ETHERREUM: How are Alhchchch Flass Encoddress signature?
In Ethereum, signatures can prove ownership and authorship of transactions to blockchain. One of the key components is that this is the symptoms
system CIGHASH (Algorithm Chintare Hash). In this art we dive as Sighash flags of entrepreneurs with Syignaturature.
what sighhh flalas?
Sighash flags allow the seat to control which part of the Y Watt transaction sign and verify. Flags allow the efficient use of memory and procedures in the Ethereum network. A
Signature s created by hiding a public key that Folled Sheshom sshing of a private key.
Set signs of symptoms of sygnitude
What a Watts Signator to deal with the specified parts of the transaction to be signed, y nee tocondem gighash flame at least indefinite universality. This body extracted the required field from the top of the tour of the tour of the Twith T T T with the private key.
We should assume that we are working with a simple transaction test:
charity
We have a solid performance ^0.8.8.0;
Member of Simpletransaction {
public funding, public {
// input: Sending, recipient and AMB for transmission
BAJTS32 _inputs = abi.encodepackedpacked (sender, recipients, anomunt);
//// Encode sighash flas (Poccig)
Sigh [] memory _flags = new sigh [_inputs.lengh];
for (uut = 0;
_flags [i] = sighash (_ins [i]);
}
// hash hash with a private key
bajtes32 _ndatahish = abi.encodepacked (_inputs, mm.sender);
// hash the results of the public key (oopckig)
BAJTS32 _sighhish = keccel keccel256 (abi.encodepacked (_datahas, _flags));
// sign a signature with a private key
BAJTS32 _shi;
IIF (mg.sender = = address (0) {
mounting {
_SIG: = SHA3_256 (ME: Edocated.encodepacked (_Sighhish))
}
} Else {
_Sig: keccak256 (abi.encodepacedpacked (_sighhish));
}
// Verify Signature
demand (mg.sender = = bener, “invalid signature”);
}
}
`P
During the test we encode Sighhash Flasssto we do not question the indefinite function AB.encodepacked ‘. We avoid banging the storm to create a gray value.
* sighash flew on onkoding
Field “_flags” field of contasis for delay that I
iGhsh * structure for information subchones to:
- 0x1 (OP_HECCIG): Extracts non -sticking arched storage of ratings.
- Other symptoms (eg op_ccigverify, op_heccign): Options of verification of provision adification.
By coding symptoms on one indefinite variable “_sighash”, weeds verify the verification of the Waast transaction and the verified transaction.
* Conclusion
In this art, we exploded how Sighash flags coded in Ethereum. By signing how it works, you will be equipped with a beer to optimize your basic network performance. Remember to give Ballo Ballo practicing features Wittgephy and SHESH.
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