Quote from: 7xminer on April 20, 2025, 07:06:49 PM

Someone could explain me the "logic" behind WIF generation? I know that is random. But to check for the solution you would need to do:

WIF -> PVK -> ECC -> PUB -> SHA -> RIPE. No?

Why add another step if you can go from PVK forward? Huh

Making WIF

Code:

import hashlib
import base58

# Private key in hexadecimal format
private_key_hex = "00000000000000000000000000000000000000000000000354d62e5f7a0d2eb2"

# Step 1: Convert private key from hex to bytes
private_key_bytes = bytes.fromhex(private_key_hex)

# Step 2: Add the WIF prefix byte (0x80 for mainnet)
extended_key = b'\x80' + private_key_bytes

# Step 3: Append the compression flag (0x01)
extended_key += b'\x01'

# Step 4: Calculate the checksum (double SHA-256)
checksum = hashlib.sha256(hashlib.sha256(extended_key).digest()).digest()[:4]

# Step 5: Append the checksum to the extended key
wif_bytes = extended_key + checksum

# Step 6: Encode in Base58
wif_compressed = base58.b58encode(wif_bytes).decode()

print("Compressed WIF:", wif_compressed)

Reverse process

Code:

import base58
import hashlib

# Step 1: Decode WIF from Base58
wif = "KwDiBf89QgGbjEhKnhXJuH7LrciVrZi3qZxidKgPHongbFoiMWNX"
decoded_wif = base58.b58decode(wif)

# Step 2: Extract private key (remove prefix 0x80 and suffix 0x01 + checksum)
private_key_bytes = decoded_wif[1:-5]
private_key_hex = private_key_bytes.hex()

# Step 3 (Optional): Verify checksum
data_for_checksum = decoded_wif[:-4]
computed_checksum = hashlib.sha256(hashlib.sha256(data_for_checksum).digest()).digest()[:4]
is_valid = computed_checksum == decoded_wif[-4:]

# Results
print("Private Key (Hex):", private_key_hex)
print("Checksum Valid:", is_valid)

You need the fastest hashlib and Base58 implementation in the world, written in C/CUDA C, capable of achieving 35M WIFs/second or 100x higher.

Optimization Techniques:
AVX2/SHA-NI acceleration (if available) or GPU-accelerated SHA-256 for maximum throughput.

Precomputed lookup tables (LUTs) for Base58 encoding/decoding to minimize runtime calculations.

Warp-level shuffles to reduce global memory access and improve GPU efficiency.

Fused SHA-256 + Base58 kernel to eliminate intermediate memory transfers.

I’ve worked on this and developed a solution Grin