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rpc_client.go
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rpc_client.go
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package sdk
import (
"bytes"
"encoding/json"
"fmt"
"io/ioutil"
"math/big"
"net/http"
"time"
"github.com/Ammer-Tech/casper-golang-sdk/keypair"
"github.com/pkg/errors"
)
type RpcClient struct {
endpoint string
}
func NewRpcClient(endpoint string) *RpcClient {
return &RpcClient{
endpoint: endpoint,
}
}
func (c *RpcClient) GetDeploy(hash string) (DeployResult, error) {
resp, err := c.rpcCall("info_get_deploy", map[string]string{
"deploy_hash": hash,
})
if err != nil {
return DeployResult{}, err
}
var result DeployResult
err = json.Unmarshal(resp.Result, &result)
if err != nil {
return DeployResult{}, fmt.Errorf("failed to get result: %w", err)
}
return result, nil
}
func (c *RpcClient) GetStateItem(stateRootHash, key string, path []string) (StoredValue, error) {
params := map[string]interface{}{
"state_root_hash": stateRootHash,
"key": key,
}
if len(path) > 0 {
params["path"] = path
}
resp, err := c.rpcCall("state_get_item", params)
if err != nil {
return StoredValue{}, err
}
var result storedValueResult
err = json.Unmarshal(resp.Result, &result)
if err != nil {
return StoredValue{}, fmt.Errorf("failed to get result: %w", err)
}
return result.StoredValue, nil
}
func (c *RpcClient) GetAccountBalance(stateRootHash, balanceUref string) (big.Int, error) {
resp, err := c.rpcCall("state_get_balance", map[string]string{
"state_root_hash": stateRootHash,
"purse_uref": balanceUref,
})
if err != nil {
return big.Int{}, err
}
var result balanceResponse
err = json.Unmarshal(resp.Result, &result)
if err != nil {
return big.Int{}, fmt.Errorf("failed to get result: %w", err)
}
balance := big.Int{}
balance.SetString(result.BalanceValue, 10)
return balance, nil
}
func (c *RpcClient) GetAccountMainPurseURef(accountHash string) string {
block, err := c.GetLatestBlock()
if err != nil {
return ""
}
item, err := c.GetStateItem(block.Header.StateRootHash, accountHash, []string{})
if err != nil {
return ""
}
return item.Account.MainPurse
}
func (c *RpcClient) GetAccountBalanceByKeypair(stateRootHash string, key keypair.KeyPair) (big.Int, error) {
item, err := c.GetStateItem(stateRootHash, key.AccountHash(), []string{})
if err != nil {
return big.Int{}, err
}
return c.GetAccountBalance(stateRootHash, item.Account.MainPurse)
}
func (c *RpcClient) GetLatestBlock() (BlockResponse, error) {
resp, err := c.rpcCall("chain_get_block", nil)
if err != nil {
return BlockResponse{}, err
}
var result blockResult
err = json.Unmarshal(resp.Result, &result)
if err != nil {
return BlockResponse{}, fmt.Errorf("failed to get result: %w", err)
}
return result.Block, nil
}
func (c *RpcClient) GetBlockByHeight(height uint64) (BlockResponse, error) {
resp, err := c.rpcCall("chain_get_block",
blockParams{blockIdentifier{
Height: height,
}})
if err != nil {
return BlockResponse{}, err
}
var result blockResult
err = json.Unmarshal(resp.Result, &result)
if err != nil {
return BlockResponse{}, fmt.Errorf("failed to get result: %w", err)
}
return result.Block, nil
}
func (c *RpcClient) GetBlockByHash(hash string) (BlockResponse, error) {
resp, err := c.rpcCall("chain_get_block",
blockParams{blockIdentifier{
Hash: hash,
}})
if err != nil {
return BlockResponse{}, err
}
var result blockResult
err = json.Unmarshal(resp.Result, &result)
if err != nil {
return BlockResponse{}, fmt.Errorf("failed to get result: %w", err)
}
return result.Block, nil
}
func (c *RpcClient) GetLatestBlockTransfers() ([]TransferResponse, error) {
resp, err := c.rpcCall("chain_get_block_transfers", nil)
if err != nil {
return nil, err
}
var result transferResult
err = json.Unmarshal(resp.Result, &result)
if err != nil {
return nil, fmt.Errorf("failed to get result: %w", err)
}
return result.Transfers, nil
}
func (c *RpcClient) GetBlockTransfersByHeight(height uint64) ([]TransferResponse, error) {
resp, err := c.rpcCall("chain_get_block_transfers",
blockParams{blockIdentifier{
Height: height,
}})
if err != nil {
return nil, err
}
var result transferResult
err = json.Unmarshal(resp.Result, &result)
if err != nil {
return nil, fmt.Errorf("failed to get result: %w", err)
}
return result.Transfers, nil
}
