[#770] morph/client: Support non-alpha notary request

Add `NotaryInvokeNotAlpha` to low-level
client. It creates and sends notary request
that must be signed by Alphabet nodes, but
does not sign it by current node's private
key.

Signed-off-by: Pavel Karpy <carpawell@nspcc.ru>
This commit is contained in:
Pavel Karpy 2021-08-25 14:02:16 +03:00 committed by Pavel Karpy
parent b46adf188c
commit 94d431e56e

View file

@ -11,6 +11,7 @@ import (
"github.com/nspcc-dev/neo-go/pkg/crypto/hash"
"github.com/nspcc-dev/neo-go/pkg/crypto/keys"
"github.com/nspcc-dev/neo-go/pkg/encoding/fixedn"
"github.com/nspcc-dev/neo-go/pkg/smartcontract"
sc "github.com/nspcc-dev/neo-go/pkg/smartcontract"
"github.com/nspcc-dev/neo-go/pkg/util"
"github.com/nspcc-dev/neo-go/pkg/vm/opcode"
@ -273,7 +274,26 @@ func (c *Client) NotaryInvoke(contract util.Uint160, fee fixedn.Fixed8, method s
return c.Invoke(contract, fee, method, args...)
}
return c.notaryInvoke(false, contract, method, args...)
return c.notaryInvoke(false, true, contract, method, args...)
}
// NotaryInvokeNotAlpha does the same as NotaryInvoke but does not use client's
// private key in Invocation script. It means that main TX of notary request is
// not expected to be signed by the current node.
//
// Considered to be used by non-IR nodes.
func (c *Client) NotaryInvokeNotAlpha(contract util.Uint160, fee fixedn.Fixed8, method string, args ...interface{}) error {
if c.multiClient != nil {
return c.multiClient.iterateClients(func(c *Client) error {
return c.NotaryInvokeNotAlpha(contract, fee, method, args...)
})
}
if c.notary == nil {
return c.Invoke(contract, fee, method, args...)
}
return c.notaryInvoke(false, false, contract, method, args...)
}
func (c *Client) notaryInvokeAsCommittee(method string, args ...interface{}) error {
@ -282,10 +302,10 @@ func (c *Client) notaryInvokeAsCommittee(method string, args ...interface{}) err
return err
}
return c.notaryInvoke(true, designate, method, args...)
return c.notaryInvoke(true, true, designate, method, args...)
}
func (c *Client) notaryInvoke(committee bool, contract util.Uint160, method string, args ...interface{}) error {
func (c *Client) notaryInvoke(committee, invokedByAlpha bool, contract util.Uint160, method string, args ...interface{}) error {
alphabetList, err := c.notary.alphabetSource() // prepare arguments for test invocation
if err != nil {
return err
@ -322,7 +342,7 @@ func (c *Client) notaryInvoke(committee bool, contract util.Uint160, method stri
// after test invocation we build main multisig transaction
multiaddrAccount, err := c.notaryMultisigAccount(alphabetList, committee)
multiaddrAccount, err := c.notaryMultisigAccount(alphabetList, committee, invokedByAlpha)
if err != nil {
return err
}
@ -364,7 +384,7 @@ func (c *Client) notaryInvoke(committee bool, contract util.Uint160, method stri
}
// define witnesses
mainTx.Scripts = c.notaryWitnesses(multiaddrAccount, mainTx)
mainTx.Scripts = c.notaryWitnesses(invokedByAlpha, multiaddrAccount, mainTx)
resp, err := c.client.SignAndPushP2PNotaryRequest(mainTx,
[]byte{byte(opcode.RET)},
@ -444,7 +464,7 @@ func (c *Client) notaryAccounts(multiaddr *wallet.Account) []*wallet.Account {
return a
}
func (c *Client) notaryWitnesses(multiaddr *wallet.Account, tx *transaction.Transaction) []transaction.Witness {
func (c *Client) notaryWitnesses(invokedByAlpha bool, multiaddr *wallet.Account, tx *transaction.Transaction) []transaction.Witness {
if multiaddr == nil || tx == nil {
return nil
}
@ -459,11 +479,30 @@ func (c *Client) notaryWitnesses(multiaddr *wallet.Account, tx *transaction.Tran
})
// then we have inner ring multiaddress witness
w = append(w, transaction.Witness{
InvocationScript: append(
// invocation script should be of the form:
// { PUSHDATA1, 64, signatureBytes... }
// to pass Notary module verification
var invokeScript []byte
if invokedByAlpha {
invokeScript = append(
[]byte{byte(opcode.PUSHDATA1), 64},
multiaddr.PrivateKey().SignHashable(uint32(c.client.GetNetwork()), tx)...,
),
)
} else {
// we can't provide alphabet node signature
// because Storage Node doesn't own alphabet's
// private key. Thus, add dummy witness with
// empty bytes instead of signature
invokeScript = append(
[]byte{byte(opcode.PUSHDATA1), 64},
make([]byte, 64)...,
)
}
w = append(w, transaction.Witness{
InvocationScript: invokeScript,
VerificationScript: multiaddr.GetVerificationScript(),
})
@ -479,17 +518,35 @@ func (c *Client) notaryWitnesses(multiaddr *wallet.Account, tx *transaction.Tran
return w
}
func (c *Client) notaryMultisigAccount(ir []*keys.PublicKey, committee bool) (*wallet.Account, error) {
func (c *Client) notaryMultisigAccount(ir []*keys.PublicKey, committee, invokedByAlpha bool) (*wallet.Account, error) {
m, _ := mn(ir, committee)
multisigAccount := wallet.NewAccountFromPrivateKey(c.acc.PrivateKey())
var multisigAccount *wallet.Account
if invokedByAlpha {
multisigAccount = wallet.NewAccountFromPrivateKey(c.acc.PrivateKey())
err := multisigAccount.ConvertMultisig(m, ir)
if err != nil {
// wrap error as NeoFS-specific since the call is not related to any client
return nil, wrapNeoFSError(fmt.Errorf("can't convert account to inner ring multisig wallet: %w", err))
}
} else {
script, err := smartcontract.CreateMultiSigRedeemScript(m, ir)
if err != nil {
// wrap error as NeoFS-specific since the call is not related to any client
return nil, wrapNeoFSError(fmt.Errorf("can't make inner ring multisig wallet: %w", err))
}
// alphabet multisig redeem script is
// used as verification script for
// inner ring multiaddress witness
multisigAccount = &wallet.Account{
Contract: &wallet.Contract{
Script: script,
},
}
}
return multisigAccount, nil
}