status-im
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web3.js
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parsing events output

This commit is contained in:
Marek Kotewicz 2015-02-03 16:16:38 +01:00
parent 1860b3dff9
commit a5909d82eb
6 changed files with 71 additions and 15 deletions
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36
dist/ethereum.js vendored
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@ -391,6 +391,11 @@ var addFunctionsToContract = function (contract, desc, address) {
var addEventRelatedPropertiesToContract = function (contract, desc, address) {
contract.address = address;
contract._onWatchEventResult = function (data) {
var matchingEvent = event.getMatchingEvent(utils.filterEvents(desc));
var parser = eventImpl.outputParser(matchingEvent);
return parser(data);
};
Object.defineProperty(contract, 'topic', {
get: function() {
@ -411,6 +416,10 @@ var addEventsToContract = function (contract, desc, address) {
var signature = abi.eventSignatureFromAscii(e.name);
var event = eventImpl.inputParser(address, signature, e);
var o = event.apply(null, params);
o._onWatchEventResult = function (data) {
var parser = eventImpl.outputParser(e);
return parser(data);
};
return web3.eth.watch(o);
};
@ -571,15 +580,19 @@ var getArgumentsObject = function (inputs, indexed, notIndexed) {
}, {});
};
var outputParser = function (event) {
return function (output) {
var result = {
event: utils.extractDisplayName(event.name),
number: output.number
number: output.number,
args: {}
};
if (!output.topic) {
return result;
}
var indexedOutputs = filterInputs(event.inputs, true);
var indexedData = "0x" + output.topic.slice(1, output.topic.length).map(function (topic) { return topic.slice(2); }).join("");
var indexedRes = abi.formatOutput(indexedOutputs, indexedData);
@ -593,9 +606,21 @@ var outputParser = function (event) {
};
};
var getMatchingEvent = function (events, payload) {
for (var i = 0; i < events.length; i++) {
var signature = abi.eventSignatureFromAscii(events[i].name);
if (signature === payload.topic[0]) {
return events[i];
}
}
return undefined;
};
module.exports = {
inputParser: inputParser,
outputParser: outputParser
outputParser: outputParser,
getMatchingEvent: getMatchingEvent
};
@ -639,6 +664,8 @@ var Filter = function(options, impl) {
console.warn('"topics" is deprecated, use "topic" instead');
}
this._onWatchResult = options._onWatchEventResult;
// evaluate lazy properties
options = {
to: options.to,
@ -673,7 +700,8 @@ Filter.prototype.changed = function(callback) {
Filter.prototype.trigger = function(messages) {
for (var i = 0; i < this.callbacks.length; i++) {
for (var j = 0; j < messages.length; j++) {
this.callbacks[i].call(this, messages[j]);
var message = this._onWatchResult ? this._onWatchResult(messages[j]) : messages[j];
this.callbacks[i].call(this, message);
}
}
};

8
dist/ethereum.js.map vendored
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File diff suppressed because one or more lines are too long

2
dist/ethereum.min.js vendored
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File diff suppressed because one or more lines are too long

9
lib/contract.js
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@ -120,6 +120,11 @@ var addFunctionsToContract = function (contract, desc, address) {
var addEventRelatedPropertiesToContract = function (contract, desc, address) {
contract.address = address;
contract._onWatchEventResult = function (data) {
var matchingEvent = event.getMatchingEvent(utils.filterEvents(desc));
var parser = eventImpl.outputParser(matchingEvent);
return parser(data);
};
Object.defineProperty(contract, 'topic', {
get: function() {
@ -140,6 +145,10 @@ var addEventsToContract = function (contract, desc, address) {
var signature = abi.eventSignatureFromAscii(e.name);
var event = eventImpl.inputParser(address, signature, e);
var o = event.apply(null, params);
o._onWatchEventResult = function (data) {
var parser = eventImpl.outputParser(e);
return parser(data);
};
return web3.eth.watch(o);
};

26
lib/event.js
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@ -90,15 +90,19 @@ var getArgumentsObject = function (inputs, indexed, notIndexed) {
}, {});
};
var outputParser = function (event) {
return function (output) {
var result = {
event: utils.extractDisplayName(event.name),
number: output.number
number: output.number,
args: {}
};
if (!output.topic) {
return result;
}
var indexedOutputs = filterInputs(event.inputs, true);
var indexedData = "0x" + output.topic.slice(1, output.topic.length).map(function (topic) { return topic.slice(2); }).join("");
var indexedRes = abi.formatOutput(indexedOutputs, indexedData);
@ -112,8 +116,20 @@ var outputParser = function (event) {
};
};
module.exports = {
inputParser: inputParser,
outputParser: outputParser
var getMatchingEvent = function (events, payload) {
for (var i = 0; i < events.length; i++) {
var signature = abi.eventSignatureFromAscii(events[i].name);
if (signature === payload.topic[0]) {
return events[i];
}
}
return undefined;
};
module.exports = {
inputParser: inputParser,
outputParser: outputParser,
getMatchingEvent: getMatchingEvent
};

5
lib/filter.js
View File

@ -37,6 +37,8 @@ var Filter = function(options, impl) {
console.warn('"topics" is deprecated, use "topic" instead');
}
this._onWatchResult = options._onWatchEventResult;
// evaluate lazy properties
options = {
to: options.to,
@ -71,7 +73,8 @@ Filter.prototype.changed = function(callback) {
Filter.prototype.trigger = function(messages) {
for (var i = 0; i < this.callbacks.length; i++) {
for (var j = 0; j < messages.length; j++) {
this.callbacks[i].call(this, messages[j]);
var message = this._onWatchResult ? this._onWatchResult(messages[j]) : messages[j];
this.callbacks[i].call(this, message);
}
}
};