neo-go/pkg/rpcclient/neptoken/info.go
Roman Khimov ed6ed61712 neptoken: add Info to replace old NEPXXTokenInfo methods
I'm still not sure it's good to have this exposed from neptoken at all, but
let's try it this way.
2022-08-29 22:52:27 +03:00

47 lines
1.2 KiB
Go

package neptoken
import (
"fmt"
"github.com/nspcc-dev/neo-go/pkg/core/state"
"github.com/nspcc-dev/neo-go/pkg/rpcclient/invoker"
"github.com/nspcc-dev/neo-go/pkg/smartcontract/manifest"
"github.com/nspcc-dev/neo-go/pkg/util"
"github.com/nspcc-dev/neo-go/pkg/wallet"
)
// InfoClient is a set of RPC methods required to get all of the NEP-11/NEP-17
// token data.
type InfoClient interface {
invoker.RPCInvoke
GetContractStateByHash(hash util.Uint160) (*state.Contract, error)
}
// Info allows to get basic token info using RPC client.
func Info(c InfoClient, hash util.Uint160) (*wallet.Token, error) {
cs, err := c.GetContractStateByHash(hash)
if err != nil {
return nil, err
}
var standard string
for _, st := range cs.Manifest.SupportedStandards {
if st == manifest.NEP17StandardName || st == manifest.NEP11StandardName {
standard = st
break
}
}
if standard == "" {
return nil, fmt.Errorf("contract %s is not NEP-11/NEP17", hash.StringLE())
}
b := New(invoker.New(c, nil), hash)
symbol, err := b.Symbol()
if err != nil {
return nil, err
}
decimals, err := b.Decimals()
if err != nil {
return nil, err
}
return wallet.NewToken(hash, cs.Manifest.Name, symbol, int64(decimals), standard), nil
}