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Results tagged with signature
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user 6106
6
votes
Accepted
How do I extract the v, r, s values from a signed transaction?
This part of the signed transaction contains the v, r, and s fields:
25a028ef61340bd939bc2195fe537567866003e1a15d3c71ff63e1590620aa636276a067cbe9d8997f761aecb703304b3800ccf555c9f3dc64214b297fb1966a3b …
- 4,230
1
vote
Why does ecrecover() take signature parameters (v,r,s) instead of the full signature?
You should note that what we call a signature is actually 256 bits and is the combination of the r and s field. … The v field only contains one bit of information about the signature and makes it possible to derive the public associated with the signature -- such that you don't need to include that in the signed transaction …
- 4,230
6
votes
Accepted
Understanding Ethereum signatures
An Ethereum signature contains three values: v, R, S. A Bitcoin signature contains only two numbers: R and S. … It is possible to convert an RLP signature to a DER encoded signature but not the other way around since the DER signature does not contain the v value. …
- 4,230
4
votes
Accepted
Transaction Signing & Hashing
Once the signature is calculated, the r, s values from the signature, along with the recovery bit, are inserted into the final transaction hex, thus creating the signed transaction. … Prior to EIP155, the signature was:
ECDSA_secp256k1(private_key, Keccak256(RLP(nonce, gasPrice, gasLimit, To, Value, Data)))
With EIP155, the signature is:
ECDSA_secp256k1(private_key, Keccak256(RLP(nonce …
- 4,230
1
vote
How to sign a message using secp256k1 in Ruby?
A bitcoin signature consists of two parts: (r,s).
An Ethereum signature consists of three parts: (v,r,s). … The extra value v which is only one byte allows for the derivation of the public key from the signature. …
- 4,230
1
vote
Accepted
No luck recovering public key after EIP 155
Try replacing the 2nd to last line with:
var publicKey = ethutil.ecrecover(msgHash, (v & 1 ^ 1) + 27, r, s);
Most of your code looks correct to me but the parity of the 2nd argument to ecrecover mu …
- 4,230