mirror of
https://github.com/status-im/snt-gas-relay.git
synced 2025-01-17 18:01:06 +00:00
710 lines
18 KiB
Solidity
710 lines
18 KiB
Solidity
pragma solidity ^0.4.21;
|
|
|
|
import "./ERC725.sol";
|
|
import "./ERC735.sol";
|
|
import "../common/MessageSigned.sol";
|
|
|
|
/**
|
|
* @title Self sovereign Identity
|
|
* @author Ricardo Guilherme Schmidt (Status Research & Development GmbH)
|
|
*/
|
|
contract Identity is ERC725, ERC735, MessageSigned {
|
|
|
|
mapping (bytes32 => Key) keys;
|
|
mapping (uint256 => bytes32[]) keysByPurpose;
|
|
mapping (bytes32 => Claim) claims;
|
|
mapping (uint256 => bytes32[]) claimsByType;
|
|
|
|
mapping (bytes32 => uint256) indexes;
|
|
mapping (uint256 => Transaction) multisigTx;
|
|
mapping (uint256 => uint256) purposeThreshold;
|
|
|
|
uint256 txCount;
|
|
uint256 nonce;
|
|
address recoveryContract;
|
|
bytes32 recoveryManager;
|
|
|
|
struct Transaction {
|
|
bool valid;
|
|
address to;
|
|
uint256 value;
|
|
bytes data;
|
|
uint256 approverCount;
|
|
mapping(bytes32 => bool) approvals;
|
|
}
|
|
|
|
/**
|
|
* @notice requires called by identity itself, otherwise forward to execute process
|
|
*/
|
|
modifier managementOnly {
|
|
if(msg.sender == address(this)) {
|
|
_;
|
|
} else {
|
|
_execute(keccak256(msg.sender), address(this), 0, msg.data);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @notices requires called by recovery address
|
|
*/
|
|
modifier recoveryOnly {
|
|
require(
|
|
recoveryContract != address(0) &&
|
|
msg.sender == recoveryContract
|
|
);
|
|
_;
|
|
}
|
|
|
|
/**
|
|
* @notice requires `_signature` from a `_key` with `_messageHash`
|
|
* @param _key key expected out from `_signature` of `_messageHash`
|
|
* @param _messageHash message signed in `_signature` by `_key`
|
|
* @param _signature `_messageHash` signed by `_key`
|
|
*/
|
|
modifier keyMessageSigned (
|
|
bytes32 _key,
|
|
bytes32 _messageHash,
|
|
bytes _signature
|
|
) {
|
|
require(
|
|
_key == keccak256(
|
|
recoverAddress(
|
|
getSignHash(_messageHash),
|
|
_signature
|
|
)
|
|
)
|
|
);
|
|
require(keys[_key].purpose != 0);
|
|
_;
|
|
}
|
|
|
|
/**
|
|
* @notice constructor builds identity with first key as `msg.sender`
|
|
*/
|
|
constructor(bytes32 _key) public {
|
|
_constructIdentity(keccak256(msg.sender));
|
|
}
|
|
|
|
/**
|
|
* @notice default function allows deposit of ETH
|
|
*/
|
|
function ()
|
|
public
|
|
payable
|
|
{
|
|
|
|
}
|
|
|
|
////////////////
|
|
// Execute calls and multisig approval
|
|
////////////////
|
|
|
|
/**
|
|
* @notice execute (or request) call
|
|
* @param _to destination of call
|
|
* @param _value amount of ETH in call
|
|
* @param _data data
|
|
*/
|
|
function execute(
|
|
address _to,
|
|
uint256 _value,
|
|
bytes _data
|
|
)
|
|
public
|
|
returns (uint256 txId)
|
|
{
|
|
txId = _execute(keccak256(msg.sender), _to, _value, _data);
|
|
}
|
|
|
|
/**
|
|
* @notice approve a multisigned execution
|
|
* @param _txId unique id multisig transaction
|
|
* @param _approval approve (true) or reject (false)
|
|
*/
|
|
function approve(uint256 _txId, bool _approval)
|
|
public
|
|
returns (bool success)
|
|
{
|
|
return _approveRequest(keccak256(msg.sender), _txId, _approval);
|
|
}
|
|
|
|
////////////////
|
|
// Message Signed functions
|
|
////////////////
|
|
|
|
/**
|
|
* @notice execute (or request) call using ethereum signed message as authorization
