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delphi.market
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Add binary market page

This commit is contained in:
ekzyis 2023-09-09 22:52:50 +02:00
parent fbab0b4975
commit 87ce57c862
11 changed files with 454 additions and 8 deletions
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9
go.mod
View File

@ -3,21 +3,22 @@ module delphi.market
go 1.20 go 1.20
require ( require (
github.com/btcsuite/btcd/btcec/v2 v2.3.2 github.com/btcsuite/btcd/btcec/v2 v2.2.2
github.com/btcsuite/btcutil v1.0.2 github.com/btcsuite/btcutil v1.0.2
github.com/joho/godotenv v1.5.1
github.com/labstack/echo/v4 v4.11.1 github.com/labstack/echo/v4 v4.11.1
github.com/lib/pq v1.10.9
github.com/namsral/flag v1.7.4-pre
github.com/skip2/go-qrcode v0.0.0-20200617195104-da1b6568686e github.com/skip2/go-qrcode v0.0.0-20200617195104-da1b6568686e
golang.org/x/exp v0.0.0-20230725093048-515e97ebf090
) )
require ( require (
github.com/decred/dcrd/dcrec/secp256k1/v4 v4.2.0 // indirect github.com/decred/dcrd/dcrec/secp256k1/v4 v4.2.0 // indirect
github.com/golang-jwt/jwt v3.2.2+incompatible // indirect github.com/golang-jwt/jwt v3.2.2+incompatible // indirect
github.com/joho/godotenv v1.5.1 // indirect
github.com/labstack/gommon v0.4.0 // indirect github.com/labstack/gommon v0.4.0 // indirect
github.com/lib/pq v1.10.9 // indirect
github.com/mattn/go-colorable v0.1.13 // indirect github.com/mattn/go-colorable v0.1.13 // indirect
github.com/mattn/go-isatty v0.0.19 // indirect github.com/mattn/go-isatty v0.0.19 // indirect
github.com/namsral/flag v1.7.4-pre // indirect
github.com/valyala/bytebufferpool v1.0.0 // indirect github.com/valyala/bytebufferpool v1.0.0 // indirect
github.com/valyala/fasttemplate v1.2.2 // indirect github.com/valyala/fasttemplate v1.2.2 // indirect
golang.org/x/crypto v0.11.0 // indirect golang.org/x/crypto v0.11.0 // indirect

