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[#486] morph/client: Add option to setup custom alphabet source in notary

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To enable notary support in main chain, notary subsystem should not get
alphabet keys from (main chain) committee. This key fetcher is now
separated and may be overwritten by `WithAlphabetSource` option.

Signed-off-by: Alex Vanin <alexey@nspcc.ru>
This commit is contained in:
Alex Vanin 2021-04-20 18:11:35 +03:00 committed by Alex Vanin
parent c84fe1360e
commit dd1ace12f7
1 changed files with 31 additions and 14 deletions
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29
pkg/morph/client/notary.go
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@ -23,14 +23,19 @@ type (
roundTime uint32 // extra amount of blocks to synchronize sidechain height diff of inner ring nodes
fallbackTime uint32 // amount of blocks before fallbackTx will be sent
alphabetSource AlphabetKeys // source of alphabet node keys to prepare witness
notary util.Uint160
proxy util.Uint160
}
notaryCfg struct {
txValidTime, roundTime, fallbackTime uint32
alphabetSource AlphabetKeys
}
AlphabetKeys func() (keys.PublicKeys, error)
NotaryOption func(*notaryCfg)
)
@ -48,19 +53,20 @@ const (
var errUnexpectedItems = errors.New("invalid number of NEO VM arguments on stack")
func defaultNotaryConfig() *notaryCfg {
func defaultNotaryConfig(c *Client) *notaryCfg {
return &notaryCfg{
txValidTime: defaultNotaryValidTime,
roundTime: defaultNotaryRoundTime,
fallbackTime: defaultNotaryFallbackTime,
alphabetSource: c.Committee,
}
}
// EnableNotarySupport creates notary structure in client that provides
// ability for client to get inner ring list from netmap contract and
// use proxy contract script hash to create tx for notary contract.
func (c *Client) EnableNotarySupport(proxy, netmap util.Uint160, opts ...NotaryOption) error {
cfg := defaultNotaryConfig()
// ability for client to get alphabet keys from committee or provided source
// and use proxy contract script hash to create tx for notary contract.
func (c *Client) EnableNotarySupport(proxy util.Uint160, opts ...NotaryOption) error {
cfg := defaultNotaryConfig(c)
for _, opt := range opts {
opt(cfg)
@ -77,6 +83,7 @@ func (c *Client) EnableNotarySupport(proxy, netmap util.Uint160, opts ...NotaryO
txValidTime: cfg.txValidTime,
roundTime: cfg.roundTime,
fallbackTime: cfg.fallbackTime,
alphabetSource: cfg.alphabetSource,
}
return nil
@ -203,7 +210,7 @@ func (c *Client) notaryInvokeAsCommittee(contract util.Uint160, method string, a
}
func (c *Client) notaryInvoke(committee bool, contract util.Uint160, method string, args ...interface{}) error {
alphabetList, err := c.Committee() // prepare arguments for test invocation
alphabetList, err := c.notary.alphabetSource() // prepare arguments for test invocation
if err != nil {
return err
}
@ -472,6 +479,16 @@ func WithFallbackTime(t uint32) NotaryOption {
}
}
// WithAlphabetSource returns a notary support option for client
// that specifies function to return list of alphabet node keys.
// By default notary subsystem uses committee as a source. This is
// valid for side chain but notary in main chain should override it.
func WithAlphabetSource(t AlphabetKeys) NotaryOption {
return func(c *notaryCfg) {
c.alphabetSource = t
}
}
const alreadyOnChainErrorMessage = "already on chain"
// Neo RPC node can return `core.ErrInvalidAttribute` error with