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add to low amount to incoming TXs

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Matias Alejo Garcia 2017-06-22 11:38:13 -03:00
commit c54b38a9a9
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GPG key ID: 02470DB551277AB3
14 changed files with 110 additions and 37 deletions
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56
src/js/services/feeService.js
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@ -4,6 +4,7 @@ angular.module('copayApp.services').factory('feeService', function($log, $timeou
var root = {};
var CACHE_TIME_TS = 60; // 1 min
var LOW_AMOUNT_RATIO = 0.15; //Ratio low amount warning (econ fee/amount)
// Constant fee options to translate
root.feeOpts = {
@ -43,7 +44,7 @@ angular.module('copayApp.services').factory('feeService', function($log, $timeou
var feeRate = feeLevelRate.feePerKB;
if (!fromCache) $log.debug('Dynamic fee: ' + feeLevel + '/' + network +' ' + (feeLevelRate.feePerKB / 1000).toFixed() + ' SAT/B');
if (!fromCache) $log.debug('Dynamic fee: ' + feeLevel + '/' + network + ' ' + (feeLevelRate.feePerKB / 1000).toFixed() + ' SAT/B');
return cb(null, feeRate);
});
@ -55,8 +56,8 @@ angular.module('copayApp.services').factory('feeService', function($log, $timeou
root.getFeeLevels = function(cb) {
if (cache.updateTs > Date.now() - CACHE_TIME_TS * 1000 ) {
$timeout( function() {
if (cache.updateTs > Date.now() - CACHE_TIME_TS * 1000) {
$timeout(function() {
return cb(null, cache.data, true);
}, 1);
}
@ -70,7 +71,7 @@ angular.module('copayApp.services').factory('feeService', function($log, $timeou
return cb(gettextCatalog.getString('Could not get dynamic fee'));
}
cache.updateTs =Date.now();
cache.updateTs = Date.now();
cache.data = {
'livenet': levelsLivenet,
'testnet': levelsTestnet
@ -81,5 +82,52 @@ angular.module('copayApp.services').factory('feeService', function($log, $timeou
});
};
// These 2 functions were taken from
// https://github.com/bitpay/bitcore-wallet-service/blob/master/lib/model/txproposal.js#L243
function getEstimatedSizeForSingleInput(wallet) {
switch (wallet.credentials.addressType) {
case 'P2PKH':
return 147;
default:
case 'P2SH':
return wallet.m * 72 + wallet.n * 36 + 44;
}
};
function getEstimatedSize(wallet) {
// Note: found empirically based on all multisig P2SH inputs and within m & n allowed limits.
var safetyMargin = 0.02;
var overhead = 4 + 4 + 9 + 9;
var inputSize = getEstimatedSizeForSingleInput(wallet);
var outputSize = 34;
var nbInputs = 1; //Assume 1 input
var nbOutputs = 2; // Assume 2 outputs
var size = overhead + inputSize * nbInputs + outputSize * nbOutputs;
return parseInt((size * (1 + safetyMargin)).toFixed(0));
};
// Approx utxo amount, from which the uxto is economically redeemable
root.getLowAmount = function(wallet, cb) {
root.getFeeLevels(function(err, levels) {
if (err) return cb(err);
var lowLevelRate = (lodash.find(levels[wallet.network], {
level: 'economy',
}).feePerKB / 1000).toFixed(0);
var size = getEstimatedSize(wallet);
var minFee = size * lowLevelRate;
return cb(null, parseInt(minFee / (LOW_AMOUNT_RATIO)));
});
};
return root;
});