/
types.go
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/
types.go
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// Copyright 2022 The AmazeChain Authors
// This file is part of the AmazeChain library.
//
// The AmazeChain library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The AmazeChain library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the AmazeChain library. If not, see <http://www.gnu.org/licenses/>.
package jsonrpc
import (
"context"
"encoding/json"
"fmt"
"github.com/amazechain/amc/common/hexutil"
"math"
"strconv"
"strings"
"github.com/amazechain/amc/common/types"
)
type API struct {
Namespace string
Service interface{}
Authenticated bool // whether the api should only be available behind authentication.
}
type ServerCodec interface {
readBatch() (msgs []*jsonrpcMessage, isBatch bool, err error)
close()
jsonWriter
}
type jsonWriter interface {
writeJSON(context.Context, interface{}) error
// Closed returns a channel which is closed when the connection is closed.
closed() <-chan interface{}
// RemoteAddr returns the peer address of the connection.
remoteAddr() string
}
type BlockNumber int64
const (
SafeBlockNumber = BlockNumber(-4)
FinalizedBlockNumber = BlockNumber(-3)
PendingBlockNumber = BlockNumber(-2)
LatestBlockNumber = BlockNumber(-1)
EarliestBlockNumber = BlockNumber(0)
)
func (bn *BlockNumber) UnmarshalJSON(data []byte) error {
input := strings.TrimSpace(string(data))
if len(input) >= 2 && input[0] == '"' && input[len(input)-1] == '"' {
input = input[1 : len(input)-1]
}
switch input {
case "earliest":
*bn = EarliestBlockNumber
return nil
case "latest":
*bn = LatestBlockNumber
return nil
case "pending":
*bn = PendingBlockNumber
return nil
case "finalized":
*bn = FinalizedBlockNumber
return nil
case "safe":
*bn = SafeBlockNumber
return nil
}
blckNum, err := DecodeUint64(input)
if err != nil {
return err
}
if blckNum > math.MaxInt64 {
return fmt.Errorf("block number larger than int64")
}
*bn = BlockNumber(blckNum)
return nil
}
func (bn BlockNumber) Int64() int64 {
return (int64)(bn)
}
type BlockNumberOrHash struct {
BlockNumber *BlockNumber `json:"blockNumber,omitempty"`
BlockHash *types.Hash `json:"blockHash,omitempty"`
RequireCanonical bool `json:"requireCanonical,omitempty"`
}
func (bnh *BlockNumberOrHash) UnmarshalJSON(data []byte) error {
type erased BlockNumberOrHash
e := erased{}
err := json.Unmarshal(data, &e)
if err == nil {
if e.BlockNumber != nil && e.BlockHash != nil {
return fmt.Errorf("cannot specify both BlockHash and BlockNumber, choose one or the other")
}
bnh.BlockNumber = e.BlockNumber
bnh.BlockHash = e.BlockHash
bnh.RequireCanonical = e.RequireCanonical
return nil
}
var input string
err = json.Unmarshal(data, &input)
if err != nil {
return err
}
switch input {
case "earliest":
bn := EarliestBlockNumber
bnh.BlockNumber = &bn
return nil
case "latest":
bn := LatestBlockNumber
bnh.BlockNumber = &bn
return nil
case "pending":
bn := PendingBlockNumber
bnh.BlockNumber = &bn
return nil
default:
if len(input) == 66 {
hash := types.Hash{}
err := UnmarshalText(hash, []byte(input))
if err != nil {
return err
}
bnh.BlockHash = &hash
return nil
} else {
blckNum, err := DecodeUint64(input)
if err != nil {
return err
}
if blckNum > math.MaxInt64 {
return fmt.Errorf("blocknumber too high")
}
bn := BlockNumber(blckNum)
bnh.BlockNumber = &bn
return nil
}
}
}
func (bnh *BlockNumberOrHash) Number() (BlockNumber, bool) {
if bnh.BlockNumber != nil {
return *bnh.BlockNumber, true
}
return BlockNumber(0), false
}
func (bnh *BlockNumberOrHash) Hash() (types.Hash, bool) {
if bnh.BlockHash != nil {
return *bnh.BlockHash, true
}
return types.Hash{}, false
}
func BlockNumberOrHashWithNumber(blockNr BlockNumber) BlockNumberOrHash {
return BlockNumberOrHash{
BlockNumber: &blockNr,
BlockHash: nil,
RequireCanonical: false,
}
}
func BlockNumberOrHashWithHash(hash types.Hash, canonical bool) BlockNumberOrHash {
return BlockNumberOrHash{
BlockNumber: nil,
BlockHash: &hash,
RequireCanonical: canonical,
}
}
func (bnh *BlockNumberOrHash) String() string {
if bnh.BlockNumber != nil {
return strconv.Itoa(int(*bnh.BlockNumber))
}
if bnh.BlockHash != nil {
return bnh.BlockHash.String()
}
return "nil"
}
// DecimalOrHex unmarshals a non-negative decimal or hex parameter into a uint64.
type DecimalOrHex uint64
// UnmarshalJSON implements json.Unmarshaler.
func (dh *DecimalOrHex) UnmarshalJSON(data []byte) error {
input := strings.TrimSpace(string(data))
if len(input) >= 2 && input[0] == '"' && input[len(input)-1] == '"' {
input = input[1 : len(input)-1]
}
value, err := strconv.ParseUint(input, 10, 64)
if err != nil {
value, err = hexutil.DecodeUint64(input)
}
if err != nil {
return err
}
*dh = DecimalOrHex(value)
return nil
}