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blockchain.go
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blockchain.go
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package rpc
import (
"context"
"fmt"
"math/big"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/common/hexutil"
"github.com/ethereum/go-ethereum/rpc"
"github.com/harmony-one/harmony/hmy"
"github.com/harmony-one/harmony/internal/chain"
internal_common "github.com/harmony-one/harmony/internal/common"
nodeconfig "github.com/harmony-one/harmony/internal/configs/node"
"github.com/harmony-one/harmony/internal/utils"
"github.com/harmony-one/harmony/numeric"
rpc_common "github.com/harmony-one/harmony/rpc/common"
eth "github.com/harmony-one/harmony/rpc/eth"
v1 "github.com/harmony-one/harmony/rpc/v1"
v2 "github.com/harmony-one/harmony/rpc/v2"
"github.com/harmony-one/harmony/shard"
stakingReward "github.com/harmony-one/harmony/staking/reward"
)
// PublicBlockchainService provides an API to access the Harmony blockchain.
// It offers only methods that operate on public data that is freely available to anyone.
type PublicBlockchainService struct {
hmy *hmy.Harmony
version Version
}
// NewPublicBlockchainAPI creates a new API for the RPC interface
func NewPublicBlockchainAPI(hmy *hmy.Harmony, version Version) rpc.API {
return rpc.API{
Namespace: version.Namespace(),
Version: APIVersion,
Service: &PublicBlockchainService{hmy, version},
Public: true,
}
}
// ChainId returns the chain id of the chain - required by MetaMask
func (s *PublicBlockchainService) ChainId(ctx context.Context) (interface{}, error) {
// Format return base on version
switch s.version {
case V1:
return hexutil.Uint64(s.hmy.ChainID), nil
case V2:
return s.hmy.ChainID, nil
case Eth:
ethChainID := nodeconfig.GetDefaultConfig().GetNetworkType().ChainConfig().EthCompatibleChainID
return hexutil.Uint64(ethChainID.Uint64()), nil
default:
return nil, ErrUnknownRPCVersion
}
}
// Accounts returns the collection of accounts this node manages
// While this JSON-RPC method is supported, it will not return any accounts.
// Similar to e.g. Infura "unlocking" accounts isn't supported.
// Instead, users should send already signed raw transactions using hmy_sendRawTransaction or eth_sendRawTransaction
func (s *PublicBlockchainService) Accounts() []common.Address {
return []common.Address{}
}
// getBlockOptions is a helper to get block args given an interface option from RPC params.
func (s *PublicBlockchainService) getBlockOptions(opts interface{}) (*rpc_common.BlockArgs, error) {
switch s.version {
case V1, Eth:
fullTx, ok := opts.(bool)
if !ok {
return nil, fmt.Errorf("invalid type for block arguments")
}
return &rpc_common.BlockArgs{
WithSigners: false,
FullTx: fullTx,
InclStaking: true,
}, nil
case V2:
parsedBlockArgs := rpc_common.BlockArgs{}
if err := parsedBlockArgs.UnmarshalFromInterface(opts); err != nil {
return nil, err
}
return &parsedBlockArgs, nil
default:
return nil, ErrUnknownRPCVersion
}
}
// getBalanceByBlockNumber returns balance by block number at given eth blockNum without checks
func (s *PublicBlockchainService) getBalanceByBlockNumber(
ctx context.Context, address string, blockNum rpc.BlockNumber,
) (*big.Int, error) {
addr, err := internal_common.ParseAddr(address)
if err != nil {
return nil, err
}
balance, err := s.hmy.GetBalance(ctx, addr, blockNum)
if err != nil {
return nil, err
}
return balance, nil
}
// BlockNumber returns the block number of the chain head.
func (s *PublicBlockchainService) BlockNumber(ctx context.Context) (interface{}, error) {
// Fetch latest header
header, err := s.hmy.HeaderByNumber(ctx, rpc.LatestBlockNumber)
if err != nil {
return nil, err
}
// Format return base on version
switch s.version {
case V1, Eth:
return hexutil.Uint64(header.Number().Uint64()), nil
case V2:
return header.Number().Uint64(), nil
default:
return nil, ErrUnknownRPCVersion
}
}
// GetBlockByNumber returns the requested block. When blockNum is -1 the chain head is returned. When fullTx is true all
// transactions in the block are returned in full detail, otherwise only the transaction hash is returned.
