abi.js cleanup && new types.js, utils.js

This commit is contained in:
Marek Kotewicz 2015-01-31 02:54:17 +01:00
parent cf534d4726
commit 2491c99b37
9 changed files with 327 additions and 169 deletions

249
dist/ethereum.js vendored
View File

@ -27,6 +27,8 @@ if ("build" !== 'build') {/*
*/} */}
var web3 = require('./web3'); var web3 = require('./web3');
var utils = require('./utils');
var types = require('./types');
var f = require('./formatters'); var f = require('./formatters');
BigNumber.config({ ROUNDING_MODE: BigNumber.ROUND_DOWN }); BigNumber.config({ ROUNDING_MODE: BigNumber.ROUND_DOWN });
@ -36,22 +38,9 @@ var ETH_PADDING = 32;
/// method signature length in bytes /// method signature length in bytes
var ETH_METHOD_SIGNATURE_LENGTH = 4; var ETH_METHOD_SIGNATURE_LENGTH = 4;
/// Finds first index of array element matching pattern
/// @param array
/// @param callback pattern
/// @returns index of element
var findIndex = function (array, callback) {
var end = false;
var i = 0;
for (; i < array.length && !end; i++) {
end = callback(array[i]);
}
return end ? i - 1 : -1;
};
/// @returns a function that is used as a pattern for 'findIndex' /// @returns a function that is used as a pattern for 'findIndex'
var findMethodIndex = function (json, methodName) { var findMethodIndex = function (json, methodName) {
return findIndex(json, function (method) { return utils.findIndex(json, function (method) {
return method.name === methodName; return method.name === methodName;
}); });
}; };
@ -82,31 +71,6 @@ var filterEvents = function (json) {
}); });
}; };
/// @param string string to be padded
/// @param number of characters that result string should have
/// @param sign, by default 0
/// @returns right aligned string
/// TODO: remove, it was moved to formatters.js
var padLeft = function (string, chars, sign) {
return new Array(chars - string.length + 1).join(sign ? sign : "0") + string;
};
/// @param expected type prefix (string)
/// @returns function which checks if type has matching prefix. if yes, returns true, otherwise false
var prefixedType = function (prefix) {
return function (type) {
return type.indexOf(prefix) === 0;
};
};
/// @param expected type name (string)
/// @returns function which checks if type is matching expected one. if yes, returns true, otherwise false
var namedType = function (name) {
return function (type) {
return name === type;
};
};
/// This method should be called if we want to check if givent type is an array type /// This method should be called if we want to check if givent type is an array type
/// @returns true if it is, otherwise false /// @returns true if it is, otherwise false
var arrayType = function (type) { var arrayType = function (type) {
@ -120,23 +84,7 @@ var dynamicTypeBytes = function (type, value) {
return ""; return "";
}; };
/// Setups input formatters for solidity types var inputTypes = types.inputTypes();
/// @returns an array of input formatters
var setupInputTypes = function () {
return [
{ type: prefixedType('uint'), format: f.formatInputInt },
{ type: prefixedType('int'), format: f.formatInputInt },
{ type: prefixedType('hash'), format: f.formatInputInt },
{ type: prefixedType('string'), format: f.formatInputString },
{ type: prefixedType('real'), format: f.formatInputReal },
{ type: prefixedType('ureal'), format: f.formatInputReal },
{ type: namedType('address'), format: f.formatInputInt },
{ type: namedType('bool'), format: f.formatInputBool }
];
};
var inputTypes = setupInputTypes();
/// Formats input params to bytes /// Formats input params to bytes
/// @param contract json abi /// @param contract json abi
@ -184,23 +132,7 @@ var dynamicBytesLength = function (type) {
return 0; return 0;
}; };
/// Setups output formaters for solidity types var outputTypes = types.outputTypes();
/// @returns an array of output formatters
var setupOutputTypes = function () {
return [
{ type: prefixedType('uint'), format: f.formatOutputUInt },
{ type: prefixedType('int'), format: f.formatOutputInt },
{ type: prefixedType('hash'), format: f.formatOutputHash },
{ type: prefixedType('string'), format: f.formatOutputString },
{ type: prefixedType('real'), format: f.formatOutputReal },
{ type: prefixedType('ureal'), format: f.formatOutputUReal },
{ type: namedType('address'), format: f.formatOutputAddress },
{ type: namedType('bool'), format: f.formatOutputBool }
];
};
var outputTypes = setupOutputTypes();
/// Formats output bytes back to param list /// Formats output bytes back to param list
/// @param contract json abi /// @param contract json abi
@ -242,7 +174,7 @@ var fromAbiOutput = function (json, methodName, output) {