|
|
* @param _to destination of call
|
|
* @param _value amount of ETH in call
|
|
* @param _data data
|
|
* @param _txCount current txCount
|
|
* @param _key key authorizing the call
|
|
* @param _signature signature of key
|
|
*/
|
|
function executeMessageSigned(
|
|
address _to,
|
|
uint256 _value,
|
|
bytes _data,
|
|
uint256 _txCount,
|
|
bytes32 _key,
|
|
bytes _signature
|
|
)
|
|
public
|
|
keyMessageSigned(
|
|
_key,
|
|
keccak256(
|
|
address(this),
|
|
bytes4(keccak256("execute(address,uint256,bytes)")),
|
|
_to,
|
|
_value,
|
|
_data,
|
|
_txCount
|
|
),
|
|
_signature
|
|
)
|
|
returns (uint256 txId)
|
|
{
|
|
require(_txCount == txCount);
|
|
txId = _execute(_key, _to, _value, _data);
|
|
|
|
}
|
|
|
|
/**
|
|
* @notice approve a multisigned execution using ethereum signed message as authorization
|
|
* @param _txId unique id multisig transaction
|
|
* @param _approval approve (true) or reject (false)
|
|
* @param _key key authorizing the call
|
|
* @param _signature signature of key
|
|
*/
|
|
function approveMessageSigned(
|
|
uint256 _id,
|
|
bool _approval,
|
|
bytes32 _key,
|
|
bytes _signature
|
|
)
|
|
public
|
|
keyMessageSigned(
|
|
_key,
|
|
keccak256(
|
|
address(this),
|
|
bytes4(keccak256("approve(uint256,bool)")),
|
|
_id,
|
|
_approval
|
|
),
|
|
_signature
|
|
)
|
|
returns (bool success)
|
|
{
|
|
return _approveRequest(_key, _id, _approval);
|
|
}
|
|
|
|
|
|
////////////////
|
|
// Management functions
|
|
////////////////
|
|
|
|
/**
|
|
* @notice Adds a _key to the identity. The `_purpose`
|
|
* @param _key key hash being added
|
|
* @param _purpose specifies the purpose of key.
|
|
* @param _type inform type of key
|
|
*/
|
|
function addKey(
|
|
bytes32 _key,
|
|
uint256 _purpose,
|
|
uint256 _type
|
|
)
|
|
public
|
|
managementOnly
|
|
returns (bool success)
|
|
{
|
|
_addKey(_key, _purpose, _type);
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* @notice Replaces one `_oldKey` with other `_newKey`
|
|
* @param _purpose what purpose being replaced
|
|
* @param _oldKey key to remove
|
|
* @param _newKey key to add
|
|
* @param _newType inform type of `_newKey`
|
|
*/
|
|
function replaceKey(
|
|
uint256 _purpose,
|
|
bytes32 _oldKey,
|
|
bytes32 _newKey,
|
|
uint256 _newType
|
|
)
|
|
public
|
|
managementOnly
|
|
returns (bool success)
|
|
{
|
|
_addKey(_newKey, _purpose, _newType);
|
|
_removeKey(_oldKey, _purpose);
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* @notice Removes `_purpose` of `_key`
|
|
* @param _key key to remove
|
|
* @param _purpose purpose to remove
|
|
*/
|
|
function removeKey(
|
|
bytes32 _key,
|
|
uint256 _purpose
|
|
)
|
|
public
|
|
managementOnly
|
|
returns (bool success)
|
|
{
|
|
_removeKey(_key, _purpose);
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* @notice Defines minimum approval required by key type
|
|
* @param _purpose select purpose
|
|
* @param _minimumApprovals select how much signatures needed
|
|
*/
|
|
function setMinimumApprovalsByKeyType(
|
|
uint256 _purpose,
|
|
uint256 _minimumApprovals
|
|
)
|
|
public
|
|
managementOnly
|
|
{
|
|
require(_minimumApprovals > 0);
|
|
require(_minimumApprovals <= keysByPurpose[_purpose].length);
|
|
purposeThreshold[_purpose] = _minimumApprovals;
|
|
}
|
|
|
|
/**
|
|
* @notice Defines recovery address. This is one time only action.
