neoneo-go/pkg/rpc/client/nep.go
2021-03-26 20:48:01 +03:00

72 lines
1.8 KiB
Go

package client
import (
"github.com/nspcc-dev/neo-go/pkg/smartcontract"
"github.com/nspcc-dev/neo-go/pkg/util"
)
// nepDecimals invokes `decimals` NEP* method on a specified contract.
func (c *Client) nepDecimals(tokenHash util.Uint160) (int64, error) {
result, err := c.InvokeFunction(tokenHash, "decimals", []smartcontract.Parameter{}, nil)
if err != nil {
return 0, err
}
err = getInvocationError(result)
if err != nil {
return 0, err
}
return topIntFromStack(result.Stack)
}
// nepSymbol invokes `symbol` NEP* method on a specified contract.
func (c *Client) nepSymbol(tokenHash util.Uint160) (string, error) {
result, err := c.InvokeFunction(tokenHash, "symbol", []smartcontract.Parameter{}, nil)
if err != nil {
return "", err
}
err = getInvocationError(result)
if err != nil {
return "", err
}
return topStringFromStack(result.Stack)
}
// nepTotalSupply invokes `totalSupply` NEP* method on a specified contract.
func (c *Client) nepTotalSupply(tokenHash util.Uint160) (int64, error) {
result, err := c.InvokeFunction(tokenHash, "totalSupply", []smartcontract.Parameter{}, nil)
if err != nil {
return 0, err
}
err = getInvocationError(result)
if err != nil {
return 0, err
}
return topIntFromStack(result.Stack)
}
// nepBalanceOf invokes `balanceOf` NEP* method on a specified contract.
func (c *Client) nepBalanceOf(tokenHash, acc util.Uint160, tokenID *string) (int64, error) {
params := []smartcontract.Parameter{{
Type: smartcontract.Hash160Type,
Value: acc,
}}
if tokenID != nil {
params = append(params, smartcontract.Parameter{
Type: smartcontract.StringType,
Value: *tokenID,
})
}
result, err := c.InvokeFunction(tokenHash, "balanceOf", params, nil)
if err != nil {
return 0, err
}
err = getInvocationError(result)
if err != nil {
return 0, err
}
return topIntFromStack(result.Stack)
}