diff options
Diffstat (limited to 'vendor/github.com/ethereum/go-ethereum')
17 files changed, 3817 insertions, 0 deletions
diff --git a/vendor/github.com/ethereum/go-ethereum/common/big.go b/vendor/github.com/ethereum/go-ethereum/common/big.go new file mode 100644 index 000000000..65d4377bf --- /dev/null +++ b/vendor/github.com/ethereum/go-ethereum/common/big.go @@ -0,0 +1,30 @@ +// Copyright 2014 The go-ethereum Authors +// This file is part of the go-ethereum library. +// +// The go-ethereum 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 go-ethereum 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 go-ethereum library. If not, see <http://www.gnu.org/licenses/>. + +package common + +import "math/big" + +// Common big integers often used +var ( + Big1 = big.NewInt(1) + Big2 = big.NewInt(2) + Big3 = big.NewInt(3) + Big0 = big.NewInt(0) + Big32 = big.NewInt(32) + Big256 = big.NewInt(256) + Big257 = big.NewInt(257) +) diff --git a/vendor/github.com/ethereum/go-ethereum/common/bytes.go b/vendor/github.com/ethereum/go-ethereum/common/bytes.go new file mode 100644 index 000000000..c82e61624 --- /dev/null +++ b/vendor/github.com/ethereum/go-ethereum/common/bytes.go @@ -0,0 +1,138 @@ +// Copyright 2014 The go-ethereum Authors +// This file is part of the go-ethereum library. +// +// The go-ethereum 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 go-ethereum 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 go-ethereum library. If not, see <http://www.gnu.org/licenses/>. + +// Package common contains various helper functions. +package common + +import "encoding/hex" + +// ToHex returns the hex representation of b, prefixed with '0x'. +// For empty slices, the return value is "0x0". +// +// Deprecated: use hexutil.Encode instead. +func ToHex(b []byte) string { + hex := Bytes2Hex(b) + if len(hex) == 0 { + hex = "0" + } + return "0x" + hex +} + +// ToHexArray creates a array of hex-string based on []byte +func ToHexArray(b [][]byte) []string { + r := make([]string, len(b)) + for i := range b { + r[i] = ToHex(b[i]) + } + return r +} + +// FromHex returns the bytes represented by the hexadecimal string s. +// s may be prefixed with "0x". +func FromHex(s string) []byte { + if len(s) > 1 { + if s[0:2] == "0x" || s[0:2] == "0X" { + s = s[2:] + } + } + if len(s)%2 == 1 { + s = "0" + s + } + return Hex2Bytes(s) +} + +// CopyBytes returns an exact copy of the provided bytes. +func CopyBytes(b []byte) (copiedBytes []byte) { + if b == nil { + return nil + } + copiedBytes = make([]byte, len(b)) + copy(copiedBytes, b) + + return +} + +// hasHexPrefix validates str begins with '0x' or '0X'. +func hasHexPrefix(str string) bool { + return len(str) >= 2 && str[0] == '0' && (str[1] == 'x' || str[1] == 'X') +} + +// isHexCharacter returns bool of c being a valid hexadecimal. +func isHexCharacter(c byte) bool { + return ('0' <= c && c <= '9') || ('a' <= c && c <= 'f') || ('A' <= c && c <= 'F') +} + +// isHex validates whether each byte is valid hexadecimal string. +func isHex(str string) bool { + if len(str)%2 != 0 { + return false + } + for _, c := range []byte(str) { + if !isHexCharacter(c) { + return false + } + } + return true +} + +// Bytes2Hex returns the hexadecimal encoding of d. +func Bytes2Hex(d []byte) string { + return hex.EncodeToString(d) +} + +// Hex2Bytes returns the bytes represented by the hexadecimal string str. +func Hex2Bytes(str string) []byte { + h, _ := hex.DecodeString(str) + return h +} + +// Hex2BytesFixed returns bytes of a specified fixed length flen. +func Hex2BytesFixed(str string, flen int) []byte { + h, _ := hex.DecodeString(str) + if len(h) == flen { + return h + } + if len(h) > flen { + return h[len(h)-flen:] + } + hh := make([]byte, flen) + copy(hh[flen-len(h):flen], h) + return hh +} + +// RightPadBytes zero-pads slice to the right up to length l. +func RightPadBytes(slice []byte, l int) []byte { + if l <= len(slice) { + return slice + } + + padded := make([]byte, l) + copy(padded, slice) + + return padded +} + +// LeftPadBytes zero-pads slice to the left up to length l. +func LeftPadBytes(slice []byte, l int) []byte { + if l <= len(slice) { + return slice + } + + padded := make([]byte, l) + copy(padded[l-len(slice):], slice) + + return padded +} diff --git a/vendor/github.com/ethereum/go-ethereum/common/debug.go b/vendor/github.com/ethereum/go-ethereum/common/debug.go new file mode 100644 index 000000000..61acd8ce7 --- /dev/null +++ b/vendor/github.com/ethereum/go-ethereum/common/debug.go @@ -0,0 +1,52 @@ +// Copyright 2015 The go-ethereum Authors +// This file is part of the go-ethereum library. +// +// The go-ethereum 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 go-ethereum 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 go-ethereum library. If not, see <http://www.gnu.org/licenses/>. + +package common + +import ( + "fmt" + "os" + "runtime" + "runtime/debug" + "strings" +) + +// Report gives off a warning requesting the user to submit an issue to the github tracker. +func Report(extra ...interface{}) { + fmt.Fprintln(os.Stderr, "You've encountered a sought after, hard to reproduce bug. Please report this to the developers <3 https://github.com/ethereum/go-ethereum/issues") + fmt.Fprintln(os.Stderr, extra...) + + _, file, line, _ := runtime.Caller(1) + fmt.Fprintf(os.Stderr, "%v:%v\n", file, line) + + debug.PrintStack() + + fmt.Fprintln(os.Stderr, "#### BUG! PLEASE REPORT ####") +} + +// PrintDepricationWarning prinst the given string in a box using fmt.Println. +func PrintDepricationWarning(str string) { + line := strings.Repeat("#", len(str)+4) + emptyLine := strings.Repeat(" ", len(str)) + fmt.Printf(` +%s +# %s # +# %s # +# %s # +%s + +`, line, emptyLine, str, emptyLine, line) +} diff --git a/vendor/github.com/ethereum/go-ethereum/common/format.go b/vendor/github.com/ethereum/go-ethereum/common/format.go new file mode 100644 index 000000000..6fc21af71 --- /dev/null +++ b/vendor/github.com/ethereum/go-ethereum/common/format.go @@ -0,0 +1,82 @@ +// Copyright 2016 The go-ethereum Authors +// This file is part of the go-ethereum library. +// +// The go-ethereum 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 go-ethereum 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 go-ethereum library. If not, see <http://www.gnu.org/licenses/>. + +package common + +import ( + "fmt" + "regexp" + "strings" + "time" +) + +// PrettyDuration is a pretty printed version of a time.Duration value that cuts +// the unnecessary precision off from the formatted textual representation. +type PrettyDuration time.Duration + +var prettyDurationRe = regexp.MustCompile(`\.