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  def okx_signing(config, %{url: url, body: body, method: method}) do
    secret = config["okx_secret_key"]
    access_key = "your access key"

    timestamp = DateTime.utc_now() |> DateTime.truncate(:millisecond) |> DateTime.to_iso8601()
    %{path: path, query: query} = URI.new!(url)

    data = timestamp <> method <> path <> "?" <> query <> body
    sign = :crypto.mac(:hmac, :sha256, secret, data) |> Base.encode64()

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cryptopals.com

Untitled

defmodule CryptoPals do
  def base16to64(x) do
    x
    |> Base.decode16!(case: :lower)
    |> Base.encode64()

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bsv

Mix.install([
  {:bsv, "~> 2.1"}
])

Section

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curl -Lo roots.pem https://pki.google.com/roots.pem

export GRPC_DEFAULT_SSL_ROOTS_FILE_PATH="$PWD/roots.pem"

apt-get install ca-certificates

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sudo apt-get install build-essential libtool autotools-dev automake pkg-config libssl-dev libevent-dev bsdmainutils libboost-all-dev
./autogen.sh
mkdir build
cd build
../configure --disable-wallet
make

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Some token transaction lost in DragonGlass token query api.

JAM transaction: https://app.dragonglass.me/transactions/002855761648193481472999010

"validStartDate": "2022-03-25T07:31:21.472999010Z"

"consensusTimeStamp": "2022-03-25T07:31:33.792727Z"

Query with:

curl -v -H "X-API-KEY: [APIKEY]" "https://api.dragonglass.me/hedera/api/hts/tokens/0.0.127877/transfers?accountId=0.0.618675&transferAfter=2022-03-25T06:33:20Z&transferBefore=2022-03-25T09:20:00Z";

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defmodule SqlDb do
  @moduledoc """
  # Benchmark of Save and Find

  Name            ips        average  deviation         median         99th %
  btree         50.43       0.0198 s     ±6.77%       0.0197 s       0.0268 s
  list           0.85         1.18 s     ±0.28%         1.17 s         1.18 s

  Comparison:
  btree         50.43

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fn main() {
    // Linjie Zhang 2020
    //
    // 3-state busy beaver
    // https://en.wikipedia.org/wiki/Turing_machine

    let rules = vec!["A01RB", "A11LC", "B01LA", "B11RB", "C01LB", "C11RH"]
        .iter()
        .map(|x| x.chars().collect::<Vec<char>>())
        .collect::<Vec<_>>();

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fn main() {

    // Linjie Zhang 2020
    //
    // T simple turing machine
    //
    // https://plato.stanford.edu/entries/turing-machine/#DefiTuriMach

    #[derive(Debug)]
    struct Machine {

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<mxfile host="localhost" modified="2020-05-18T07:49:48.710Z" agent="5.0 (Macintosh; Intel Mac OS X 10_14_2) AppleWebKit/537.36 (KHTML, like Gecko) Code/1.45.0 Chrome/78.0.3904.130 Electron/7.2.4 Safari/537.36" etag="lm6PZiSR0-wQZ33-puXF" version="13.0.9">
    <diagram id="6hGFLwfOUW9BJ-s0fimq" name="Page-1">
        <mxGraphModel dx="483" dy="592" grid="1" gridSize="10" guides="1" tooltips="1" connect="1" arrows="1" fold="1" page="1" pageScale="1" pageWidth="827" pageHeight="1169" math="0" shadow="0">
            <root>
                <mxCell id="0"/>
                <mxCell id="1" parent="0"/>
                <mxCell id="14" style="edgeStyle=orthogonalEdgeStyle;rounded=0;orthogonalLoop=1;jettySize=auto;html=1;exitX=0;exitY=1;exitDx=0;exitDy=0;entryX=0;entryY=0;entryDx=0;entryDy=0;curved=1;" edge="1" parent="1" source="12" target="13">
                    <mxGeometry relative="1" as="geometry"/>
                </mxCell>
                <mxCell id="15" style="edgeStyle=orthogonalEdgeStyle;curved=1;rounded=0;