} }
result.push(array); result.push(array);
} }
else if (prefixedType('string')(method.outputs[i].type)) { else if (types.prefixedType('string')(method.outputs[i].type)) {
dynamicPart = dynamicPart.slice(padding); dynamicPart = dynamicPart.slice(padding);
result.push(formatter(output.slice(0, padding))); result.push(formatter(output.slice(0, padding)));
output = output.slice(padding); output = output.slice(padding);
@ -270,9 +202,10 @@ var methodTypeName = function (method) {
/// @param json abi for contract /// @param json abi for contract
/// @returns input parser object for given json abi /// @returns input parser object for given json abi
/// TODO: refactor creating the parser, do not double logic from contract
var inputParser = function (json) { var inputParser = function (json) {
var parser = {}; var parser = {};
filterFunctions(json).forEach(function (method) { json.forEach(function (method) {
var displayName = methodDisplayName(method.name); var displayName = methodDisplayName(method.name);
var typeName = methodTypeName(method.name); var typeName = methodTypeName(method.name);
@ -295,7 +228,7 @@ var inputParser = function (json) {
/// @returns output parser for given json abi /// @returns output parser for given json abi
var outputParser = function (json) { var outputParser = function (json) {
var parser = {}; var parser = {};
filterFunctions(json).forEach(function (method) { json.forEach(function (method) {
var displayName = methodDisplayName(method.name); var displayName = methodDisplayName(method.name);
var typeName = methodTypeName(method.name); var typeName = methodTypeName(method.name);
@ -332,7 +265,7 @@ module.exports = {
}; };
},{"./formatters":5,"./web3":9}],2:[function(require,module,exports){ },{"./formatters":5,"./types":9,"./utils":10,"./web3":11}],2:[function(require,module,exports){
/* /*
This file is part of ethereum.js. This file is part of ethereum.js.
@ -462,7 +395,7 @@ var addEventsToContract = function (contract, desc, address) {
var impl = function () { var impl = function () {
var params = Array.prototype.slice.call(arguments); var params = Array.prototype.slice.call(arguments);
var signature = abi.methodSignature(e.name); var signature = abi.methodSignature(e.name);
var event = eventImpl(address, signature); var event = eventImpl(address, signature, e);
var o = event.apply(null, params); var o = event.apply(null, params);
return web3.eth.watch(o); return web3.eth.watch(o);
}; };
@ -541,7 +474,7 @@ var contract = function (address, desc) {
module.exports = contract; module.exports = contract;
},{"./abi":1,"./event":3,"./web3":9}],3:[function(require,module,exports){ },{"./abi":1,"./event":3,"./web3":11}],3:[function(require,module,exports){
/* /*
This file is part of ethereum.js. This file is part of ethereum.js.
@ -565,8 +498,31 @@ module.exports = contract;
*/ */
var abi = require('./abi'); var abi = require('./abi');
var utils = require('./utils');
var inputWithName = function (inputs, name) {
var index = utils.findIndex(inputs, function (input) {
return input.name === name;
});
if (index === -1) {
console.error('indexed param ' + name + ' not found in the abi');
return undefined;
}
return inputs[index];
};
var indexedParamsToTopics = function (inputs, indexed) {
Object.keys(indexed).map(function (key) {
var inp = inputWithName(key);
var value = indexed[key];
if (value instanceof Array) {
}
});
};
var implementationOfEvent = function (address, signature, event) {
var implementationOfEvent = function (address, signature) {
// valid options are 'earliest', 'latest', 'offset' and 'max', as defined for 'eth.watch' // valid options are 'earliest', 'latest', 'offset' and 'max', as defined for 'eth.watch'
return function (indexed, options) { return function (indexed, options) {
@ -581,7 +537,7 @@ var implementationOfEvent = function (address, signature) {
module.exports = implementationOfEvent; module.exports = implementationOfEvent;
},{"./abi":1}],4:[function(require,module,exports){ },{"./abi":1,"./utils":10}],4:[function(require,module,exports){
/* /*
This file is part of ethereum.js. This file is part of ethereum.js.
@ -680,7 +636,7 @@ Filter.prototype.logs = function () {
module.exports = Filter; module.exports = Filter;
},{"./web3":9}],5:[function(require,module,exports){ },{"./web3":11}],5:[function(require,module,exports){
/* /*
This file is part of ethereum.js. This file is part of ethereum.js.
@ -707,6 +663,7 @@ if ("build" !== 'build') {/*
var BigNumber = require('bignumber.js'); // jshint ignore:line var BigNumber = require('bignumber.js'); // jshint ignore:line
*/} */}
// TODO: remove web3 dependency from here!