[0-9]+`) + +// String implements the Stringer interface, allowing pretty printing of duration +// values rounded to three decimals. +func (d PrettyDuration) String() string { + label := fmt.Sprintf("%v", time.Duration(d)) + if match := prettyDurationRe.FindString(label); len(match) > 4 { + label = strings.Replace(label, match, match[:4], 1) + } + return label +} + +// PrettyAge is a pretty printed version of a time.Duration value that rounds +// the values up to a single most significant unit, days/weeks/years included. +type PrettyAge time.Time + +// ageUnits is a list of units the age pretty printing uses. +var ageUnits = []struct { + Size time.Duration + Symbol string +}{ + {12 * 30 * 24 * time.Hour, "y"}, + {30 * 24 * time.Hour, "mo"}, + {7 * 24 * time.Hour, "w"}, + {24 * time.Hour, "d"}, + {time.Hour, "h"}, + {time.Minute, "m"}, + {time.Second, "s"}, +} + +// String implements the Stringer interface, allowing pretty printing of duration +// values rounded to the most significant time unit. +func (t PrettyAge) String() string { + // Calculate the time difference and handle the 0 cornercase + diff := time.Since(time.Time(t)) + if diff < time.Second { + return "0" + } + // Accumulate a precision of 3 components before returning + result, prec := "", 0 + + for _, unit := range ageUnits { + if diff > unit.Size { + result = fmt.Sprintf("%s%d%s", result, diff/unit.Size, unit.Symbol) + diff %= unit.Size + + if prec += 1; prec >= 3 { + break + } + } + } + return result +} diff --git a/vendor/github.com/ethereum/go-ethereum/common/hexutil/hexutil.go b/vendor/github.com/ethereum/go-ethereum/common/hexutil/hexutil.go new file mode 100644 index 000000000..46223a281 --- /dev/null +++ b/vendor/github.com/ethereum/go-ethereum/common/hexutil/hexutil.go @@ -0,0 +1,240 @@ +// Copyright 2016 The go-ethereum Authors +// This file is part of the go-ethereum library. +// +// The go-ethereum 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 go-ethereum 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 go-ethereum library. If not, see <http://www.gnu.org/licenses/>. + +/* +Package hexutil implements hex encoding with 0x prefix. +This encoding is used by the Ethereum RPC API to transport binary data in JSON payloads. + +Encoding Rules + +All hex data must have prefix "0x". + +For byte slices, the hex data must be of even length. An empty byte slice +encodes as "0x". + +Integers are encoded using the least amount of digits (no leading zero digits). Their +encoding may be of uneven length. The number zero encodes as "0x0". +*/ +package hexutil + +import ( + "encoding/hex" + "fmt" + "math/big" + "strconv" +) + +const uintBits = 32 << (uint64(^uint(0)) >> 63) + +// Errors +var ( + ErrEmptyString = &decError{"empty hex string"} + ErrSyntax = &decError{"invalid hex string"} + ErrMissingPrefix = &decError{"hex string without 0x prefix"} + ErrOddLength = &decError{"hex string of odd length"} + ErrEmptyNumber = &decError{"hex string \"0x\""} + ErrLeadingZero = &decError{"hex number with leading zero digits"} + ErrUint64Range = &decError{"hex number > 64 bits"} + ErrUintRange = &decError{fmt.Sprintf("hex number > %d bits", uintBits)} + ErrBig256Range = &decError{"hex number > 256 bits"} +) + +type decError struct{ msg string } + +func (err decError) Error() string { return err.msg } + +// Decode decodes a hex string with 0x prefix. +func Decode(input string) ([]byte, error) { + if len(input) == 0 { + return nil, ErrEmptyString + } + if !has0xPrefix(input) { + return nil, ErrMissingPrefix + } + b, err := hex.DecodeString(input[2:]) + if err != nil { + err = mapError(err) + } + return b, err +} + +// MustDecode decodes a hex string with 0x prefix. It panics for invalid input. +func MustDecode(input string) []byte { + dec, err := Decode(input) + if err != nil { + panic(err) + } + return dec +} + +// Encode encodes b as a hex string with 0x prefix. +func Encode(b []byte) string { + enc := make([]byte, len(b)*2+2) + copy(enc, "0x") + hex.Encode(enc[2:], b) + return string(enc) +} + +// DecodeUint64 decodes a hex string with 0x prefix as a quantity. +func DecodeUint64(input string) (uint64, error) { + raw, err := checkNumber(input) + if err != nil { + return 0, err + } + dec, err := strconv.ParseUint(raw, 16, 64) + if err != nil { + err = mapError(err) + } + return dec, err +} + +// MustDecodeUint64 decodes a hex string with 0x prefix as a quantity. +// It panics for invalid input. +func MustDecodeUint64(input string) uint64 { + dec, err := DecodeUint64(input) + if err != nil { + panic(err) + } + return dec +} + +// EncodeUint64 encodes i as a hex string with 0x prefix. +func EncodeUint64(i uint64) string { + enc := make([]byte, 2, 10) + copy(enc, "0x") + return string(strconv.AppendUint(enc, i, 16)) +} + +var bigWordNibbles int + +func init() { + // This is a weird way to compute the number of nibbles required for big.Word. + // The usual way would be to use constant arithmetic but go vet can't handle that. + b, _ := new(big.Int).SetString("FFFFFFFFFF", 16) + switch len(b.Bits()) { + case 1: + bigWordNibbles = 16 + case 2: + bigWordNibbles = 8 + default: + panic("weird big.Word size") + } +} + +// DecodeBig decodes a hex string with 0x prefix as a