|
|
* @param _recoveryContract address of recovery contract
|
|
*/
|
|
function setupRecovery(address _recoveryContract)
|
|
public
|
|
managementOnly
|
|
{
|
|
require(recoveryContract == address(0));
|
|
recoveryContract = _recoveryContract;
|
|
}
|
|
|
|
////////////////
|
|
// Claim related
|
|
////////////////
|
|
|
|
function addClaim(
|
|
uint256 _claimType,
|
|
uint256 _scheme,
|
|
address _issuer,
|
|
bytes _signature,
|
|
bytes _data,
|
|
string _uri
|
|
)
|
|
public
|
|
returns (bytes32 claimHash)
|
|
{
|
|
claimHash = keccak256(_issuer, _claimType);
|
|
if (msg.sender == address(this)) {
|
|
if (claims[claimHash].claimType > 0) {
|
|
_modifyClaim(claimHash, _claimType, _scheme, _issuer, _signature, _data, _uri);
|
|
} else {
|
|
_includeClaim(claimHash, _claimType, _scheme, _issuer, _signature, _data, _uri);
|
|
}
|
|
} else {
|
|
require(isKeyPurpose(keccak256(msg.sender), CLAIM_SIGNER_KEY));
|
|
_requestApproval(address(this), 0, msg.data);
|
|
emit ClaimRequested(
|
|
claimHash,
|
|
_claimType,
|
|
_scheme,
|
|
_issuer,
|
|
_signature,
|
|
_data,
|
|
_uri
|
|
);
|
|
}
|
|
}
|
|
|
|
function removeClaim(bytes32 _claimId)
|
|
public
|
|
returns (bool success)
|
|
{
|
|
Claim memory c = claims[_claimId];
|
|
|
|
require(
|
|
msg.sender == c.issuer ||
|
|
msg.sender == address(this)
|
|
);
|
|
|
|
// MUST only be done by the issuer of the claim, or KEYS OF PURPOSE 1, or the identity itself.
|
|
// TODO If its the identity itself, the approval process will determine its approval.