// When withSigners in BlocksArgs is true it shows block signers for this block in list of one addresses.
func (s *PublicBlockchainService) GetBlockByNumber(
ctx context.Context, blockNumber BlockNumber, opts interface{},
) (response StructuredResponse, err error) {
// Process arguments based on version
blockNum := blockNumber.EthBlockNumber()
var blockArgs *rpc_common.BlockArgs
blockArgs, ok := opts.(*rpc_common.BlockArgs)
if !ok {
blockArgs, err = s.getBlockOptions(opts)
if err != nil {
return nil, err
}
}
blockArgs.InclTx = true
// Some Ethereum tools (such as Truffle) rely on being able to query for future blocks without the chain returning errors.
// These tools implement retry mechanisms that will query & retry for a given block until it has been finalized.
// Throwing an error like "requested block number greater than current block number" breaks this retry functionality.
// Disable isBlockGreaterThanLatest checks for Ethereum RPC:s, but keep them in place for legacy hmy_ RPC:s for now to ensure backwards compatibility
if s.version != Eth && isBlockGreaterThanLatest(s.hmy, blockNum) {
return nil, ErrRequestedBlockTooHigh
}
blk, err := s.hmy.BlockByNumber(ctx, blockNum)
if blk != nil && err == nil {
if blockArgs.WithSigners {
blockArgs.Signers, err = s.GetBlockSigners(ctx, blockNumber)
if err != nil {
return nil, err
}
}
// Format the response according to version
leader := s.hmy.GetLeaderAddress(blk.Header().Coinbase(), blk.Header().Epoch())
var rpcBlock interface{}
switch s.version {
case V1:
rpcBlock, err = v1.NewBlock(blk, blockArgs, leader)
case V2:
rpcBlock, err = v2.NewBlock(blk, blockArgs, leader)
case Eth:
rpcBlock, err = eth.NewBlock(blk, blockArgs, leader)
default:
return nil, ErrUnknownRPCVersion
}
if err != nil {
return nil, err
}
response, err = NewStructuredResponse(rpcBlock)
if err != nil {
return nil, err
}
// Pending blocks need to nil out a few fields
if blockNum == rpc.PendingBlockNumber {
for _, field := range []string{"hash", "nonce", "miner"} {
response[field] = nil
}
}
return response, err
}
return nil, err
}
// GetBlockByHash returns the requested block. When fullTx is true all transactions in the block are returned in full
// detail, otherwise only the transaction hash is returned. When withSigners in BlocksArgs is true
// it shows block signers for this block in list of one addresses.
