Bitcoin private key to address online
MultiChain addresses and private keys are similar to those in bitcoin The format of addresses and private keys in MultiChain is similar to that of bitcoin addresses and private keys. The uncompressed version contains 65 bytes, consisting of 0x04 , 32 bytes for the X coordinate and 32 bytes for the Y coordinate. The compressed version contains 33 bytes, consisting of 0x02 Y is even or 0x03 Y is odd , followed by 32 bytes for the X coordinate.
Below is a compressed example: Add the first version byte from the address-pubkeyhash-version blockchain parameter to the start of the RIPEMD hash. For example with 00AFEA This is the address checksum: XOR this checksum with the address-checksum-value blockchain parameter. For example with ABC This is the byte for a 4-byte version binary address: This gives the commonly used address format: However, not all random numbers are created equally.
To ensure that our private key is difficult to guess, the Standards for Efficient Cryptography Group recommends that we pick a private key between the number 1 and a number slightly smaller than 1. An excerpt of the SECG guidelines. We can add this validation check fairly easily by adding the SECG-provided upper bound as an attribute to our PrivateKey module:. Before we pass our private key into our valid? Now we can call PrivateKey. Sign up for Pete's mailing list and have fresh content delivered to you, hot off the presses every week!
The most basic process for turning a Bitcoin private key into a sharable public address involves three basic steps. The first step is to transform our private key into a public key with the help of elliptic curve cryptography. The first element in this tuple is our Bitcoin public key. Once we have our public key in memory, our next step in transforming it into a public address is to hash it.
Next, we pipe our public key through two hashing functions: Flipping the arguments to: This gives us a thirty two byte binary. If we wanted, we could Base58Check encode this with a testnet version byte of 0xEF. As its name suggests, converting our private key into a WIF allows us to easily import it into most Bitcoin wallet software:.
Importing our test private key. After initiating the transaction with our faucet, we should see our Bitcoin arrive at our address on either a blockchain explorer , or within our wallet software. Our tBTC has arrived. Elixir, thanks to its Erlang heritage, ships with a wealth of tools that make this kind of hashing, signing, and byte mashing a walk in the park.
I encourage you to check our the PrivateKey module on Github to get a better feel for the simplicity of the code we wrote today.