6
go.sum
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@ -1,7 +1,7 @@
github.com/aead/siphash v1.0.1/go.mod h1:Nywa3cDsYNNK3gaciGTWPwHt0wlpNV15vwmswBAUSII= github.com/aead/siphash v1.0.1/go.mod h1:Nywa3cDsYNNK3gaciGTWPwHt0wlpNV15vwmswBAUSII=
github.com/btcsuite/btcd v0.20.1-beta/go.mod h1:wVuoA8VJLEcwgqHBwHmzLRazpKxTv13Px/pDuV7OomQ= github.com/btcsuite/btcd v0.20.1-beta/go.mod h1:wVuoA8VJLEcwgqHBwHmzLRazpKxTv13Px/pDuV7OomQ=
github.com/btcsuite/btcd/btcec/v2 v2.3.2 h1:5n0X6hX0Zk+6omWcihdYvdAlGf2DfasC0GMf7DClJ3U= github.com/btcsuite/btcd/btcec/v2 v2.2.2 h1:5uxe5YjoCq+JeOpg0gZSNHuFgeogrocBYxvg6w9sAgc=
github.com/btcsuite/btcd/btcec/v2 v2.3.2/go.mod h1:zYzJ8etWJQIv1Ogk7OzpWjowwOdXY1W/17j2MW85J04= github.com/btcsuite/btcd/btcec/v2 v2.2.2/go.mod h1:9/CSmJxmuvqzX9Wh2fXMWToLOHhPd11lSPuIupwTkI8=
github.com/btcsuite/btclog v0.0.0-20170628155309-84c8d2346e9f/go.mod h1:TdznJufoqS23FtqVCzL0ZqgP5MqXbb4fg/WgDys70nA= github.com/btcsuite/btclog v0.0.0-20170628155309-84c8d2346e9f/go.mod h1:TdznJufoqS23FtqVCzL0ZqgP5MqXbb4fg/WgDys70nA=
github.com/btcsuite/btcutil v0.0.0-20190425235716-9e5f4b9a998d/go.mod h1:+5NJ2+qvTyV9exUAL/rxXi3DcLg2Ts+ymUAY5y4NvMg= github.com/btcsuite/btcutil v0.0.0-20190425235716-9e5f4b9a998d/go.mod h1:+5NJ2+qvTyV9exUAL/rxXi3DcLg2Ts+ymUAY5y4NvMg=
github.com/btcsuite/btcutil v1.0.2 h1:9iZ1Terx9fMIOtq1VrwdqfsATL9MC2l8ZrUY6YZ2uts= github.com/btcsuite/btcutil v1.0.2 h1:9iZ1Terx9fMIOtq1VrwdqfsATL9MC2l8ZrUY6YZ2uts=
@ -62,6 +62,8 @@ golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACk
golang.org/x/crypto v0.0.0-20200115085410-6d4e4cb37c7d/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto= golang.org/x/crypto v0.0.0-20200115085410-6d4e4cb37c7d/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
golang.org/x/crypto v0.11.0 h1:6Ewdq3tDic1mg5xRO4milcWCfMVQhI4NkqWWvqejpuA= golang.org/x/crypto v0.11.0 h1:6Ewdq3tDic1mg5xRO4milcWCfMVQhI4NkqWWvqejpuA=
golang.org/x/crypto v0.11.0/go.mod h1:xgJhtzW8F9jGdVFWZESrid1U1bjeNy4zgy5cRr/CIio= golang.org/x/crypto v0.11.0/go.mod h1:xgJhtzW8F9jGdVFWZESrid1U1bjeNy4zgy5cRr/CIio=
golang.org/x/exp v0.0.0-20230725093048-515e97ebf090 h1:Di6/M8l0O2lCLc6VVRWhgCiApHV8MnQurBnFSHsQtNY=
golang.org/x/exp v0.0.0-20230725093048-515e97ebf090/go.mod h1:FXUEEKJgO7OQYeo8N01OfiKP8RXMtf6e8aTskBGqWdc=
golang.org/x/net v0.0.0-20180906233101-161cd47e91fd/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4= golang.org/x/net v0.0.0-20180906233101-161cd47e91fd/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg= golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
golang.org/x/net v0.12.0 h1:cfawfvKITfUsFCeJIHJrbSxpeu/E81khclypR0GVT50= golang.org/x/net v0.12.0 h1:cfawfvKITfUsFCeJIHJrbSxpeu/E81khclypR0GVT50=

23
init.sql
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@ -12,3 +12,26 @@ CREATE TABLE sessions(
pubkey TEXT NOT NULL REFERENCES users(pubkey), pubkey TEXT NOT NULL REFERENCES users(pubkey),
session_id VARCHAR(48) session_id VARCHAR(48)
); );
CREATE TABLE markets(
id SERIAL PRIMARY KEY,
description TEXT NOT NULL,
funding BIGINT NOT NULL,
active BOOLEAN DEFAULT true
);
CREATE EXTENSION "uuid-ossp";
CREATE TABLE contracts(
id UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
market_id INTEGER REFERENCES markets(id),
description TEXT NOT NULL,
quantity DOUBLE PRECISION NOT NULL
);
CREATE TYPE order_side AS ENUM ('BUY', 'SELL');
CREATE TABLE trades(
id UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
contract_id UUID NOT NULL REFERENCES contracts(id),
pubkey TEXT NOT NULL REFERENCES users(pubkey),
side ORDER_SIDE NOT NULL,
quantity DOUBLE PRECISION NOT NULL,
msats BIGINT NOT NULL
);

