ce9d0b22cf
Standards are NEP-11 and NEP-17, not NEP11, not NEP17, not anything else. Variable/function names of course can use whatever fits, but documents and comments should be consistent wrt this.
239 lines
7.8 KiB
Go
239 lines
7.8 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/core/transaction"
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"github.com/nspcc-dev/neo-go/pkg/encoding/address"
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"github.com/nspcc-dev/neo-go/pkg/io"
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"github.com/nspcc-dev/neo-go/pkg/smartcontract"
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"github.com/nspcc-dev/neo-go/pkg/smartcontract/callflag"
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"github.com/nspcc-dev/neo-go/pkg/smartcontract/manifest"
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"github.com/nspcc-dev/neo-go/pkg/util"
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"github.com/nspcc-dev/neo-go/pkg/vm/emit"
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"github.com/nspcc-dev/neo-go/pkg/vm/opcode"
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"github.com/nspcc-dev/neo-go/pkg/vm/stackitem"
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"github.com/nspcc-dev/neo-go/pkg/wallet"
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)
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// NEP11Decimals invokes `decimals` NEP-11 method on a specified contract.
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func (c *Client) NEP11Decimals(tokenHash util.Uint160) (int64, error) {
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return c.nepDecimals(tokenHash)
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}
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// NEP11Symbol invokes `symbol` NEP-11 method on a specified contract.
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func (c *Client) NEP11Symbol(tokenHash util.Uint160) (string, error) {
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return c.nepSymbol(tokenHash)
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}
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// NEP11TotalSupply invokes `totalSupply` NEP-11 method on a specified contract.
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func (c *Client) NEP11TotalSupply(tokenHash util.Uint160) (int64, error) {
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return c.nepTotalSupply(tokenHash)
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}
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// NEP11BalanceOf invokes `balanceOf` NEP-11 method on a specified contract.
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func (c *Client) NEP11BalanceOf(tokenHash, owner util.Uint160) (int64, error) {
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return c.nepBalanceOf(tokenHash, owner, nil)
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}
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// NEP11TokenInfo returns full NEP-11 token info.
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func (c *Client) NEP11TokenInfo(tokenHash util.Uint160) (*wallet.Token, error) {
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return c.nepTokenInfo(tokenHash, manifest.NEP11StandardName)
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}
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// TransferNEP11 creates an invocation transaction that invokes 'transfer' method
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// on a given token to move the whole NEP-11 token with the specified token ID to
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// given account and sends it to the network returning just a hash of it.
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func (c *Client) TransferNEP11(acc *wallet.Account, to util.Uint160,
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tokenHash util.Uint160, tokenID string, data interface{}, gas int64, cosigners []SignerAccount) (util.Uint256, error) {
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if !c.initDone {
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return util.Uint256{}, errNetworkNotInitialized
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}
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tx, err := c.CreateNEP11TransferTx(acc, tokenHash, gas, cosigners, to, tokenID, data)
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if err != nil {
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return util.Uint256{}, err
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}
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return c.SignAndPushTx(tx, acc, cosigners)
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}
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// CreateNEP11TransferTx creates an invocation transaction for the 'transfer'
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// method of a given contract (token) to move the whole (or the specified amount
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// of) NEP-11 token with the specified token ID to given account and returns it.
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// The returned transaction is not signed. CreateNEP11TransferTx is also a
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// helper for TransferNEP11 and TransferNEP11D.
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// `args` for TransferNEP11: to util.Uint160, tokenID string, data interface{};
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// `args` for TransferNEP11D: from, to util.Uint160, amount int64, tokenID string, data interface{}.
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func (c *Client) CreateNEP11TransferTx(acc *wallet.Account, tokenHash util.Uint160,
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gas int64, cosigners []SignerAccount, args ...interface{}) (*transaction.Transaction, error) {
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w := io.NewBufBinWriter()
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emit.AppCall(w.BinWriter, tokenHash, "transfer", callflag.All, args...)
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emit.Opcodes(w.BinWriter, opcode.ASSERT)
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if w.Err != nil {
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return nil, fmt.Errorf("failed to create NEP-11 transfer script: %w", w.Err)
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}
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from, err := address.StringToUint160(acc.Address)
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if err != nil {
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return nil, fmt.Errorf("bad account address: %w", err)
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}
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return c.CreateTxFromScript(w.Bytes(), acc, -1, gas, append([]SignerAccount{{
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Signer: transaction.Signer{
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Account: from,
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Scopes: transaction.CalledByEntry,
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},
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Account: acc,
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}}, cosigners...))
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}
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// NEP11TokensOf returns an array of token IDs for the specified owner of the specified NFT token.
