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Report implemented.

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This commit is contained in:
Daniel A. Nagy 2015-05-07 17:42:02 +02:00
parent 013c435f92
commit ee67ef68fe
1 changed files with 40 additions and 4 deletions
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44
bzz/bzzcontract/swarm.sol
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@ -10,11 +10,14 @@ contract Swarm
struct Bee {
uint deposit; // amount deposited by this member
uint expiry; // expiration time of the deposit
uint256 missing; // member accused of losing this swarm chunk
bytes32 missing; // member accused of losing this swarm chunk
uint deadline; // block number before which chunk must be presented
}
mapping (address => Bee) swarm;
// block number of transactions presenting chunks
mapping (bytes32 => uint) presentedChunks;
function max(uint a, uint b) private returns (uint c) {
if(a >= b) return a;
@ -29,7 +32,7 @@ contract Swarm
///
/// @param time term of Swarm membership in seconds from now.
function signup(uint time) {
Bee b = swarm[msg.sender];
Bee b = swarm[tx.origin];
if(isClean(msg.sender) && now + time > now) {
b.expiry = max(b.expiry, now + time);
}
@ -40,7 +43,7 @@ contract Swarm
///
/// @dev Only allowed with clean status and expired term.
function withdraw() {
Bee b = swarm[msg.sender];
Bee b = swarm[tx.origin];
if(now > b.expiry && isClean(msg.sender)) {
msg.sender.send(b.deposit);
b.deposit = 0;
@ -61,7 +64,8 @@ contract Swarm
}
/// @notice Determine clean status of address `addr`.
/// No change in state.
/// Changes the state, but only as a matter of optimization.
/// Works as accessor.
///
/// @dev Defined as no signed receipt has been presented for missing chunk.
///
@ -70,9 +74,41 @@ contract Swarm
/// @return true if status is "Clean".
function isClean(address addr) returns (bool s) {
Bee b = swarm[addr];
if(b.missing != 0 && presentedChunks[b.missing] != 0) b.missing = 0;
return b.missing == 0; // nothing they signed is missing
}
/// @param suspect address of reported Swarm node
event Report(address suspect);
/// @notice Find out what is missing in case of a Report event.
///
/// @return 0 if nothing is missing, swarm hash otherwise
function whatIsMissing() returns (bytes32 h) {
bytes32 missing = swarm[tx.origin].missing;
if(presentedChunks[missing] != 0) missing = 0;
return missing;
}
/// @notice Report chunk `swarmHash` as missing.
///
/// @param swarmHash sha3 hash of the missing chunk
/// @param expiry expiration time of receipt
/// @param sig_v signature parameter v
/// @param sig_r signature parameter r
/// @param sig_s signature parameter s
function reportMissingChunk(bytes32 swarmHash, uint expiry,
uint8 sig_v, bytes32 sig_r, bytes32 sig_s) {
if(expiry < now) return;
bytes32 recptHash = sha3(MAGIC_NUMBER, swarmHash, expiry);
address signer = ecrecover(recptHash, sig_v, sig_r, sig_s);
if(!isClean(signer) || !expiresAfter(signer, now)) return;
Bee b = swarm[signer];
b.missing = swarmHash;
b.deadline = block.number + GRACE;
Report(signer);
}
/// @notice Determine if the deposit for `addr` is unaccessible until `time`.
/// No change in state.
///