34
public/405.html Normal file
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@ -0,0 +1,34 @@
<!DOCTYPE html>
<html>
<head>
<title>delphi.market</title>
<link rel="icon" type="image/x-icon" href="/favicon.ico" />
<link rel="apple-touch-icon" sizes="180x180" href="/apple-touch-icon.png" />
<link rel="icon" type="image/png" sizes="32x32" href="/favicon-32x32.png" />
<link rel="icon" type="image/png" sizes="16x16" href="/favicon-16x16.png" />
<link rel="manifest" href="/site.webmanifest" />
<link rel="stylesheet" href="/index.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>
</nav>
</header>
<div class="container flex flex-column text-center">
<code>
<strong>
<pre>
_ _ ___ ____
| || | / _ \| ___|
| || |_| | | |___ \
|__ _| |_| |___) |
|_| \___/|____/ </pre>
</strong>
</code>
<div class="font-mono mb-1">Method Not Allowed</div>
</div>
</body>
</html>

4
public/index.css
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@ -117,6 +117,10 @@ ul {
height: 100vh; height: 100vh;
} }
.w-100p {
width: 100%;
}
.m-auto { .m-auto {
margin: auto; margin: auto;
} }

43
public/market.css Normal file
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@ -0,0 +1,43 @@
.order-button {
border: none;
margin: auto;
border-radius: 4px;
font-size: 20px;
}
.order-form {
display: none;
grid-template-columns: 1fr 1fr;
grid-template-rows: 1fr 1fr;
}
.sx-1 {
margin: 0 1rem;
padding: 0 1rem;
}
.yes {
background-color: rgba(20,158,97,.24);
color: #35df8d;
}
.yes:hover {
background-color: #35df8d;
color: white;
}
.yes.selected {
background-color: #35df8d;
color: white;
}
.no {
background-color: rgba(245,57,94,.24);
color: #ff7386;
}
.no:hover {
background-color: #ff7386;
color: white;
}
.no.selected {
background-color: #ff7386;
color: white;
}

32
src/market.go Normal file
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@ -0,0 +1,32 @@
package main
import (
"errors"
"math"
)
// logarithmic market scoring rule (LMSR) market maker from Robin Hanson:
// https://mason.gmu.edu/~rhanson/mktscore.pdf
func BinaryLMSRBuy(invariant int, funding int, tokensAQ float64, tokensBQ float64, sats int) (float64, error) {
k := float64(invariant)
f := float64(funding)
numOutcomes := 2.0
expA := -tokensAQ / f
expB := -tokensBQ / f
if k != math.Pow(numOutcomes, expA)+math.Pow(numOutcomes, expB) {
// invariant should not already be broken
return -1, errors.New("invariant already broken")
}
// AMM converts order into equal amount of tokens per outcome and then solves equation to fix invariant
// see https://docs.gnosis.io/conditionaltokens/docs/introduction3/#an-example-with-lmsr
newTokensA := tokensAQ + float64(sats)
newTokensB := tokensBQ + float64(sats)
expB = -newTokensB / f
x := newTokensA + f*math.Log(k-math.Pow(numOutcomes, expB))/math.Log(numOutcomes)
expA = -(newTokensA - x) / f
if k != math.Pow(numOutcomes, expA)+math.Pow(numOutcomes, expB) {
// invariant should not be broken
return -1, errors.New("invariant broken")
}
return x, nil
}