var web3 = require('./web3'); var web3 = require('./web3');
BigNumber.config({ ROUNDING_MODE: BigNumber.ROUND_DOWN }); BigNumber.config({ ROUNDING_MODE: BigNumber.ROUND_DOWN });
@ -838,7 +795,7 @@ module.exports = {
}; };
},{"./web3":9}],6:[function(require,module,exports){ },{"./web3":11}],6:[function(require,module,exports){
/* /*
This file is part of ethereum.js. This file is part of ethereum.js.
@ -1022,7 +979,7 @@ ProviderManager.prototype.stopPolling = function (pollId) {
module.exports = ProviderManager; module.exports = ProviderManager;
},{"./web3":9}],8:[function(require,module,exports){ },{"./web3":11}],8:[function(require,module,exports){
/* /*
This file is part of ethereum.js. This file is part of ethereum.js.
@ -1073,6 +1030,128 @@ module.exports = QtSyncProvider;
You should have received a copy of the GNU Lesser General Public License You should have received a copy of the GNU Lesser General Public License
along with ethereum.js. If not, see <http://www.gnu.org/licenses/>. along with ethereum.js. If not, see <http://www.gnu.org/licenses/>.
*/ */
/** @file types.js
* @authors:
* Marek Kotewicz <marek@ethdev.com>
* @date 2015
*/
var f = require('./formatters');
/// @param expected type prefix (string)
/// @returns function which checks if type has matching prefix. if yes, returns true, otherwise false
var prefixedType = function (prefix) {
return function (type) {
return type.indexOf(prefix) === 0;
};
};
/// @param expected type name (string)
/// @returns function which checks if type is matching expected one. if yes, returns true, otherwise false
var namedType = function (name) {
return function (type) {
return name === type;
};
};
/// Setups input formatters for solidity types
/// @returns an array of input formatters
var inputTypes = function () {
return [
{ type: prefixedType('uint'), format: f.formatInputInt },
{ type: prefixedType('int'), format: f.formatInputInt },
{ type: prefixedType('hash'), format: f.formatInputInt },
{ type: prefixedType('string'), format: f.formatInputString },
{ type: prefixedType('real'), format: f.formatInputReal },
{ type: prefixedType('ureal'), format: f.formatInputReal },
{ type: namedType('address'), format: f.formatInputInt },
{ type: namedType('bool'), format: f.formatInputBool }
];
};
/// Setups output formaters for solidity types
/// @returns an array of output formatters
var outputTypes = function () {
return [
{ type: prefixedType('uint'), format: f.formatOutputUInt },
{ type: prefixedType('int'), format: f.formatOutputInt },
{ type: prefixedType('hash'), format: f.formatOutputHash },
{ type: prefixedType('string'), format: f.formatOutputString },
{ type: prefixedType('real'), format: f.formatOutputReal },
{ type: prefixedType('ureal'), format: f.formatOutputUReal },
{ type: namedType('address'), format: f.formatOutputAddress },
{ type: namedType('bool'), format: f.formatOutputBool }
];
};
module.exports = {
prefixedType: prefixedType,
namedType: namedType,
inputTypes: inputTypes,
outputTypes: outputTypes
};
},{"./formatters":5}],10:[function(require,module,exports){
/*
This file is part of ethereum.js.
ethereum.js is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
ethereum.js is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with ethereum.js. If not, see <http://www.gnu.org/licenses/>.
*/
/** @file utils.js
* @authors:
* Marek Kotewicz <marek@ethdev.com>
* @date 2015
*/
/// Finds first index of array element matching pattern
/// @param array
/// @param callback pattern
/// @returns index of element
var findIndex = function (array, callback) {
var end = false;
var i = 0;
for (; i < array.length && !end; i++) {
end = callback(array[i]);
}
return end ? i - 1 : -1;
};
module.exports = {
findIndex: findIndex
};
},{}],11:[function(require,module,exports){
/*
This file is part of ethereum.js.
ethereum.js is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
ethereum.js is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with ethereum.js. If not, see <http://www.gnu.org/licenses/>.
*/
/** @file web3.js /** @file web3.js
* @authors: * @authors:
* Jeffrey Wilcke <jeff@ethdev.com> * Jeffrey Wilcke <jeff@ethdev.com>
@ -1404,7 +1483,7 @@ web3.abi = require('./lib/abi');
module.exports = web3; module.exports = web3;
},{"./lib/abi":1,"./lib/contract":2,"./lib/filter":4,"./lib/httpsync":6,"./lib/providermanager":7,"./lib/qtsync":8,"./lib/web3":9}]},{},["web3"]) },{"./lib/abi":1,"./lib/contract":2,"./lib/filter":4,"./lib/httpsync":6,"./lib/providermanager":7,"./lib/qtsync":8,"./lib/web3":11}]},{},["web3"])
//# sourceMappingURL=ethereum.js.map //# sourceMappingURL=ethereum.js.map

