neoneo-go/cli/paramcontext/context.go

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package paramcontext
import (
"encoding/json"
"fmt"
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"os"
"github.com/nspcc-dev/neo-go/pkg/config/netmode"
"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"
)
// InitAndSave creates an incompletely signed transaction which can be used
// as an input to `multisig sign`. If a wallet.Account is given and can sign,
// it's signed as well using it.
func InitAndSave(net netmode.Magic, tx *transaction.Transaction, acc *wallet.Account, filename string) error {
scCtx := context.NewParameterContext("Neo.Network.P2P.Payloads.Transaction", net, tx)
if acc != nil && acc.CanSign() {
priv := acc.PrivateKey()
pub := priv.PublicKey()
sign := priv.SignHashable(uint32(net), 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 the parameter context from the file.
func Read(filename string) (*context.ParameterContext, error) {
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data, err := os.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 the parameter context to the 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)
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} else if err := os.WriteFile(filename, data, 0644); err != nil {
return fmt.Errorf("can't write transaction to file: %w", err)
}
return nil
}