## Conversion from ecdsa public key to bitcoin address

prove you can send Bitcoin that has been sent to you. So, to turn this script into an address, you simply apply base58check to the ripemd160 of the SHA256 of the script OP_0 0x14 PubKey Hash except you prepend 0x05 to the script hash instead of 0x00 to denote the address type is a P2SH address. Scripts give you more functionality, which is one reason why they are more popular. It has generally stopped being used in favor of the shorter compressed format. How do you generate a public key? Encoding Now that we have hashed the public key, we now perform base58check encoding.

I don't think OpenSSL support that). We only need to store whether the y coordinate is even or odd. You do elliptic curve multiplication using your private key, which will give you a final resting point on the elliptic curve. Note: To do the contained opensslcli commands, I installed libressl in order for some of the elliptic curve commands to work as the current version of openssl cli on mac has a bug. The checksum is calculated as checksum SHA256(SHA256(prefixdata) and only the first 4 bytes of the hash are appended to the end of the data. Base58check allows the hash to be displayed in a more compact way (using more letters of the alphabet) while avoiding characters that could be confused with each other such as 0 and O where a typo could result in your losing your funds. This shortens the number of output bytes and ensures forex market participants role that in case there is some unforeseen relationship between elliptic curve and sha256, another unrelated hash function would significantly increase the difficulty of reversing the operation: echo xxd -r -p openssl sha256 (stdin) 8eb001a echo 8eb001a. Digital Signatures: A user can, with their private key and a hash of some data, use a digital signature algorithm such as ecdsa, to calculate a digital signature. Since the equation solves for y, the right side of the equation could be either positive or negative. P2PK however, in Bitcoin we now more commonly hash160 our public key before giving it away. You need to find a way to convert it from Base 256 to Base.

### Private key - Bitcoin Wiki