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queue signature validation per-channel to ensure correct ordering

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This commit is contained in:
ansuz 2020-04-30 18:18:05 -04:00
parent ddd12bfd7a
commit 02347d134a
2 changed files with 23 additions and 15 deletions
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1
lib/historyKeeper.js
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@ -38,6 +38,7 @@ module.exports.create = function (config, cb) {
channel_cache: {},
queueStorage: WriteQueue(),
queueDeletes: WriteQueue(),
queueValidation: WriteQueue(),
batchIndexReads: BatchRead("HK_GET_INDEX"),
batchMetadata: BatchRead('GET_METADATA'),

37
lib/hk-util.js
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@ -859,23 +859,30 @@ HK.onChannelMessage = function (Env, Server, channel, msgStruct) {
// trim the checkpoint indicator off the message if it's present
let signedMsg = (isCp) ? msgStruct[4].replace(CHECKPOINT_PATTERN, '') : msgStruct[4];
// convert the message from a base64 string into a Uint8Array
//const txid = Util.uid();
// Listen for messages
//console.log(+new Date(), "Send verification request");
Env.validateMessage(signedMsg, metadata.validateKey, w(function (err) {
// no errors means success
if (!err) { return; }
// validation can fail in multiple ways
if (err === 'FAILED') {
// we log this case, but not others for some reason
Log.info("HK_SIGNED_MESSAGE_REJECTED", 'Channel '+channel.id);
}
// always abort if there was an error...
return void w.abort();
}));
/* queueing this helps avoid race conditions in which workers
validate and write messages in a different order than they were received.
For best effect the validate and store should actually be queued atomically,
but this is a step in the right direction.
*/
var proceed = w();
Env.queueValidation(channel.id, function (next) {
Env.validateMessage(signedMsg, metadata.validateKey, function (err) {
// always go on to the next item in the queue regardless of the outcome
next();
// no errors means success
if (!err) { return proceed(); }
// validation can fail in multiple ways
if (err === 'FAILED') {
// we log this case, but not others for some reason
Log.info("HK_SIGNED_MESSAGE_REJECTED", 'Channel '+channel.id);
}
// always abort if there was an error...
return void w.abort();
});
});
}).nThen(function () {
// do checkpoint stuff...