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https://github.com/fluencelabs/ethberlin-solidity-dsl
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.gitignore
vendored
4
.gitignore
vendored
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*.class
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*.log
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.idea
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target/
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5
build.sbt
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build.sbt
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name := "solidity-dsl"
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version := "0.1"
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scalaVersion := "2.12.6"
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project/build.properties
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project/build.properties
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sbt.version = 1.2.1
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181
src/main/scala/fluence/solidity/ast/Tokens.scala
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src/main/scala/fluence/solidity/ast/Tokens.scala
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package fluence.solidity.ast
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sealed trait Token
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sealed trait ContractToken extends Token
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sealed trait FunctionToken extends Token
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sealed trait ValueToken extends Token
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case class Pragma(lang: String, version: String) extends Token
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case class Contract(name: String, values: List[ValueToken], functions: List[FunctionToken] /*...*/) extends Token
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sealed trait Type
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case class BoolType(bool: Boolean)
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case class UintType(uint: Int)
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sealed trait Ops
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sealed trait BoolOps extends Ops
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case class !(b: BoolType) extends BoolOps
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case class &&(b1: BoolType, b2: BoolType) extends BoolOps
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/**
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pragma solidity ^0.4.22;
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/// @title Voting with delegation.
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contract Ballot {
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// This declares a new complex type which will
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// be used for variables later.
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// It will represent a single voter.
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struct Voter {
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uint weight; // weight is accumulated by delegation
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bool voted; // if true, that person already voted
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address delegate; // person delegated to
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uint vote; // index of the voted proposal
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}
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// This is a type for a single proposal.
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struct Proposal {
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bytes32 name; // short name (up to 32 bytes)
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uint voteCount; // number of accumulated votes
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}
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address public chairperson;
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// This declares a state variable that
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// stores a `Voter` struct for each possible address.
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mapping(address => Voter) public voters;
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// A dynamically-sized array of `Proposal` structs.
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Proposal[] public proposals;
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/// Create a new ballot to choose one of `proposalNames`.
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constructor(bytes32[] proposalNames) public {
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chairperson = msg.sender;
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voters[chairperson].weight = 1;
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// For each of the provided proposal names,
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// create a new proposal object and add it
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// to the end of the array.
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for (uint i = 0; i < proposalNames.length; i++) {
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// `Proposal({...})` creates a temporary
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// Proposal object and `proposals.push(...)`
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// appends it to the end of `proposals`.
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proposals.push(Proposal({
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name: proposalNames[i],
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voteCount: 0
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}));
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}
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}
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// Give `voter` the right to vote on this ballot.
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// May only be called by `chairperson`.
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function giveRightToVote(address voter) public {
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// If the first argument of `require` evaluates
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// to `false`, execution terminates and all
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// changes to the state and to Ether balances
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// are reverted.
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// This used to consume all gas in old EVM versions, but
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// not anymore.
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// It is often a good idea to use `require` to check if
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// functions are called correctly.
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// As a second argument, you can also provide an
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// explanation about what went wrong.
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require(
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msg.sender == chairperson,
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"Only chairperson can give right to vote."
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);
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require(
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!voters[voter].voted,
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"The voter already voted."
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);
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require(voters[voter].weight == 0);
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voters[voter].weight = 1;
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}
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/// Delegate your vote to the voter `to`.
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function delegate(address to) public {
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// assigns reference
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Voter storage sender = voters[msg.sender];
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require(!sender.voted, "You already voted.");
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require(to != msg.sender, "Self-delegation is disallowed.");
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// Forward the delegation as long as
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// `to` also delegated.
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// In general, such loops are very dangerous,
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// because if they run too long, they might
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// need more gas than is available in a block.
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// In this case, the delegation will not be executed,
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// but in other situations, such loops might
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// cause a contract to get "stuck" completely.
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while (voters[to].delegate != address(0)) {
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to = voters[to].delegate;
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// We found a loop in the delegation, not allowed.
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require(to != msg.sender, "Found loop in delegation.");
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}
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// Since `sender` is a reference, this
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// modifies `voters[msg.sender].voted`
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sender.voted = true;
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sender.delegate = to;
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Voter storage delegate_ = voters[to];
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if (delegate_.voted) {
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// If the delegate already voted,
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// directly add to the number of votes
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proposals[delegate_.vote].voteCount += sender.weight;
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} else {
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// If the delegate did not vote yet,
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// add to her weight.
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delegate_.weight += sender.weight;
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}
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}
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/// Give your vote (including votes delegated to you)
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/// to proposal `proposals[proposal].name`.
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function vote(uint proposal) public {
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Voter storage sender = voters[msg.sender];
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require(!sender.voted, "Already voted.");
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sender.voted = true;
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sender.vote = proposal;
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// If `proposal` is out of the range of the array,
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// this will throw automatically and revert all
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// changes.
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proposals[proposal].voteCount += sender.weight;
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}
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/// @dev Computes the winning proposal taking all
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/// previous votes into account.
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function winningProposal() public view
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returns (uint winningProposal_)
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{
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uint winningVoteCount = 0;
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for (uint p = 0; p < proposals.length; p++) {
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if (proposals[p].voteCount > winningVoteCount) {
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winningVoteCount = proposals[p].voteCount;
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winningProposal_ = p;
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}
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}
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}
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// Calls winningProposal() function to get the index
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// of the winner contained in the proposals array and then
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// returns the name of the winner
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function winnerName() public view
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returns (bytes32 winnerName_)
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{
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winnerName_ = proposals[winningProposal()].name;
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}
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}
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*/
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