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# Generate the private and public keys | |
openssl ecparam -name secp256k1 -genkey -noout | openssl ec -text -noout > key | |
# Extract the public key and remove the EC prefix 0x04 | |
cat key | grep pub -A 5 | tail -n +2 | tr -d '\n[:space:]:' | sed 's/^04//' > pub | |
# Extract the private key and remove the leading zero byte | |
cat key | grep priv -A 3 | tail -n +2 | tr -d '\n[:space:]:' | sed 's/^00//' > priv | |
# Generate the hash and take the address part |
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// | |
// The new assembly support in Solidity makes writing helpers easy. | |
// Many have complained how complex it is to use `ecrecover`, especially in conjunction | |
// with the `eth_sign` RPC call. Here is a helper, which makes that a matter of a single call. | |
// | |
// Sample input parameters: | |
// (with v=0) | |
// "0x47173285a8d7341e5e972fc677286384f802f8ef42a5ec5f03bbfa254cb01fad", | |
// "0xaca7da997ad177f040240cdccf6905b71ab16b74434388c3a72f34fd25d6439346b2bac274ff29b48b3ea6e2d04c1336eaceafda3c53ab483fc3ff12fac3ebf200", | |
// "0x0e5cb767cce09a7f3ca594df118aa519be5e2b5a" |
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/** | |
* Retrieves all the rows in the active spreadsheet that contain data and logs the | |
* values for each row. | |
* For more information on using the Spreadsheet API, see | |
* https://developers.google.com/apps-script/service_spreadsheet | |
*/ | |
function readRows() { | |
var sheet = SpreadsheetApp.getActiveSheet(); | |
var rows = sheet.getDataRange(); | |
var numRows = rows.getNumRows(); |
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#!/bin/bash | |
# | |
# This is free and unencumbered software released into the public domain. | |
# | |
# Requires bc, dc, openssl, xxd | |
# | |
# by grondilu from https://bitcointalk.org/index.php?topic=10970.msg156708#msg156708 | |
base58=({1..9} {A..H} {J..N} {P..Z} {a..k} {m..z}) | |
bitcoinregex="^[$(printf "%s" "${base58[@]}")]{34}$" |
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/***************************************************************************** | |
* QuantCup 1: Price-Time Matching Engine | |
* | |
* Submitted by: voyager | |
* | |
* Design Overview: | |
* In this implementation, the limit order book is represented using | |
* a flat linear array (pricePoints), indexed by the numeric price value. | |
* Each entry in this array corresponds to a specific price point and holds | |
* an instance of struct pricePoint. This data structure maintains a list |