Store and display native coin market cap from the DB (#7585)
* Store and display market cap from the DB * Fix reviwer comments * Fix reviewer comment * Fix reviewer comments * Process reviwer comments * Fix failing incompatible test * Fix test * Fix history_chart.js Return available_supply for backward compatibilityfix-missing-ranges-collector-test
Victor Baranov
1 year ago
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GitHub
parent
ed4553daf9
commit
171a81a45b
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defmodule Explorer.Market.History.Source.MarketCap do |
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@moduledoc """ |
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Interface for a source that allows for fetching of market cap history. |
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""" |
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@typedoc """ |
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Record of market values for a specific date. |
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""" |
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@type record :: %{ |
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date: Date.t(), |
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market_cap: Decimal.t() |
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} |
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@doc """ |
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Fetch history for a specified amount of days in the past. |
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""" |
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@callback fetch_market_cap() :: {:ok, [record()]} | :error |
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end |
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defmodule Explorer.Market.History.Source.MarketCap.CoinGecko do |
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@moduledoc """ |
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Adapter for fetching current market from CoinGecko. |
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The current market is fetched for the configured coin. You can specify a |
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different coin by changing the targeted coin. |
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# In config.exs |
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config :explorer, coin: "POA" |
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""" |
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alias Explorer.ExchangeRates.Source |
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alias Explorer.ExchangeRates.Source.CoinGecko, as: ExchangeRatesSourceCoinGecko |
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alias Explorer.Market.History.Source.MarketCap, as: SourceMarketCap |
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@behaviour SourceMarketCap |
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@impl SourceMarketCap |
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def fetch_market_cap do |
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url = ExchangeRatesSourceCoinGecko.source_url() |
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if url do |
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case Source.http_request(url, ExchangeRatesSourceCoinGecko.headers()) do |
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{:ok, data} -> |
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result = |
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data |
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|> format_data() |
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{:ok, result} |
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_ -> |
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:error |
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end |
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else |
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:error |
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end |
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end |
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@spec date(String.t()) :: Date.t() |
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defp date(date_time_string) do |
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with {:ok, datetime, _} <- DateTime.from_iso8601(date_time_string) do |
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datetime |
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|> DateTime.to_date() |
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end |
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end |
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@spec format_data(term()) :: SourceMarketCap.record() | nil |
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defp format_data(nil), do: nil |
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defp format_data(data) do |
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market_data = data["market_data"] |
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market_cap = market_data["market_cap"] |
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%{ |
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market_cap: Decimal.new(to_string(market_cap["usd"])), |
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date: date(data["last_updated"]) |
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} |
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end |
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end |
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@ -0,0 +1,9 @@ |
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defmodule Explorer.Repo.Migrations.MarketHistoryAddMarketCap do |
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use Ecto.Migration |
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def change do |
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alter table(:market_history) do |
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add(:market_cap, :decimal) |
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end |
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end |
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end |
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