Initial sandbox for testing betting algorithms (uses the original simplified
algorithm that doesn't allow you to place bets you can't immediately fund)
This commit is contained in:
Eric Frias
parent
0f6e5ae510
commit
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1 changed files with 363 additions and 0 deletions
363
betting_simulator.html
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363
betting_simulator.html
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<!DOCTYPE html>
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<html ng-app="startApp">
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<head>
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<title>Peerplays Bookie Sandbox</title>
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<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous">
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<link href="https://maxcdn.bootstrapcdn.com/bootswatch/3.3.7/slate/bootstrap.min.css" rel="stylesheet" integrity="sha384-RpX8okQqCyUNG7PlOYNybyJXYTtGQH+7rIKiVvg1DLg6jahLEk47VvpUyS+E2/uJ" crossorigin="anonymous">
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<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/angularjs/1.5.7/angular.min.js"></script>
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<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/angularjs/1.5.7/angular-route.min.js"></script>
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<script type="text/javascript">
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var startApp=angular.module('startApp',['ngRoute']);
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startApp.config(['$routeProvider',
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function($routeProvider) {
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$routeProvider.
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when('/page1', {
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templateUrl: '/page1.html',
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controller: 'Page1Controller'
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}).
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when('/page2', {
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templateUrl: '/page2.html',
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controller: 'Page2Controller'
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}).
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otherwise({
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redirectTo: '/page1'
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});
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}]);
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startApp.controller('Page1Controller', ['$scope', function($scope) {
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let make_starting_balance = () => { return {balance: 10000, win: 0, not_win: 0, cancel: 0, not_cancel: 0}; }
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$scope.account_balances = { alice: make_starting_balance(), bob: make_starting_balance(), charlie: make_starting_balance(), dave: make_starting_balance() };
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$scope.order_book = { backs: [], lays: [] };
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$scope.bet_to_place = {username: 'alice', back_or_lay: 'back', amount_to_bet: null, amount_to_win: null};
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$scope.event_log = [];
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$scope.get_odds = (order) => (order.amount_to_win - order.amount_to_bet) / order.amount_to_bet;
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$scope.get_decimal_odds = (order) => order.amount_to_win / order.amount_to_bet;
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$scope.get_inverse_odds = (order) => order.amount_to_bet / (order.amount_to_win - order.amount_to_bet);
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$scope.get_inverse_decimal_odds = (order) => order.amount_to_win / (order.amount_to_win - order.amount_to_bet)
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// for sorting order books
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let order_compare = (a, b) => $scope.get_decimal_odds(a) - $scope.get_decimal_odds(b)
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let reduce_balances = (account_name, parent_event_log_entry) => {
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let balances = $scope.account_balances[account_name];
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let additional_not_cancel_balance = Math.min(balances.win, balances.not_win);
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balances.win -= additional_not_cancel_balance;
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balances.not_win -= additional_not_cancel_balance;
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balances.not_cancel += additional_not_cancel_balance;
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let immediate_winnings = Math.min(balances.cancel, balances.not_cancel);
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balances.cancel -= immediate_winnings;
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balances.not_cancel -= immediate_winnings;
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balances.balance += immediate_winnings;
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if (immediate_winnings)
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parent_event_log_entry.subentries.push({ description: `returning guaranteed winnings of ${immediate_winnings} to ${account_name}`, subentries: [] });
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};
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let try_to_match_bet = (new_bet, back_or_lay, order_book_to_match_against, parent_event_log_entry) => {
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let new_bet_odds = $scope.get_decimal_odds(new_bet);
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while (order_book_to_match_against.length) {
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let top_of_order_book = order_book_to_match_against[0];
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let top_bet_odds = $scope.get_inverse_decimal_odds(top_of_order_book);
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if (new_bet_odds > top_bet_odds)
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return false;
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let amount_taker_will_bet = Math.min(new_bet.amount_to_bet, top_of_order_book.amount_to_win - top_of_order_book.amount_to_bet);
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let amount_maker_will_bet = amount_taker_will_bet * top_of_order_book.amount_to_bet / (top_of_order_book.amount_to_win - top_of_order_book.amount_to_bet);
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let amount_winner_will_win = amount_taker_will_bet + amount_maker_will_bet;
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let match_log_entry = { description: `matched a bet from ${top_of_order_book.username} for ${amount_taker_will_bet} to win ${amount_winner_will_win}`, subentries: [] };
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parent_event_log_entry.subentries.push(match_log_entry);
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// Change our payout ledger
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if (back_or_lay == 'back') {
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$scope.account_balances[new_bet.username].win += amount_winner_will_win;
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$scope.account_balances[top_of_order_book.username].not_win += amount_winner_will_win;