quantity. +// Numbers larger than 256 bits are not accepted. +func DecodeBig(input string) (*big.Int, error) { + raw, err := checkNumber(input) + if err != nil { + return nil, err + } + if len(raw) > 64 { + return nil, ErrBig256Range + } + words := make([]big.Word, len(raw)/bigWordNibbles+1) + end := len(raw) + for i := range words { + start := end - bigWordNibbles + if start < 0 { + start = 0 + } + for ri := start; ri < end; ri++ { + nib := decodeNibble(raw[ri]) + if nib == badNibble { + return nil, ErrSyntax + } + words[i] *= 16 + words[i] += big.Word(nib) + } + end = start + } + dec := new(big.Int).SetBits(words) + return dec, nil +} + +// MustDecodeBig decodes a hex string with 0x prefix as a quantity. +// It panics for invalid input. +func MustDecodeBig(input string) *big.Int { + dec, err := DecodeBig(input) + if err != nil { + panic(err) + } + return dec +} + +// EncodeBig encodes bigint as a hex string with 0x prefix. +// The sign of the integer is ignored. +func EncodeBig(bigint *big.Int) string { + nbits := bigint.BitLen() + if nbits == 0 { + return "0x0" + } + return fmt.Sprintf("%#x", bigint) +} + +func has0xPrefix(input string) bool { + return len(input) >= 2 && input[0] == '0' && (input[1] == 'x' || input[1] == 'X') +} + +func checkNumber(input string) (raw string, err error) { + if len(input) == 0 { + return "", ErrEmptyString + } + if !has0xPrefix(input) { + return "", ErrMissingPrefix + } + input = input[2:] + if len(input) == 0 { + return "", ErrEmptyNumber + } + if len(input) > 1 && input[0] == '0' { + return "", ErrLeadingZero + } + return input, nil +} + +const badNibble = ^uint64(0) + +func decodeNibble(in byte) uint64 { + switch { + case in >= '0' && in <= '9': + return uint64(in - '0') + case in >= 'A' && in <= 'F': + return uint64(in - 'A' + 10) + case in >= 'a' && in <= 'f': + return uint64(in - 'a' + 10) + default: + return badNibble + } +} + +func mapError(err error) error { + if err, ok := err.(*strconv.NumError); ok { + switch err.Err { + case strconv.ErrRange: + return ErrUint64Range + case strconv.ErrSyntax: + return ErrSyntax + } + } + if _, ok := err.(hex.InvalidByteError); ok { + return ErrSyntax + } + if err == hex.ErrLength { + return ErrOddLength + } + return err +} diff --git a/vendor/github.com/ethereum/go-ethereum/common/hexutil/json.go b/vendor/github.com/ethereum/go-ethereum/common/hexutil/json.go new file mode 100644 index 000000000..777b08eca --- /dev/null +++ b/vendor/github.com/ethereum/go-ethereum/common/hexutil/json.go @@ -0,0 +1,376 @@ +// Copyright 2016 The go-ethereum Authors +// This file is part of the go-ethereum library. +// +// The go-ethereum 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 go-ethereum 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 go-ethereum library. If not, see <http://www.gnu.org/licenses/>. + +package hexutil + +import ( + "encoding/hex" + "encoding/json" + "fmt" + "math/big" + "reflect" + "strconv" +) + +var ( + bytesT = reflect.TypeOf(Bytes(nil)) + bigT = reflect.TypeOf((*Big)(nil)) + uintT = reflect.TypeOf(Uint(0)) + uint64T = reflect.TypeOf(Uint64(0)) +) + +// Bytes marshals/unmarshals as a JSON string with 0x prefix. +// The empty slice marshals as "0x". +type Bytes []byte + +// MarshalText implements encoding.TextMarshaler +func (b Bytes) MarshalText() ([]byte, error) { + result := make([]byte, len(b)*2+2) + copy(result, `0x`) + hex.Encode(result[2:], b) + return result, nil +} + +// UnmarshalJSON implements json.Unmarshaler. +func (b *Bytes) UnmarshalJSON(input []byte) error { + if !isString(input) { + return errNonString(bytesT) + } + return wrapTypeError(b.UnmarshalText(input[1:len(input)-1]), bytesT) +} + +// UnmarshalText implements encoding.TextUnmarshaler. +func (b *Bytes) UnmarshalText(input []byte) error { + raw, err := checkText(input, true) + if err != nil { + return err + } + dec := make([]byte, len(raw)/2) + if _, err = hex.Decode(dec, raw); err != nil { + err = mapError(err) + } else { + *b = dec + } + return err +} + +// String returns the hex encoding of b. +func (b Bytes) String() string { + return Encode(b) +} + +// ImplementsGraphQLType returns true if Bytes implements the specified GraphQL type. +func (b Bytes) ImplementsGraphQLType(name string) bool { return name == "Bytes" } + +// UnmarshalGraphQL unmarshals the provided GraphQL query data. +func (b *Bytes) UnmarshalGraphQL(input interface{}) error { + var err error + switch input := input.(type) { + case string: + data, err := Decode(input) + if err != nil { + return err + } + *b = data + default: + err = fmt.Errorf("Unexpected type for Bytes: %v", input) + } + return err +} + +// UnmarshalFixedJSON decodes the input as a string with 0x prefix. The length of out +// determines the required input length. This function is commonly used to implement the +// UnmarshalJSON method for fixed-size types. +func UnmarshalFixedJSON(typ reflect.Type, input, out []byte) error { + if !isString(input) { + return errNonString(typ) + } + return wrapTypeError(UnmarshalFixedText(typ.String(), input[1:len(input)-1], out), typ) +} + +// UnmarshalFixedText decodes the input as a string with 0x prefix. The length of out +// determines the required input length. This function is commonly used to implement the +// UnmarshalText method for fixed-size types. +func UnmarshalFixedText(typname string, input, out []byte) error { + raw, err := checkText(input, true) + if err != nil { + return err + } + if len(raw)/2 != len(out) { + return fmt.Errorf("hex string has length %d, want %d for %s", len(raw), len(out)*2, typname) + } + // Pre-verify syntax before modifying out. + for _, b := range raw { + if decodeNibble(b) == badNibble { + return ErrSyntax + } + } + hex.Decode(out, raw) + return nil +} + +// UnmarshalFixedUnprefixedText decodes the input as a string with optional 0x prefix. The +// length of out determines the required input length. This function is commonly used to +// implement the UnmarshalText method for fixed-size types. +func UnmarshalFixedUnprefixedText(typname string, input, out []byte) error { + raw, err := checkText(input, false) + if err != nil { + return err + } + if len(raw)/2 != len(out) { + return fmt.Errorf("hex string has length %d, want %d for %s", len(raw), len(out)*2, typname) + } + // Pre-verify syntax before modifying out. + for _, b := range raw { + if decodeNibble(b) == badNibble { + return ErrSyntax + } + } + hex.Decode(out, raw) + return nil +} + +// Big marshals/unmarshals as a JSON string with 0x prefix. +// The zero value marshals as "0x0". +// +// Negative integers are not supported at this time. Attempting to marshal them will +// return an error. Values larger than 256bits are rejected by Unmarshal but will be +// marshaled without error. +type Big big.Int + +// MarshalText implements encoding.TextMarshaler +func (b Big) MarshalText() ([]byte, error) { + return []byte(EncodeBig((*big.Int)(&b))), nil +} + +// UnmarshalJSON implements json.Unmarshaler. +func (b *Big) UnmarshalJSON(input []byte) error { + if !isString(input) { + return errNonString(bigT) + } + return wrapTypeError(b.UnmarshalText(input[1:len(input)-1]), bigT) +} + +// UnmarshalText implements encoding.TextUnmarshaler +func (b *Big) UnmarshalText(input []byte) error { + raw, err := checkNumberText(input) + if err != nil { + return err + } + if len(raw) > 64 { + return ErrBig256Range + } + words := make([]big.Word, len(raw)/bigWordNibbles+1) + end := len(raw) + for i := range words { + start := end - bigWordNibbles + if start < 0 { + start = 0 + } + for ri := start; ri < end; ri++ { + nib := decodeNibble(raw[ri]) + if nib == badNibble { + return ErrSyntax + } + words[i] *= 16 + words[i] += big.Word(nib) + } + end = start + } + var dec big.Int + dec.SetBits(words) + *b = (Big)(dec) + return nil +} + +// ToInt converts b to a big.Int. +func (b *Big) ToInt() *big.Int { + return (*big.Int)(b) +} + +// String returns the hex encoding of b. +func (b *Big) String() string { + return EncodeBig(b.ToInt()) +} + +// ImplementsGraphQLType returns true if Big implements the provided GraphQL type. +func (b Big) ImplementsGraphQLType(name string) bool { return name == "BigInt" } + +// UnmarshalGraphQL unmarshals the provided GraphQL query data. +func (b *Big) UnmarshalGraphQL(input interface{}) error { + var err error + switch input := input.(type) { + case string: + return b.UnmarshalText([]byte(input)) + case int32: + var num big.Int + num.SetInt64(int64(input)) + *b = Big(num) + default: + err = fmt.Errorf("Unexpected type for BigInt: %v", input) + } + return err +} + +// Uint64 marshals/unmarshals as a JSON string with 0x prefix. +// The zero value marshals as "0x0". +type Uint64 uint64 + +// MarshalText implements encoding.TextMarshaler. +func (b Uint64) MarshalText() ([]byte, error) { + buf := make([]byte, 2, 10) + copy(buf, `0x`) + buf = strconv.AppendUint(buf, uint64(b), 16) + return buf, nil +} + +// UnmarshalJSON implements json.Unmarshaler. +func (b *Uint64) UnmarshalJSON(input []byte) error { + if !isString(input) { + return errNonString(uint64T) + } + return wrapTypeError(b.UnmarshalText(input[1:len(input)-1]), uint64T) +} + +// UnmarshalText implements encoding.TextUnmarshaler +func (b *Uint64) UnmarshalText(input []byte) error { + raw, err := checkNumberText(input) + if err != nil { + return err + } + if len(raw) > 16 { + return ErrUint64Range + } + var dec uint64 + for _, byte := range raw { + nib := decodeNibble(byte) + if nib == badNibble { + return ErrSyntax + } + dec *= 16 + dec += nib + } + *b = Uint64(dec) + return nil +} + +// String returns the hex encoding of b. +func (b Uint64) String() string { + return EncodeUint64(uint64(b)) +} + +// ImplementsGraphQLType returns true if Uint64 implements the provided GraphQL type. +func (b Uint64) ImplementsGraphQLType(name string) bool { return name == "Long" } + +// UnmarshalGraphQL unmarshals the provided GraphQL query data. +func (b *Uint64) UnmarshalGraphQL(input interface{}) error { + var err error + switch input := input.(type) { + case string: + return b.UnmarshalText([]byte(input)) + case int32: + *b = Uint64(input) + default: + err = fmt.Errorf("Unexpected type for Long: %v", input) + } + return err +} + +// Uint marshals/unmarshals as a JSON string with 0x prefix. +// The zero value marshals as "0x0". +type Uint uint + +// MarshalText implements encoding.TextMarshaler. +func (b Uint) MarshalText() ([]byte, error) { + return Uint64(b).MarshalText() +} + +// UnmarshalJSON implements json.Unmarshaler. +func (b *Uint) UnmarshalJSON(input []byte) error { + if !isString(input) { + return errNonString(uintT) + } + return wrapTypeError(b.UnmarshalText(input[1:len(input)-1]), uintT) +} + +// UnmarshalText implements encoding.TextUnmarshaler. +func (b *Uint) UnmarshalText(input []byte) error { + var u64 Uint64 + err := u64.UnmarshalText(input) + if u64 > Uint64(^uint(0)) || err == ErrUint64Range { + return ErrUintRange + } else if err != nil { + return err + } + *b = Uint(u64) + return nil +} + +// String returns the hex encoding of b. +func (b Uint) String() string { + return EncodeUint64(uint64(b)) +} + +func isString(input []byte) bool { + return len(input) >= 2 && input[0] == '"' && input[len(input)-1] == '"' +} + +func bytesHave0xPrefix(input []byte) bool { + return len(input) >= 2 && input[0] == '0' && (input[1] == 'x' || input[1] == 'X') +} + +func checkText(input []byte, wantPrefix bool) ([]byte, error) { + if len(input) == 0 { + return nil, nil // empty strings are allowed + } + if bytesHave0xPrefix(input) { + input = input[2:] + } else if wantPrefix { + return nil, ErrMissingPrefix + } + if len(input)%2 != 0 { + return nil, ErrOddLength + } + return input, nil +} + +func checkNumberText(input []byte) (raw []byte, err error) { + if len(input) == 0 { + return nil, nil // empty strings are allowed + } + if !bytesHave0xPrefix(input) { + return nil, ErrMissingPrefix + } + input = input[2:] + if len(input) == 0 { + return nil, ErrEmptyNumber + } + if len(input) > 1 && input[0] == '0' { + return nil, ErrLeadingZero + } + return input, nil +} + +func wrapTypeError(err error, typ reflect.Type) error { + if _, ok := err.