Command line generated address can't recover with seed phrase, what am I missing? - NTV News 🔥

I have generated a bitcoin address using the following commands along with a ruby script for compression.

First I generate a key using echo "24 word seed phrase BIP 39" | openssl sha256

Then run the below Ruby script to compress the key

# example private key
private_key = "private key that has been generated with previous command"

# --------------------------
# Secp256k1 Curve Parameters
# --------------------------
# y^2 = x^3 + ax + b
$a = 0
$b = 7 # using global variables for convenience

# prime modulus
$p = 2 ** 256 - 2 ** 32 - 2 ** 9 - 2 ** 8 - 2 ** 7 - 2 ** 6 - 2 ** 4 - 1

# number of points on the curve
$n = 115792089237316195423570985008687907852837564279074904382605163141518161494337

# generator point (the starting point on the curve used for all calculations)
$g = {
  x: 55066263022277343669578718895168534326250603453777594175500187360389116729240,
  y: 32670510020758816978083085130507043184471273380659243275938904335757337482424,
}

# --------------------------
# Elliptic Curve Mathematics
# --------------------------
# Modular Inverse - Ruby doesn't have a built-in function for finding modular inverses, so here's one using the extended Euclidean algorithm.
def modinv(a, m = $p)
  a = a % m if a < 0 # make sure a is positive
  prevy, y = 0, 1
  while a > 1
    q = m / a
    y, prevy = prevy - q * y, y
    a, m = m % a, a
  end
  return y
end

# Double - Add a point on the curve to itself.
def double(point)
  # slope = (3x^2 + a) / 2y
  slope = ((3 * point[:x] ** 2) * modinv((2 * point[:y]))) % $p # using modular inverse to perform "division"

  # new x = slope^2 - 2x
  x = (slope ** 2 - (2 * point[:x])) % $p

  # new y = slope * (x - new x) * y
  y = (slope * (point[:x] - x) - point[:y]) % $p

  # return x, y coordinates of point
  return { x: x, y: y }
end

# Add - Add two points together.
def add(point1, point2)
  # double if both points are the same
  return double(point1) if point1 == point2

  # slope = (y1 - y2) / (x1 - x2)
  slope = ((point1[:y] - point2[:y]) * modinv(point1[:x] - point2[:x])) % $p

  # new x = slope^2 - x1 - x2
  x = (slope ** 2 - point1[:x] - point2[:x]) % $p

  # new y = slope * (x1 - new x) - y1
  y = ((slope * (point1[:x] - x)) - point1[:y]) % $p

  # return x, y coordinates of point
  return { x: x, y: y }
end

# Multiply - Use the double and add operations to quickly multiply a point by an integer (e.g. a private key).
def multiply(k, point = $g) # multiply the generator point by default
  # create a copy the initial starting point (for use in addition later on)
  current = point

  # convert integer to binary representation (for use in the double and add algorithm)
  binary = k.to_s(2)

  # double and add algorithm for fast multiplication
  binary.split("").drop(1).each do |char| # ignore first binary character
    # 0 = double
    current = double(current)

    # 1 = double and add
    if char == "1"
      current = add(current, point)
    end
  end

  # return the final point
  return current
end

# -------------------------
# Private Key To Public Key
# -------------------------
# convert private key to an integer
k = private_key.to_i(16)

# multiply generator point by this private key
point = multiply(k, $g) # this point is the public key

# convert x and y values of this point to hexadecimal
x = point[:x].to_s(16).rjust(64, "0")
y = point[:y].to_s(16).rjust(64, "0")

# uncompressed public key format (not used much these days, just showing how it looks)
public_key_uncompressed = "04" + x + y

# compressed public key format (every x value has a y that could be one of two possible points)
if (point[:y] % 2 == 0)
  prefix = "02" # if y is even
else
  prefix = "03" # if y is odd
end

public_key_compressed = prefix + x # only uses the full x coordinate

# -------
# Results
# -------
puts private_key           #=> ef235aacf90d9f4aadd8c92e4b2562e1d9eb97f0df9ba3b508258739cb013db2
puts public_key_compressed

Then hashing the key again with echo compressed key from ruby script | xxd -r -p | openssl sha256

Then echo hashed key | xxd -r -p | openssl ripemd160

And finally adding 00 to the key echo 00key | xxd -p -r | base58 -c && echo

The address I get is able to receiving funds, but I can't recover using the 24 word seed phrase using BlueWallet import function. What am I doing wrong?

https://learnmeabitcoin.com/technical/public-key Link to Ruby Script

https://medium.com/coinmonks/how-to-generate-a-bitcoin-address-step-by-step-9d7fcbf1ad0b Link to Openssl Commands

from Recent Questions - Bitcoin Stack Exchange
May 24, 2023 at 02:43AM