|
|
|
|
uint256 claimIdTypePos = indexes[_claimId];
|
|
delete indexes[_claimId];
|
|
bytes32[] storage claimsTypeArr = claimsByType[c.claimType];
|
|
bytes32 replacer = claimsTypeArr[claimsTypeArr.length-1];
|
|
claimsTypeArr[claimIdTypePos] = replacer;
|
|
indexes[replacer] = claimIdTypePos;
|
|
delete claims[_claimId];
|
|
claimsTypeArr.length--;
|
|
emit ClaimRemoved(_claimId, c.claimType, c.scheme, c.issuer, c.signature, c.data, c.uri);
|
|
return true;
|
|
}
|
|
|
|
////////////////
|
|
// Recovery methods
|
|
////////////////
|
|
|
|
function recoveryReset(bytes32 _newKey)
|
|
public
|
|
recoveryOnly
|
|
{
|
|
recoveryManager = _newKey;
|
|
_addKey(_newKey, ACTION_KEY, 0);
|
|
purposeThreshold[ACTION_KEY] = keysByPurpose[MANAGEMENT_KEY].length;
|
|
_addKey(_newKey, MANAGEMENT_KEY, 0);
|
|
purposeThreshold[MANAGEMENT_KEY] = keysByPurpose[MANAGEMENT_KEY].length;
|
|
}
|
|
|
|
/**
|
|
* @notice
|
|
*/
|
|
function processRecoveryReset(uint256 _limit)
|
|
public
|
|
{
|
|
require(recoveryManager != 0);
|
|
uint256 limit = _limit;
|
|
bytes32 newKey = recoveryManager;
|
|
bytes32[] memory managers = keysByPurpose[MANAGEMENT_KEY];
|
|
uint256 totalManagers = managers.length;
|
|
|
|
if (limit == 0) {
|
|
limit = totalManagers;
|
|
}
|
|
|
|
purposeThreshold[MANAGEMENT_KEY] = totalManagers - limit + 1;
|
|
for (uint256 i = 0; i < limit; i++) {
|
|
bytes32 manager = managers[i];
|
|
if (manager != newKey) {
|
|
_removeKey(manager, MANAGEMENT_KEY);
|
|
totalManagers--;
|
|
}
|
|
}
|
|
|
|
if (totalManagers == 1) {
|
|
delete recoveryManager;
|
|
}
|
|
}
|
|
|
|
////////////////
|
|
// Public Views
|
|
////////////////
|
|
|
|
function getKey(
|
|
bytes32 _key,
|
|
uint256 _purpose
|
|
)
|
|
public
|
|
view
|
|
returns(uint256 purpose, uint256 keyType, bytes32 key)
|
|
{
|
|
Key storage myKey = keys[keccak256(_key, _purpose)];
|
|
return (myKey.purpose, myKey.keyType, myKey.key);
|
|
}
|
|
|
|
function isKeyPurpose(bytes32 _key, uint256 _purpose)
|
|
public
|
|
view
|
|
returns (bool)
|
|
{
|
|
return keys[keccak256(_key, _purpose)].purpose == _purpose;
|
|
}
|
|
|
|
function getKeyPurpose(bytes32 _key)
|
|
public
|
|
view
|
|
returns(uint256[] purpose)
|
|
{
|
|
|
|
uint256[] memory purposeHolder = new uint256[](4);
|
|
uint8 counter = 0;
|
|
|
|
if (isKeyPurpose(_key, MANAGEMENT_KEY)) {
|
|
purposeHolder[counter] = MANAGEMENT_KEY;
|
|
counter++;
|
|
}
|
|
|
|
if (isKeyPurpose(_key, ACTION_KEY)) {
|
|
purposeHolder[counter] = ACTION_KEY;
|
|
counter++;
|
|
}
|
|
|
|
if (isKeyPurpose(_key, CLAIM_SIGNER_KEY)) {
|
|
purposeHolder[counter] = CLAIM_SIGNER_KEY;
|
|
counter++;
|
|
}
|
|
|
|
if (isKeyPurpose(_key, ENCRYPTION_KEY)) {
|
|
purposeHolder[counter] = ENCRYPTION_KEY;
|
|
counter++;
|
|
}
