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Ethereum: How do you get the OP_HASH160 value from a bitcoin address?
Understand the value of Ethereum OP_HASH160 and Bitcoin title
As you try to sign a Coinbase Transaction with the Given Hash, you will probably experience an unknown error. The purpose of the article is to clarify how to get op_hash160" from a bitcoin.
to Understand hash functions
Before you get into this topic, it is essential to understand the hash functions in cryptocurrency transactions. Hash-function is a one-way process that converts any size into a fixed length of a fixed length known as hash. In Ethereum,op_hash160is part of a larger transaction signature.
The most commonly used hash function on the Ethereum blockchain is the KecCAK-256 hash function. IT WORKS LIKE THIS:
- KecCAK-256 Hash Function : This algorithm takes data input (in this case a bitcoin address) and generates 20 byte hexadecimal string as an output.
- to authenticate the message (K-HMAC) Keychain-hash: theOp_Hash160
Value is the result of applicationing the KecCAK-256 application to the Bitcoin address in a specification order.
createop_hash160from Bitcoin Address
To create “op_hash160”, you must follow these steps:
1
Get Bitcoin Title
: Find the Ethereum Wallet Bitcoin Address.
- Form Bitcoin title : Convert Bitcoin title totered in the format required by Keccak-256 Hash:
* The byte (32 bit) depicts "0x01",0x02, ..., 0x5e.
- Apply the KECCAK-256 Hash Function : use a directory or execute the KECCAK-256 algorithm on the platform to produce a 20-byte hexadecimal string.
HERE'S AN EXAMPLE USING JAVASCRIPT AND WEB3 LIBRARY (For Ethereum Wallets):
Javascript
Const Web3 = Needed ('Web3');
// Get Bitcoin Address
Const bitcoinaddress = '1A1A1 ...'; // Replace with the actual address
// Create a New Web3 Instance
Const Service Provider = New Web3.Providers.httprovider ('
// convert Bitcoin title to bytes
Let bitcoinbytes = buffer.from (bitcoinaddress, 'hex');
// Apply the Keccak-256 Hash Function
Const ophash160 = Keccakk256 (0x01 ... Bitcoinbytes);
console.log (ophash160.tosstring ('hex')); // Output: 0x1234567890123456789
Coinbase Transaction Signature
To create a coinbase transaction signature, you must use op_hash160 and use other parameters. The Correct Format:
`JSon
{{{
"Transaction": {
// Other transaction data ...
"Nonce": number,
"GasSrice": number,
"Blocknumber": number
},
"Signature": {
"Type": "hash-160",
"Value": Ophash160
}
}
Don’t forget to replace “Your_project_id” with the Infura Project ID.