14
dist/ethereum.js.map vendored

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@ -26,6 +26,8 @@ if (process.env.NODE_ENV !== 'build') {
} }
var web3 = require('./web3'); var web3 = require('./web3');
var utils = require('./utils');
var types = require('./types');
var f = require('./formatters'); var f = require('./formatters');
BigNumber.config({ ROUNDING_MODE: BigNumber.ROUND_DOWN }); BigNumber.config({ ROUNDING_MODE: BigNumber.ROUND_DOWN });
@ -35,22 +37,9 @@ var ETH_PADDING = 32;
/// method signature length in bytes /// method signature length in bytes
var ETH_METHOD_SIGNATURE_LENGTH = 4; var ETH_METHOD_SIGNATURE_LENGTH = 4;
/// Finds first index of array element matching pattern
/// @param array
/// @param callback pattern
/// @returns index of element
var findIndex = function (array, callback) {
var end = false;
var i = 0;
for (; i < array.length && !end; i++) {
end = callback(array[i]);
}
return end ? i - 1 : -1;
};
/// @returns a function that is used as a pattern for 'findIndex' /// @returns a function that is used as a pattern for 'findIndex'
var findMethodIndex = function (json, methodName) { var findMethodIndex = function (json, methodName) {
return findIndex(json, function (method) { return utils.findIndex(json, function (method) {
return method.name === methodName; return method.name === methodName;
}); });
}; };
@ -81,31 +70,6 @@ var filterEvents = function (json) {
}); });
}; };
/// @param string string to be padded
/// @param number of characters that result string should have
/// @param sign, by default 0
/// @returns right aligned string
/// TODO: remove, it was moved to formatters.js
var padLeft = function (string, chars, sign) {
return new Array(chars - string.length + 1).join(sign ? sign : "0") + string;
};
/// @param expected type prefix (string)
/// @returns function which checks if type has matching prefix. if yes, returns true, otherwise false
var prefixedType = function (prefix) {
return function (type) {
return type.indexOf(prefix) === 0;
};
};
/// @param expected type name (string)
/// @returns function which checks if type is matching expected one. if yes, returns true, otherwise false
var namedType = function (name) {
return function (type) {
return name === type;
};
};
/// This method should be called if we want to check if givent type is an array type /// This method should be called if we want to check if givent type is an array type
/// @returns true if it is, otherwise false /// @returns true if it is, otherwise false
var arrayType = function (type) { var arrayType = function (type) {
@ -119,23 +83,7 @@ var dynamicTypeBytes = function (type, value) {
return ""; return "";
}; };
/// Setups input formatters for solidity types var inputTypes = types.inputTypes();
/// @returns an array of input formatters
var setupInputTypes = function () {
return [
{ type: prefixedType('uint'), format: f.formatInputInt },
{ type: prefixedType('int'), format: f.formatInputInt },
{ type: prefixedType('hash'), format: f.formatInputInt },
{ type: prefixedType('string'), format: f.formatInputString },
{ type: prefixedType('real'), format: f.formatInputReal },
{ type: prefixedType('ureal'), format: f.formatInputReal },
{ type: namedType('address'), format: f.formatInputInt },
{ type: namedType('bool'), format: f.formatInputBool }
];
};
var inputTypes = setupInputTypes();
