forked from TrueCloudLab/neoneo-go
58 lines
1.8 KiB
Go
58 lines
1.8 KiB
Go
package paramcontext
|
|
|
|
import (
|
|
"encoding/json"
|
|
"fmt"
|
|
"io/ioutil"
|
|
|
|
"github.com/nspcc-dev/neo-go/pkg/core/transaction"
|
|
"github.com/nspcc-dev/neo-go/pkg/encoding/address"
|
|
"github.com/nspcc-dev/neo-go/pkg/smartcontract/context"
|
|
"github.com/nspcc-dev/neo-go/pkg/wallet"
|
|
)
|
|
|
|
// validUntilBlockIncrement is the number of extra blocks to add to an exported transaction
|
|
const validUntilBlockIncrement = 50
|
|
|
|
// InitAndSave creates incompletely signed transaction which can used
|
|
// as input to `multisig sign`.
|
|
func InitAndSave(tx *transaction.Transaction, acc *wallet.Account, filename string) error {
|
|
// avoid fast transaction expiration
|
|
tx.ValidUntilBlock += validUntilBlockIncrement
|
|
priv := acc.PrivateKey()
|
|
pub := priv.PublicKey()
|
|
sign := priv.Sign(tx.GetSignedPart())
|
|
scCtx := context.NewParameterContext("Neo.Core.ContractTransaction", tx)
|
|
h, err := address.StringToUint160(acc.Address)
|
|
if err != nil {
|
|
return fmt.Errorf("invalid address: %s", acc.Address)
|
|
}
|
|
if err := scCtx.AddSignature(h, acc.Contract, pub, sign); err != nil {
|
|
return fmt.Errorf("can't add signature: %w", err)
|
|
}
|
|
return Save(scCtx, filename)
|
|
}
|
|
|
|
// Read reads parameter context from file.
|
|
func Read(filename string) (*context.ParameterContext, error) {
|
|
data, err := ioutil.ReadFile(filename)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("can't read input file: %w", err)
|
|
}
|
|
|
|
c := new(context.ParameterContext)
|
|
if err := json.Unmarshal(data, c); err != nil {
|
|
return nil, fmt.Errorf("can't parse transaction: %w", err)
|
|
}
|
|
return c, nil
|
|
}
|
|
|
|
// Save writes parameter context to file.
|
|
func Save(c *context.ParameterContext, filename string) error {
|
|
if data, err := json.Marshal(c); err != nil {
|
|
return fmt.Errorf("can't marshal transaction: %w", err)
|
|
} else if err := ioutil.WriteFile(filename, data, 0644); err != nil {
|
|
return fmt.Errorf("can't write transaction to file: %w", err)
|
|
}
|
|
return nil
|
|
}
|