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utils: toBTC()

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This commit is contained in:
Fedor Indutny 2014-05-15 02:59:07 +04:00
parent 2d937b67a1
commit 7e72a4d79d
2 changed files with 26 additions and 2 deletions
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18
lib/bcoin/utils.js
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@ -365,9 +365,23 @@ utils.revHex = function revHex(s) {
utils.assert = function assert(val, msg) {
if (!val)
throw new Error(msg || 'Assertion failed');
}
};
utils.assert.equal = function assertEqual(l, r, msg) {
if (l != r)
throw new Error(msg || ('Assertion failed: ' + l + ' != ' + r));
}
};
utils.toBTC = function toBTC(satoshi) {
var m = new bn(10000000).mul(new bn(10));
var lo = satoshi.mod(m);
if (lo.cmpn(0) !== 0) {
lo = lo.toString(10);
while (lo.length < 8)
lo = '0' + lo;
lo = '.' + lo;
} else {
lo = '';
}
return satoshi.div(m).toString(10) + lo.replace(/0+$/, '');
};

10
test/utils-test.js
View File

@ -1,4 +1,5 @@
var assert = require('assert');
var bn = require('bn.js');
var bcoin = require('../');
describe('Utils', function() {
@ -18,4 +19,13 @@ describe('Utils', function() {
var target = bcoin.utils.bitsToTarget(bits);
assert(bcoin.utils.testTarget(target, hash));
});
it('should convert satoshi to btc', function() {
var btc = bcoin.utils.toBTC(new bn(5460));
assert.equal(btc, '0.0000546');
var btc = bcoin.utils.toBTC(new bn(54678).mul(new bn(1000000)));
assert.equal(btc, '546.78');
var btc = bcoin.utils.toBTC(new bn(5460).mul(new bn(10000000)));
assert.equal(btc, '546');
});
});