129
src/router.go
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@ -12,18 +12,56 @@ import (
"github.com/labstack/echo/v4" "github.com/labstack/echo/v4"
"github.com/skip2/go-qrcode" "github.com/skip2/go-qrcode"
"golang.org/x/exp/slices"
) )
type Template struct { type Template struct {
templates *template.Template templates *template.Template
} }
type Market struct {
Id int
Description string
Funding int
Active bool
}
type Contract struct {
Id string
MarketId int
Description string
Quantity float64
}
type MarketDataRequest struct {
ContractId string `json:"contract_id"`
OrderSide string `json:"side"`
Sats int `json:"sats,omitempty"`
Quantity float64 `json:"quantity,omitempty"`
}
func (t *Template) Render(w io.Writer, name string, data interface{}, c echo.Context) error { func (t *Template) Render(w io.Writer, name string, data interface{}, c echo.Context) error {
return t.templates.ExecuteTemplate(w, name, data) return t.templates.ExecuteTemplate(w, name, data)
} }
func index(c echo.Context) error { func index(c echo.Context) error {
return c.Render(http.StatusOK, "index.html", map[string]any{"session": c.Get("session"), "VERSION": VERSION, "COMMIT_LONG_SHA": COMMIT_LONG_SHA}) rows, err := db.Query("SELECT id, description, funding, active FROM markets WHERE active = true")
if err != nil {
return err
}
defer rows.Close()
var markets []Market
for rows.Next() {
var market Market
rows.Scan(&market.Id, &market.Description, &market.Funding, &market.Active)
markets = append(markets, market)
}
data := map[string]any{
"session": c.Get("session"),
"markets": markets,
"VERSION": VERSION,
"COMMIT_LONG_SHA": COMMIT_LONG_SHA}
return c.Render(http.StatusOK, "index.html", data)
} }
func login(c echo.Context) error { func login(c echo.Context) error {
@ -131,6 +169,16 @@ func sessionHandler(next echo.HandlerFunc) echo.HandlerFunc {
} }
} }
func sessionGuard(next echo.HandlerFunc) echo.HandlerFunc {
return func(c echo.Context) error {
session := c.Get("session")
if session == nil {
return c.Redirect(http.StatusTemporaryRedirect, "/login")
}
return next(c)
}
}
func logout(c echo.Context) error { func logout(c echo.Context) error {
cookie, err := c.Cookie("session") cookie, err := c.Cookie("session")
if err != nil { if err != nil {
@ -148,6 +196,85 @@ func logout(c echo.Context) error {
return c.Redirect(http.StatusSeeOther, "/") return c.Redirect(http.StatusSeeOther, "/")
} }
func market(c echo.Context) error {
marketId := c.Param("id")
var market Market
err := db.QueryRow("SELECT id, description FROM markets WHERE id = $1 AND active = true", marketId).Scan(&market.Id, &market.Description)
if err == sql.ErrNoRows {
return echo.NewHTTPError(http.StatusNotFound, "Not Found")
} else if err != nil {
return err
}
rows, err := db.Query("SELECT id, market_id, description, quantity FROM contracts WHERE market_id = $1 ORDER BY description DESC", marketId)
if err != nil {
return err
}
defer rows.Close()
var contracts []Contract
for rows.Next() {
var contract Contract
rows.Scan(&contract.Id, &contract.MarketId, &contract.Description, &contract.Quantity)
contracts = append(contracts, contract)
}
data := map[string]any{
"session": c.Get("session"),
"Id": market.Id,
"Description": market.Description,
"Contracts": contracts,
}
return c.Render(http.StatusOK, "binary_market.html", data)
}
func marketData(c echo.Context) error {
var req MarketDataRequest
err := c.Bind(&req)
if err != nil {
c.Logger().Error(err)
return c.JSON(http.StatusBadRequest, map[string]string{"status": "ERROR", "reason": "bad request"})
}
marketId := c.Param("id")
var market Market
err = db.QueryRow("SELECT id, description, funding FROM markets WHERE id = $1 AND active = true", marketId).Scan(&market.Id, &market.Description, &market.Funding)
if err == sql.ErrNoRows {
return c.JSON(http.StatusBadRequest, map[string]string{"status": "ERROR", "reason": "market not found"})
} else if err != nil {
c.Logger().Error(err)
return c.JSON(http.StatusInternalServerError, map[string]string{"status": "ERROR", "reason": "internal server error"})
}
rows, err := db.Query("SELECT id, market_id, description, quantity FROM contracts WHERE market_id = $1", marketId)
if err != nil {
return err
}
defer rows.Close()
var contracts []Contract
for rows.Next() {
var contract Contract
rows.Scan(&contract.Id, &contract.MarketId, &contract.Description, &contract.Quantity)
contracts = append(contracts, contract)
}
sats := req.Sats
quantity := req.Quantity
// contract A is always the contract which is bought or sold
contractAIdx := slices.IndexFunc(contracts, func(c Contract) bool { return c.Id == req.ContractId })
contractBIdx := 0
if contractAIdx == 0 {
contractBIdx = 1
}
contractAQ := contracts[contractAIdx].Quantity
contractBQ := contracts[contractBIdx].Quantity
if req.OrderSide == "BUY" && sats > 0 {
quantity, err := BinaryLMSRBuy(1, market.Funding, contractAQ, contractBQ, sats)
if err != nil {
return err
}
return c.JSON(http.StatusOK, map[string]string{"status": "OK", "quantity": fmt.Sprint(quantity)})
}
if req.OrderSide == "SELL" && quantity > 0 {
// TODO implement BinaryLMSRSell
}
return c.JSON(http.StatusBadRequest, map[string]string{"status": "ERROR", "reason": "bad request"})
}
func serve500(c echo.Context) { func serve500(c echo.Context) {
f, err := os.Open("public/500.html") f, err := os.Open("public/500.html")
if err != nil { if err != nil {

