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101 lines
3.2 KiB
101 lines
3.2 KiB
package rpc
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import (
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"context"
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"math/big"
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"github.com/ethereum/go-ethereum/common/hexutil"
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"github.com/harmony-one/harmony/eth/rpc"
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"github.com/harmony-one/harmony/hmy"
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)
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// PublicHarmonyService provides an API to access Harmony related information.
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// It offers only methods that operate on public data that is freely available to anyone.
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type PublicHarmonyService struct {
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hmy *hmy.Harmony
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version Version
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}
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// NewPublicHarmonyAPI creates a new API for the RPC interface
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func NewPublicHarmonyAPI(hmy *hmy.Harmony, version Version) rpc.API {
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return rpc.API{
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Namespace: version.Namespace(),
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Version: APIVersion,
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Service: &PublicHarmonyService{hmy, version},
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Public: true,
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}
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}
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// ProtocolVersion returns the current Harmony protocol version this node supports
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// Note that the return type is an interface to account for the different versions
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func (s *PublicHarmonyService) ProtocolVersion(
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ctx context.Context,
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) (interface{}, error) {
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// Format response according to version
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switch s.version {
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case V1, Eth:
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return hexutil.Uint(s.hmy.ProtocolVersion()), nil
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case V2:
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return s.hmy.ProtocolVersion(), nil
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default:
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return nil, ErrUnknownRPCVersion
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}
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}
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// Syncing returns false in case the node is currently not syncing with the network. It can be up to date or has not
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// yet received the latest block headers from its pears. In case it is synchronizing:
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// - startingBlock: block number this node started to synchronise from
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// - currentBlock: block number this node is currently importing
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// - highestBlock: block number of the highest block header this node has received from peers
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// - pulledStates: number of state entries processed until now
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// - knownStates: number of known state entries that still need to be pulled
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func (s *PublicHarmonyService) Syncing(
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ctx context.Context,
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) (interface{}, error) {
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// TODO(dm): find our Downloader module for syncing blocks
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return false, nil
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}
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// GasPrice returns a suggestion for a gas price.
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// Note that the return type is an interface to account for the different versions
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func (s *PublicHarmonyService) GasPrice(ctx context.Context) (interface{}, error) {
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price, err := s.hmy.SuggestPrice(ctx)
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if err != nil || price.Cmp(big.NewInt(3e10)) < 0 {
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price = big.NewInt(3e10)
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}
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// Format response according to version
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switch s.version {
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case V1, Eth:
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return (*hexutil.Big)(price), nil
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case V2:
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return price.Uint64(), nil
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default:
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return nil, ErrUnknownRPCVersion
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}
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}
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// GetNodeMetadata produces a NodeMetadata record, data is from the answering RPC node
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func (s *PublicHarmonyService) GetNodeMetadata(
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ctx context.Context,
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) (StructuredResponse, error) {
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// Response output is the same for all versions
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return NewStructuredResponse(s.hmy.GetNodeMetadata())
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}
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// GetPeerInfo produces a NodePeerInfo record
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func (s *PublicHarmonyService) GetPeerInfo(
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ctx context.Context,
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) (StructuredResponse, error) {
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// Response output is the same for all versions
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return NewStructuredResponse(s.hmy.GetPeerInfo())
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}
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// GetNumPendingCrossLinks returns length of hmy.BlockChain.ReadPendingCrossLinks()
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func (s *PublicHarmonyService) GetNumPendingCrossLinks() (int, error) {
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links, err := s.hmy.BlockChain.ReadPendingCrossLinks()
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if err != nil {
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return 0, err
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}
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return len(links), nil
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}
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