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} else {
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$scope.account_balances[new_bet.username].not_win += amount_winner_will_win;
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$scope.account_balances[top_of_order_book.username].win += amount_winner_will_win;
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}
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$scope.account_balances[new_bet.username].cancel += amount_taker_will_bet;
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$scope.account_balances[top_of_order_book.username].cancel += amount_maker_will_bet;
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// and issue refunds if possible
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reduce_balances(new_bet.username, match_log_entry);
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reduce_balances(top_of_order_book.username, match_log_entry);
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// compute what is left of the taker's bet
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let new_taker_amount_to_bet = new_bet.amount_to_bet - amount_taker_will_bet;
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let new_taker_amount_to_win = new_taker_amount_to_bet + new_taker_amount_to_bet * (new_bet.amount_to_win - new_bet.amount_to_bet) / new_bet.amount_to_bet;
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new_bet.amount_to_bet = new_taker_amount_to_bet;
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new_bet.amount_to_win = new_taker_amount_to_win;
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// and what is left of the maker's bet
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top_of_order_book.amount_to_bet -= amount_maker_will_bet;
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top_of_order_book.amount_to_win -= amount_winner_will_win;
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// remove maker's bets from the books if we gobbled them up
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if (top_of_order_book.amount_to_bet == 0) {
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match_log_entry.subentries.push({ description: `fully matched bet from ${top_of_order_book.username}`, subentries: [] });
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order_book_to_match_against.shift();
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}
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// if the taker's bet is filled, we're done; otherwise loop.
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if (new_bet.amount_to_bet == 0) {
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match_log_entry.subentries.push({ description: `fully matched bet from ${new_bet.username}`, subentries: [] });
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return true;
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} else {
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match_log_entry.subentries.push({ description: `partially matched bet from ${new_bet.username} stays on the books, betting ${new_bet.amount_to_bet} to win ${new_bet.amount_to_win}`, subentries: [] });
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}
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}
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return false; // if we got here, we failed to completely match the bet
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};
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$scope.place_bet = (username, back_or_lay, amount_to_bet, amount_to_win) => {
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if ($scope.account_balances[username].balance >= amount_to_bet) {
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let order_book = back_or_lay == 'back' ? $scope.order_book.backs : $scope.order_book.lays;
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let order_book_to_match_against = back_or_lay == 'back' ? $scope.order_book.lays : $scope.order_book.backs;
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$scope.account_balances[username].balance -= amount_to_bet;
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let this_bet = {username: username, amount_to_bet: amount_to_bet, amount_to_win: amount_to_win};
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let event_log_entry = { description: `${username} places a ${back_or_lay} bet for ${amount_to_bet} to win ${amount_to_win}, odds ${$scope.get_decimal_odds(this_bet)}`, subentries: [] };
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if (!try_to_match_bet(this_bet, back_or_lay, order_book_to_match_against, event_log_entry)) {
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order_book.push(this_bet);
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order_book.sort(order_compare);
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}
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$scope.event_log.push(event_log_entry);
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}
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};
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$scope.place_bet_from_form = () => {
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$scope.place_bet($scope.bet_to_place.username, $scope.bet_to_place.back_or_lay, parseInt($scope.bet_to_place.amount_to_bet), parseInt($scope.bet_to_place.amount_to_win));
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$scope.bet_to_place = {username: 'alice', back_or_lay: 'back', amount_to_bet: null, amount_to_win: null};
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};
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let cancel_all_bets_on_side = (order_book_side, parent_log_entry) => {
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order_book_side.forEach( (bet) => {
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$scope.account_balances[bet.username].balance += bet.amount_to_bet;
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parent_log_entry.subentries.push({ description: `Returning ${bet.amount_to_bet} to ${bet.username}`, subentries: []});
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});
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order_book_side = [];
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};
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let cancel_all_bets = (parent_log_entry) => {
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let cancel_event_log_entry = { description: `Canceling all bets`, subentries: []};
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cancel_all_bets_on_side($scope.order_book.backs, cancel_event_log_entry);
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$scope.order_book.backs = [];
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cancel_all_bets_on_side($scope.order_book.lays, cancel_event_log_entry);
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$scope.order_book.lays = [];
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parent_log_entry.subentries.push(cancel_event_log_entry);
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};
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$scope.payout = (condition) => {
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let payout_event_log_entry = { description: `Paying out a ${condition}`, subentries: []};
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cancel_all_bets(payout_event_log_entry);
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for (var account_name in $scope.account_balances) {
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if ($scope.account_balances.hasOwnProperty(account_name)) {
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let balance_object = $scope.account_balances[account_name];