func (c *RpcClient) GetBlockTransfersByHash(blockHash string) ([]TransferResponse, error) {
resp, err := c.rpcCall("chain_get_block_transfers",
blockParams{blockIdentifier{
Hash: blockHash,
}})
if err != nil {
return nil, err
}
var result transferResult
err = json.Unmarshal(resp.Result, &result)
if err != nil {
return nil, fmt.Errorf("failed to get result: %w", err)
}
return result.Transfers, nil
}
func (c *RpcClient) GetValidator() (ValidatorPesponse, error) {
resp, err := c.rpcCall("state_get_auction_info", nil)
if err != nil {
return ValidatorPesponse{}, err
}
var result validatorResult
err = json.Unmarshal(resp.Result, &result)
if err != nil {
return ValidatorPesponse{}, fmt.Errorf("failed to get result: #{err}")
}
return result.Validator, nil
}
func (c *RpcClient) GetStatus() (StatusResult, error) {
resp, err := c.rpcCall("info_get_status", nil)
if err != nil {
return StatusResult{}, err
}
var result StatusResult
err = json.Unmarshal(resp.Result, &result)
if err != nil {
return StatusResult{}, fmt.Errorf("failed to get result: #{err}")
}
return result, nil
}
func (c *RpcClient) GetPeers() (PeerResult, error) {
resp, err := c.rpcCall("info_get_peers", nil)
if err != nil {
return PeerResult{}, err
}
var result PeerResult
err = json.Unmarshal(resp.Result, &result)
if err != nil {
return PeerResult{}, fmt.Errorf("failed to get result: #{err}")
}
return result, nil
}
func (c *RpcClient) GetStateRootHash(stateRootHash string) (StateRootHashResult, error) {
resp, err := c.rpcCall("chain_get_state_root_hash", map[string]string{
"state_root_hash": stateRootHash,
})
if err != nil {
return StateRootHashResult{}, err
}
var result StateRootHashResult
err = json.Unmarshal(resp.Result, &result)
if err != nil {
return StateRootHashResult{}, fmt.Errorf("failed to get result: %w", err)
}
return result, nil
}
func (c *RpcClient) PutDeploy(deploy Deploy) (JsonPutDeployRes, error) {
resp, err := c.rpcCall("account_put_deploy", map[string]interface{}{
"deploy": deploy,
})
if err != nil {
return JsonPutDeployRes{}, err
}
var result JsonPutDeployRes
err = json.Unmarshal(resp.Result, &result)
if err != nil {
return JsonPutDeployRes{}, fmt.Errorf("failed to put deploy: %w", err)
}
return result, nil
}
func (c *RpcClient) rpcCall(method string, params interface{}) (RpcResponse, error) {
body, err := json.Marshal(RpcRequest{
Version: "2.0",
Method: method,
Params: params,
})
if err != nil {
return RpcResponse{}, errors.Wrap(err, "failed to marshal json")
}
resp, err := http.Post(c.endpoint, "application/json", bytes.NewReader(body))
if err != nil {
return RpcResponse{}, fmt.Errorf("failed to make request: %w", err)
}
defer resp.Body.Close()
b, err := ioutil.ReadAll(resp.Body)
if err != nil {
return RpcResponse{}, fmt.Errorf("failed to get response body: %w", err)
}
if resp.StatusCode < http.StatusOK || resp.StatusCode >= http.StatusMultipleChoices {
return RpcResponse{}, fmt.Errorf("request failed, status code - %d, response - %s", resp.StatusCode, string(b))
}
var rpcResponse RpcResponse
err = json.Unmarshal(b, &rpcResponse)
if err != nil {
return RpcResponse{}, fmt.Errorf("failed to parse response body: %w", err)
}
if rpcResponse.Error != nil {
return rpcResponse, fmt.Errorf("rpc call failed, code - %d, message - %s", rpcResponse.Error.Code, rpcResponse.Error.Message)
}
return rpcResponse, nil
}
type RpcRequest struct {
Version string `json:"jsonrpc"`
Id string `json:"id"`
Method string `json:"method"`
Params interface{} `json:"params"`
}
type RpcResponse struct {
Version string `json:"jsonrpc"`
Id string `json:"id"`
Result json.RawMessage `json:"result"`
Error *RpcError `json:"error,omitempty"`
}
type RpcError struct {
Code int `json:"code"`
Message string `json:"message"`
}
type transferResult struct {
Transfers []TransferResponse `json:"transfers"`
}
type TransferResponse struct {
ID int64 `json:"id,omitempty"`
DeployHash string `json:"deploy_hash"`
From string `json:"from"`
To string `json:"to"`
Source string `json:"source"`
Target string `json:"target"`
Amount string `json:"amount"`
Gas string `json:"gas"`
}
type blockResult struct {
Block BlockResponse `json:"block"`
}
type BlockResponse struct {
Hash string `json:"hash"`
Header BlockHeader `json:"header"`
Body BlockBody `json:"body"`
Proofs []Proof `json:"proofs"`
}
type BlockHeader struct {
ParentHash string `json:"parent_hash"`
