neo-go/pkg/rpc/rpc.go

189 lines
5.9 KiB
Go

package rpc
import (
"encoding/hex"
"fmt"
"github.com/CityOfZion/neo-go/pkg/core/transaction"
"github.com/CityOfZion/neo-go/pkg/crypto/keys"
"github.com/CityOfZion/neo-go/pkg/smartcontract"
"github.com/CityOfZion/neo-go/pkg/util"
"github.com/pkg/errors"
)
// getBlock returns a block by its hash or index/height. If verbose is true
// the response will contain a pretty Block object instead of the raw hex string.
// missing output wrapper at the moment, thus commented out
// func (c *Client) getBlock(indexOrHash interface{}, verbose bool) (*response, error) {
// var (
// params = newParams(indexOrHash)
// resp = &response{}
// )
// if verbose {
// params = newParams(indexOrHash, 1)
// }
// if err := c.performRequest("getblock", params, resp); err != nil {
// return nil, err
// }
// return resp, nil
// }
// GetAccountState returns detailed information about a NEO account.
func (c *Client) GetAccountState(address string) (*AccountStateResponse, error) {
var (
params = newParams(address)
resp = &AccountStateResponse{}
)
if err := c.performRequest("getaccountstate", params, resp); err != nil {
return nil, err
}
return resp, nil
}
// GetUnspents returns UTXOs for the given NEO account.
func (c *Client) GetUnspents(address string) (*UnspentResponse, error) {
var (
params = newParams(address)
resp = &UnspentResponse{}
)
if err := c.performRequest("getunspents", params, resp); err != nil {
return nil, err
}
return resp, nil
}
// InvokeScript returns the result of the given script after running it true the VM.
// NOTE: This is a test invoke and will not affect the blockchain.
func (c *Client) InvokeScript(script string) (*InvokeScriptResponse, error) {
var (
params = newParams(script)
resp = &InvokeScriptResponse{}
)
if err := c.performRequest("invokescript", params, resp); err != nil {
return nil, err
}
return resp, nil
}
// InvokeFunction returns the results after calling the smart contract scripthash
// with the given operation and parameters.
// NOTE: this is test invoke and will not affect the blockchain.
func (c *Client) InvokeFunction(script, operation string, params []smartcontract.Parameter) (*InvokeScriptResponse, error) {
var (
p = newParams(script, operation, params)
resp = &InvokeScriptResponse{}
)
if err := c.performRequest("invokefunction", p, resp); err != nil {
return nil, err
}
return resp, nil
}
// Invoke returns the results after calling the smart contract scripthash
// with the given parameters.
func (c *Client) Invoke(script string, params []smartcontract.Parameter) (*InvokeScriptResponse, error) {
var (
p = newParams(script, params)
resp = &InvokeScriptResponse{}
)
if err := c.performRequest("invoke", p, resp); err != nil {
return nil, err
}
return resp, nil
}
// getRawTransaction queries a transaction by hash.
// missing output wrapper at the moment, thus commented out
// func (c *Client) getRawTransaction(hash string, verbose bool) (*response, error) {
// var (
// params = newParams(hash, verbose)
// resp = &response{}
// )
// if err := c.performRequest("getrawtransaction", params, resp); err != nil {
// return nil, err
// }
// return resp, nil
// }
// sendRawTransaction broadcasts a transaction over the NEO network.
// The given hex string needs to be signed with a keypair.
// When the result of the response object is true, the TX has successfully
// been broadcasted to the network.
func (c *Client) sendRawTransaction(rawTX *transaction.Transaction) (*response, error) {
var (
params = newParams(hex.EncodeToString(rawTX.Bytes()))
resp = &response{}
)
if err := c.performRequest("sendrawtransaction", params, resp); err != nil {
return nil, err
}
return resp, nil
}
// SendToAddress sends an amount of specific asset to a given address.
// This call requires open wallet. (`wif` key in client struct.)
// If response.Result is `true` then transaction was formed correctly and was written in blockchain.
func (c *Client) SendToAddress(asset util.Uint256, address string, amount util.Fixed8) (*SendToAddressResponse, error) {
var (
err error
rawTx *transaction.Transaction
txParams = ContractTxParams{
assetID: asset,
address: address,
value: amount,
wif: c.WIF(),
balancer: c.Balancer(),
}
resp *response
response = &SendToAddressResponse{}
)
if rawTx, err = CreateRawContractTransaction(txParams); err != nil {
return nil, errors.Wrap(err, "failed to create raw transaction for `sendtoaddress`")
}
if resp, err = c.sendRawTransaction(rawTx); err != nil {
return nil, errors.Wrap(err, "failed to send raw transaction")
}
response.Error = resp.Error
response.ID = resp.ID
response.JSONRPC = resp.JSONRPC
response.Result = &TxResponse{
TxID: rawTx.Hash().ReverseString(),
}
return response, nil
}
// SignAndPushInvocationTx signs and pushes given script as an invocation
// transaction using given wif to sign it and spending the amount of gas
// specified. It returns a hash of the invocation transaction and an error.
func (c *Client) SignAndPushInvocationTx(script []byte, wif *keys.WIF, gas util.Fixed8) (util.Uint256, error) {
var txHash util.Uint256
var err error
gasIDB, _ := hex.DecodeString("602c79718b16e442de58778e148d0b1084e3b2dffd5de6b7b16cee7969282de7")
gasID, _ := util.Uint256DecodeReverseBytes(gasIDB)
tx := transaction.NewInvocationTX(script, gas)
fromAddress := wif.PrivateKey.Address()
if gas > 0 {
if err = AddInputsAndUnspentsToTx(tx, fromAddress, gasID, gas, c); err != nil {
return txHash, errors.Wrap(err, "failed to add inputs and unspents to transaction")
}
}
if err = SignTx(tx, wif); err != nil {
return txHash, errors.Wrap(err, "failed to sign tx")
}
txHash = tx.Hash()
resp, err := c.sendRawTransaction(tx)
if err != nil {
return txHash, errors.Wrap(err, "failed sendning tx")
}
if resp.Error != nil {
return txHash, fmt.Errorf("remote returned %d: %s", resp.Error.Code, resp.Error.Message)
}
return txHash, nil
}