Add binary market page
This commit is contained in:
ekzyis
parent
fbab0b4975
commit
87ce57c862
9
go.mod
9
go.mod
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@ -3,21 +3,22 @@ module delphi.market
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go 1.20
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require (
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github.com/btcsuite/btcd/btcec/v2 v2.3.2
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github.com/btcsuite/btcd/btcec/v2 v2.2.2
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github.com/btcsuite/btcutil v1.0.2
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github.com/joho/godotenv v1.5.1
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github.com/labstack/echo/v4 v4.11.1
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github.com/lib/pq v1.10.9
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github.com/namsral/flag v1.7.4-pre
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github.com/skip2/go-qrcode v0.0.0-20200617195104-da1b6568686e
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golang.org/x/exp v0.0.0-20230725093048-515e97ebf090
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)
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require (
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github.com/decred/dcrd/dcrec/secp256k1/v4 v4.2.0 // indirect
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github.com/golang-jwt/jwt v3.2.2+incompatible // indirect
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github.com/joho/godotenv v1.5.1 // indirect
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github.com/labstack/gommon v0.4.0 // indirect
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github.com/lib/pq v1.10.9 // indirect
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github.com/mattn/go-colorable v0.1.13 // indirect
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github.com/mattn/go-isatty v0.0.19 // indirect
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github.com/namsral/flag v1.7.4-pre // indirect
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github.com/valyala/bytebufferpool v1.0.0 // indirect
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github.com/valyala/fasttemplate v1.2.2 // indirect
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golang.org/x/crypto v0.11.0 // indirect
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6
go.sum
6
go.sum
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@ -1,7 +1,7 @@
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github.com/aead/siphash v1.0.1/go.mod h1:Nywa3cDsYNNK3gaciGTWPwHt0wlpNV15vwmswBAUSII=
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github.com/btcsuite/btcd v0.20.1-beta/go.mod h1:wVuoA8VJLEcwgqHBwHmzLRazpKxTv13Px/pDuV7OomQ=
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github.com/btcsuite/btcd/btcec/v2 v2.3.2 h1:5n0X6hX0Zk+6omWcihdYvdAlGf2DfasC0GMf7DClJ3U=
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github.com/btcsuite/btcd/btcec/v2 v2.3.2/go.mod h1:zYzJ8etWJQIv1Ogk7OzpWjowwOdXY1W/17j2MW85J04=
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github.com/btcsuite/btcd/btcec/v2 v2.2.2 h1:5uxe5YjoCq+JeOpg0gZSNHuFgeogrocBYxvg6w9sAgc=
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github.com/btcsuite/btcd/btcec/v2 v2.2.2/go.mod h1:9/CSmJxmuvqzX9Wh2fXMWToLOHhPd11lSPuIupwTkI8=
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github.com/btcsuite/btclog v0.0.0-20170628155309-84c8d2346e9f/go.mod h1:TdznJufoqS23FtqVCzL0ZqgP5MqXbb4fg/WgDys70nA=
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github.com/btcsuite/btcutil v0.0.0-20190425235716-9e5f4b9a998d/go.mod h1:+5NJ2+qvTyV9exUAL/rxXi3DcLg2Ts+ymUAY5y4NvMg=
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github.com/btcsuite/btcutil v1.0.2 h1:9iZ1Terx9fMIOtq1VrwdqfsATL9MC2l8ZrUY6YZ2uts=
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@ -62,6 +62,8 @@ golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACk
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golang.org/x/crypto v0.0.0-20200115085410-6d4e4cb37c7d/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
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golang.org/x/crypto v0.11.0 h1:6Ewdq3tDic1mg5xRO4milcWCfMVQhI4NkqWWvqejpuA=
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golang.org/x/crypto v0.11.0/go.mod h1:xgJhtzW8F9jGdVFWZESrid1U1bjeNy4zgy5cRr/CIio=
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golang.org/x/exp v0.0.0-20230725093048-515e97ebf090 h1:Di6/M8l0O2lCLc6VVRWhgCiApHV8MnQurBnFSHsQtNY=
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golang.org/x/exp v0.0.0-20230725093048-515e97ebf090/go.mod h1:FXUEEKJgO7OQYeo8N01OfiKP8RXMtf6e8aTskBGqWdc=
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golang.org/x/net v0.0.0-20180906233101-161cd47e91fd/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
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golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
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golang.org/x/net v0.12.0 h1:cfawfvKITfUsFCeJIHJrbSxpeu/E81khclypR0GVT50=
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23
init.sql
23
init.sql
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@ -12,3 +12,26 @@ CREATE TABLE sessions(
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pubkey TEXT NOT NULL REFERENCES users(pubkey),
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session_id VARCHAR(48)
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);
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CREATE TABLE markets(
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id SERIAL PRIMARY KEY,
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description TEXT NOT NULL,
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funding BIGINT NOT NULL,
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active BOOLEAN DEFAULT true
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);
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CREATE EXTENSION "uuid-ossp";
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CREATE TABLE contracts(
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id UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
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market_id INTEGER REFERENCES markets(id),
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description TEXT NOT NULL,
