Merge pull request #483 from isocolsky/ref/send-max
Improve response in send max API
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commit
d93630b5e8
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@ -1177,13 +1177,19 @@ WalletService.prototype.getSendMaxInfo = function(opts, cb) {
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amount: 0,
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fee: 0,
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inputs: [],
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utxosBelowFee: 0,
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amountBelowFee: 0,
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utxosAboveMaxSize: 0,
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amountAboveMaxSize: 0,
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};
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var inputs = _.reject(utxos, 'locked');
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if (!!opts.excludeUnconfirmedUtxos) {
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inputs = _.filter(inputs, 'confirmations');
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}
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inputs = _.sortBy(inputs, 'satoshis');
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inputs = _.sortBy(inputs, function(input) {
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return -input.satoshis;
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});
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if (_.isEmpty(inputs)) return cb(null, info);
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@ -1195,18 +1201,31 @@ WalletService.prototype.getSendMaxInfo = function(opts, cb) {
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feePerKb: opts.feePerKb,
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});
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var lastFee = txp.getEstimatedFee();
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_.eachRight(inputs, function(input) {
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txp.inputs.push(input);
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var fee = txp.getEstimatedFee();
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var sizeInKb = txp.getEstimatedSize() / 1000.;
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if (fee - lastFee > input.satoshis || sizeInKb > Defaults.MAX_TX_SIZE_IN_KB) {
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txp.inputs.pop();
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var baseTxpSize = txp.getEstimatedSize();
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var baseTxpFee = baseTxpSize * txp.feePerKb / 1000.;
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var sizePerInput = txp.getEstimatedSizeForSingleInput();
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var feePerInput = sizePerInput * txp.feePerKb / 1000.;
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var partitionedByAmount = _.partition(inputs, function(input) {
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return input.satoshis > feePerInput;
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});
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info.utxosBelowFee = partitionedByAmount[1].length;
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info.amountBelowFee = _.sum(partitionedByAmount[1], 'satoshis');
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inputs = partitionedByAmount[0];
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_.each(inputs, function(input, i) {
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var sizeInKb = (baseTxpSize + (i + 1) * sizePerInput) / 1000.;
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if (sizeInKb > Defaults.MAX_TX_SIZE_IN_KB) {
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info.utxosAboveMaxSize = inputs.length - i;
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info.amountAboveMaxSize = _.sum(_.slice(inputs, i), 'satoshis');
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return false;
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}
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lastFee = fee;
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txp.inputs.push(input);
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});
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if (_.isEmpty(txp.inputs)) return cb(null, info);
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info.size = txp.getEstimatedSize();
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info.fee = txp.getEstimatedFee();
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info.amount = _.sum(txp.inputs, 'satoshis') - info.fee;
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@ -3696,7 +3696,7 @@ describe('Wallet service', function() {
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});
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};
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it('should be able to get send max info on empty wallet', function(done) {
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it('should be able to get send max info on 0 utxo wallet', function(done) {
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server.getSendMaxInfo({
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feePerKb: 10000,
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returnInputs: true,
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@ -3707,6 +3707,10 @@ describe('Wallet service', function() {
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info.amount.should.equal(0);
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info.fee.should.equal(0);
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info.inputs.should.be.empty;
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info.utxosBelowFee.should.equal(0);
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info.amountBelowFee.should.equal(0);
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info.utxosAboveMaxSize.should.equal(0);
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info.amountAboveMaxSize.should.equal(0);
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done();
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});
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});
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@ -3722,6 +3726,10 @@ describe('Wallet service', function() {
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info.size.should.equal(1304);
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info.fee.should.equal(info.size * 10000 / 1000.);
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info.amount.should.equal(1e8 - info.fee);
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info.utxosBelowFee.should.equal(0);
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info.amountBelowFee.should.equal(0);
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info.utxosAboveMaxSize.should.equal(0);
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info.amountAboveMaxSize.should.equal(0);
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sendTx(info, done);
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});
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});
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@ -3745,7 +3753,6 @@ describe('Wallet service', function() {
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});
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});
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});
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it('should exclude unconfirmed inputs', function(done) {
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helpers.stubUtxos(server, wallet, ['u0.1', 0.2, 0.3, 0.4], function() {
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server.getSendMaxInfo({
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@ -3791,7 +3798,7 @@ describe('Wallet service', function() {
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});
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});
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it('should ignore utxos not contributing to total amount (below their cost in fee)', function(done) {
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helpers.stubUtxos(server, wallet, ['u0.1', 0.2, 0.3, 0.4, 0.000001, 0.0002, 0.0003], function() {
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helpers.stubUtxos(server, wallet, ['u0.1', 0.2, 0.3, 0.4, '1bit', '100bit', '200bit'], function() {
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server.getSendMaxInfo({
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feePerKb: 0.001e8,
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returnInputs: true,
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@ -3802,6 +3809,8 @@ describe('Wallet service', function() {
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info.size.should.equal(1304);
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info.fee.should.equal(info.size * 0.001e8 / 1000.);
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info.amount.should.equal(1e8 - info.fee);
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info.utxosBelowFee.should.equal(3);
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info.amountBelowFee.should.equal(301e2);
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server.getSendMaxInfo({
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feePerKb: 0.0001e8,
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returnInputs: true,
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@ -3811,12 +3820,32 @@ describe('Wallet service', function() {
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info.inputs.length.should.equal(6);
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info.size.should.equal(1907);
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info.fee.should.equal(info.size * 0.0001e8 / 1000.);
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info.amount.should.equal(1.0005e8 - info.fee);
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info.amount.should.equal(1.0003e8 - info.fee);
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info.utxosBelowFee.should.equal(1);
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info.amountBelowFee.should.equal(1e2);
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sendTx(info, done);
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});
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});
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});
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});
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it('should work when all inputs are below their cost in fee', function(done) {
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helpers.stubUtxos(server, wallet, ['u 10bit', '10bit', '20bit'], function() {
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server.getSendMaxInfo({
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feePerKb: 500e2,
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returnInputs: true,
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}, function(err, info) {
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should.not.exist(err);
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should.exist(info);
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info.inputs.should.be.empty;
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info.size.should.equal(0);
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info.fee.should.equal(0);
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info.amount.should.equal(0);
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info.utxosBelowFee.should.equal(3);
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info.amountBelowFee.should.equal(40e2);
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done();
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});
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});
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});
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it('should not go beyond max tx size', function(done) {
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var _oldDefault = Defaults.MAX_TX_SIZE_IN_KB;
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Defaults.MAX_TX_SIZE_IN_KB = 2;
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@ -3829,6 +3858,8 @@ describe('Wallet service', function() {
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should.exist(info);
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info.size.should.be.below(2000);
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info.inputs.length.should.be.below(9);
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info.utxosAboveMaxSize.should.equal(3);
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info.amountAboveMaxSize.should.equal(3e8);
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Defaults.MAX_TX_SIZE_IN_KB = _oldDefault;
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sendTx(info, done);
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});
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