mirror of
https://gitlab.com/pulsechaincom/erigon-pulse.git
synced 2024-12-24 20:47:16 +00:00
250 lines
9.0 KiB
Solidity
250 lines
9.0 KiB
Solidity
// Copyright 2016 The go-ethereum Authors
|
|
// This file is part of the go-ethereum library.
|
|
//
|
|
// The go-ethereum library is free software: you can redistribute it and/or modify
|
|
// it under the terms of the GNU Lesser General Public License as published by
|
|
// the Free Software Foundation, either version 3 of the License, or
|
|
// (at your option) any later version.
|
|
//
|
|
// The go-ethereum library is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU Lesser General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU Lesser General Public License
|
|
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
// ReleaseOracle is an Ethereum contract to store the current and previous
|
|
// versions of the go-ethereum implementation. Its goal is to allow Geth to
|
|
// check for new releases automatically without the need to consult a central
|
|
// repository.
|
|
//
|
|
// The contract takes a vote based approach on both assigning authorised signers
|
|
// as well as signing off on new Geth releases.
|
|
//
|
|
// Note, when a signer is demoted, the currently pending release is auto-nuked.
|
|
// The reason is to prevent suprises where a demotion actually tilts the votes
|
|
// in favor of one voter party and pushing out a new release as a consequence of
|
|
// a simple demotion.
|
|
contract ReleaseOracle {
|
|
// Votes is an internal data structure to count votes on a specific proposal
|
|
struct Votes {
|
|
address[] pass; // List of signers voting to pass a proposal
|
|
address[] fail; // List of signers voting to fail a proposal
|
|
}
|
|
|
|
// Version is the version details of a particular Geth release
|
|
struct Version {
|
|
uint32 major; // Major version component of the release
|
|
uint32 minor; // Minor version component of the release
|
|
uint32 patch; // Patch version component of the release
|
|
bytes20 commit; // Git SHA1 commit hash of the release
|
|
|
|
uint64 time; // Timestamp of the release approval
|
|
Votes votes; // Votes that passed this release
|
|
}
|
|
|
|
// Oracle authorization details
|
|
mapping(address => bool) authorised; // Set of accounts allowed to vote on updating the contract
|
|
address[] voters; // List of addresses currently accepted as signers
|
|
|
|
// Various proposals being voted on
|
|
mapping(address => Votes) authProps; // Currently running user authorization proposals
|
|
address[] authPend; // List of addresses being voted on (map indexes)
|
|
|
|
Version verProp; // Currently proposed release being voted on
|
|
Version[] releases; // All the positively voted releases
|
|
|
|
// isSigner is a modifier to authorize contract transactions.
|
|
modifier isSigner() {
|
|
if (authorised[msg.sender]) {
|
|
_
|
|
}
|
|
}
|
|
|
|
// Constructor to assign the initial set of signers.
|
|
function ReleaseOracle(address[] signers) {
|
|
// If no signers were specified, assign the creator as the sole signer
|
|
if (signers.length == 0) {
|
|
authorised[msg.sender] = true;
|
|
voters.push(msg.sender);
|
|
return;
|
|
}
|
|
// Otherwise assign the individual signers one by one
|
|
for (uint i = 0; i < signers.length; i++) {
|
|
authorised[signers[i]] = true;
|
|
voters.push(signers[i]);
|
|
}
|
|
}
|
|
|
|
// signers is an accessor method to retrieve all te signers (public accessor
|
|
// generates an indexed one, not a retrieve-all version).
|
|
function signers() constant returns(address[]) {
|
|
return voters;
|
|
}
|
|
|
|
// authProposals retrieves the list of addresses that authorization proposals
|
|
// are currently being voted on.
|
|
function authProposals() constant returns(address[]) {
|
|
return authPend;
|
|
}
|
|
|
|
// authVotes retrieves the current authorization votes for a particular user
|
|
// to promote him into the list of signers, or demote him from there.
|
|
function authVotes(address user) constant returns(address[] promote, address[] demote) {
|
|
return (authProps[user].pass, authProps[user].fail);
|
|
}
|
|
|
|
// currentVersion retrieves the semantic version, commit hash and release time
|
|
// of the currently votec active release.
|
|
function currentVersion() constant returns (uint32 major, uint32 minor, uint32 patch, bytes20 commit, uint time) {
|
|
if (releases.length == 0) {
|
|
return (0, 0, 0, 0, 0);
|
|
}
|
|
var release = releases[releases.length - 1];
|
|
|
|
return (release.major, release.minor, release.patch, release.commit, release.time);
|
|
}
|
|
|
|
// proposedVersion retrieves the semantic version, commit hash and the current
|
|
// votes for the next proposed release.
|
|
function proposedVersion() constant returns (uint32 major, uint32 minor, uint32 patch, bytes20 commit, address[] pass, address[] fail) {
|
|
return (verProp.major, verProp.minor, verProp.patch, verProp.commit, verProp.votes.pass, verProp.votes.fail);
|
|
}
|
|
|
|
// promote pitches in on a voting campaign to promote a new user to a signer
|
|
// position.