/// Formats input params to bytes /// Formats input params to bytes
/// @param contract json abi /// @param contract json abi
@ -183,23 +131,7 @@ var dynamicBytesLength = function (type) {
return 0; return 0;
}; };
/// Setups output formaters for solidity types var outputTypes = types.outputTypes();
/// @returns an array of output formatters
var setupOutputTypes = function () {
return [
{ type: prefixedType('uint'), format: f.formatOutputUInt },
{ type: prefixedType('int'), format: f.formatOutputInt },
{ type: prefixedType('hash'), format: f.formatOutputHash },
{ type: prefixedType('string'), format: f.formatOutputString },
{ type: prefixedType('real'), format: f.formatOutputReal },
{ type: prefixedType('ureal'), format: f.formatOutputUReal },
{ type: namedType('address'), format: f.formatOutputAddress },
{ type: namedType('bool'), format: f.formatOutputBool }
];
};
var outputTypes = setupOutputTypes();
/// Formats output bytes back to param list /// Formats output bytes back to param list
/// @param contract json abi /// @param contract json abi
@ -241,7 +173,7 @@ var fromAbiOutput = function (json, methodName, output) {
} }
result.push(array); result.push(array);
} }
else if (prefixedType('string')(method.outputs[i].type)) { else if (types.prefixedType('string')(method.outputs[i].type)) {
dynamicPart = dynamicPart.slice(padding); dynamicPart = dynamicPart.slice(padding);
result.push(formatter(output.slice(0, padding))); result.push(formatter(output.slice(0, padding)));
output = output.slice(padding); output = output.slice(padding);
@ -269,9 +201,10 @@ var methodTypeName = function (method) {
/// @param json abi for contract /// @param json abi for contract
/// @returns input parser object for given json abi /// @returns input parser object for given json abi
/// TODO: refactor creating the parser, do not double logic from contract
var inputParser = function (json) { var inputParser = function (json) {
var parser = {}; var parser = {};
filterFunctions(json).forEach(function (method) { json.forEach(function (method) {
var displayName = methodDisplayName(method.name); var displayName = methodDisplayName(method.name);
var typeName = methodTypeName(method.name); var typeName = methodTypeName(method.name);
@ -294,7 +227,7 @@ var inputParser = function (json) {
/// @returns output parser for given json abi /// @returns output parser for given json abi
var outputParser = function (json) { var outputParser = function (json) {
var parser = {}; var parser = {};
filterFunctions(json).forEach(function (method) { json.forEach(function (method) {
var displayName = methodDisplayName(method.name); var displayName = methodDisplayName(method.name);
var typeName = methodTypeName(method.name); var typeName = methodTypeName(method.name);

View File

@ -127,7 +127,7 @@ var addEventsToContract = function (contract, desc, address) {
var impl = function () { var impl = function () {
var params = Array.prototype.slice.call(arguments); var params = Array.prototype.slice.call(arguments);
var signature = abi.methodSignature(e.name); var signature = abi.methodSignature(e.name);
var event = eventImpl(address, signature); var event = eventImpl(address, signature, e);
var o = event.apply(null, params); var o = event.apply(null, params);
return web3.eth.watch(o); return web3.eth.watch(o);
}; };

