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wallet: implement GetChangeAddress()

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To select the default address to send tokens to.
This commit is contained in:
Roman Khimov 2020-02-14 19:17:07 +03:00
parent a4294f4b5f
commit 17d1b1a2ae
4 changed files with 42 additions and 0 deletions
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1
pkg/wallet/testdata/wallet1.json vendored Normal file
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@ -0,0 +1 @@
{"name":"wallet1","version":"1.0","scrypt":{"n":16384,"r":8,"p":8},"accounts":[{"address":"AKkkumHbBipZ46UMZJoFynJMXzSRnBvKcs","label":null,"isDefault":false,"lock":false,"key":"6PYLmjBYJ4wQTCEfqvnznGJwZeW9pfUcV5m5oreHxqryUgqKpTRAFt9L8Y","contract":{"script":"2102b3622bf4017bdfe317c58aed5f4c753f206b7db896046fa7d774bbc4bf7f8dc2ac","parameters":[{"name":"parameter0","type":"Signature"}],"deployed":false},"extra":null},{"address":"AZ81H31DMWzbSnFDLFkzh9vHwaDLayV7fU","label":null,"isDefault":false,"lock":false,"key":"6PYLmjBYJ4wQTCEfqvnznGJwZeW9pfUcV5m5oreHxqryUgqKpTRAFt9L8Y","contract":{"script":"532102103a7f7dd016558597f7960d27c516a4394fd968b9e65155eb4b013e4040406e2102a7bc55fe8684e0119768d104ba30795bdcc86619e864add26156723ed185cd622102b3622bf4017bdfe317c58aed5f4c753f206b7db896046fa7d774bbc4bf7f8dc22103d90c07df63e690ce77912e10ab51acc944b66860237b608c4f8f8309e71ee69954ae","parameters":[{"name":"parameter0","type":"Signature"},{"name":"parameter1","type":"Signature"},{"name":"parameter2","type":"Signature"}],"deployed":false},"extra":null}],"extra":null}

1
pkg/wallet/testdata/wallet2.json vendored Normal file
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@ -0,0 +1 @@
{"name":"wallet2","version":"1.0","scrypt":{"n":16384,"r":8,"p":8},"accounts":[{"address":"AKkkumHbBipZ46UMZJoFynJMXzSRnBvKcs","label":null,"isDefault":false,"lock":false,"key":"6PYLmjBYJ4wQTCEfqvnznGJwZeW9pfUcV5m5oreHxqryUgqKpTRAFt9L8Y","contract":{"script":"2102b3622bf4017bdfe317c58aed5f4c753f206b7db896046fa7d774bbc4bf7f8dc2ac","parameters":[{"name":"parameter0","type":"Signature"}],"deployed":false},"extra":null},{"address":"AZ81H31DMWzbSnFDLFkzh9vHwaDLayV7fU","label":null,"isDefault":false,"lock":false,"key":"6PYXHjPaNvW8YknSXaKsTWjf9FRxo1s4naV2jdmSQEgzaqKGX368rndN3L","contract":{"script":"532102103a7f7dd016558597f7960d27c516a4394fd968b9e65155eb4b013e4040406e2102a7bc55fe8684e0119768d104ba30795bdcc86619e864add26156723ed185cd622102b3622bf4017bdfe317c58aed5f4c753f206b7db896046fa7d774bbc4bf7f8dc22103d90c07df63e690ce77912e10ab51acc944b66860237b608c4f8f8309e71ee69954ae","parameters":[{"name":"parameter0","type":"Signature"},{"name":"parameter1","type":"Signature"},{"name":"parameter2","type":"Signature"}],"deployed":false},"extra":null},{"address":"AWLYWXB8C9Lt1nHdDZJnC5cpYJjgRDLk17","label":null,"isDefault":true,"lock":false,"key":"6PYXHjPaNvW8YknSXaKsTWjf9FRxo1s4naV2jdmSQEgzaqKGX368rndN3L","contract":{"script":"2102103a7f7dd016558597f7960d27c516a4394fd968b9e65155eb4b013e4040406eac","parameters":[{"name":"parameter0","type":"Signature"}],"deployed":false},"extra":null}],"extra":null}

22
pkg/wallet/wallet.go
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@ -7,6 +7,7 @@ import (
"github.com/CityOfZion/neo-go/pkg/crypto/keys"
"github.com/CityOfZion/neo-go/pkg/util"
"github.com/CityOfZion/neo-go/pkg/vm"
)
const (
@ -129,3 +130,24 @@ func (w *Wallet) GetAccount(h util.Uint160) *Account {
return nil
}
// GetChangeAddress returns the default address to send transaction's change to.
func (w *Wallet) GetChangeAddress() util.Uint160 {
var res util.Uint160
var acc *Account
for i := range w.Accounts {
if acc == nil || w.Accounts[i].Default {
if w.Accounts[i].Contract != nil && vm.IsSignatureContract(w.Accounts[i].Contract.Script) {
acc = w.Accounts[i]
if w.Accounts[i].Default {
break
}
}
}
}
if acc != nil {
res = acc.Contract.ScriptHash()
}
return res
}

18
pkg/wallet/wallet_test.go
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@ -6,6 +6,7 @@ import (
"os"
"testing"
"github.com/CityOfZion/neo-go/pkg/encoding/address"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
)
@ -145,3 +146,20 @@ func TestWallet_GetAccount(t *testing.T) {
assert.Equal(t, acc, wallet.GetAccount(h), "can't get %d account", i)
}
}
func TestWalletGetChangeAddress(t *testing.T) {
w1, err := NewWalletFromFile("testdata/wallet1.json")
require.NoError(t, err)
sh := w1.GetChangeAddress()
// No default address, the first one is used.
expected, err := address.StringToUint160("AKkkumHbBipZ46UMZJoFynJMXzSRnBvKcs")
require.NoError(t, err)
require.Equal(t, expected, sh)
w2, err := NewWalletFromFile("testdata/wallet2.json")
require.NoError(t, err)
sh = w2.GetChangeAddress()
// Default address.
expected, err = address.StringToUint160("AWLYWXB8C9Lt1nHdDZJnC5cpYJjgRDLk17")
require.NoError(t, err)
require.Equal(t, expected, sh)
}