(*decError); ok { + return &json.UnmarshalTypeError{Value: err.Error(), Type: typ} + } + return err +} + +func errNonString(typ reflect.Type) error { + return &json.UnmarshalTypeError{Value: "non-string", Type: typ} +} diff --git a/vendor/github.com/ethereum/go-ethereum/common/math/big.go b/vendor/github.com/ethereum/go-ethereum/common/math/big.go new file mode 100644 index 000000000..d31c59af1 --- /dev/null +++ b/vendor/github.com/ethereum/go-ethereum/common/math/big.go @@ -0,0 +1,219 @@ +// Copyright 2017 The go-ethereum Authors +// This file is part of the go-ethereum library. +// +// The go-ethereum 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 go-ethereum 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 go-ethereum library. If not, see <http://www.gnu.org/licenses/>. + +// Package math provides integer math utilities. +package math + +import ( + "fmt" + "math/big" +) + +// Various big integer limit values. +var ( + tt255 = BigPow(2, 255) + tt256 = BigPow(2, 256) + tt256m1 = new(big.Int).Sub(tt256, big.NewInt(1)) + tt63 = BigPow(2, 63) + MaxBig256 = new(big.Int).Set(tt256m1) + MaxBig63 = new(big.Int).Sub(tt63, big.NewInt(1)) +) + +const ( + // number of bits in a big.Word + wordBits = 32 << (uint64(^big.Word(0)) >> 63) + // number of bytes in a big.Word + wordBytes = wordBits / 8 +) + +// HexOrDecimal256 marshals big.Int as hex or decimal. +type HexOrDecimal256 big.Int + +// NewHexOrDecimal256 creates a new HexOrDecimal256 +func NewHexOrDecimal256(x int64) *HexOrDecimal256 { + b := big.NewInt(x) + h := HexOrDecimal256(*b) + return &h +} + +// UnmarshalText implements encoding.TextUnmarshaler. +func (i *HexOrDecimal256) UnmarshalText(input []byte) error { + bigint, ok := ParseBig256(string(input)) + if !ok { + return fmt.Errorf("invalid hex or decimal integer %q", input) + } + *i = HexOrDecimal256(*bigint) + return nil +} + +// MarshalText implements encoding.TextMarshaler. +func (i *HexOrDecimal256) MarshalText() ([]byte, error) { + if i == nil { + return []byte("0x0"), nil + } + return []byte(fmt.Sprintf("%#x", (*big.Int)(i))), nil +} + +// ParseBig256 parses s as a 256 bit integer in decimal or hexadecimal syntax. +// Leading zeros are accepted. The empty string parses as zero. +func ParseBig256(s string) (*big.Int, bool) { + if s == "" { + return new(big.Int), true + } + var bigint *big.Int + var ok bool + if len(s) >= 2 && (s[:2] == "0x" || s[:2] == "0X") { + bigint, ok = new(big.Int).SetString(s[2:], 16) + } else { + bigint, ok = new(big.Int).SetString(s, 10) + } + if ok && bigint.BitLen() > 256 { + bigint, ok = nil, false + } + return bigint, ok +} + +// MustParseBig256 parses s as a 256 bit big integer and panics if the string is invalid. +func MustParseBig256(s string) *big.Int { + v, ok := ParseBig256(s) + if !ok { + panic("invalid 256 bit integer: " + s) + } + return v +} + +// BigPow returns a ** b as a big integer. +func BigPow(a, b int64) *big.Int { + r := big.NewInt(a) + return r.Exp(r, big.NewInt(b), nil) +} + +// BigMax returns the larger of x or y. +func BigMax(x, y *big.Int) *big.Int { + if x.Cmp(y) < 0 { + return y + } + return x +} + +// BigMin returns the smaller of x or y. +func BigMin(x, y *big.Int) *big.Int { + if x.Cmp(y) > 0 { + return y + } + return x +} + +// FirstBitSet returns the index of the first 1 bit in v, counting from LSB. +func FirstBitSet(v *big.Int) int { + for i := 0; i < v.BitLen(); i++ { + if v.Bit(i) > 0 { + return i + } + } + return v.BitLen() +} + +// PaddedBigBytes encodes a big integer as a big-endian byte slice. The length +// of the slice is at least n bytes. +func PaddedBigBytes(bigint *big.Int, n int) []byte { + if bigint.BitLen()/8 >= n { + return bigint.Bytes() + } + ret := make([]byte, n) + ReadBits(bigint, ret) + return ret +} + +// bigEndianByteAt returns the byte at position n, +// in Big-Endian encoding +// So n==0 returns the least significant byte +func bigEndianByteAt(bigint *big.Int, n int) byte { + words := bigint.Bits() + // Check word-bucket the byte will reside in + i := n / wordBytes + if i >= len(words) { + return byte(0) + } + word := words[i] + // Offset of the byte + shift := 8 * uint(n%wordBytes) + + return byte(word >> shift) +} + +// Byte returns the byte at position n, +// with the supplied padlength in Little-Endian encoding. +// n==0 returns the MSB +// Example: bigint '5', padlength 32, n=31 => 5 +func Byte(bigint *big.Int, padlength, n int) byte { + if n >= padlength { + return byte(0) + } + return bigEndianByteAt(bigint, padlength-1-n) +} + +// ReadBits encodes the absolute value of bigint as big-endian bytes. Callers must ensure +// that buf has enough space. If buf is too short the result will be incomplete. +func ReadBits(bigint *big.Int, buf []byte) { + i := len(buf) + for _, d := range bigint.Bits() { + for j := 0; j < wordBytes && i > 0; j++ { + i-- + buf[i] = byte(d) + d >>= 8 + } + } +} + +// U256 encodes as a 256 bit two's complement number. This operation is destructive. +func U256(x *big.Int) *big.Int { + return x.And(x, tt256m1) +} + +// S256 interprets x as a two's complement number. +// x must not exceed 256 bits (the result is undefined if it does) and is not modified. +// +// S256(0) = 0 +// S256(1) = 1 +// S256(2**255) = -2**255 +// S256(2**256-1) = -1 +func S256(x *big.Int) *big.Int { + if x.Cmp(tt255) < 0 { + return x + } + return new(big.Int).Sub(x, tt256) +} + +// Exp implements exponentiation by squaring. +// Exp returns a newly-allocated big integer and does not change +// base or exponent. The result is truncated to 256 bits. +// +// Courtesy @karalabe and @chfast +func Exp(base, exponent *big.Int) *big.Int { + result := big.NewInt(1) + + for _, word := range exponent.Bits() { + for i := 0; i < wordBits; i++ { + if word&1 == 1 { + U256(result.Mul(result, base)) + } + U256(base.Mul(base, base)) + word >>= 1 + } + } + return result +} diff --git a/vendor/github.com/ethereum/go-ethereum/common/math/integer.go b/vendor/github.com/ethereum/go-ethereum/common/math/integer.go new file mode 100644 index 000000000..93b1d036d --- /dev/null +++ b/vendor/github.com/ethereum/go-ethereum/common/math/integer.go @@ -0,0 +1,99 @@ +// Copyright 2017 The go-ethereum Authors +// This file is part of the go-ethereum library. +// +// The go-ethereum 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 go-ethereum 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 go-ethereum library. If not, see <http://www.gnu.org/licenses/>. + +package math + +import ( + "fmt" + "strconv" +) + +// Integer limit values. +const ( + MaxInt8 = 1<<7 - 1 + MinInt8 = -1 << 7 + MaxInt16 = 1<<15 - 1 + MinInt16 = -1 << 15 + MaxInt32 = 1<<31 - 1 + MinInt32 = -1 << 31 + MaxInt64 = 1<<63 - 1 + MinInt64 = -1 << 63 + MaxUint8 = 1<<8 - 1 + MaxUint16 = 1<<16 - 1 + MaxUint32 = 1<<32 - 1 + MaxUint64 = 1<<64 - 1 +) + +// HexOrDecimal64 marshals uint64 as hex or decimal. +type HexOrDecimal64 uint64 + +// UnmarshalText implements encoding.TextUnmarshaler. +func (i *HexOrDecimal64) UnmarshalText(input []byte) error { + int, ok := ParseUint64(string(input)) + if !ok { + return fmt.Errorf("invalid hex or decimal integer %q", input) + } + *i = HexOrDecimal64(int) + return nil +} + +// MarshalText implements encoding.TextMarshaler. +func (i HexOrDecimal64) MarshalText() ([]byte, error) { + return []byte(fmt.Sprintf("%#x", uint64(i))), nil +} + +// ParseUint64 parses s as an integer in decimal or hexadecimal syntax. +// Leading zeros are accepted. The empty string parses as zero. +func ParseUint64(s string) (uint64, bool) { + if s == "" { + return 0, true + } + if len(s) >= 2 && (s[:2] == "0x" || s[:2] == "0X") { + v, err := strconv.ParseUint(s[2:], 16, 64) + return v, err == nil + } + v, err := strconv.ParseUint(s, 10, 64) + return v, err == nil +} + +// MustParseUint64 parses s as an integer and panics if the string is invalid. +func MustParseUint64(s string) uint64 { + v, ok := ParseUint64(s) + if !ok { + panic("invalid unsigned 64 bit integer: " + s) + } + return v +} + +// NOTE: The following methods need to be optimised using either bit checking or asm + +// SafeSub returns subtraction result and whether overflow occurred. +func SafeSub(x, y uint64) (uint64, bool) { + return x - y, x < y +} + +// SafeAdd returns the result and whether overflow occurred. +func SafeAdd(x, y uint64) (uint64, bool) { + return x + y, y > MaxUint64-x +} + +// SafeMul returns multiplication result and whether overflow occurred. +func SafeMul(x, y uint64) (uint64, bool) { + if x == 0 || y == 0 { + return 0, false + } + return x * y, y > MaxUint64/x +} diff --git a/vendor/github.com/ethereum/go-ethereum/common/path.go b/vendor/github.com/ethereum/go-ethereum/common/path.go new file mode 100644 index 000000000..69820cfe5 --- /dev/null +++ b/vendor/github.com/ethereum/go-ethereum/common/path.go @@ -0,0 +1,49 @@ +// Copyright 2014 The go-ethereum Authors +// This file is part of the go-ethereum library. +// +// The go-ethereum 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 go-ethereum 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 go-ethereum library. If not, see <http://www.gnu.org/licenses/>. + +package common + +import ( + "fmt" + "os" + "path/filepath" + "runtime" +) + +// MakeName creates a node name that follows the ethereum convention +// for such names. It adds the operation system name and Go runtime version +// the name. +func MakeName(name, version string) string { + return fmt.Sprintf("%s/v%s/%s/%s", name, version, runtime.GOOS, runtime.Version()) +} + +// FileExist checks if a file exists at filePath. +func FileExist(filePath string) bool { + _, err := os.Stat(filePath) + if err != nil && os.IsNotExist(err) { + return false + } + + return true +} + +// AbsolutePath returns datadir + filename, or filename if it is absolute. +func AbsolutePath(datadir string, filename string) string { + if filepath.IsAbs(filename) { + return filename + } + return filepath.Join(datadir, filename) +} diff --git a/vendor/github.com/ethereum/go-ethereum/common/size.go b/vendor/github.com/ethereum/go-ethereum/common/size.go new file mode 100644 index 000000000..097b6304a --- /dev/null +++ b/vendor/github.com/ethereum/go-ethereum/common/size.go @@ -0,0 +1,56 @@ +// Copyright 2014 The go-ethereum Authors +// This file is part of the go-ethereum library. +// +// The go-ethereum 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 go-ethereum 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 go-ethereum library. If not, see <http://www.gnu.org/licenses/>. + +package common + +import ( + "fmt" +) + +// StorageSize is a wrapper around a float value that supports user friendly +// formatting. +type StorageSize float64 + +// String implements the stringer interface. +func (s StorageSize) String() string { + if s > 1099511627776 { + return fmt.Sprintf("%.2f TiB", s/1099511627776) + } else if s > 1073741824 { + return fmt.Sprintf("%.2f GiB", s/1073741824) + } else if s > 1048576 { + return fmt.Sprintf("%.2f MiB", s/1048576) + } else if s > 1024 { + return fmt.Sprintf("%.2f KiB", s/1024) + } else { + return fmt.Sprintf("%.2f B", s) + } +} + +// TerminalString implements log.TerminalStringer, formatting a string for console +// output during logging. +func (s StorageSize) TerminalString() string { + if s > 1099511627776 { + return fmt.Sprintf("%.2fTiB", s/1099511627776) + } else if s > 1073741824 { + return fmt.Sprintf("%.2fGiB", s/1073741824) + } else if s > 1048576 { + return fmt.Sprintf("%.2fMiB", s/1048576) + } else if s > 1024 { + return fmt.Sprintf("%.2fKiB", s/1024) + } else { + return