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func (c *Client) NEP11TokensOf(tokenHash util.Uint160, owner util.Uint160) ([]string, error) {
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result, err := c.InvokeFunction(tokenHash, "tokensOf", []smartcontract.Parameter{
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{
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Type: smartcontract.Hash160Type,
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Value: owner,
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},
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}, nil)
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if err != nil {
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return nil, err
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}
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err = getInvocationError(result)
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if err != nil {
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return nil, err
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}
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arr, err := topIterableFromStack(result.Stack, string(""))
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if err != nil {
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return nil, fmt.Errorf("failed to get token IDs from stack: %w", err)
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}
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ids := make([]string, len(arr))
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for i := range ids {
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ids[i] = arr[i].(string)
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}
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return ids, nil
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}
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// Non-divisible NFT methods section start.
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// NEP11NDOwnerOf invokes `ownerOf` non-devisible NEP-11 method with the
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// specified token ID on a specified contract.
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func (c *Client) NEP11NDOwnerOf(tokenHash util.Uint160, tokenID string) (util.Uint160, error) {
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result, err := c.InvokeFunction(tokenHash, "ownerOf", []smartcontract.Parameter{
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{
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Type: smartcontract.StringType,
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Value: tokenID,
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},
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}, nil)
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if err != nil {
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return util.Uint160{}, err
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}
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err = getInvocationError(result)
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if err != nil {
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return util.Uint160{}, err
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}
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return topUint160FromStack(result.Stack)
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}
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// Non-divisible NFT methods section end.
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// Divisible NFT methods section start.
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// TransferNEP11D creates an invocation transaction that invokes 'transfer'
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// method on a given token to move specified amount of divisible NEP-11 assets
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// (in FixedN format using contract's number of decimals) to given account and
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// sends it to the network returning just a hash of it.
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func (c *Client) TransferNEP11D(acc *wallet.Account, to util.Uint160,
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tokenHash util.Uint160, amount int64, tokenID string, data interface{}, gas int64, cosigners []SignerAccount) (util.Uint256, error) {
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if !c.initDone {
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return util.Uint256{}, errNetworkNotInitialized
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}
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from, err := address.StringToUint160(acc.Address)
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if err != nil {
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return util.Uint256{}, fmt.Errorf("bad account address: %w", err)
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}
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tx, err := c.CreateNEP11TransferTx(acc, tokenHash, gas, cosigners, from, to, amount, tokenID, data)
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if err != nil {
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return util.Uint256{}, err
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}
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return c.SignAndPushTx(tx, acc, cosigners)
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}
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// NEP11DBalanceOf invokes `balanceOf` divisible NEP-11 method on a
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// specified contract.
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func (c *Client) NEP11DBalanceOf(tokenHash, owner util.Uint160, tokenID string) (int64, error) {
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return c.nepBalanceOf(tokenHash, owner, &tokenID)
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}
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// NEP11DOwnerOf returns list of the specified NEP-11 divisible token owners.
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func (c *Client) NEP11DOwnerOf(tokenHash util.Uint160, tokenID string) ([]util.Uint160, error) {
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result, err := c.InvokeFunction(tokenHash, "ownerOf", []smartcontract.Parameter{
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{
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Type: smartcontract.StringType,
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Value: tokenID,
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},
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}, nil)
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if err != nil {
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return nil, err
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}
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err = getInvocationError(result)
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if err != nil {
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return nil, err
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}
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arr, err := topIterableFromStack(result.Stack, util.Uint160{})
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if err != nil {
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return nil, fmt.Errorf("failed to get token IDs from stack: %w", err)
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}
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owners := make([]util.Uint160, len(arr))
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for i := range owners {
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owners[i] = arr[i].(util.Uint160)
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}
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return owners, nil
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}
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// Divisible NFT methods section end.
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// Optional NFT methods section start.
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// NEP11Properties invokes `properties` optional NEP-11 method on a
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// specified contract.
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func (c *Client) NEP11Properties(tokenHash util.Uint160, tokenID string) (*stackitem.Map, error) {
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result, err := c.InvokeFunction(tokenHash, "properties", []smartcontract.Parameter{{
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Type: smartcontract.StringType,
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Value: tokenID,
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}}, nil)
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if err != nil {
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return nil, err
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}
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err = getInvocationError(result)
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if err != nil {
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return nil, err
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}
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return topMapFromStack(result.Stack)
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}
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// NEP11Tokens returns list of the tokens minted by the contract.
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func (c *Client) NEP11Tokens(tokenHash util.Uint160) ([]string, error) {
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result, err := c.InvokeFunction(tokenHash, "tokens", []smartcontract.Parameter{}, nil)
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if err != nil {
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return nil, err
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}
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err = getInvocationError(result)
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if err != nil {
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return nil, err
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}
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arr, err := topIterableFromStack(result.Stack, string(""))
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if err != nil {
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return nil, fmt.Errorf("failed to get token IDs from stack: %w", err)
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}
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tokens := make([]string, len(arr))
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for i := range tokens {
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tokens[i] = arr[i].(string)
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}
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return tokens, nil
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}
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// Optional NFT methods section end.
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