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Implement revokable and burnsOnRevoke options

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This commit is contained in:
Jorge Izquierdo
2017-05-21 10:38:56 +02:00
parent 350ab09855
commit 5b2f0aa93d
1 changed files with 29 additions and 8 deletions
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37
contracts/token/VestedToken.sol
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@ -11,6 +11,8 @@ contract VestedToken is StandardToken, TransferableToken {
uint64 cliff; uint64 cliff;
uint64 vesting; uint64 vesting;
uint64 start; uint64 start;
bool revokable;
bool burnsOnRevoke;
} }
mapping (address => TokenGrant[]) public grants; mapping (address => TokenGrant[]) public grants;
@ -20,7 +22,9 @@ contract VestedToken is StandardToken, TransferableToken {
uint256 _value, uint256 _value,
uint64 _start, uint64 _start,
uint64 _cliff, uint64 _cliff,
uint64 _vesting) { uint64 _vesting,
bool _revokable,
bool _burnsOnRevoke) {
if (_cliff < _start) { if (_cliff < _start) {
throw; throw;
@ -32,9 +36,17 @@ contract VestedToken is StandardToken, TransferableToken {
throw; throw;
} }
grants[_to].push(
TokenGrant memory grant = TokenGrant(msg.sender, _value, _cliff, _vesting, _start); TokenGrant(
grants[_to].push(grant); msg.sender,
_value,
_cliff,
_vesting,
_start,
_revokable,
_burnsOnRevoke
)
);
transfer(_to, _value); transfer(_to, _value);
} }
@ -42,9 +54,16 @@ contract VestedToken is StandardToken, TransferableToken {
function revokeTokenGrant(address _holder, uint _grantId) { function revokeTokenGrant(address _holder, uint _grantId) {
TokenGrant grant = grants[_holder][_grantId]; TokenGrant grant = grants[_holder][_grantId];
if (grant.granter != msg.sender) { if (!grant.revokable) { // Check if grant was revokable
throw; throw;
} }
if (grant.granter != msg.sender) { // Only granter can revoke it
throw;
}
address receiver = grant.burnsOnRevoke ? 0xdead : msg.sender;
uint256 nonVested = nonVestedTokens(grant, uint64(now)); uint256 nonVested = nonVestedTokens(grant, uint64(now));
// remove grant from array // remove grant from array
@ -52,16 +71,16 @@ contract VestedToken is StandardToken, TransferableToken {
grants[_holder][_grantId] = grants[_holder][grants[_holder].length - 1]; grants[_holder][_grantId] = grants[_holder][grants[_holder].length - 1];
grants[_holder].length -= 1; grants[_holder].length -= 1;
balances[msg.sender] = safeAdd(balances[msg.sender], nonVested); balances[receiver] = safeAdd(balances[receiver], nonVested);
balances[_holder] = safeSub(balances[_holder], nonVested); balances[_holder] = safeSub(balances[_holder], nonVested);
Transfer(_holder, msg.sender, nonVested); Transfer(_holder, receiver, nonVested);
} }
function tokenGrantsCount(address _holder) constant returns (uint index) { function tokenGrantsCount(address _holder) constant returns (uint index) {
return grants[_holder].length; return grants[_holder].length;
} }
function tokenGrant(address _holder, uint _grantId) constant returns (address granter, uint256 value, uint256 vested, uint64 start, uint64 cliff, uint64 vesting) { function tokenGrant(address _holder, uint _grantId) constant returns (address granter, uint256 value, uint256 vested, uint64 start, uint64 cliff, uint64 vesting, bool revokable, bool burnsOnRevoke) {
TokenGrant grant = grants[_holder][_grantId]; TokenGrant grant = grants[_holder][_grantId];
granter = grant.granter; granter = grant.granter;
@ -69,6 +88,8 @@ contract VestedToken is StandardToken, TransferableToken {
start = grant.start; start = grant.start;
cliff = grant.cliff; cliff = grant.cliff;
vesting = grant.vesting; vesting = grant.vesting;
revokable = grant.revokable;
burnsOnRevoke = grant.burnsOnRevoke;
vested = vestedTokens(grant, uint64(now)); vested = vestedTokens(grant, uint64(now));
} }