fmt.Sprintf("%.2fB", s) + } +} diff --git a/vendor/github.com/ethereum/go-ethereum/common/test_utils.go b/vendor/github.com/ethereum/go-ethereum/common/test_utils.go new file mode 100644 index 000000000..a848642f7 --- /dev/null +++ b/vendor/github.com/ethereum/go-ethereum/common/test_utils.go @@ -0,0 +1,53 @@ +// Copyright 2015 The go-ethereum Authors +// This file is part of the go-ethereum library. +// +// The go-ethereum 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 go-ethereum 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 go-ethereum library. If not, see <http://www.gnu.org/licenses/>. + +package common + +import ( + "encoding/json" + "fmt" + "io/ioutil" +) + +// LoadJSON reads the given file and unmarshals its content. +func LoadJSON(file string, val interface{}) error { + content, err := ioutil.ReadFile(file) + if err != nil { + return err + } + if err := json.Unmarshal(content, val); err != nil { + if syntaxerr, ok := err.(*json.SyntaxError); ok { + line := findLine(content, syntaxerr.Offset) + return fmt.Errorf("JSON syntax error at %v:%v: %v", file, line, err) + } + return fmt.Errorf("JSON unmarshal error in %v: %v", file, err) + } + return nil +} + +// findLine returns the line number for the given offset into data. +func findLine(data []byte, offset int64) (line int) { + line = 1 + for i, r := range string(data) { + if int64(i) >= offset { + return + } + if r == '\n' { + line++ + } + } + return +} diff --git a/vendor/github.com/ethereum/go-ethereum/common/types.go b/vendor/github.com/ethereum/go-ethereum/common/types.go new file mode 100644 index 000000000..98c83edd4 --- /dev/null +++ b/vendor/github.com/ethereum/go-ethereum/common/types.go @@ -0,0 +1,369 @@ +// Copyright 2015 The go-ethereum Authors +// This file is part of the go-ethereum library. +// +// The go-ethereum 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 go-ethereum 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 go-ethereum library. If not, see <http://www.gnu.org/licenses/>. + +package common + +import ( + "database/sql/driver" + "encoding/hex" + "encoding/json" + "fmt" + "math/big" + "math/rand" + "reflect" + "strings" + + "github.com/ethereum/go-ethereum/common/hexutil" + "golang.org/x/crypto/sha3" +) + +// Lengths of hashes and addresses in bytes. +const ( + // HashLength is the expected length of the hash + HashLength = 32 + // AddressLength is the expected length of the address + AddressLength = 20 +) + +var ( + hashT = reflect.TypeOf(Hash{}) + addressT = reflect.TypeOf(Address{}) +) + +// Hash represents the 32 byte Keccak256 hash of arbitrary data. +type Hash [HashLength]byte + +// BytesToHash sets b to hash. +// If b is larger than len(h), b will be cropped from the left. +func BytesToHash(b []byte) Hash { + var h Hash + h.SetBytes(b) + return h +} + +// BigToHash sets byte representation of b to hash. +// If b is larger than len(h), b will be cropped from the left. +func BigToHash(b *big.Int) Hash { return BytesToHash(b.Bytes()) } + +// HexToHash sets byte representation of s to hash. +// If b is larger than len(h), b will be cropped from the left. +func HexToHash(s string) Hash { return BytesToHash(FromHex(s)) } + +// Bytes gets the byte representation of the underlying hash. +func (h Hash) Bytes() []byte { return h[:] } + +// Big converts a hash to a big integer. +func (h Hash) Big() *big.Int { return new(big.Int).SetBytes(h[:]) } + +// Hex converts a hash to a hex string. +func (h Hash) Hex() string { return hexutil.Encode(h[:]) } + +// TerminalString implements log.TerminalStringer, formatting a string for console +// output during logging. +func (h Hash) TerminalString() string { + return fmt.Sprintf("%x…%x", h[:3], h[29:]) +} + +// String implements the stringer interface and is used also by the logger when +// doing full logging into a file. +func (h Hash) String() string { + return h.Hex() +} + +// Format implements fmt.Formatter, forcing the byte slice to be formatted as is, +// without going through the stringer interface used for logging. +func (h Hash) Format(s fmt.State, c rune) { + fmt.Fprintf(s, "%"+string(c), h[:]) +} + +// UnmarshalText parses a hash in hex syntax. +func (h *Hash) UnmarshalText(input []byte) error { + return hexutil.UnmarshalFixedText("Hash", input, h[:]) +} + +// UnmarshalJSON parses a hash in hex syntax. +func (h *Hash) UnmarshalJSON(input []byte) error { + return hexutil.UnmarshalFixedJSON(hashT, input, h[:]) +} + +// MarshalText returns the hex representation of h. +func (h Hash) MarshalText() ([]byte, error) { + return hexutil.Bytes(h[:]).MarshalText() +} + +// SetBytes sets the hash to the value of b. +// If b is larger than len(h), b will be cropped from the left. +func (h *Hash) SetBytes(b []byte) { + if len(b) > len(h) { + b = b[len(b)-HashLength:] + } + + copy(h[HashLength-len(b):], b) +} + +// Generate implements testing/quick.Generator. +func (h Hash) Generate(rand *rand.Rand, size int) reflect.Value { + m := rand.Intn(len(h)) + for i := len(h) - 1; i > m; i-- { + h[i] = byte(rand.Uint32()) + } + return reflect.ValueOf(h) +} + +// Scan implements Scanner for database/sql. +func (h *Hash) Scan(src interface{}) error { + srcB, ok := src.([]byte) + if !ok { + return fmt.Errorf("can't scan %T into Hash", src) + } + if len(srcB) != HashLength { + return fmt.Errorf("can't scan []byte of len %d into Hash, want %d", len(srcB), HashLength) + } + copy(h[:], srcB) + return nil +} + +// Value implements valuer for database/sql. +func (h Hash) Value() (driver.Value, error) { + return h[:], nil +} + +// ImplementsGraphQLType returns true if Hash implements the specified GraphQL type. +func (_ Hash) ImplementsGraphQLType(name string) bool { return name == "Bytes32" } + +// UnmarshalGraphQL unmarshals the provided GraphQL query data. +func (h *Hash) UnmarshalGraphQL(input interface{}) error { + var err error + switch input := input.