mirror of
https://github.com/nspcc-dev/neo-go.git
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102 lines
2.6 KiB
Go
102 lines
2.6 KiB
Go
package client
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import (
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"fmt"
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"github.com/nspcc-dev/neo-go/pkg/smartcontract"
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"github.com/nspcc-dev/neo-go/pkg/util"
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"github.com/nspcc-dev/neo-go/pkg/wallet"
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)
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// nepDecimals invokes `decimals` NEP* method on the specified contract.
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func (c *Client) nepDecimals(tokenHash util.Uint160) (int64, error) {
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result, err := c.InvokeFunction(tokenHash, "decimals", []smartcontract.Parameter{}, nil)
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if err != nil {
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return 0, err
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}
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err = getInvocationError(result)
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if err != nil {
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return 0, err
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}
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return topIntFromStack(result.Stack)
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}
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// nepSymbol invokes `symbol` NEP* method on the specified contract.
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func (c *Client) nepSymbol(tokenHash util.Uint160) (string, error) {
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result, err := c.InvokeFunction(tokenHash, "symbol", []smartcontract.Parameter{}, nil)
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if err != nil {
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return "", err
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}
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err = getInvocationError(result)
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if err != nil {
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return "", err
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}
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return topStringFromStack(result.Stack)
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}
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// nepTotalSupply invokes `totalSupply` NEP* method on the specified contract.
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func (c *Client) nepTotalSupply(tokenHash util.Uint160) (int64, error) {
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result, err := c.InvokeFunction(tokenHash, "totalSupply", []smartcontract.Parameter{}, nil)
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if err != nil {
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return 0, err
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}
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err = getInvocationError(result)
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if err != nil {
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return 0, err
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}
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return topIntFromStack(result.Stack)
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}
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// nepBalanceOf invokes `balanceOf` NEP* method on the specified contract.
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func (c *Client) nepBalanceOf(tokenHash, acc util.Uint160, tokenID []byte) (int64, error) {
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params := []smartcontract.Parameter{{
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Type: smartcontract.Hash160Type,
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Value: acc,
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}}
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if tokenID != nil {
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params = append(params, smartcontract.Parameter{
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Type: smartcontract.ByteArrayType,
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Value: tokenID,
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})
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}
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result, err := c.InvokeFunction(tokenHash, "balanceOf", params, nil)
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if err != nil {
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return 0, err
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}
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err = getInvocationError(result)
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if err != nil {
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return 0, err
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}
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return topIntFromStack(result.Stack)
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}
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// nepTokenInfo returns full NEP* token info.
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func (c *Client) nepTokenInfo(tokenHash util.Uint160, standard string) (*wallet.Token, error) {
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cs, err := c.GetContractStateByHash(tokenHash)
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if err != nil {
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return nil, err
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}
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var isStandardOK bool
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for _, st := range cs.Manifest.SupportedStandards {
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if st == standard {
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isStandardOK = true
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break
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}
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}
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if !isStandardOK {
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return nil, fmt.Errorf("token %s does not support %s standard", tokenHash.StringLE(), standard)
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}
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symbol, err := c.nepSymbol(tokenHash)
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if err != nil {
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return nil, err
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}
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decimals, err := c.nepDecimals(tokenHash)
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if err != nil {
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return nil, err
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}
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return wallet.NewToken(tokenHash, cs.Manifest.Name, symbol, decimals, standard), nil
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}
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