func (s *PublicBlockchainService) GetBlockByHash(
ctx context.Context, blockHash common.Hash, opts interface{},
) (response StructuredResponse, err error) {
// Process arguments based on version
var blockArgs *rpc_common.BlockArgs
blockArgs, ok := opts.(*rpc_common.BlockArgs)
if !ok {
blockArgs, err = s.getBlockOptions(opts)
if err != nil {
return nil, err
}
}
blockArgs.InclTx = true
// Fetch the block
blk, err := s.hmy.GetBlock(ctx, blockHash)
if blk != nil && err == nil {
if blockArgs.WithSigners {
blockArgs.Signers, err = s.GetBlockSigners(ctx, BlockNumber(blk.NumberU64()))
if err != nil {
return nil, err
}
}
// Format the response according to version
leader := s.hmy.GetLeaderAddress(blk.Header().Coinbase(), blk.Header().Epoch())
var rpcBlock interface{}
switch s.version {
case V1:
rpcBlock, err = v1.NewBlock(blk, blockArgs, leader)
case V2:
rpcBlock, err = v2.NewBlock(blk, blockArgs, leader)
case Eth:
rpcBlock, err = eth.NewBlock(blk, blockArgs, leader)
default:
return nil, ErrUnknownRPCVersion
}
if err != nil {
return nil, err
}
return NewStructuredResponse(rpcBlock)
}
return nil, err
}
// GetBlockByNumberNew is an alias for GetBlockByNumber using rpc_common.BlockArgs
func (s *PublicBlockchainService) GetBlockByNumberNew(
ctx context.Context, blockNum BlockNumber, blockArgs *rpc_common.BlockArgs,
) (StructuredResponse, error) {
return s.GetBlockByNumber(ctx, blockNum, blockArgs)
}
// GetBlockByHashNew is an alias for GetBlocksByHash using rpc_common.BlockArgs
func (s *PublicBlockchainService) GetBlockByHashNew(
ctx context.Context, blockHash common.Hash, blockArgs *rpc_common.BlockArgs,
) (StructuredResponse, error) {
return s.GetBlockByHash(ctx, blockHash, blockArgs)
}
// GetBlocks method returns blocks in range blockStart, blockEnd just like GetBlockByNumber but all at once.
func (s *PublicBlockchainService) GetBlocks(
ctx context.Context, blockNumberStart BlockNumber,
blockNumberEnd BlockNumber, blockArgs *rpc_common.BlockArgs,
) ([]StructuredResponse, error) {
blockStart := blockNumberStart.Int64()
blockEnd := blockNumberEnd.Int64()
// Fetch blocks within given range
result := []StructuredResponse{}
for i := blockStart; i <= blockEnd; i++ {
blockNum := BlockNumber(i)
if blockNum.Int64() > s.hmy.CurrentBlock().Number().Int64() {
break
}
// rpcBlock is already formatted according to version
rpcBlock, err := s.GetBlockByNumber(ctx, blockNum, blockArgs)
if err != nil {
utils.Logger().Warn().Err(err).Msg("RPC Get Blocks Error")
}
if rpcBlock != nil {
result = append(result, rpcBlock)
}
}
return result, nil
}
// IsLastBlock checks if block is last epoch block.
func (s *PublicBlockchainService) IsLastBlock(ctx context.Context, blockNum uint64) (bool, error) {
if !isBeaconShard(s.hmy) {
return false, ErrNotBeaconShard
}
return shard.Schedule.IsLastBlock(blockNum), nil
}
// EpochLastBlock returns epoch last block.
func (s *PublicBlockchainService) EpochLastBlock(ctx context.Context, epoch uint64) (uint64, error) {
if !isBeaconShard(s.hmy) {
return 0, ErrNotBeaconShard
}
return shard.Schedule.EpochLastBlock(epoch), nil
}
// GetBlockSigners returns signers for a particular block.
func (s *PublicBlockchainService) GetBlockSigners(
ctx context.Context, blockNumber BlockNumber,
) ([]string, error) {
// Process arguments based on version
blockNum := blockNumber.EthBlockNumber()
// Ensure correct block
if blockNum.Int64() == 0 || blockNum.Int64() >= s.hmy.CurrentBlock().Number().Int64() {
return []string{}, nil
}
if isBlockGreaterThanLatest(s.hmy, blockNum) {
return nil, ErrRequestedBlockTooHigh
}
// Fetch signers
slots, mask, err := s.hmy.GetBlockSigners(ctx, blockNum)
if err != nil {
return nil, err
}
// Response output is the same for all versions
signers := []string{}
for _, validator := range slots {
oneAddress, err := internal_common.AddressToBech32(validator.EcdsaAddress)
if err != nil {
return nil, err
}
if ok, err := mask.KeyEnabled(validator.BLSPublicKey); err == nil && ok {
signers = append(signers, oneAddress)
}
}
return signers, nil
}
// GetBlockSignerKeys returns bls public keys that signed the block.