4
src/server.go
View File

@ -43,7 +43,7 @@ func init() {
flag.Parse() flag.Parse()
e = echo.New() e = echo.New()
t = &Template{ t = &Template{
templates: template.Must(template.ParseGlob("template/*.html")), templates: template.Must(template.ParseGlob("template/**.html")),
} }
COMMIT_LONG_SHA = execCmd("git", "rev-parse", "HEAD") COMMIT_LONG_SHA = execCmd("git", "rev-parse", "HEAD")
COMMIT_SHORT_SHA = execCmd("git", "rev-parse", "--short", "HEAD") COMMIT_SHORT_SHA = execCmd("git", "rev-parse", "--short", "HEAD")
@ -60,6 +60,8 @@ func main() {
e.GET("/api/login", verifyLogin) e.GET("/api/login", verifyLogin)
e.GET("/api/session", checkSession) e.GET("/api/session", checkSession)
e.POST("/logout", logout) e.POST("/logout", logout)
e.GET("/market/:id", sessionGuard(market))
e.POST("/api/market/:id/data", sessionGuard(marketData))
e.Use(middleware.LoggerWithConfig(middleware.LoggerConfig{ e.Use(middleware.LoggerWithConfig(middleware.LoggerConfig{
Format: "${time_custom} ${method} ${uri} ${status}\n", Format: "${time_custom} ${method} ${uri} ${status}\n",
CustomTimeFormat: "2006-01-02 15:04:05.00000-0700", CustomTimeFormat: "2006-01-02 15:04:05.00000-0700",

174
template/binary_market.html Normal file
View File

@ -0,0 +1,174 @@
<!DOCTYPE html>
<html>
<head>
<title>delphi.market</title>
<link rel="icon" type="image/x-icon" href="/favicon.ico" />
<link rel="apple-touch-icon" sizes="180x180" href="/apple-touch-icon.png" />
<link rel="icon" type="image/png" sizes="32x32" href="/favicon-32x32.png" />
<link rel="icon" type="image/png" sizes="16x16" href="/favicon-16x16.png" />
<link rel="manifest" href="/site.webmanifest" />
<link rel="stylesheet" href="/index.css" />
<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>

4
template/index.html
View File

@ -35,6 +35,10 @@
</strong> </strong>
</code> </code>
<div class="font-mono mb-1">A prediction market using the lightning network [WIP]</div> <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> </div>
<footer class="flex justify-center"> <footer class="flex justify-center">
<div> <div>