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package apiv2
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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"
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"github.com/ethereum/go-ethereum/ethdb"
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"github.com/ethereum/go-ethereum/event"
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"github.com/ethereum/go-ethereum/rpc"
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"github.com/harmony-one/harmony/accounts"
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"github.com/harmony-one/harmony/block"
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"github.com/harmony-one/harmony/core"
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"github.com/harmony-one/harmony/core/state"
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"github.com/harmony-one/harmony/core/types"
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"github.com/harmony-one/harmony/core/vm"
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"github.com/harmony-one/harmony/internal/params"
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"github.com/harmony-one/harmony/shard"
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staking "github.com/harmony-one/harmony/staking/types"
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)
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// Backend interface provides the common API services (that are provided by
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// both full and light clients) with access to necessary functions.
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// implementations:
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// * hmy/api_backend.go
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type Backend interface {
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// NOTE(ricl): this is not in ETH Backend inteface. They put it directly in eth object.
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NetVersion() uint64
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// General Ethereum API
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// Downloader() *downloader.Downloader
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ProtocolVersion() int
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// SuggestPrice(ctx context.Context) (*big.Int, error)
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ChainDb() ethdb.Database
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EventMux() *event.TypeMux
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AccountManager() *accounts.Manager
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// ExtRPCEnabled() bool
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RPCGasCap() *big.Int // global gas cap for hmy_call over rpc: DoS protection
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// BlockChain API
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// SetHead(number uint64)
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HeaderByNumber(ctx context.Context, blockNr rpc.BlockNumber) (*block.Header, error)
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BlockByNumber(ctx context.Context, blockNr rpc.BlockNumber) (*types.Block, error)
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StateAndHeaderByNumber(ctx context.Context, blockNr rpc.BlockNumber) (*state.DB, *block.Header, error)
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GetBlock(ctx context.Context, blockHash common.Hash) (*types.Block, error)
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GetReceipts(ctx context.Context, blockHash common.Hash) (types.Receipts, error)
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// GetTd(blockHash common.Hash) *big.Int
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GetEVM(ctx context.Context, msg core.Message, state *state.DB, header *block.Header) (*vm.EVM, func() error, error)
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SubscribeChainEvent(ch chan<- core.ChainEvent) event.Subscription
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SubscribeChainHeadEvent(ch chan<- core.ChainHeadEvent) event.Subscription
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SubscribeChainSideEvent(ch chan<- core.ChainSideEvent) event.Subscription
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// TxPool API
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SendTx(ctx context.Context, signedTx *types.Transaction) error
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// GetTransaction(ctx context.Context, txHash common.Hash) (*types.Transaction, common.Hash, uint64, uint64, error)
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GetPoolTransactions() (types.Transactions, error)
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GetPoolTransaction(txHash common.Hash) *types.Transaction
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GetPoolNonce(ctx context.Context, addr common.Address) (uint64, error)
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// Stats() (pending int, queued int)
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// TxPoolContent() (map[common.Address]types.Transactions, map[common.Address]types.Transactions)
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SubscribeNewTxsEvent(chan<- core.NewTxsEvent) event.Subscription
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ChainConfig() *params.ChainConfig
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CurrentBlock() *types.Block
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// Get balance
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GetBalance(address common.Address) (*big.Int, error)
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// Get validators for a particular epoch
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GetValidators(epoch *big.Int) (*shard.Committee, error)
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GetShardID() uint32
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// Get transactions history for an address
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GetTransactionsHistory(address, txType, order string) ([]common.Hash, error)
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// retrieve the blockHash using txID and add blockHash to CxPool for resending
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ResendCx(ctx context.Context, txID common.Hash) (uint64, bool)
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IsLeader() bool
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SendStakingTx(ctx context.Context, newStakingTx *staking.StakingTransaction) error
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GetActiveValidatorAddresses() []common.Address
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GetAllValidatorAddresses() []common.Address
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GetValidatorInformation(addr common.Address) *staking.Validator
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GetValidatorStats(addr common.Address) *staking.ValidatorStats
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GetDelegationsByValidator(validator common.Address) []*staking.Delegation
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GetDelegationsByDelegator(delegator common.Address) ([]common.Address, []*staking.Delegation)
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GetValidatorSelfDelegation(addr common.Address) *big.Int
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GetShardState() (*shard.State, error)
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GetCurrentStakingErrorSink() []staking.RPCTransactionError
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GetCurrentTransactionErrorSink() []types.RPCTransactionError
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GetMedianRawStakeSnapshot() *big.Int
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GetPendingCXReceipts() []*types.CXReceiptsProof
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}
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