72 lines
2 KiB
Go
72 lines
2 KiB
Go
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package contract
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import (
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"crypto/elliptic"
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"errors"
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"math"
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"github.com/nspcc-dev/neo-go/pkg/config"
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"github.com/nspcc-dev/neo-go/pkg/core/fee"
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"github.com/nspcc-dev/neo-go/pkg/core/interop"
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"github.com/nspcc-dev/neo-go/pkg/crypto/hash"
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"github.com/nspcc-dev/neo-go/pkg/crypto/keys"
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"github.com/nspcc-dev/neo-go/pkg/smartcontract"
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"github.com/nspcc-dev/neo-go/pkg/vm/stackitem"
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)
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// CreateMultisigAccount calculates multisig contract scripthash for a
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// given m and a set of public keys.
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func CreateMultisigAccount(ic *interop.Context) error {
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m := ic.VM.Estack().Pop().BigInt()
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mu64 := m.Uint64()
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if !m.IsUint64() || mu64 > math.MaxInt32 {
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return errors.New("m must be positive and fit int32")
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}
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arr := ic.VM.Estack().Pop().Array()
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pubs := make(keys.PublicKeys, len(arr))
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for i, pk := range arr {
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p, err := keys.NewPublicKeyFromBytes(pk.Value().([]byte), elliptic.P256())
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if err != nil {
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return err
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}
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pubs[i] = p
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}
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var invokeFee int64
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if ic.IsHardforkEnabled(config.HFAspidochelone) {
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invokeFee = fee.ECDSAVerifyPrice * int64(len(pubs))
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} else {
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invokeFee = 1 << 8
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}
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invokeFee *= ic.BaseExecFee()
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if !ic.VM.AddGas(invokeFee) {
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return errors.New("gas limit exceeded")
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}
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script, err := smartcontract.CreateMultiSigRedeemScript(int(mu64), pubs)
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if err != nil {
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return err
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}
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ic.VM.Estack().PushItem(stackitem.NewByteArray(hash.Hash160(script).BytesBE()))
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return nil
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}
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// CreateStandardAccount calculates contract scripthash for a given public key.
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func CreateStandardAccount(ic *interop.Context) error {
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h := ic.VM.Estack().Pop().Bytes()
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p, err := keys.NewPublicKeyFromBytes(h, elliptic.P256())
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if err != nil {
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return err
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}
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var invokeFee int64
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if ic.IsHardforkEnabled(config.HFAspidochelone) {
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invokeFee = fee.ECDSAVerifyPrice
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} else {
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invokeFee = 1 << 8
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}
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invokeFee *= ic.BaseExecFee()
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if !ic.VM.AddGas(invokeFee) {
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return errors.New("gas limit exceeded")
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}
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ic.VM.Estack().PushItem(stackitem.NewByteArray(p.GetScriptHash().BytesBE()))
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return nil
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}
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