|
|
function promote(address user) {
|
|
updateSigner(user, true);
|
|
}
|
|
|
|
// demote pitches in on a voting campaign to demote an authorised user from
|
|
// its signer position.
|
|
function demote(address user) {
|
|
updateSigner(user, false);
|
|
}
|
|
|
|
// release votes for a particular version to be included as the next release.
|
|
function release(uint32 major, uint32 minor, uint32 patch, bytes20 commit) {
|
|
updateRelease(major, minor, patch, commit, true);
|
|
}
|
|
|
|
// nuke votes for the currently proposed version to not be included as the next
|
|
// release. Nuking doesn't require a specific version number for simplicity.
|
|
function nuke() {
|
|
updateRelease(0, 0, 0, 0, false);
|
|
}
|
|
|
|
// updateSigner marks a vote for changing the status of an Ethereum user, either
|
|
// for or against the user being an authorised signer.
|
|
function updateSigner(address user, bool authorize) internal isSigner {
|
|
// Gather the current votes and ensure we don't double vote
|
|
Votes votes = authProps[user];
|
|
for (uint i = 0; i < votes.pass.length; i++) {
|
|
if (votes.pass[i] == msg.sender) {
|
|
return;
|
|
}
|
|
}
|
|
for (i = 0; i < votes.fail.length; i++) {
|
|
if (votes.fail[i] == msg.sender) {
|
|
return;
|
|
}
|
|
}
|
|
// If no authorization proposal is open, add the user to the index for later lookups
|
|
if (votes.pass.length == 0 && votes.fail.length == 0) {
|
|
authPend.push(user);
|
|
}
|
|
// Cast the vote and return if the proposal cannot be resolved yet
|
|
if (authorize) {
|
|
votes.pass.push(msg.sender);
|
|
if (votes.pass.length <= voters.length / 2) {
|
|
return;
|
|
}
|
|
} else {
|
|
votes.fail.push(msg.sender);
|
|
if (votes.fail.length <= voters.length / 2) {
|
|
return;
|
|
}
|
|
}
|
|
// Proposal resolved in our favor, execute whatever we voted on
|
|
if (authorize && !authorised[user]) {
|
|
authorised[user] = true;
|
|
voters.push(user);
|
|
} else if (!authorize && authorised[user]) {
|
|
authorised[user] = false;
|
|
|
|
for (i = 0; i < voters.length; i++) {
|
|
if (voters[i] == user) {
|
|
voters[i] = voters[voters.length - 1];
|
|
voters.length--;
|
|
|
|
delete verProp; // Nuke any version proposal (no surprise releases!)
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
// Finally delete the resolved proposal, index and garbage collect
|
|
delete authProps[user];
|
|
|
|
for (i = 0; i < authPend.length; i++) {
|
|
if (authPend[i] == user) {
|
|
authPend[i] = authPend[authPend.length - 1];
|
|
authPend.length--;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
// updateRelease votes for a particular version to be included as the next release,
|
|
// or for the currently proposed release to be nuked out.
|
|
function updateRelease(uint32 major, uint32 minor, uint32 patch, bytes20 commit, bool release) internal isSigner {
|
|
// Skip nuke votes if no proposal is pending
|
|
if (!release && verProp.votes.pass.length == 0) {
|
|
return;
|
|
}
|
|
// Mark a new release if no proposal is pending
|
|
if (verProp.votes.pass.length == 0) {
|
|
verProp.major = major;
|
|
verProp.minor = minor;
|
|
verProp.patch = patch;
|
|
verProp.commit = commit;
|
|
}
|
|
// Make sure positive votes match the current proposal
|
|
if (release && (verProp.major != major || verProp.minor != minor || verProp.patch != patch || verProp.commit != commit)) {
|
|
return;
|
|
}
|
|
// Gather the current votes and ensure we don't double vote
|
|
Votes votes = verProp.votes;
|
|
for (uint i = 0; i < votes.pass.length; i++) {
|
|
if (votes.pass[i] == msg.sender) {
|
|
return;
|
|
}
|
|
}
|
|
for (i = 0; i < votes.fail.length; i++) {
|
|
if (votes.fail[i] == msg.sender) {
|
|
return;
|
|
}
|
|
}
|
|
// Cast the vote and return if the proposal cannot be resolved yet
|
|
if (release) {
|
|
votes.pass.push(msg.sender);
|
|
if (votes.pass.length <= voters.length / 2) {
|
|
return;
|
|
}
|
|
} else {
|
|
votes.fail.push(msg.sender);
|
|
if (votes.fail.length <= voters.length / 2) {
|
|
return;
|
|
}
|
|
}
|
|
// Proposal resolved in our favor, execute whatever we voted on
|
|
if (release) {
|
|
verProp.time = uint64(now);
|
|
releases.push(verProp);
|
|
delete verProp;
|
|
} else {
|
|
delete verProp;
|
|
}
|
|
}
|
|
}
|