n = findNote(idNote);
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require(n.paymentState == PaymentState.Paying);
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// Check the project is not canceled in the while.
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require(getOldestNoteNotCanceled(idNote) == idNote);
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uint64 idNewNote = findNote(
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n.owner,
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n.delegationChain,
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0,
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0,
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n.oldNote,
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PaymentState.Paid
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);
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doTransfer(idNote, idNewNote, amount);
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}
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/// @notice Method called by the vault to cancel a payment.
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/// @param idNote Id of the note that wants to be canceled for withdraw.
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/// @param amount Quantity of Ether that wants to be rolled back.
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function cancelPayment(uint64 idNote, uint amount) onlyVault {
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Note storage n = findNote(idNote);
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require(n.paymentState == PaymentState.Paying); //TODO change to revert
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// When a payment is cacnceled, never is assigned to a project.
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uint64 oldNote = findNote(
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n.owner,
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n.delegationChain,
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0,
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0,
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n.oldNote,
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PaymentState.NotPaid
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);
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oldNote = normalizeNote(oldNote);
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doTransfer(idNote, oldNote, amount);
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}
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/// @notice Method called to cancel this project.
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/// @param idProject Id of the projct that wants to be canceled.
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function cancelProject(uint64 idProject) {
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NoteManager storage project = findManager(idProject);
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require(project.addr == msg.sender);
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project.canceled = true;
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}
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////////
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// Multi note methods
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////////
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// This set of functions makes moving a lot of notes around much more
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// efficient (saves gas) than calling these functions in series
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uint constant D64 = 0x10000000000000000;
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function mTransfer(uint64 idSender, uint[] notesAmounts, uint64 idReceiver) {
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for (uint i = 0; i < notesAmounts.length; i++ ) {
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uint64 idNote = uint64( notesAmounts[i] & (D64-1) );
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uint amount = notesAmounts[i] / D64;
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transfer(idSender, idNote, amount, idReceiver);
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}
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}
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function mWithdraw(uint[] notesAmounts) {
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for (uint i = 0; i < notesAmounts.length; i++ ) {
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uint64 idNote = uint64( notesAmounts[i] & (D64-1) );
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uint amount = notesAmounts[i] / D64;
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withdraw(idNote, amount);
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}
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}
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function mConfirmPayment(uint[] notesAmounts) {
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for (uint i = 0; i < notesAmounts.length; i++ ) {
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uint64 idNote = uint64( notesAmounts[i] & (D64-1) );
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uint amount = notesAmounts[i] / D64;
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confirmPayment(idNote, amount);
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}
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}
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function mCancelPayment(uint[] notesAmounts) {
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for (uint i = 0; i < notesAmounts.length; i++ ) {
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uint64 idNote = uint64( notesAmounts[i] & (D64-1) );
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uint amount = notesAmounts[i] / D64;
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cancelPayment(idNote, amount);
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}
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}
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////////
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// Private methods
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///////
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// this function is obvious, but it can also be called to undelegate everyone
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// by setting your self as teh idReceiver
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function transferOwnershipToProject(uint64 idNote, uint amount, uint64 idReceiver) internal {
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Note storage n = findNote(idNote);