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quantity DOUBLE PRECISION NOT NULL
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);
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CREATE TYPE order_side AS ENUM ('BUY', 'SELL');
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CREATE TABLE trades(
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id UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
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contract_id UUID NOT NULL REFERENCES contracts(id),
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pubkey TEXT NOT NULL REFERENCES users(pubkey),
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side ORDER_SIDE NOT NULL,
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quantity DOUBLE PRECISION NOT NULL,
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msats BIGINT NOT NULL
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);
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@ -0,0 +1,34 @@
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<!DOCTYPE html>
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<html>
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<head>
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<title>delphi.market</title>
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<link rel="icon" type="image/x-icon" href="/favicon.ico" />
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<link rel="apple-touch-icon" sizes="180x180" href="/apple-touch-icon.png" />
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<link rel="icon" type="image/png" sizes="32x32" href="/favicon-32x32.png" />
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<link rel="icon" type="image/png" sizes="16x16" href="/favicon-16x16.png" />
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<link rel="manifest" href="/site.webmanifest" />
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<link rel="stylesheet" href="/index.css" />
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<meta name="viewport" content="width=device-width, initial-scale=1" />
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<meta name="theme-color" content="#091833" />
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</head>
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<body>
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<header class="flex flex-row text-center justify-center pt-1">
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<nav>
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<a href="/">home</a>
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</nav>
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</header>
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<div class="container flex flex-column text-center">
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<code>
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<strong>
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<pre>
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_ _ ___ ____
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| || |_| | | |___ \
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|__ _| |_| |___) |
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|_| \___/|____/ </pre>
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</strong>
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</code>
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<div class="font-mono mb-1">Method Not Allowed</div>
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</div>
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</body>
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</html>
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@ -117,6 +117,10 @@ ul {
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height: 100vh;
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}
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.w-100p {
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width: 100%;
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}
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.m-auto {
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margin: auto;
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}
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@ -0,0 +1,43 @@
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.order-button {
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border: none;
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margin: auto;
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border-radius: 4px;
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font-size: 20px;
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}
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.order-form {
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display: none;
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grid-template-columns: 1fr 1fr;
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grid-template-rows: 1fr 1fr;
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}
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.sx-1 {
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margin: 0 1rem;
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padding: 0 1rem;
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}
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.yes {
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background-color: rgba(20,158,97,.24);
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color: #35df8d;
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}
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.yes:hover {
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background-color: #35df8d;
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color: white;
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}
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.yes.selected {
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background-color: #35df8d;
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color: white;
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}
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.no {
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background-color: rgba(245,57,94,.24);
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color: #ff7386;
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}
