forked from Qortal/qortal
CalDescent
3 years ago
11 changed files with 302 additions and 9 deletions
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package org.qortal.api.model; |
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import javax.xml.bind.annotation.XmlAccessType; |
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import javax.xml.bind.annotation.XmlAccessorType; |
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import java.math.BigDecimal; |
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import java.math.BigInteger; |
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@XmlAccessorType(XmlAccessType.FIELD) |
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public class BlockMintingInfo { |
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public byte[] minterPublicKey; |
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public int minterLevel; |
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public int onlineAccountsCount; |
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public BigDecimal maxDistance; |
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public BigInteger keyDistance; |
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public double keyDistanceRatio; |
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public long timestamp; |
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public long timeDelta; |
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public BlockMintingInfo() { |
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} |
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} |
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#!/usr/bin/env bash |
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start_height=$1 |
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count=$2 |
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target=$3 |
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deviation=$4 |
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power=$5 |
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if [ -z "${start_height}" ]; then |
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echo |
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echo "Error: missing start height." |
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echo |
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echo "Usage:" |
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echo "block-timings.sh <startheight> [count] [target] [deviation] [power]" |
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echo |
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echo "startheight: a block height, preferably within the untrimmed range, to avoid data gaps" |
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echo "count: the number of blocks to request and analyse after the start height. Default: 100" |
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echo "target: the target block time in milliseconds. Originates from blockchain.json. Default: 60000" |
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echo "deviation: the allowed block time deviation in milliseconds. Originates from blockchain.json. Default: 30000" |
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echo "power: used when transforming key distance to a time offset. Originates from blockchain.json. Default: 0.2" |
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echo |
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exit |
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fi |
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count=${count:=100} |
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target=${target:=60000} |
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deviation=${deviation:=30000} |
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power=${power:=0.2} |
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finish_height=$((start_height + count - 1)) |
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height=$start_height |
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echo "Settings:" |
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echo "Target time offset: ${target}" |
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echo "Deviation: ${deviation}" |
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echo "Power transform: ${power}" |
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echo |
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function calculate_time_offset { |
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local key_distance_ratio=$1 |
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local transformed=$( echo "" | awk "END {print ${key_distance_ratio} ^ ${power}}") |
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local time_offset=$(echo "${deviation}*2*${transformed}" | bc) |
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time_offset=${time_offset%.*} |
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echo $time_offset |
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} |
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function fetch_and_process_blocks { |
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echo "Fetching blocks from height ${start_height} to ${finish_height}..." |
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echo |
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total_time_offset=0 |
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errors=0 |
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while [ "${height}" -le "${finish_height}" ]; do |
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block_minting_info=$(curl -s "http://localhost:12391/blocks/byheight/${height}/mintinginfo") |
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error=$(echo "${block_minting_info}" | jq -r .error) |
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if [ "${error}" != "null" ]; then |
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echo "Error fetching minting info for block ${height}" |
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echo |
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errors=$((errors+1)) |
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height=$((height+1)) |
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continue; |
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fi |
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# Parse minting info |
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minter_level=$(echo "${block_minting_info}" | jq -r .minterLevel) |
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online_accounts_count=$(echo "${block_minting_info}" | jq -r .onlineAccountsCount) |
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key_distance_ratio=$(echo "${block_minting_info}" | jq -r .keyDistanceRatio) |
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time_delta=$(echo "${block_minting_info}" | jq -r .timeDelta) |
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time_offset=$(calculate_time_offset "${key_distance_ratio}") |
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block_time=$((target-deviation+time_offset)) |
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echo "=== BLOCK ${height} ===" |
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echo "Minter level: ${minter_level}" |
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echo "Online accounts: ${online_accounts_count}" |
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echo "Key distance ratio: ${key_distance_ratio}" |
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echo "Time offset: ${time_offset}" |
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echo "Block time (real): ${time_delta}" |
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echo "Block time (calculated): ${block_time}" |
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if [ "${time_delta}" -ne "${block_time}" ]; then |
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echo "WARNING: Block time mismatch. This is to be expected when using custom settings." |
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fi |
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echo |
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total_time_offset=$((total_time_offset+block_time)) |
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height=$((height+1)) |
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done |
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adjusted_count=$((count-errors)) |
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if [ "${adjusted_count}" -eq 0 ]; then |
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echo "No blocks were retrieved." |
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echo |
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exit; |
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fi |
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mean_time_offset=$((total_time_offset/adjusted_count)) |
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time_offset_diff=$((mean_time_offset-target)) |
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echo "===================" |
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echo "===== SUMMARY =====" |
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echo "===================" |
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echo "Total blocks retrieved: ${adjusted_count}" |
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echo "Total blocks failed: ${errors}" |
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echo "Mean time offset: ${mean_time_offset}ms" |
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echo "Target time offset: ${target}ms" |
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echo "Difference from target: ${time_offset_diff}ms" |
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echo |
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} |
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function estimate_key_distance_ratio_for_level { |
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local level=$1 |
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local example_key_distance="0.5" |
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echo "(${example_key_distance}/${level})" |
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} |
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function estimate_block_timestamps { |
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min_block_time=9999999 |
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max_block_time=0 |
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echo "===== BLOCK TIME ESTIMATES =====" |
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for level in {1..10}; do |
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example_key_distance_ratio=$(estimate_key_distance_ratio_for_level "${level}") |
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time_offset=$(calculate_time_offset "${example_key_distance_ratio}") |
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block_time=$((target-deviation+time_offset)) |
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if [ "${block_time}" -gt "${max_block_time}" ]; then |
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max_block_time=${block_time} |
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fi |
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if [ "${block_time}" -lt "${min_block_time}" ]; then |
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min_block_time=${block_time} |
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fi |
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echo "Level: ${level}, time offset: ${time_offset}, block time: ${block_time}" |
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done |
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block_time_range=$((max_block_time-min_block_time)) |
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echo "Range: ${block_time_range}" |
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echo |
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} |
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fetch_and_process_blocks |
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estimate_block_timestamps |
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