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require(getNoteLevel(n) < MAX_INTERPROJECT_LEVEL);
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uint64 oldNote = findNote(
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n.owner,
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n.delegationChain,
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0,
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0,
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n.oldNote,
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PaymentState.NotPaid);
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uint64 toNote = findNote(
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idReceiver,
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new uint64[](0),
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0,
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0,
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oldNote,
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PaymentState.NotPaid);
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doTransfer(idNote, toNote, amount);
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}
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function transferOwnershipToDonor(uint64 idNote, uint amount, uint64 idReceiver) internal {
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Note storage n = findNote(idNote);
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|
|
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uint64 toNote = findNote(
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|
idReceiver,
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new uint64[](0),
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0,
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0,
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0,
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PaymentState.NotPaid);
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doTransfer(idNote, toNote, amount);
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}
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function appendDelegate(uint64 idNote, uint amount, uint64 idReceiver) internal {
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Note storage n= findNote(idNote);
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require(n.delegationChain.length < MAX_DELEGATES); //TODO change to revert and say the error
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uint64[] memory newDelegationChain = new uint64[](n.delegationChain.length + 1);
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for (uint i=0; i<n.delegationChain.length; i++) {
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newDelegationChain[i] = n.delegationChain[i];
|
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}
|
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|
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// Make the last item in the array the idReceiver
|
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newDelegationChain[n.delegationChain.length] = idReceiver;
|
|
|
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uint64 toNote = findNote(
|
|
n.owner,
|
|
newDelegationChain,
|
|
0,
|
|
0,
|
|
n.oldNote,
|
|
PaymentState.NotPaid);
|
|
doTransfer(idNote, toNote, amount);
|
|
}
|
|
|
|
/// @param q Unmber of undelegations
|
|
function undelegate(uint64 idNote, uint amount, uint q) internal {
|
|
Note storage n = findNote(idNote);
|
|
uint64[] memory newDelegationChain = new uint64[](n.delegationChain.length - q);
|
|
for (uint i=0; i<n.delegationChain.length - q; i++) {
|
|
newDelegationChain[i] = n.delegationChain[i];
|
|
}
|
|
uint64 toNote = findNote(
|
|
n.owner,
|
|
newDelegationChain,
|
|
0,
|
|
0,
|
|
n.oldNote,
|
|
PaymentState.NotPaid);
|
|
doTransfer(idNote, toNote, amount);
|
|
}
|
|
|
|
|
|
function proposeAssignProject(uint64 idNote, uint amount, uint64 idReceiver) internal {// Todo rename
|
|
Note storage n = findNote(idNote);
|
|
|
|
require(getNoteLevel(n) < MAX_SUBPROJECT_LEVEL);
|
|
|
|
NoteManager storage owner = findManager(n.owner);
|
|
uint64 toNote = findNote(
|
|
n.owner,
|
|
n.delegationChain,
|
|
idReceiver,
|
|
uint64(getTime() + owner.commitTime),
|
|
n.oldNote,
|
|
PaymentState.NotPaid);
|
|
doTransfer(idNote, toNote, amount);
|
|
}
|
|
|
|
function doTransfer(uint64 from, uint64 to, uint amount) internal {
|
|
if (from == to) return;
|
|
if (amount == 0) return;
|
|
Note storage nFrom = findNote(from);
|
|
Note storage nTo = findNote(to);
|
|
require(nFrom.amount >= amount);
|
|
nFrom.amount -= amount;
|
|
nTo.amount += amount;
|
|
|
|
Transfer(from, to, amount);
|
|
}
|
|
|
|
// This function does 2 things, #1: it checks to make sure that the pledges are correct
|
|
// if the a pledged project has already been commited then it changes the owner
|
|
// to be the proposed project (Note that the UI will have to read the commit time and manually
|
|
// do what this function does to the note for the end user at the expiration of the committime)
|
|
// #2: It checks to make sure that if there has been a cancellation in the chain of projects,
|
|
// then it adjusts the note's owner appropriately.
|
|
function normalizeNote(uint64 idNote) internal returns(uint64) {
|
|
Note storage n = findNote(idNote);
|
|
|
|
// Check to make sure this note hasnt already been used or is in the process of being used
|
|
if (n.paymentState != PaymentState.NotPaid) return idNote;
|
|
|
|
// First send to a project if it's proposed and commited
|
|
if ((n.proposedProject > 0) && ( getTime() > n.commitTime)) {
|
|
uint64 oldNote = findNote(
|
|
n.owner,
|
|
n.delegationChain,
|
|
0,
|
|
0,
|
|
n.oldNote,
|
|
PaymentState.NotPaid);
|
|
uint64 toNote = findNote(
|
|
n.proposedProject,
|
|
new uint64[](0),
|
|
0,
|
|
0,
|
|
oldNote,
|
|
PaymentState.NotPaid);
|
|
doTransfer(idNote, toNote, n.amount);
|
|
idNote = toNote;
|
|
n = findNote(idNote);
|
|
}
|
|
|
|
toNote = getOldestNoteNotCanceled(idNote);// TODO toNote is note defined
|
|
if (toNote != idNote) {
|
|
doTransfer(idNote, toNote, n.amount);
|
|
}
|
|
|
|
return toNote;
|
|
}
|
|
|
|
/////////////
|
|
// Test functions
|
|
/////////////
|
|
|
|
function getTime() internal returns (uint) {
|
|
return now;
|
|
}
|
|
|
|
event Transfer(uint64 indexed from, uint64 indexed to, uint amount);
|
|
|
|
}
|
|
|
|
//File: ./contracts/LiquidPledgingMock.sol
|
|
pragma solidity ^0.4.11;
|
|
|
|
|
|
|
|
// @dev LiquidPledgingMock mocks current block number
|
|
|
|
contract LiquidPledgingMock is LiquidPledging {
|
|
|
|
uint public mock_time;
|
|
|
|
function LiquidPledgingMock(address _vault) LiquidPledging(_vault) {
|
|
mock_time = now;
|
|
}
|
|
|
|
function getTime() internal returns (uint) {
|
|
return mock_time;
|
|
}
|
|
|
|
function setMockedTime(uint _t) {
|
|
mock_time = _t;
|
|
}
|
|
}
|