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tx.go
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tx.go
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package wallet
import (
"bytes"
"github.com/oasisprotocol/curve25519-voi/primitives/ed25519"
"github.com/spacemeshos/go-scale"
"github.com/spacemeshos/go-spacemesh/common/types"
"github.com/spacemeshos/go-spacemesh/genvm/core"
"github.com/spacemeshos/go-spacemesh/genvm/sdk"
"github.com/spacemeshos/go-spacemesh/genvm/templates/wallet"
"github.com/spacemeshos/go-spacemesh/signing"
)
func encode(fields ...scale.Encodable) []byte {
buf := bytes.NewBuffer(nil)
encoder := scale.NewEncoder(buf)
for _, field := range fields {
_, err := field.EncodeScale(encoder)
if err != nil {
panic(err)
}
}
return buf.Bytes()
}
// SelfSpawn creates a self-spawn transaction.
func SelfSpawn(pk signing.PrivateKey, nonce core.Nonce, opts ...sdk.Opt) []byte {
args := wallet.SpawnArguments{}
copy(args.PublicKey[:], signing.Public(pk))
return Spawn(pk, wallet.TemplateAddress, &args, nonce, opts...)
}
// Spawn creates a spawn transaction.
func Spawn(pk signing.PrivateKey, template core.Address, args scale.Encodable, nonce core.Nonce, opts ...sdk.Opt) []byte {
options := sdk.Defaults()
for _, opt := range opts {
opt(options)
}
payload := core.Payload{}
payload.Nonce = nonce
payload.GasPrice = options.GasPrice
public := &core.PublicKey{}
copy(public[:], signing.Public(pk))
// note that principal is computed from pk
principal := core.ComputePrincipal(wallet.TemplateAddress, public)
tx := encode(&sdk.TxVersion, &principal, &sdk.MethodSpawn, &template, &payload, args)
sig := ed25519.Sign(ed25519.PrivateKey(pk), core.SigningBody(options.GenesisID[:], tx))
return append(tx, sig...)
}
// Spend creates spend transaction.
func Spend(pk signing.PrivateKey, to types.Address, amount uint64, nonce types.Nonce, opts ...sdk.Opt) []byte {
options := sdk.Defaults()
for _, opt := range opts {
opt(options)
}
spawnargs := wallet.SpawnArguments{}
copy(spawnargs.PublicKey[:], signing.Public(pk))
principal := core.ComputePrincipal(wallet.TemplateAddress, &spawnargs)
payload := core.Payload{}
payload.GasPrice = options.GasPrice
payload.Nonce = nonce
args := wallet.SpendArguments{}
args.Destination = to
args.Amount = amount
tx := encode(&sdk.TxVersion, &principal, &sdk.MethodSpend, &payload, &args)
sig := ed25519.Sign(ed25519.PrivateKey(pk), core.SigningBody(options.GenesisID[:], tx))
return append(tx, sig...)
}