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.no:hover {
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background-color: #ff7386;
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color: white;
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}
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.no.selected {
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background-color: #ff7386;
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color: white;
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}
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@ -0,0 +1,32 @@
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package main
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import (
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"errors"
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"math"
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)
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// logarithmic market scoring rule (LMSR) market maker from Robin Hanson:
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// https://mason.gmu.edu/~rhanson/mktscore.pdf
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func BinaryLMSRBuy(invariant int, funding int, tokensAQ float64, tokensBQ float64, sats int) (float64, error) {
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k := float64(invariant)
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f := float64(funding)
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numOutcomes := 2.0
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expA := -tokensAQ / f
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expB := -tokensBQ / f
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if k != math.Pow(numOutcomes, expA)+math.Pow(numOutcomes, expB) {
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// invariant should not already be broken
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return -1, errors.New("invariant already broken")
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}
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// AMM converts order into equal amount of tokens per outcome and then solves equation to fix invariant
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// see https://docs.gnosis.io/conditionaltokens/docs/introduction3/#an-example-with-lmsr
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newTokensA := tokensAQ + float64(sats)
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newTokensB := tokensBQ + float64(sats)
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expB = -newTokensB / f
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x := newTokensA + f*math.Log(k-math.Pow(numOutcomes, expB))/math.Log(numOutcomes)
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expA = -(newTokensA - x) / f
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if k != math.Pow(numOutcomes, expA)+math.Pow(numOutcomes, expB) {
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// invariant should not be broken
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return -1, errors.New("invariant broken")
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}
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return x, nil
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}
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129
src/router.go
129
src/router.go
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@ -12,18 +12,56 @@ import (
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"github.com/labstack/echo/v4"
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"github.com/skip2/go-qrcode"
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"golang.org/x/exp/slices"
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)
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type Template struct {
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templates *template.Template
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}
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type Market struct {
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Id int
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Description string
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Funding int
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Active bool
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}
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type Contract struct {
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Id string
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MarketId int
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Description string
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Quantity float64
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}
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type MarketDataRequest struct {
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ContractId string `json:"contract_id"`
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OrderSide string `json:"side"`
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Sats int `json:"sats,omitempty"`
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Quantity float64 `json:"quantity,omitempty"`
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}
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func (t *Template) Render(w io.Writer, name string, data interface{}, c echo.Context) error {
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return t.templates.ExecuteTemplate(w, name, data)
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}
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func index(c echo.Context) error {
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return c.Render(http.StatusOK, "index.html", map[string]any{"session": c.Get("session"), "VERSION": VERSION, "COMMIT_LONG_SHA": COMMIT_LONG_SHA})
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rows, err := db.Query("SELECT id, description, funding, active FROM markets WHERE active = true")
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if err != nil {
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return err
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}
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defer rows.Close()
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var markets []Market
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for rows.Next() {