|
|
|
|
uint256[] memory result = new uint256[](counter);
|
|
for (uint8 i = 0; i < counter; i++) {
|
|
result[i] = purposeHolder[i];
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
function getKeysByPurpose(uint256 _purpose)
|
|
public
|
|
view
|
|
returns(bytes32[])
|
|
{
|
|
return keysByPurpose[_purpose];
|
|
}
|
|
|
|
function getClaim(bytes32 _claimId)
|
|
public
|
|
view
|
|
returns(
|
|
uint256 claimType,
|
|
uint256 scheme,
|
|
address issuer,
|
|
bytes signature,
|
|
bytes data,
|
|
string uri
|
|
)
|
|
{
|
|
Claim memory _claim = claims[_claimId];
|
|
return (_claim.claimType, _claim.scheme, _claim.issuer, _claim.signature, _claim.data, _claim.uri);
|
|
}
|
|
|
|
function getClaimIdsByType(uint256 _claimType)
|
|
public
|
|
view
|
|
returns(bytes32[] claimIds)
|
|
{
|
|
return claimsByType[_claimType];
|
|
}
|
|
|
|
////////////////
|
|
// Internal methods
|
|
////////////////
|
|
|
|
function _constructIdentity(bytes32 _managerKey)
|
|
internal
|
|
{
|
|
require(keysByPurpose[MANAGEMENT_KEY].length == 0);
|
|
require(purposeThreshold[MANAGEMENT_KEY] == 0);
|
|
_addKey(_managerKey, MANAGEMENT_KEY, 0);
|
|
_addKey(_managerKey, ACTION_KEY, 0);
|
|
|
|
purposeThreshold[MANAGEMENT_KEY] = 1;
|
|
purposeThreshold[ACTION_KEY] = 1;
|
|
}
|
|
|
|
function _execute(
|
|
bytes32 _key,
|
|
address _to,
|
|
uint256 _value,
|
|
bytes _data
|
|
)
|
|
internal
|
|
returns (uint256 txId)
|
|
{
|
|
uint256 requiredPurpose = _to == address(this) ? MANAGEMENT_KEY : ACTION_KEY;
|
|
require(isKeyPurpose(_key, requiredPurpose));
|
|
if (purposeThreshold[requiredPurpose] == 1) {
|
|
txId = txCount++;
|
|
_commitCall(txId, _to, _value, _data);
|
|
} else {
|
|
txId = _requestApproval(_to, _value, _data);
|
|
_approveRequest(_key, txId, true);
|
|
}
|
|
}
|
|
|
|
function _commitCall(
|
|
uint256 _txId,
|
|
address _to,
|
|
uint256 _value,
|
|
bytes _data
|
|
)
|
|
internal
|
|
returns(bool success)
|
|
{
|
|
nonce++;
|
|
success = _to.call.value(_value)(_data);
|
|
if (success) {
|
|
emit Executed(_txId, _to, _value, _data);
|
|
} else {
|
|
emit ExecutionFailed(_txId, _to, _value, _data);
|
|
}
|
|
}
|
|
|
|
function _requestApproval(
|
|
address _to,
|
|
uint256 _value,
|
|
bytes _data
|
|
)
|
|
internal
|
|
returns (uint256 txId)
|
|
{
|
|
txId = txCount++;
|
|
multisigTx[txCount] = Transaction({
|
|
valid: true,
|
|
to: _to,
|
|
value: _value,
|
|
data: _data,
|
|
approverCount: 0
|
|
});
|
|
emit ExecutionRequested(txId, _to, _value, _data);
|
|
}
|
|
|
|
////////////////
|
|
// Private methods
|
|
////////////////
|
|
|
|
function _approveRequest(
|
|
bytes32 _key,
|
|
uint256 _id,
|
|
bool _approval
|
|
)
|
|
private
|
|
returns(bool success) //(?) should return approved instead of success?
