SmaugPool

Space with BitcoinOS Founder Edan Yago & Cardano community

• Introduction
• How was your day?
• When did you start Sovryn and what was really the goal of Sovryn?
• How BOS even came to be involved with Cardano
• Why Cardano?
• So what is the first chain that you guys are going to build this Bitcoin integration on?
• Are you going to use the BTC-OS token to incentivize Bitcoin liquidity on Cardano?
• Are Sovryn an incubator or an investor?

SmaugPool

-- Cardano load calculation

-- Note: Protocol parameters are hardcoded to simplify understanding.
-- In practice, parameters should be retrieved for each block to get
-- exact values after parameter changes.

-- 24 hours load
SELECT SUM(load)/COUNT(id) FROM (SELECT block.id,GREATEST(block.size::decimal/90112,SUM(unit_steps)::decimal/20000000000, SUM(unit_mem)::decimal/62000000) AS load FROM block join tx ON tx.block_id=block.id JOIN redeemer ON redeemer.tx_id=tx.id WHERE time > (NOW() AT TIME ZONE 'UTC' - INTERVAL '1 DAY') GROUP BY block.id) s;

-- 1 hour load

SmaugPool

#!/usr/bin/env python3

import requests, itertools

total = 0
for epoch in itertools.count(1):
    response = requests.head(f"https://files.old-faithful.net/{epoch}/epoch-{epoch}.car")
    if response.status_code == 200:
        bytes = int(response.headers["Content-Length"])
        total += bytes

SmaugPool

#!/usr/bin/python3

import sys, crc8, bitstring

label = int(sys.argv[1])
hash = crc8.crc8(label.to_bytes(2, 'big'))
prefix = bitstring.pack('uint:4, uint:16, bytes:1, uint:4', 0, label, hash.digest(), 0)

print(f"{label}: {prefix.tobytes().hex()}")

SmaugPool

ticker_in,hash_in,ticker_out,hash_out,ada
MIN,ec3308cedfbe904927d51f9a0d9cb93492da29e22e32900f85a15d8c,ARBP,30b950b3afb549a467966978c67e2b8c0e03f7e2776e9a7a84a265ac,113562500
ARBP,30b950b3afb549a467966978c67e2b8c0e03f7e2776e9a7a84a265ac,MIN,ec3308cedfbe904927d51f9a0d9cb93492da29e22e32900f85a15d8c,112313015
RETIR,e778b14f2470ba19be2bcf811837d1f19a9cc912ff2bb6a642f6dd90,ADALO,cdb10209d937fc1559c635e35b9147febde5307b4a7d276f868775cd,73921550
SWM08,9b9f891c4d56f5ce7a3b807dda4253bafdd0c439f46dc037d893a1b1,EMUR8,0ef7aa564933ce75b695cdad66be4a39b43a22726de7c58908e0e033,70186781
RETIR,53195c685e224f2aed5dd8b32ac8eb9a9b569adf05a9300962f3bef5,ADALO,cdb10209d937fc1559c635e35b9147febde5307b4a7d276f868775cd,39701957
SWM08,9b9f891c4d56f5ce7a3b807dda4253bafdd0c439f46dc037d893a1b1,EMUR7,8efb053977341471256685b1069d67f4aca7166bc3f94e27ebad217f,35000001
SKY,4511bcca3896bcb6d43b66fb89fe079f00f44bed505c9ca232704dc9,WAV8,ea00ab4ff7004cc9aafe7a32106afd1e55d5f1c6b5a63224219a78b6,22656425
RETIR,e778b14f2470ba19be2bcf811837d1f19a9cc9

SmaugPool

SELECT
    ticker_name AS ticker,
    VIEW,
    count AS blocks,
    empty_pct AS empty_pct
FROM ( SELECT DISTINCT ON (off_chain_pool_data.pool_id)
        ticker_name,
        VIEW,
        count,
        round(100 * avg, 1) || '%' AS empty_pct

SmaugPool

Smart Contracts on Cardano are Plutus scripts. We often talk about the size of transactions and blocks compared to the maximum currently authorized by the protocol parameters, but scripts are also limited in CPU and memory units.

Here is the description of those 3 properties from Cardano docs:

• The total on-chain transaction size in bytes: a simple transaction, for example, is around 300 bytes, one with metadata is around 650 bytes, and Plutus scripts are typically 4,000-8,000 bytes (future optimizations and improvements will reduce this).
• The number of computational (CPU) steps that the script uses: each step represents 1 picosecond of execution time on a benchmark machine. Typical scripts should consume less than 1,000,000,000 (1 millisecond).
• The number of memory units that the script uses: this represents the number of bytes that the script allocates. Typical scripts should consume less than 1,000,000 memory units (

SmaugPool

General NFT Marketplaces

CNFT.io

addr1wx38kptjhuurcag7zdvh5cq98rjxt0ulf6ed7jtmz5gpkfcgjyyx3

Cardanoscan pool.pm

Genesis House

SmaugPool

WITH stake AS
  (SELECT d1.addr_id
   FROM delegation d1, pool_hash
   WHERE pool_hash.id=d1.pool_hash_id
     AND pool_hash.hash_raw='\xabacadaba9f12a8b5382fc370e4e7e69421fb59831bb4ecca3a11d9b'
     AND NOT EXISTS
       (SELECT TRUE
        FROM delegation d2
        WHERE d2.addr_id=d1.addr_id 
          AND d2.tx_id>d1.tx_id)

SmaugPool

for <[email protected]>; Sun, 22 Nov 2020 20:27:20 +0000 (UTC)

Hi,

As a pool operator concerned by the effectiveness of the Sybil attack you started testing during ITN and the similar strategy you use on mainnet, I have the following questions:

Hi Smaug,