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Understand Op_Checksig: Ethereum private key signature force
As a beginner who learns on bitcoin, scripts and public cryptography of Keystrok (P2PKH), it is important to cover the term “op_checksig”. In this article, we will enter the private key signature of the world on Ethereum Blockchain.
What is OP_CHECKSIG?
Op_checksig 'is a special Opcode in the Ethereum virtual machine (EVM), which allows developers to sign to treat their private keys. It is used to test the authenticity and integrity of the transaction, ensuring that the sender has control of the transferred funds.
How do OP_Checksig work?
When the user signs the transaction using his own private key, he crypt with the sum of control, which is then discharged via the OpcodeOp_checksig ‘. The EVM checks the signature against the known public key stored in the blockchain, ensuring that the sender has control of the means.
Here is a step-being divided as an `op_checksig:
1
Development of the transaction : When the user wishes to send funds to another node on the network, he creates an agreement using his own private key.
- Encryption : Then the transaction is encrypted with the sum of control (for example ECDSA-256). This ensures that the sender cannot ruin or modify the content of the transaction.
3
Signature creation
: EVM generates a transaction signature, which is a unique identifier which portrays the private key to the sender. This signature includes:
* The public address of the sender (also known as the "No" address
* Haping of the HIFTER data sender
- OP_CHECKSIG OPCODE : OP_CHECKSIG OPCODE is applied to the signed transaction which checks its integrity and its authenticity.
- Check the public key : EVM checks the signature against a public key stored in the blockchain (for example the address “0x …”). This guarantees that:
* The sender has control of the transferred means
* The signature is valid for a given transaction
Code example
`Solidity
Pragma Solidity ^ 0.8,0;
Signing of the agreement
SigntransAction function (address of, amount uint) public {
// generate a private key using Keccak256
byte32 privatekey = Keccak256 (the two. Encodepacked (NO));
// Cry the transaction data with the private key
Bytes Memory Transactions = Both. Encodepacked (amount);
// Sign the agreement with PrivateKey
Baits32 signature = keccak256 (the two. enCODEPACKED (PrivateKey, Transactantata));
// Apply Op_Checksig to the signed transaction
assembly {
// Check that the sender has control of the transferred resources
Let Public_key: = 0x ...; // replaced with a valid public key
Let GIS = Keccak256 (the two. Encodepacked (public_key, signature))
// Check the signature online with public keys and expected transaction data
If (Sig == Public_Key) {
Return the truth;
} other {
Returns False;
}
}
}
}
'
In this example, we use a "signatory" agreement to sign the transaction with their private key. The "SigntransAction" function generates a private key using Keccak256, figures the transaction data, to sign it with a private key and to applyOP_CHECKSIG” to test its integrity.
Conclusion
In summary, OP_Checksig is an essential Ethereum Opcode in a virtual machine that allows developers to sign their private keys. By checking the signature against a public key stored in the blockchain, EVM ensures that the sender has control of the transferred funds. This basic concept plays a crucial role in the treatment of secure and reliable transactions on the Ethereum network.