func (s *PublicBlockchainService) GetBlockSignerKeys(
ctx context.Context, blockNumber BlockNumber,
) ([]string, error) {
// Process arguments based on version
blockNum := blockNumber.EthBlockNumber()
// Ensure correct block
if blockNum.Int64() == 0 || blockNum.Int64() >= s.hmy.CurrentBlock().Number().Int64() {
return []string{}, nil
}
if isBlockGreaterThanLatest(s.hmy, blockNum) {
return nil, ErrRequestedBlockTooHigh
}
// Fetch signers
slots, mask, err := s.hmy.GetBlockSigners(ctx, blockNum)
if err != nil {
return nil, err
}
// Response output is the same for all versions
signers := []string{}
for _, validator := range slots {
if ok, err := mask.KeyEnabled(validator.BLSPublicKey); err == nil && ok {
signers = append(signers, validator.BLSPublicKey.Hex())
}
}
return signers, nil
}
// IsBlockSigner returns true if validator with address signed blockNum block.
func (s *PublicBlockchainService) IsBlockSigner(
ctx context.Context, blockNumber BlockNumber, address string,
) (bool, error) {
// Process arguments based on version
blockNum := blockNumber.EthBlockNumber()
// Ensure correct block
if blockNum.Int64() == 0 {
return false, nil
}
if isBlockGreaterThanLatest(s.hmy, blockNum) {
return false, ErrRequestedBlockTooHigh
}
// Fetch signers
slots, mask, err := s.hmy.GetBlockSigners(ctx, blockNum)
if err != nil {
return false, err
}
// Check if given address is in slots (response output is the same for all versions)
for _, validator := range slots {
oneAddress, err := internal_common.AddressToBech32(validator.EcdsaAddress)
if err != nil {
return false, err
}
if oneAddress != address {
continue
}
if ok, err := mask.KeyEnabled(validator.BLSPublicKey); err == nil && ok {
return true, nil
}
}
return false, nil
}
// GetSignedBlocks returns how many blocks a particular validator signed for
// last blocksPeriod (1 epoch's worth of blocks).
func (s *PublicBlockchainService) GetSignedBlocks(
ctx context.Context, address string,
) (interface{}, error) {
// Fetch the number of signed blocks within default period
totalSigned := uint64(0)
lastBlock := uint64(0)
blockHeight := s.hmy.CurrentBlock().Number().Uint64()
instance := shard.Schedule.InstanceForEpoch(s.hmy.CurrentBlock().Epoch())
if blockHeight >= instance.BlocksPerEpoch() {
lastBlock = blockHeight - instance.BlocksPerEpoch() + 1
}
for i := lastBlock; i <= blockHeight; i++ {
signed, err := s.IsBlockSigner(ctx, BlockNumber(i), address)
if err == nil && signed {
totalSigned++
}
}
// Format the response according to the version
switch s.version {
case V1, Eth:
return hexutil.Uint64(totalSigned), nil
case V2:
return totalSigned, nil
default:
return nil, ErrUnknownRPCVersion
}
}
// GetEpoch returns current epoch.
func (s *PublicBlockchainService) GetEpoch(ctx context.Context) (interface{}, error) {
// Fetch Header
header, err := s.hmy.HeaderByNumber(ctx, rpc.LatestBlockNumber)
if err != nil {
return "", err
}
epoch := header.Epoch().Uint64()
// Format the response according to the version
switch s.version {
case V1, Eth:
return hexutil.Uint64(epoch), nil
case V2:
return epoch, nil
default:
return nil, ErrUnknownRPCVersion
}
}
// GetLeader returns current shard leader.
func (s *PublicBlockchainService) GetLeader(ctx context.Context) (string, error) {
// Fetch Header
header, err := s.hmy.HeaderByNumber(ctx, rpc.LatestBlockNumber)
if err != nil {
return "", err
}
// Response output is the same for all versions
leader := s.hmy.GetLeaderAddress(header.Coinbase(), header.Epoch())
return leader, nil
}
// GetShardingStructure returns an array of sharding structures.