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var market Market
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rows.Scan(&market.Id, &market.Description, &market.Funding, &market.Active)
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markets = append(markets, market)
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}
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data := map[string]any{
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"session": c.Get("session"),
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"markets": markets,
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"VERSION": VERSION,
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"COMMIT_LONG_SHA": COMMIT_LONG_SHA}
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return c.Render(http.StatusOK, "index.html", data)
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}
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func login(c echo.Context) error {
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@ -131,6 +169,16 @@ func sessionHandler(next echo.HandlerFunc) echo.HandlerFunc {
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}
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}
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func sessionGuard(next echo.HandlerFunc) echo.HandlerFunc {
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return func(c echo.Context) error {
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session := c.Get("session")
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if session == nil {
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return c.Redirect(http.StatusTemporaryRedirect, "/login")
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}
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return next(c)
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}
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}
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func logout(c echo.Context) error {
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cookie, err := c.Cookie("session")
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if err != nil {
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@ -148,6 +196,85 @@ func logout(c echo.Context) error {
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return c.Redirect(http.StatusSeeOther, "/")
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}
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func market(c echo.Context) error {
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marketId := c.Param("id")
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var market Market
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err := db.QueryRow("SELECT id, description FROM markets WHERE id = $1 AND active = true", marketId).Scan(&market.Id, &market.Description)
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if err == sql.ErrNoRows {
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return echo.NewHTTPError(http.StatusNotFound, "Not Found")
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} else if err != nil {
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return err
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}
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rows, err := db.Query("SELECT id, market_id, description, quantity FROM contracts WHERE market_id = $1 ORDER BY description DESC", marketId)
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if err != nil {
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return err
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}
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defer rows.Close()
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var contracts []Contract
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for rows.Next() {
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var contract Contract
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rows.Scan(&contract.Id, &contract.MarketId, &contract.Description, &contract.Quantity)
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contracts = append(contracts, contract)
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}
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data := map[string]any{
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"session": c.Get("session"),
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"Id": market.Id,
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"Description": market.Description,
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"Contracts": contracts,
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}
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return c.Render(http.StatusOK, "binary_market.html", data)
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}
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func marketData(c echo.Context) error {
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var req MarketDataRequest
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err := c.Bind(&req)
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if err != nil {
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c.Logger().Error(err)
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return c.JSON(http.StatusBadRequest, map[string]string{"status": "ERROR", "reason": "bad request"})
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}
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marketId := c.Param("id")
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var market Market
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err = db.QueryRow("SELECT id, description, funding FROM markets WHERE id = $1 AND active = true", marketId).Scan(&market.Id, &market.Description, &market.Funding)
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if err == sql.ErrNoRows {
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return c.JSON(http.StatusBadRequest, map[string]string{"status": "ERROR", "reason": "market not found"})
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} else if err != nil {
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c.Logger().Error(err)
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return c.JSON(http.StatusInternalServerError, map[string]string{"status": "ERROR", "reason": "internal server error"})
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}
