feat: address hash function

Signed-off-by: Chris Gianelloni <[email protected]>

ledger/address.go

@@ -20,6 +20,8 @@ import (
 	"github.com/blinklabs-io/gouroboros/base58"
 	"github.com/blinklabs-io/gouroboros/bech32"
 	"github.com/blinklabs-io/gouroboros/cbor"
+
+	"golang.org/x/crypto/blake2b"
 )
 
 const (
@@ -43,6 +45,8 @@ const (
 	AddressTypeNoneScript    = 0b1111
 )
 
+type AddrKeyHash Blake2b224
+
 type Address struct {
 	addressType    uint8
 	networkId      uint8
@@ -191,6 +195,23 @@ func (a Address) PaymentAddress() *Address {
 	return newAddr
 }
 
+// PaymentKeyHash returns a new Blake2b224 hash of the payment key
+func (a *Address) PaymentKeyHash() Blake2b224 {
+	hash, err := blake2b.New(28, nil)
+	if err != nil {
+		panic(
+			fmt.Sprintf(
+				"unexpected error creating empty blake2b hash: %s",
+				err,
+			),
+		)
+	}
+	if a.paymentAddress != nil {
+		hash.Write(a.paymentAddress[:])
+	}
+	return Blake2b224(hash.Sum(nil))
+}
+
 // StakeAddress returns a new Address with only the stake key portion. This will return nil if the address is not a payment/staking key pair
 func (a Address) StakeAddress() *Address {
 	var addrType uint8
@@ -212,6 +233,23 @@ func (a Address) StakeAddress() *Address {
 	return newAddr
 }
 
+// StakeKeyHash returns a new Blake2b224 hash of the stake key
+func (a *Address) StakeKeyHash() Blake2b224 {
+	hash, err := blake2b.New(28, nil)
+	if err != nil {
+		panic(
+			fmt.Sprintf(
+				"unexpected error creating empty blake2b hash: %s",
+				err,
+			),
+		)
+	}
+	if a.stakingAddress != nil {
+		hash.Write(a.stakingAddress[:])
+	}
+	return Blake2b224(hash.Sum(nil))
+}
+
 func (a Address) generateHRP() string {
 	var ret string
 	if a.addressType == AddressTypeNoneKey ||

ledger/certs.go

@@ -221,7 +221,6 @@ func (c *StakeDelegationCertificate) Utxorpc() *utxorpc.Certificate {
 	}
 }
 
-type AddrKeyHash Blake2b224
 type PoolKeyHash Blake2b224
 type PoolMetadataHash Blake2b256
 type VrfKeyHash Blake2b256