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rpc: implement (*Client).NEP5TokenInfo()

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It can be useful to receive all NEP5 token info at once.
This commit is contained in:
Evgenii Stratonikov 2020-03-06 16:20:23 +03:00
parent 564a8e429d
commit 22e99a5b3e
1 changed files with 18 additions and 0 deletions
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18
pkg/rpc/client/nep5.go
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@ -7,6 +7,7 @@ import (
"github.com/nspcc-dev/neo-go/pkg/smartcontract"
"github.com/nspcc-dev/neo-go/pkg/util"
"github.com/nspcc-dev/neo-go/pkg/vm/emit"
"github.com/nspcc-dev/neo-go/pkg/wallet"
)
// NEP5Decimals invokes `decimals` NEP5 method on a specified contract.
@ -69,6 +70,23 @@ func (c *Client) NEP5BalanceOf(tokenHash util.Uint160) (int64, error) {
return topIntFromStack(result.Stack)
}
// NEP5TokenInfo returns full NEP5 token info.
func (c *Client) NEP5TokenInfo(tokenHash util.Uint160) (*wallet.Token, error) {
name, err := c.NEP5Name(tokenHash)
if err != nil {
return nil, err
}
symbol, err := c.NEP5Symbol(tokenHash)
if err != nil {
return nil, err
}
decimals, err := c.NEP5Decimals(tokenHash)
if err != nil {
return nil, err
}
return wallet.NewToken(tokenHash, name, symbol, decimals), nil
}
func topIntFromStack(st []smartcontract.Parameter) (int64, error) {
index := len(st) - 1 // top stack element is last in the array
var decimals int64