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[TASK] Add a constant for the maximum number representable as a Ripple value.

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This commit is contained in:
Stefan Thomas
2014-09-04 09:27:36 -07:00
parent 934cacfc1b
commit a3668defa8
3 changed files with 15 additions and 1 deletions
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4
src/js/ripple/amount.js
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@@ -33,6 +33,10 @@ var consts = exports.consts = {
cMinOffset: -96, cMinOffset: -96,
cMaxOffset: 80, cMaxOffset: 80,
// Maximum possible amount for non-XRP currencies using the maximum mantissa
// with maximum exponent. Corresponds to hex 0xEC6386F26FC0FFFF.
max_value: '9999999999999999e80'
}; };

2
src/js/ripple/serializedtypes.js
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@@ -345,7 +345,7 @@ var STAmount = exports.Amount = new SerializedType({
// Next eight bits: offset/exponent // Next eight bits: offset/exponent
hi |= ((97 + amount._offset) & 0xff) << 22; hi |= ((97 + amount._offset) & 0xff) << 22;
// Remaining 52 bits: mantissa // Remaining 54 bits: mantissa
hi |= amount._value.shiftRight(32).intValue() & 0x3fffff; hi |= amount._value.shiftRight(32).intValue() & 0x3fffff;
lo = amount._value.intValue() & 0xffffffff; lo = amount._value.intValue() & 0xffffffff;
} }

10
test/serializedtypes-test.js
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@@ -2,6 +2,7 @@ var utils = require('./testutils');
var assert = require('assert'); var assert = require('assert');
var SerializedObject = utils.load_module('serializedobject').SerializedObject; var SerializedObject = utils.load_module('serializedobject').SerializedObject;
var types = utils.load_module('serializedtypes'); var types = utils.load_module('serializedtypes');
var amountConstants = require('../src/js/ripple/amount').consts;
var BigInteger = require('../src/js/jsbn/jsbn').BigInteger; var BigInteger = require('../src/js/jsbn/jsbn').BigInteger;
var config = require('./testutils').get_config(); var config = require('./testutils').get_config();
@@ -550,6 +551,11 @@ describe('Serialized types', function() {
}); });
assert.strictEqual(so.to_hex(), 'D5438D7EA4C68000015841551A748AD23FEFFFFFFFEA028000000000E4FE687C90257D3D2D694C8531CDEECBE84F3367'); assert.strictEqual(so.to_hex(), 'D5438D7EA4C68000015841551A748AD23FEFFFFFFFEA028000000000E4FE687C90257D3D2D694C8531CDEECBE84F3367');
}); });
it('Serialize max_value/USD/rHb9CJAWyB4rj91VRWn96DkukG4bwdtyTh', function () {
var so = new SerializedObject();
types.Amount.serialize(so, amountConstants.max_value+'/USD/rHb9CJAWyB4rj91VRWn96DkukG4bwdtyTh');
assert.strictEqual(so.to_hex(), 'EC6386F26FC0FFFF0000000000000000000000005553440000000000B5F762798A53D543A014CAF8B297CFF8F2F937E8');
});
it('Parse 1 XRP', function () { it('Parse 1 XRP', function () {
var so = new SerializedObject('4000000000000001'); var so = new SerializedObject('4000000000000001');
assert.strictEqual(types.Amount.parse(so).to_json(), '1'); assert.strictEqual(types.Amount.parse(so).to_json(), '1');
@@ -582,6 +588,10 @@ describe('Serialized types', function() {
var so = new SerializedObject('94838D7EA4C680000000000000000000000000005553440000000000B5F762798A53D543A014CAF8B297CFF8F2F937E8'); var so = new SerializedObject('94838D7EA4C680000000000000000000000000005553440000000000B5F762798A53D543A014CAF8B297CFF8F2F937E8');
assert.strictEqual(types.Amount.parse(so).to_text_full(), '-1/USD/rHb9CJAWyB4rj91VRWn96DkukG4bwdtyTh'); assert.strictEqual(types.Amount.parse(so).to_text_full(), '-1/USD/rHb9CJAWyB4rj91VRWn96DkukG4bwdtyTh');
}); });
it('Parse max_value/USD/rHb9CJAWyB4rj91VRWn96DkukG4bwdtyTh', function () {
var so = new SerializedObject('EC6386F26FC0FFFF0000000000000000000000005553440000000000B5F762798A53D543A014CAF8B297CFF8F2F937E8');
assert.strictEqual(types.Amount.parse(so).to_text_full(), amountConstants.max_value+'/USD/rHb9CJAWyB4rj91VRWn96DkukG4bwdtyTh');
});
}); });
describe('Account', function() { describe('Account', function() {