|
|
{
|
|
|
|
Transaction memory approvedTx = multisigTx[_id];
|
|
require(approvedTx.valid);
|
|
uint256 requiredKeyPurpose = approvedTx.to == address(this) ? MANAGEMENT_KEY : ACTION_KEY;
|
|
require(isKeyPurpose(_key, requiredKeyPurpose));
|
|
require(multisigTx[_id].approvals[_key] != _approval);
|
|
|
|
emit Approved(_id, _approval);
|
|
|
|
if (_approval) {
|
|
if (approvedTx.approverCount + 1 == purposeThreshold[requiredKeyPurpose]) {
|
|
delete multisigTx[_id];
|
|
return _commitCall(_id, approvedTx.to, approvedTx.value, approvedTx.data);
|
|
} else {
|
|
multisigTx[_id].approverCount++;
|
|
}
|
|
} else {
|
|
multisigTx[_id].approverCount--;
|
|
}
|
|
|
|
multisigTx[_id].approvals[_key] = _approval;
|
|
}
|
|
|
|
function _addKey(
|
|
bytes32 _key,
|
|
uint256 _purpose,
|
|
uint256 _type
|
|
)
|
|
private
|
|
{
|
|
require(_purpose > 0);
|
|
bytes32 keyHash = keccak256(_key, _purpose);
|
|
require(keys[keyHash].purpose == 0);
|
|
keys[keyHash] = Key(_purpose, _type, _key);
|
|
indexes[keyHash] = keysByPurpose[_purpose].push(_key) - 1;
|
|
emit KeyAdded(_key, _purpose, _type);
|
|
}
|
|
|
|
function _removeKey(
|
|
bytes32 _key,
|
|
uint256 _purpose
|
|
)
|
|
private
|
|
{
|
|
if (_purpose == MANAGEMENT_KEY) {
|
|
require(keysByPurpose[MANAGEMENT_KEY].length > purposeThreshold[MANAGEMENT_KEY]);
|
|
}
|
|
|
|
bytes32 keyHash = keccak256(_key, _purpose);
|
|
Key memory myKey = keys[keyHash];
|
|
uint256 index = indexes[keyHash];
|
|
bytes32 indexReplacer = keysByPurpose[_purpose][keysByPurpose[_purpose].length - 1];
|
|
|
|
keysByPurpose[_purpose][index] = indexReplacer;
|
|
indexes[keccak256(indexReplacer, _purpose)] = index;
|
|
keysByPurpose[_purpose].length--;
|
|
|
|
delete indexes[keyHash];
|
|
delete keys[keyHash];
|
|
|
|
emit KeyRemoved(myKey.key, myKey.purpose, myKey.keyType);
|
|
}
|
|
|
|
function _includeClaim(
|
|
bytes32 _claimHash,
|
|
uint256 _claimType,
|
|
uint256 _scheme,
|
|
address _issuer,
|
|
bytes _signature,
|
|
bytes _data,
|
|
string _uri
|
|
)
|
|
private
|
|
{
|
|
claims[_claimHash] = Claim(
|
|
{
|
|
claimType: _claimType,
|
|
scheme: _scheme,
|
|
issuer: _issuer,
|
|
signature: _signature,
|
|
data: _data,
|
|
uri: _uri
|
|
}
|
|
);
|
|
indexes[_claimHash] = claimsByType[_claimType].length;
|
|
claimsByType[_claimType].push(_claimHash);
|
|
emit ClaimAdded(
|
|
_claimHash,
|
|
_claimType,
|
|
_scheme,
|
|
_issuer,
|
|
_signature,
|
|
_data,
|
|
_uri
|
|
);
|
|
}
|
|
|
|
function _modifyClaim(
|
|
bytes32 _claimHash,
|
|
uint256 _claimType,
|
|
uint256 _scheme,
|
|
address _issuer,
|
|
bytes _signature,
|
|
bytes _data,
|
|
string _uri
|
|
)
|
|
private
|
|
{
|
|
require(msg.sender == _issuer);
|
|
claims[_claimHash] = Claim({
|
|
claimType: _claimType,
|
|
scheme: _scheme,
|
|
issuer: _issuer,
|
|
signature: _signature,
|
|
data: _data,
|
|
uri: _uri
|
|
});
|
|
emit ClaimChanged(
|
|
_claimHash,
|
|
_claimType,
|
|
_scheme,
|
|
_issuer,
|
|
_signature,
|
|
_data,
|
|
_uri
|
|
);
|
|
}
|
|
|
|
|
|
}
|
|
|