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let total_paid = 0;
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if (condition == 'win')
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total_paid = balance_object.win + balance_object.not_cancel;
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else if (condition == 'not win')
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total_paid = balance_object.not_win + balance_object.not_cancel;
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else
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total_paid = balance_object.cancel;
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balance_object.win = 0;
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balance_object.not_win = 0;
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balance_object.not_cancel = 0;
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balance_object.cancel = 0;
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if (total_paid) {
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payout_event_log_entry.subentries.push({ description: `Paying ${total_paid} to ${account_name}`, subentries: []});
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balance_object.balance += total_paid;
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}
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}
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}
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$scope.event_log.push(payout_event_log_entry);
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};
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//$scope.place_bet("bob", "lay", 500, 1000);
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//$scope.place_bet("bob", "lay", 100, 1100);
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//$scope.place_bet("bob", "lay", 1000, 1500);
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//$scope.place_bet("alice", "back", 500, 1000);
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//$scope.place_bet("alice", "back", 500, 1500);
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}]);
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startApp.controller('Page2Controller', ['$scope', function($scope) {
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}]);
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</script>
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</head>
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<body>
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<!-- Inline partials -->
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<!-- Page 1 -->
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<script type="text/ng-template" id="/page1.html">
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<div class="container">
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<div class="page-header">
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<h1>Peerplays Engine Playground</h1>
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</div>
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<div class="row">
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<div class="col-sm-6">
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<div class="panel panel-default">
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<div class="panel-heading">Available Balances</div>
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<table class="table">
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<tr>
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<th>account</th>
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<th>balance</th>
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<th>win</th>
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<th>not win</th>
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<th>cancel</th>
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<th>not cancel</th>
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</tr>
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<tr ng-repeat="(account_name, balance_record) in account_balances">
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<td>{{account_name}}</td>
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<td>{{balance_record.balance}}</td>
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<td>{{balance_record.win}}</td>
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<td>{{balance_record.not_win}}</td>
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<td>{{balance_record.cancel}}</td>
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<td>{{balance_record.not_cancel}}</td>
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</tr>
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</table>
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</div>
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<div class="panel panel-default">
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<div class="panel-heading">Resolve Market</div>
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<div class="container">
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<form class="form">
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<div class="form-group">
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<button type="button" class="btn btn-primary" ng-click="payout('win')">Win</button>
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<button type="button" class="btn btn-primary" ng-click="payout('not win')">Not Win</button>
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<button type="button" class="btn btn-primary" ng-click="payout('cancel')">Cancel</button>
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</div>
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</form>
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</div>
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</div>
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</div>
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<div class="col-sm-6">
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<div class="panel panel-default">
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<div class="panel-heading">Place Bet</div>
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<form class="form-horizontal">
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<div class="form-group">
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<label for="account" class="control-label col-sm-2">Account:</label>
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<div class="col-sm-10">
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<select id="account" class="form-control" ng-model="bet_to_place.username">
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<option ng-repeat="(account_name, balance) in account_balances" value="{{account_name}}">{{account_name}}</option>
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</select>
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</div>
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</div>
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<div class="form-group">
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<label for="bet-type" class="control-label col-sm-2">Bet Type:</label>
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<div class="col-sm-10">
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<select id="bet-type" class="form-control" ng-model="bet_to_place.back_or_lay">
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<option value="back">Back</option>
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<option value="lay">Lay</option>
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</select>
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</div>
