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crypto: Created SignatureLength constant

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This commit is contained in:
Javier Peletier 2018-12-20 09:04:30 +01:00
parent fe86a707d8
commit 00e2b10105
1 changed files with 9 additions and 0 deletions
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9
crypto/crypto.go
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@ -34,6 +34,15 @@ import (
"github.com/ethereum/go-ethereum/rlp" "github.com/ethereum/go-ethereum/rlp"
) )
//SignatureLength indicates the byte length required to carry a signature with recovery id.
const SignatureLength = 64 + 1 // 64 bytes ECDSA signature + 1 byte recovery id
// RecoveryIDOffset points to the byte offset within the signature that contains the recovery id.
const RecoveryIDOffset = 64
// DigestLength sets the signature digest exact length
const DigestLength = 32
var ( var (
secp256k1N, _ = new(big.Int).SetString("fffffffffffffffffffffffffffffffebaaedce6af48a03bbfd25e8cd0364141", 16) secp256k1N, _ = new(big.Int).SetString("fffffffffffffffffffffffffffffffebaaedce6af48a03bbfd25e8cd0364141", 16)
secp256k1halfN = new(big.Int).Div(secp256k1N, big.NewInt(2)) secp256k1halfN = new(big.Int).Div(secp256k1N, big.NewInt(2))