View File

@ -21,8 +21,31 @@
*/ */
var abi = require('./abi'); var abi = require('./abi');
var utils = require('./utils');
var inputWithName = function (inputs, name) {
var index = utils.findIndex(inputs, function (input) {
return input.name === name;
});
if (index === -1) {
console.error('indexed param ' + name + ' not found in the abi');
return undefined;
}
return inputs[index];
};
var indexedParamsToTopics = function (inputs, indexed) {
Object.keys(indexed).map(function (key) {
var inp = inputWithName(key);
var value = indexed[key];
if (value instanceof Array) {
}
});
};
var implementationOfEvent = function (address, signature, event) {
var implementationOfEvent = function (address, signature) {
// valid options are 'earliest', 'latest', 'offset' and 'max', as defined for 'eth.watch' // valid options are 'earliest', 'latest', 'offset' and 'max', as defined for 'eth.watch'
return function (indexed, options) { return function (indexed, options) {

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@ -24,6 +24,7 @@ if (process.env.NODE_ENV !== 'build') {
var BigNumber = require('bignumber.js'); // jshint ignore:line var BigNumber = require('bignumber.js'); // jshint ignore:line
} }
// TODO: remove web3 dependency from here!
var web3 = require('./web3'); var web3 = require('./web3');
BigNumber.config({ ROUNDING_MODE: BigNumber.ROUND_DOWN }); BigNumber.config({ ROUNDING_MODE: BigNumber.ROUND_DOWN });

79
lib/types.js Normal file
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@ -0,0 +1,79 @@
/*
This file is part of ethereum.js.
ethereum.js is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
ethereum.js is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with ethereum.js. If not, see <http://www.gnu.org/licenses/>.
*/
/** @file types.js
* @authors:
* Marek Kotewicz <marek@ethdev.com>
* @date 2015
*/
var f = require('./formatters');
/// @param expected type prefix (string)
/// @returns function which checks if type has matching prefix. if yes, returns true, otherwise false
var prefixedType = function (prefix) {
return function (type) {
return type.indexOf(prefix) === 0;
};
};
/// @param expected type name (string)
/// @returns function which checks if type is matching expected one. if yes, returns true, otherwise false
var namedType = function (name) {
return function (type) {
return name === type;
};
};
/// Setups input formatters for solidity types
/// @returns an array of input formatters
var inputTypes = function () {
return [
{ type: prefixedType('uint'), format: f.formatInputInt },
{ type: prefixedType('int'), format: f.formatInputInt },
{ type: prefixedType('hash'), format: f.formatInputInt },
{ type: prefixedType('string'), format: f.formatInputString },
{ type: prefixedType('real'), format: f.formatInputReal },
{ type: prefixedType('ureal'), format: f.formatInputReal },
{ type: namedType('address'), format: f.formatInputInt },
{ type: namedType('bool'), format: f.formatInputBool }
];
};
/// Setups output formaters for solidity types
/// @returns an array of output formatters
var outputTypes = function () {
return [
{ type: prefixedType('uint'), format: f.formatOutputUInt },
{ type: prefixedType('int'), format: f.formatOutputInt },
{ type: prefixedType('hash'), format: f.formatOutputHash },
{ type: prefixedType('string'), format: f.formatOutputString },
{ type: prefixedType('real'), format: f.formatOutputReal },
{ type: prefixedType('ureal'), format: f.formatOutputUReal },
{ type: namedType('address'), format: f.formatOutputAddress },
{ type: namedType('bool'), format: f.formatOutputBool }
];
};
module.exports = {
prefixedType: prefixedType,
namedType: namedType,
inputTypes: inputTypes,
outputTypes: outputTypes
};

39
lib/utils.js Normal file
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@ -0,0 +1,39 @@
/*
This file is part of ethereum.js.
ethereum.js is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
ethereum.js is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with ethereum.js. If not, see <http://www.gnu.org/licenses/>.
*/
/** @file utils.js
* @authors:
* Marek Kotewicz <marek@ethdev.com>
* @date 2015
*/
/// Finds first index of array element matching pattern
/// @param array
/// @param callback pattern
/// @returns index of element
var findIndex = function (array, callback) {
var end = false;
var i = 0;
for (; i < array.length && !end; i++) {
end = callback(array[i]);
}
return end ? i - 1 : -1;
};
module.exports = {
findIndex: findIndex
};