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</div>
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<div class="form-group">
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<label for="amount-to-bet" class="control-label col-sm-2">Amount to bet:</label>
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<div class="col-sm-10">
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<input id="amount-to-bet" class="form-control" type="text" ng-model="bet_to_place.amount_to_bet" />
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</div>
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</div>
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<div class="form-group">
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<label for="amount-to-win" class="control-label col-sm-2">Amount to win:</label>
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<div class="col-sm-10">
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<input id="amount-to-win" class="form-control" type="text" ng-model="bet_to_place.amount_to_win" /></label><br />
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</div>
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</div>
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<div class="form-group">
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<div class="col-sm-offset-2 col-sm-10">
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<input type="button" class="btn btn-default" ng-click="place_bet_from_form()" value="Place Bet" />
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</div>
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</div>
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</form>
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</div>
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</div>
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</div>
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<h2>Order book</h2>
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<div class="row">
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<div class="col-sm-5">
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<div class="panel panel-default">
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<div class="panel-heading">Back orders</div>
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<table class="table">
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<tr>
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<th>account</th>
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<th>amount_to_bet</th>
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<th>amount_to_win</th>
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<th>odds</th>
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<th>odds (decimal)</th>
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</tr>
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<tr ng-repeat="order in order_book.backs">
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<td>{{order.username}}</td>
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<td>{{order.amount_to_bet}}</td>
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<td>{{order.amount_to_win}}</td>
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<td>{{get_odds(order)}}:1</td>
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<td>{{get_decimal_odds(order)}}</td>
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</tr>
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</table>
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</div>
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</div>
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<div class="col-sm-7">
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<div class="panel panel-default">
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<div class="panel-heading">Lay orders</div>
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<table class="table">
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<tr>
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<th>username</th>
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<th>amount_to_bet</th>
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<th>amount_to_win</th>
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<th>odds</th>
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<th>odds (decimal)</th>
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<th>inverse odds</th>
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<th>inverse odds (decimal)</th>
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</tr>
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<tr ng-repeat="order in order_book.lays">
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<td>{{order.username}}</td>
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<td>{{order.amount_to_bet}}</td>
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<td>{{order.amount_to_win}}</td>
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<td>{{get_odds(order)}}:1</td>
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<td>{{get_decimal_odds(order)}}</td>
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<td>{{get_inverse_odds(order)}}:1</td>
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<td>{{get_inverse_decimal_odds(order)}}</td>
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</tr>
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</table>
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</div>
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</div>
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</div>
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<h2>Event log</h2>
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<div class="well">
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<ul>
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<li ng-repeat="event in event_log" ng-include="'logEntryTree'"></li>
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</li>
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</ul>
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</div>
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</div>
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</script>
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<script type="text/ng-template" id="logEntryTree">
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{{ event.description }}
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<ul ng-if="event.subentries">
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<li ng-repeat="event in event.subentries" ng-include="'logEntryTree'"></li>
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</ul>
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</script>
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<!-- Page 2 -->
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<script type="text/ng-template" id="/page2.html">
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<div>
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<h3>Welcome to the second page</h3>
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<div>
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<a ng-href="#/page1" >Back</a>
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</div>
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</div>
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</script>
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<!-- end of partials -->
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<div id="page-div" ng-view>
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</div>
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</body>
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</html>
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