func (s *PublicBlockchainService) GetShardingStructure(
ctx context.Context,
) ([]StructuredResponse, error) {
// Get header and number of shards.
epoch := s.hmy.CurrentBlock().Epoch()
numShard := shard.Schedule.InstanceForEpoch(epoch).NumShards()
// Return sharding structure for each case (response output is the same for all versions)
return shard.Schedule.GetShardingStructure(int(numShard), int(s.hmy.ShardID)), nil
}
// GetShardID returns shard ID of the requested node.
func (s *PublicBlockchainService) GetShardID(ctx context.Context) (int, error) {
// Response output is the same for all versions
return int(s.hmy.ShardID), nil
}
// GetBalanceByBlockNumber returns balance by block number
func (s *PublicBlockchainService) GetBalanceByBlockNumber(
ctx context.Context, address string, blockNumber BlockNumber,
) (interface{}, error) {
// Process number based on version
blockNum := blockNumber.EthBlockNumber()
// Fetch balance
if isBlockGreaterThanLatest(s.hmy, blockNum) {
return nil, ErrRequestedBlockTooHigh
}
balance, err := s.getBalanceByBlockNumber(ctx, address, blockNum)
if err != nil {
return nil, err
}
// Format return base on version
switch s.version {
case V1, Eth:
return (*hexutil.Big)(balance), nil
case V2:
return balance, nil
default:
return nil, ErrUnknownRPCVersion
}
}
// LatestHeader returns the latest header information
func (s *PublicBlockchainService) LatestHeader(ctx context.Context) (StructuredResponse, error) {
// Fetch Header
header, err := s.hmy.HeaderByNumber(ctx, rpc.LatestBlockNumber)
if err != nil {
return nil, err
}
// Response output is the same for all versions
leader := s.hmy.GetLeaderAddress(header.Coinbase(), header.Epoch())
return NewStructuredResponse(NewHeaderInformation(header, leader))
}
// GetLatestChainHeaders ..
func (s *PublicBlockchainService) GetLatestChainHeaders(
ctx context.Context,
) (StructuredResponse, error) {
// Response output is the same for all versions
return NewStructuredResponse(s.hmy.GetLatestChainHeaders())
}
// GetLastCrossLinks ..
func (s *PublicBlockchainService) GetLastCrossLinks(
ctx context.Context,
) ([]StructuredResponse, error) {
if !isBeaconShard(s.hmy) {
return nil, ErrNotBeaconShard
}
// Fetch crosslinks
crossLinks, err := s.hmy.GetLastCrossLinks()
if err != nil {
return nil, err
}
// Format response, all output is the same for all versions
responseSlice := []StructuredResponse{}
for _, el := range crossLinks {
response, err := NewStructuredResponse(el)
if err != nil {
return nil, err
}
responseSlice = append(responseSlice, response)
}
return responseSlice, nil
}
// GetHeaderByNumber returns block header at given number
func (s *PublicBlockchainService) GetHeaderByNumber(
ctx context.Context, blockNumber BlockNumber,
) (StructuredResponse, error) {
// Process number based on version
blockNum := blockNumber.EthBlockNumber()
// Ensure valid block number
if s.version != Eth && isBlockGreaterThanLatest(s.hmy, blockNum) {
return nil, ErrRequestedBlockTooHigh
}
// Fetch Header
header, err := s.hmy.HeaderByNumber(ctx, blockNum)
if header != nil && err == nil {
// Response output is the same for all versions
leader := s.hmy.GetLeaderAddress(header.Coinbase(), header.Epoch())
return NewStructuredResponse(NewHeaderInformation(header, leader))
}
return nil, err
}
// GetCurrentUtilityMetrics ..
