func (bc *Blockchain) ValidRegisterTxn(t Txn) bool {
if !t.ValidNumInputs(2) || !t.ValidNumOutputs() {
return false
}
domain := t.Inputs[0].PrevHash.String()
subdomain := t.Inputs[1].PrevHash.String()
identity, err := NewIdentity(domain, subdomain)
if err != nil {
log.Println(err)
return false
}
// Check that Identity is not registered
// Check that Identity-PKs is not in accumulator
return t.Type == Register &&
t.Outputs[0].Value >= REGISTRATION_FEE &&
crypto.Verify(identity.FullName(), t.Inputs[0].Signature, t.Inputs[0].PublicKey) &&
crypto.Verify(identity.FullName(), t.Inputs[1].Signature, t.Inputs[1].PublicKey)
}
func (bc *Blockchain) ValidUpdateTxn(t Txn) bool {
if !t.ValidNumInputs(2) || !t.ValidNumOutputs() {
return false
}
domain := t.Inputs[0].PrevHash.String()
subdomain := t.Inputs[1].PrevHash.String()
identity, err := NewIdentity(domain, subdomain)
if err != nil {
return false
}
// offlinePK := lookup from database
return t.Type == Update &&
t.Outputs[0].Value >= UPDATE_FEE &&
crypto.Verify(identity.FullName(), t.Inputs[0].Signature, t.Inputs[0].PublicKey)
//crypto.Verify(identity.FullName(), t.OfflineSignature, offlinePK)
}
func (bc *Blockchain) ValidRevokeTxn(t Txn) bool {
if !t.ValidNumInputs(2) || !t.ValidNumOutputs() {
return false
}
fmt.Println("Txn: %v", t)
domain := t.Inputs[0].PrevHash.String()
subdomain := t.Inputs[1].PrevHash.String()
identity, err := NewIdentity(domain, subdomain)
if err != nil {
return false
}
// offlinePK := lookup from database
return t.Type == Revoke &&
t.Outputs[0].Value >= REVOKE_FEE &&
crypto.Verify(identity.FullName(), t.Inputs[0].Signature, t.Inputs[0].PublicKey)
}
func NewRevokeTxn(onlineSecret, offlineSecret crypto.CertcoinSecretKey,
source crypto.CertcoinPublicKey,
identity Identity) Txn {
sig := crypto.Sign(identity.FullName(), onlineSecret)
log.Println("Signature:", sig)
verifies := crypto.Verify(identity.FullName(), sig, onlineSecret.PublicKey)
log.Println("PublicKey:", onlineSecret.PublicKey)
log.Println("Signature:", sig)
log.Println("Verifies:", verifies)
return Txn{
Type: Revoke,
Inputs: []Input{
Input{
PrevHash: identity.Domain,
PublicKey: onlineSecret.PublicKey,
Signature: sig,
},
Input{
PrevHash: identity.Subdomain,
PublicKey: offlineSecret.PublicKey,
Signature: sig,
},
Input{
PrevHash: crypto.SHA256Sum{},
PublicKey: source,
Signature: sig,
},
},
Outputs: []Output{
Output{
Address: crypto.SHA256Sum{},
Value: REVOKE_FEE,
},
},
}
}