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execute.go
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execute.go
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package name
import (
"bytes"
"encoding/json"
"errors"
"fmt"
"github.com/aergoio/aergo/contract/system"
"github.com/aergoio/aergo/state"
"github.com/aergoio/aergo/types"
)
func ExecuteNameTx(bs *state.BlockState, scs *state.ContractState, txBody *types.TxBody,
sender, receiver *state.V, blockNo types.BlockNo) ([]*types.Event, error) {
systemContractState, err := bs.StateDB.OpenContractStateAccount(types.ToAccountID([]byte(types.AergoSystem)))
ci, err := ValidateNameTx(txBody, sender, scs, systemContractState)
if err != nil {
return nil, err
}
var events []*types.Event
var nameState *state.V
owner := getOwner(scs, []byte(types.AergoName), false)
if owner != nil {
if bytes.Equal(sender.ID(), owner) {
nameState = sender
} else {
nameState, err = bs.GetAccountStateV(owner)
if err != nil {
return nil, err
}
}
} else {
nameState = receiver
}
switch ci.Name {
case types.NameCreate:
if err = CreateName(scs, txBody, sender, nameState,
ci.Args[0].(string)); err != nil {
return nil, err
}
events = append(events, &types.Event{
ContractAddress: receiver.ID(),
EventIdx: 0,
EventName: "create name",
JsonArgs: `{"name":"` + ci.Args[0].(string) + `"}`,
})
case types.NameUpdate:
if err = UpdateName(bs, scs, txBody, sender, nameState,
ci.Args[0].(string), ci.Args[1].(string)); err != nil {
return nil, err
}
events = append(events, &types.Event{
ContractAddress: receiver.ID(),
EventIdx: 0,
EventName: "update name",
JsonArgs: `{"name":"` + ci.Args[0].(string) +
`","to":"` + ci.Args[1].(string) + `"}`,
})
case types.SetContractOwner:
ownerState, err := SetContractOwner(bs, scs, ci.Args[0].(string), nameState)
if err != nil {
return nil, err
}
ownerState.PutState()
}
nameState.PutState()
return events, nil
}
func ValidateNameTx(tx *types.TxBody, sender *state.V,
scs, systemcs *state.ContractState) (*types.CallInfo, error) {
if sender != nil && sender.Balance().Cmp(tx.GetAmountBigInt()) < 0 {
return nil, types.ErrInsufficientBalance
}
var ci types.CallInfo
if err := json.Unmarshal(tx.Payload, &ci); err != nil {
return nil, err
}
name := ci.Args[0].(string)
switch ci.Name {
case types.NameCreate:
namePrice := system.GetNamePrice(systemcs)
if namePrice.Cmp(tx.GetAmountBigInt()) > 0 {
return nil, types.ErrTooSmallAmount
}
owner := getOwner(scs, []byte(name), false)
if owner != nil {
return nil, fmt.Errorf("aleady occupied %s", string(name))
}
case types.NameUpdate:
namePrice := system.GetNamePrice(systemcs)
if namePrice.Cmp(tx.GetAmountBigInt()) > 0 {
return nil, types.ErrTooSmallAmount
}
if (!bytes.Equal(tx.Account, []byte(name))) &&
(!bytes.Equal(tx.Account, getOwner(scs, []byte(name), false))) {
return nil, fmt.Errorf("owner not matched : %s", name)
}
case types.SetContractOwner:
owner := getOwner(scs, []byte(types.AergoName), false)
if owner != nil {
return nil, fmt.Errorf("owner aleady set to %s", types.EncodeAddress(owner))
}
default:
return nil, errors.New("could not execute unknown cmd")
}
return &ci, nil
}
func SetContractOwner(bs *state.BlockState, scs *state.ContractState,
address string, nameState *state.V) (*state.V, error) {
name := []byte(types.AergoName)
rawaddr, err := types.DecodeAddress(address)
if err != nil {
return nil, err
}
ownerState, err := bs.GetAccountStateV(rawaddr)
if err != nil {
return nil, err
}
ownerState.AddBalance(nameState.Balance())
nameState.SubBalance(nameState.Balance())
if err = registerOwner(scs, name, rawaddr, name); err != nil {
return nil, err
}
return ownerState, nil
}