func (s *PublicBlockchainService) GetCurrentUtilityMetrics(
ctx context.Context,
) (StructuredResponse, error) {
if !isBeaconShard(s.hmy) {
return nil, ErrNotBeaconShard
}
// Fetch metrics
metrics, err := s.hmy.GetCurrentUtilityMetrics()
if err != nil {
return nil, err
}
// Response output is the same for all versions
return NewStructuredResponse(metrics)
}
// GetSuperCommittees ..
func (s *PublicBlockchainService) GetSuperCommittees(
ctx context.Context,
) (StructuredResponse, error) {
if !isBeaconShard(s.hmy) {
return nil, ErrNotBeaconShard
}
// Fetch super committees
cmt, err := s.hmy.GetSuperCommittees()
if err != nil {
return nil, err
}
// Response output is the same for all versions
return NewStructuredResponse(cmt)
}
// GetCurrentBadBlocks ..
func (s *PublicBlockchainService) GetCurrentBadBlocks(
ctx context.Context,
) ([]StructuredResponse, error) {
// Fetch bad blocks and format
badBlocks := []StructuredResponse{}
for _, blk := range s.hmy.GetCurrentBadBlocks() {
// Response output is the same for all versions
fmtBadBlock, err := NewStructuredResponse(blk)
if err != nil {
return nil, err
}
badBlocks = append(badBlocks, fmtBadBlock)
}
return badBlocks, nil
}
// GetTotalSupply ..
func (s *PublicBlockchainService) GetTotalSupply(
ctx context.Context,
) (numeric.Dec, error) {
return stakingReward.GetTotalTokens(s.hmy.BlockChain)
}
// GetCirculatingSupply ...
func (s *PublicBlockchainService) GetCirculatingSupply(
ctx context.Context,
) (numeric.Dec, error) {
return chain.GetCirculatingSupply(ctx, s.hmy.BlockChain)
}
// GetStakingNetworkInfo ..
func (s *PublicBlockchainService) GetStakingNetworkInfo(
ctx context.Context,
) (StructuredResponse, error) {
if !isBeaconShard(s.hmy) {
return nil, ErrNotBeaconShard
}
totalStaking := s.hmy.GetTotalStakingSnapshot()
header, err := s.hmy.HeaderByNumber(ctx, rpc.LatestBlockNumber)
if err != nil {
return nil, err
}
medianSnapshot, err := s.hmy.GetMedianRawStakeSnapshot()
if err != nil {
return nil, err
}
epochLastBlock, err := s.EpochLastBlock(ctx, header.Epoch().Uint64())
if err != nil {
return nil, err
}
totalSupply, err := s.GetTotalSupply(ctx)
if err != nil {
return nil, err
}
circulatingSupply, err := s.GetCirculatingSupply(ctx)
if err != nil {
return nil, err
}
// Response output is the same for all versions
return NewStructuredResponse(StakingNetworkInfo{
TotalSupply: totalSupply,
CirculatingSupply: circulatingSupply,
EpochLastBlock: epochLastBlock,
TotalStaking: totalStaking,
MedianRawStake: medianSnapshot.MedianStake,
})
}
// InSync returns if shard chain is syncing
func (s *PublicBlockchainService) InSync(ctx context.Context) (bool, error) {
return !s.hmy.NodeAPI.IsOutOfSync(s.hmy.BlockChain.ShardID()), nil
}
// BeaconInSync returns if beacon chain is syncing
func (s *PublicBlockchainService) BeaconInSync(ctx context.Context) (bool, error) {
return !s.hmy.NodeAPI.IsOutOfSync(s.hmy.BeaconChain.ShardID()), nil
}
func isBlockGreaterThanLatest(hmy *hmy.Harmony, blockNum rpc.BlockNumber) bool {
// rpc.BlockNumber is int64 (latest = -1. pending = -2) and currentBlockNum is uint64.
if blockNum == rpc.PendingBlockNumber {
return true
}
if blockNum == rpc.LatestBlockNumber {
return false
}
return uint64(blockNum) > hmy.CurrentBlock().NumberU64()
}