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rows, err := db.Query("SELECT id, market_id, description, quantity FROM contracts WHERE market_id = $1", marketId)
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if err != nil {
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return err
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}
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defer rows.Close()
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var contracts []Contract
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for rows.Next() {
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var contract Contract
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rows.Scan(&contract.Id, &contract.MarketId, &contract.Description, &contract.Quantity)
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contracts = append(contracts, contract)
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}
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sats := req.Sats
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quantity := req.Quantity
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// contract A is always the contract which is bought or sold
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contractAIdx := slices.IndexFunc(contracts, func(c Contract) bool { return c.Id == req.ContractId })
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contractBIdx := 0
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if contractAIdx == 0 {
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contractBIdx = 1
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}
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contractAQ := contracts[contractAIdx].Quantity
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contractBQ := contracts[contractBIdx].Quantity
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if req.OrderSide == "BUY" && sats > 0 {
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quantity, err := BinaryLMSRBuy(1, market.Funding, contractAQ, contractBQ, sats)
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if err != nil {
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return err
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}
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return c.JSON(http.StatusOK, map[string]string{"status": "OK", "quantity": fmt.Sprint(quantity)})
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}
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if req.OrderSide == "SELL" && quantity > 0 {
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// TODO implement BinaryLMSRSell
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}
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return c.JSON(http.StatusBadRequest, map[string]string{"status": "ERROR", "reason": "bad request"})
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}
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func serve500(c echo.Context) {
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f, err := os.Open("public/500.html")
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if err != nil {
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|
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@ -43,7 +43,7 @@ func init() {
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flag.Parse()
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e = echo.New()
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t = &Template{
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templates: template.Must(template.ParseGlob("template/*.html")),
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templates: template.Must(template.ParseGlob("template/**.html")),
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}
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COMMIT_LONG_SHA = execCmd("git", "rev-parse", "HEAD")
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COMMIT_SHORT_SHA = execCmd("git", "rev-parse", "--short", "HEAD")
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@ -60,6 +60,8 @@ func main() {
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e.GET("/api/login", verifyLogin)
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e.GET("/api/session", checkSession)
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e.POST("/logout", logout)
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e.GET("/market/:id", sessionGuard(market))
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e.POST("/api/market/:id/data", sessionGuard(marketData))
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e.Use(middleware.LoggerWithConfig(middleware.LoggerConfig{
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Format: "${time_custom} ${method} ${uri} ${status}\n",
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CustomTimeFormat: "2006-01-02 15:04:05.00000-0700",
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@ -0,0 +1,174 @@
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<!DOCTYPE html>
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<html>
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<head>
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<title>delphi.market</title>
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<link rel="icon" type="image/x-icon" href="/favicon.ico" />
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<link rel="apple-touch-icon" sizes="180x180" href="/apple-touch-icon.png" />
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<link rel="icon" type="image/png" sizes="32x32" href="/favicon-32x32.png" />
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<link rel="icon" type="image/png" sizes="16x16" href="/favicon-16x16.png" />
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<link rel="manifest" href="/site.webmanifest" />
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<link rel="stylesheet" href="/index.css" />
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||||
<link rel="stylesheet" href="/market.css" />
|
||||
<meta name="viewport" content="width=device-width, initial-scale=1" />
|
||||
<meta name="theme-color" content="#091833" />
|
||||
</head>
|
||||
<body>
|
||||
<header class="flex flex-row text-center justify-center pt-1">
|
||||
<nav>
|
||||
<a href="/">home</a>
|
||||
{{ if .session }}
|
||||
<form action='/logout' method='post'>
|
||||
<button type='submit'>logout</button>
|
||||
</form>
|
||||
{{ else }} <a href="/login">login</a> {{ end }}
|
||||