StateRootHash string `json:"state_root_hash"`
BodyHash string `json:"body_hash"`
RandomBit bool `json:"random_bit"`
AccumulatedSeed string `json:"accumulated_seed"`
Timestamp time.Time `json:"timestamp"`
EraID int `json:"era_id"`
Height int `json:"height"`
ProtocolVersion string `json:"protocol_version"`
}
type BlockBody struct {
Proposer string `json:"proposer"`
DeployHashes []string `json:"deploy_hashes"`
TransferHashes []string `json:"transfer_hashes"`
}
type Proof struct {
PublicKey string `json:"public_key"`
Signature string `json:"signature"`
}
type DeployResult struct {
Deploy JsonDeploy `json:"deploy"`
ExecutionResults []JsonExecutionResult `json:"execution_results"`
}
type JsonDeploy struct {
Hash string `json:"hash"`
Header JsonDeployHeader `json:"header"`
Approvals []JsonApproval `json:"approvals"`
}
type JsonPutDeployRes struct {
Hash string `json:"deploy_hash"`
}
type JsonDeployHeader struct {
Account string `json:"account"`
Timestamp time.Time `json:"timestamp"`
TTL string `json:"ttl"`
GasPrice int `json:"gas_price"`
BodyHash string `json:"body_hash"`
Dependencies []string `json:"dependencies"`
ChainName string `json:"chain_name"`
}
type JsonApproval struct {
Signer string `json:"signer"`
Signature string `json:"signature"`
}
type JsonExecutionResult struct {
BlockHash string `json:"block_hash"`
Result ExecutionResult `json:"result"`
}
type ExecutionResult struct {
Success SuccessExecutionResult `json:"success"`
ErrorMessage *string `json:"error_message,omitempty"`
}
type SuccessExecutionResult struct {
Transfers []string `json:"transfers"`
Cost string `json:"cost"`
}
type storedValueResult struct {
StoredValue StoredValue `json:"stored_value"`
}
type StoredValue struct {
CLValue *JsonCLValue `json:"CLValue,omitempty"`
Account *JsonAccount `json:"Account,omitempty"`
Contract *JsonContractMetadata `json:"Contract,omitempty"`
ContractWASM *string `json:"ContractWASM,omitempty"`
ContractPackage *string `json:"ContractPackage,omitempty"`
Transfer *TransferResponse `json:"Transfer,omitempty"`
DeployInfo *JsonDeployInfo `json:"DeployInfo,omitempty"`
}
type JsonCLValue struct {
Bytes string `json:"bytes"`
CLType string `json:"cl_type"`
Parsed interface{} `json:"parsed"`
}
type JsonAccount struct {
AccountHash string `json:"account_hash"`
NamedKeys []NamedKey `json:"named_keys"`
MainPurse string `json:"main_purse"`
AssociatedKeys []AssociatedKey `json:"associated_keys"`
ActionThresholds ActionThresholds `json:"action_thresholds"`
}
type NamedKey struct {
Name string `json:"name"`
Key string `json:"key"`
}
type AssociatedKey struct {
AccountHash string `json:"account_hash"`
Weight uint64 `json:"weight"`
}
type ActionThresholds struct {
Deployment uint64 `json:"deployment"`
KeyManagement uint64 `json:"key_management"`
}
type JsonContractMetadata struct {
ContractPackageHash string `json:"contract_package_hash"`
ContractWasmHash string `json:"contract_wasm_hash"`
ProtocolVersion string `json:"protocol_version"`
}
type JsonDeployInfo struct {
DeployHash string `json:"deploy_hash"`
Transfers []string `json:"transfers"`
From string `json:"from"`
Source string `json:"source"`
Gas string `json:"gas"`
}
type blockParams struct {
BlockIdentifier blockIdentifier `json:"block_identifier"`
}
type blockIdentifier struct {
Hash string `json:"Hash,omitempty"`
Height uint64 `json:"Height,omitempty"`
}
type balanceResponse struct {
BalanceValue string `json:"balance_value"`
}
type ValidatorWeight struct {
PublicKey string `json:"public_key"`
Weight string `json:"weight"`
}
type EraValidators struct {
EraId int `json:"era_id"`
ValidatorWeights []ValidatorWeight `json:"validator_weights"`
}
type AuctionState struct {
StateRootHash string `json:"state_root_hash"`
BlockHeight uint64 `json:"block_height"`
EraValidators []EraValidators `json:"era_validators"`
}
type ValidatorPesponse struct {
Version string `json:"jsonrpc"`
AuctionState `json:"auction_state"`
}
type validatorResult struct {
Validator ValidatorPesponse `json:"validator"`
}
type StatusResult struct {
LastAddedBlock BlockResponse `json:"last_added_block"`
BuildVersion string `json:"build_version"`
}
type Peer struct {
NodeId string `json:"node_id"`
Address string `json:"address"`
}
type PeerResult struct {
Peers []Peer `json:"peers"`
}
type StateRootHashResult struct {
StateRootHash string `json:"state_root_hash"`
}