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Fix Bitcoin Tracker example's Coindesk API URL #1106

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Fix Bitcoin Tracker example's Coindesk API URL #1106

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077d2b0
Update to use CoinDesk's Min API
newfurniturey Mar 1, 2025
6888591
starlark doesn't support direct i/o file reads...
newfurniturey Mar 1, 2025
784529e
update BTC tutorial
newfurniturey Mar 1, 2025
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20 changes: 10 additions & 10 deletions docs/tutorial.md
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -54,8 +54,8 @@ with the `font` parameter. You can read more about the available fonts

To get closer to a truly useful Pixlet app, we'll be pulling in some
Bitcoin data. CoinDesk's [Bitcoin Price Index
API](https://www.coindesk.com/coindesk-api) is free to use and
requires no authentication. We'll use Starlib's [http
API](https://developers.coindesk.com/documentation/legacy/Price/SingleSymbolPriceEndpoint/)
is free to use and requires no authentication. We'll use Starlib's [http
module](https://github.com/qri-io/starlib/tree/master/http) to
retrieve the data.

Expand All @@ -68,14 +68,14 @@ anything but the simplest applet.
load("render.star", "render")
load("http.star", "http")

COINDESK_PRICE_URL = "https://api.coindesk.com/v1/bpi/currentprice.json"
COINDESK_PRICE_URL = "https://min-api.cryptocompare.com/data/price?fsym=BTC&tsyms=USD"

def main():
rep = http.get(COINDESK_PRICE_URL)
if rep.status_code != 200:
fail("Coindesk request failed with status %d", rep.status_code)

rate = rep.json()["bpi"]["USD"]["rate_float"]
rate = rep.json()["USD"]

return render.Root(
child = render.Text("BTC: %d USD" % rate)
Expand Down Expand Up @@ -113,7 +113,7 @@ load("render.star", "render")
load("http.star", "http")
load("encoding/base64.star", "base64")

COINDESK_PRICE_URL = "https://api.coindesk.com/v1/bpi/currentprice.json"
COINDESK_PRICE_URL = "https://min-api.cryptocompare.com/data/price?fsym=BTC&tsyms=USD"

# Load Bitcoin icon from base64 encoded data
BTC_ICON = base64.decode("""
Expand All @@ -128,7 +128,7 @@ def main():
if rep.status_code != 200:
fail("CoinDesk request failed with status %d", rep.status_code)

rate = rep.json()["bpi"]["USD"]["rate_float"]
rate = rep.json()["USD"]

return render.Root(
child = render.Row( # Row lays out its children horizontally
Expand Down Expand Up @@ -166,7 +166,7 @@ load("render.star", "render")
load("http.star", "http")
load("encoding/base64.star", "base64")

COINDESK_PRICE_URL = "https://api.coindesk.com/v1/bpi/currentprice.json"
COINDESK_PRICE_URL = "https://min-api.cryptocompare.com/data/price?fsym=BTC&tsyms=USD"

BTC_ICON = base64.decode("""
iVBORw0KGgoAAAANSUhEUgAAABEAAAARCAYAAAA7bUf6AAAAlklEQVQ4T2NkwAH+H2T/jy7FaP+
Expand All @@ -180,7 +180,7 @@ def main():
if rep.status_code != 200:
fail("Coindesk request failed with status %d", rep.status_code)

rate = rep.json()["bpi"]["USD"]["rate_float"]
rate = rep.json()["USD"]

return render.Root(
child = render.Box( # This Box exists to provide vertical centering
Expand Down Expand Up @@ -216,7 +216,7 @@ load("http.star", "http")
load("encoding/base64.star", "base64")
load("cache.star", "cache")

COINDESK_PRICE_URL = "https://api.coindesk.com/v1/bpi/currentprice.json"
COINDESK_PRICE_URL = "https://min-api.cryptocompare.com/data/price?fsym=BTC&tsyms=USD"

BTC_ICON = base64.decode("""
iVBORw0KGgoAAAANSUhEUgAAABEAAAARCAYAAAA7bUf6AAAAlklEQVQ4T2NkwAH+H2T/jy7FaP+
Expand All @@ -235,7 +235,7 @@ def main():
rep = http.get(COINDESK_PRICE_URL)
if rep.status_code != 200:
fail("Coindesk request failed with status %d", rep.status_code)
rate = rep.json()["bpi"]["USD"]["rate_float"]
rate = rep.json()["USD"]
cache.set("btc_rate", str(int(rate)), ttl_seconds=240)

return render.Root(
Expand Down
14 changes: 10 additions & 4 deletions examples/bitcoin/bitcoin.star
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -1,16 +1,22 @@
load("http.star", "http")
load("icon.png", icon = "file")
load("encoding/base64.star", "base64")
load("render.star", "render")

COINDESK_PRICE_URL = "https://api.coindesk.com/v1/bpi/currentprice.json"
COINDESK_PRICE_URL = "https://min-api.cryptocompare.com/data/price?fsym=BTC&tsyms=USD"

BTC_ICON = icon.readall()
# Load Bitcoin icon from base64 encoded data
BTC_ICON = base64.decode("""
iVBORw0KGgoAAAANSUhEUgAAABEAAAARCAYAAAA7bUf6AAAAlklEQVQ4T2NkwAH+H2T/jy7FaP+
TEZtyDEG4Zi0TTPXXzoDF0A1DMQRsADbN6MZdO4NiENwQbAbERh1lWLzMmgFGo5iFZBDYEFwuwG
sISCPUIKyGgDRjAyBXYXMNIz5XgDQga8TpLboYgux8DO/AwoUuLiEqTLBFMcmxQ7V0gssgklIsL
AYozjsoBoE45OZi5DRBSnkCAMLhlPBiQGHlAAAAAElFTkSuQmCC
""")

def main():
rep = http.get(COINDESK_PRICE_URL, ttl_seconds = 240)
if rep.status_code != 200:
fail("Coindesk request failed with status %d", rep.status_code)
rate = rep.json()["bpi"]["USD"]["rate_float"]
rate = rep.json()["USD"]

return render.Root(
child = render.Box(
Expand Down