</nav>
|
||||
</header>
|
||||
<div class="container flex flex-column text-center">
|
||||
<code>
|
||||
<strong>
|
||||
<pre>
|
||||
_ _
|
||||
_ __ ___ __ _ _ __| | _____| |_
|
||||
| '_ ` _ \ / _` | '__| |/ / _ \ __|
|
||||
| | | | | | (_| | | | < __/ |_
|
||||
|_| |_| |_|\__,_|_| |_|\_\___|\__|</pre>
|
||||
</strong>
|
||||
</code>
|
||||
<div class="font-mono mb-1">{{.Description}}</div>
|
||||
<div class="flex flex-row justify-center mb-1">
|
||||
{{ range .Contracts }} {{ if eq .Description "YES" }}
|
||||
<button id="yes-order" class="order-button sx-1 yes">YES</button>
|
||||
{{ else }}
|
||||
<button id="no-order" class="order-button sx-1 no">NO</button>
|
||||
{{ end }}
|
||||
{{ end }}
|
||||
</div>
|
||||
{{ range .Contracts }} {{ if eq .Description "YES" }}
|
||||
<form id="yes-form" class="order-form" hidden action="/api/market/{{$.Id}}/order" method="post">
|
||||
<button id="yes-buy" type="button" class="order-button yes w-100p selected">BUY</button>
|
||||
<button id="yes-sell" type="button" class="order-button no w-100p">SELL</button>
|
||||
<input hidden name="contract_id" value="{{.Id}}" />
|
||||
<input id="yes-side" hidden name="side" value="BUY" />
|
||||
<input id="yes-quantity" type="number" name="quantity" placeholder="quantity" disabled />
|
||||
<input id="yes-sats" type="number" name="sats" placeholder="sats"/>
|
||||
<label id="yes-submit-label">BUY YES contracts</label>
|
||||
<button type="submit">SUBMIT</button>
|
||||
</form>
|
||||
{{ else }}
|
||||
<form id="no-form" class="order-form" hidden action="/api/market/{{$.Id}}/order" method="post">
|
||||
<button id="no-buy" type="button" class="order-button yes w-100p selected">BUY</button>
|
||||
<button id="no-sell" type="button" class="order-button no w-100p">SELL</button>
|
||||
<input hidden name="contract_id" value="{{.Id}}" />
|
||||
<input id="no-side" hidden name="side" value="BUY" />
|
||||
<input id="no-quantity" type="number" name="quantity" placeholder="quantity" disabled />
|
||||
<input id="no-sats" type="number" name="sats" placeholder="sats" />
|
||||
<label id="no-submit-label">BUY NO contracts</label>
|
||||
<button type="submit">SUBMIT</button>
|
||||
</form>
|
||||
{{ end }}
|
||||
{{ end }}
|
||||
</div>
|
||||
</body>
|
||||
<script>
|
||||
const yesOrderBtn = document.querySelector("#yes-order")
|
||||
const yesForm = document.querySelector("#yes-form")
|
||||
const yesBuyBtn = document.querySelector("#yes-buy")
|
||||
const yesSellBtn = document.querySelector("#yes-sell")
|
||||
const yesSideInput = document.querySelector("#yes-side")
|
||||
const yesQuantityInput = document.querySelector("#yes-quantity")
|
||||
const yesSatsInput = document.querySelector("#yes-sats")
|
||||
const yesSubmitLabel = document.querySelector("#yes-submit-label")
|
||||
|
||||
const noOrderBtn = document.querySelector("#no-order")
|
||||
const noForm = document.querySelector("#no-form")
|
||||
const noBuyBtn = document.querySelector("#no-buy")
|
||||
const noSellBtn = document.querySelector("#no-sell")
|
||||
const noSideInput = document.querySelector("#no-side")
|
||||
const noQuantityInput = document.querySelector("#no-quantity")
|
||||
const noSatsInput = document.querySelector("#no-sats")
|
||||
const noSubmitLabel = document.querySelector("#no-submit-label")
|
||||
|
||||
yesOrderBtn.onclick = function () {
|
||||
yesOrderBtn.classList.add("selected")
|
||||
yesForm.style.display = "grid"
|
||||
noOrderBtn.classList.remove("selected")
|
||||
noForm.style.display = "none"
|
||||
}
|
||||
yesBuyBtn.onclick = function () {
|
||||
yesSideInput.value = "BUY"
|
||||
yesBuyBtn.classList.add("selected")
|
||||
yesSellBtn.classList.remove("selected")
|
||||
yesSubmitLabel.textContent = 'BUY YES contracts'
|
||||
}
|
||||
yesSellBtn.onclick = function () {
|
||||
yesSideInput.value = "SELL"
|
||||
yesBuyBtn.classList.remove("selected")
|
||||
yesSellBtn.classList.add("selected")
|
||||
yesSubmitLabel.textContent = 'SELL NO contracts'
|
||||
}
|
||||
yesSatsInput.onchange = async function(e) {
|
||||
const sats = parseInt(e.target.value, 10)
|
||||
const body = {
|
||||
contract_id: "{{(index .Contracts 0).Id}}",
|
||||
sats,
|
||||
side: yesSideInput.value
|
||||
}
|
||||
const rBody = await fetch("/api/market/{{.Id}}/data", {
|
||||
method: "POST",
|
||||
headers: {
|
||||
"Content-type": "application/json"
|
||||
},
|
||||
body: JSON.stringify(body)
|
||||
})
|
||||
.then(r => r.json())
|
||||
.catch((err) => {
|
||||
console.error(err);
|
||||
return null
|
||||
})
|
||||
if (!rBody) return null;
|
||||
const quantity = rBody.quantity
|
||||
yesQuantityInput.value = quantity
|
||||
}
|
||||
noOrderBtn.onclick = function () {
|
||||
noOrderBtn.classList.add("selected")
|
||||
noForm.style.display = "grid"
|
||||
yesOrderBtn.classList.remove("selected")
|
||||
yesForm.style.display = "none"
|
||||
}
|
||||
noBuyBtn.onclick = function () {
|
||||
noSideInput.value = "BUY"
|
||||
noBuyBtn.classList.add("selected")
|
||||
noSellBtn.classList.remove("selected")
|
||||
noSubmitLabel.textContent = 'BUY NO contracts'
|
||||
}
|
||||
noSellBtn.onclick = function () {
|
||||
noSideInput.value = "SELL"
|
||||
noBuyBtn.classList.remove("selected")
|
||||
noSellBtn.classList.add("selected")
|
||||
noSubmitLabel.textContent = 'SELL YES contracts'
|
||||
}
|
||||
noSatsInput.onchange = async function(e) {
|
||||
const sats = parseInt(e.target.value, 10)
|
||||
const body = {
|
||||
contract_id: "{{(index .Contracts 1).Id}}",
|
||||
sats,
|
||||
side: noSideInput.value
|
||||
}
|
||||
const rBody = await fetch("/api/market/{{.Id}}/data", {
|
||||
method: "POST",
|
||||
headers: {
|
||||
"Content-type": "application/json"
|
||||
},
|
||||
body: JSON.stringify(body)
|
||||
})
|
||||
.then(r => r.json())
|
||||
.catch((err) => {
|
||||
console.error(err);
|
||||
return null
|
||||
})
|
||||
if (!rBody) return null;
|
||||
const quantity = rBody.quantity
|
||||
noQuantityInput.value = quantity
|
||||
}
|
||||
</script>
|
||||
</html>
|
||||
|
|
@ -35,6 +35,10 @@
|
|||
</strong>
|
||||
</code>
|
||||
<div class="font-mono mb-1">A prediction market using the lightning network [WIP]</div>
|
||||
<div class="font-mono mb-1">ACTIVE MARKETS</div>
|
||||
{{ range .markets }}
|
||||
<a href="/market/{{.Id}}">{{.Description}}</a>
|
||||
{{ end }}
|
||||
</div>
|
||||
<footer class="flex justify-center">
|
||||
<div>
|
||||
|
|
|
|||
Loading…
Reference in New Issue