(type) { + case string: + *h = HexToHash(input) + default: + err = fmt.Errorf("Unexpected type for Bytes32: %v", input) + } + return err +} + +// UnprefixedHash allows marshaling a Hash without 0x prefix. +type UnprefixedHash Hash + +// UnmarshalText decodes the hash from hex. The 0x prefix is optional. +func (h *UnprefixedHash) UnmarshalText(input []byte) error { + return hexutil.UnmarshalFixedUnprefixedText("UnprefixedHash", input, h[:]) +} + +// MarshalText encodes the hash as hex. +func (h UnprefixedHash) MarshalText() ([]byte, error) { + return []byte(hex.EncodeToString(h[:])), nil +} + +/////////// Address + +// Address represents the 20 byte address of an Ethereum account. +type Address [AddressLength]byte + +// BytesToAddress returns Address with value b. +// If b is larger than len(h), b will be cropped from the left. +func BytesToAddress(b []byte) Address { + var a Address + a.SetBytes(b) + return a +} + +// BigToAddress returns Address with byte values of b. +// If b is larger than len(h), b will be cropped from the left. +func BigToAddress(b *big.Int) Address { return BytesToAddress(b.Bytes()) } + +// HexToAddress returns Address with byte values of s. +// If s is larger than len(h), s will be cropped from the left. +func HexToAddress(s string) Address { return BytesToAddress(FromHex(s)) } + +// IsHexAddress verifies whether a string can represent a valid hex-encoded +// Ethereum address or not. +func IsHexAddress(s string) bool { + if hasHexPrefix(s) { + s = s[2:] + } + return len(s) == 2*AddressLength && isHex(s) +} + +// Bytes gets the string representation of the underlying address. +func (a Address) Bytes() []byte { return a[:] } + +// Hash converts an address to a hash by left-padding it with zeros. +func (a Address) Hash() Hash { return BytesToHash(a[:]) } + +// Hex returns an EIP55-compliant hex string representation of the address. +func (a Address) Hex() string { + unchecksummed := hex.EncodeToString(a[:]) + sha := sha3.NewLegacyKeccak256() + sha.Write([]byte(unchecksummed)) + hash := sha.Sum(nil) + + result := []byte(unchecksummed) + for i := 0; i < len(result); i++ { + hashByte := hash[i/2] + if i%2 == 0 { + hashByte = hashByte >> 4 + } else { + hashByte &= 0xf + } + if result[i] > '9' && hashByte > 7 { + result[i] -= 32 + } + } + return "0x" + string(result) +} + +// String implements fmt.Stringer. +func (a Address) String() string { + return a.Hex() +} + +// Format implements fmt.Formatter, forcing the byte slice to be formatted as is, +// without going through the stringer interface used for logging. +func (a Address) Format(s fmt.State, c rune) { + fmt.Fprintf(s, "%"+string(c), a[:]) +} + +// SetBytes sets the address to the value of b. +// If b is larger than len(a) it will panic. +func (a *Address) SetBytes(b []byte) { + if len(b) > len(a) { + b = b[len(b)-AddressLength:] + } + copy(a[AddressLength-len(b):], b) +} + +// MarshalText returns the hex representation of a. +func (a Address) MarshalText() ([]byte, error) { + return hexutil.Bytes(a[:]).MarshalText() +} + +// UnmarshalText parses a hash in hex syntax. +func (a *Address) UnmarshalText(input []byte) error { + return hexutil.UnmarshalFixedText("Address", input, a[:]) +} + +// UnmarshalJSON parses a hash in hex syntax. +func (a *Address) UnmarshalJSON(input []byte) error { + return hexutil.UnmarshalFixedJSON(addressT, input, a[:]) +} + +// Scan implements Scanner for database/sql. +func (a *Address) Scan(src interface{}) error { + srcB, ok := src.([]byte) + if !ok { + return fmt.Errorf("can't scan %T into Address", src) + } + if len(srcB) != AddressLength { + return fmt.Errorf("can't scan []byte of len %d into Address, want %d", len(srcB), AddressLength) + } + copy(a[:], srcB) + return nil +} + +// Value implements valuer for database/sql. +func (a Address) Value() (driver.Value, error) { + return a[:], nil +} + +// ImplementsGraphQLType returns true if Hash implements the specified GraphQL type. +func (a Address) ImplementsGraphQLType(name string) bool { return name == "Address" } + +// UnmarshalGraphQL unmarshals the provided GraphQL query data. +func (a *Address) UnmarshalGraphQL(input interface{}) error { + var err error + switch input := input.(type) { + case string: + *a = HexToAddress(input) + default: + err = fmt.Errorf("Unexpected type for Address: %v", input) + } + return err +} + +// UnprefixedAddress allows marshaling an Address without 0x prefix. +type UnprefixedAddress Address + +// UnmarshalText decodes the address from hex. The 0x prefix is optional. +func (a *UnprefixedAddress) UnmarshalText(input []byte) error { + return hexutil.UnmarshalFixedUnprefixedText("UnprefixedAddress", input, a[:]) +} + +// MarshalText encodes the address as hex. +func (a UnprefixedAddress) MarshalText() ([]byte, error) { + return []byte(hex.EncodeToString(a[:])), nil +} + +// MixedcaseAddress retains the original string, which may or may not be +// correctly checksummed +type MixedcaseAddress struct { + addr Address + original string +} + +// NewMixedcaseAddress constructor (mainly for testing) +func NewMixedcaseAddress(addr Address) MixedcaseAddress { + return MixedcaseAddress{addr: addr, original: addr.Hex()} +} + +// NewMixedcaseAddressFromString is mainly meant for unit-testing +func NewMixedcaseAddressFromString(hexaddr string) (*MixedcaseAddress, error) { + if !IsHexAddress(hexaddr) { + return nil, fmt.Errorf("Invalid address") + } + a := FromHex(hexaddr) + return &MixedcaseAddress{addr: BytesToAddress(a), original: hexaddr}, nil +} + +// UnmarshalJSON parses MixedcaseAddress +func (ma *MixedcaseAddress) UnmarshalJSON(input []byte) error { + if err := hexutil.UnmarshalFixedJSON(addressT, input, ma.addr[:]); err != nil { + return err + } + return json.Unmarshal(input, &ma.original) +} + +// MarshalJSON marshals the original value +func (ma *MixedcaseAddress) MarshalJSON() ([]byte, error) { + if strings.HasPrefix(ma.original, "0x") || strings.HasPrefix(ma.original, "0X") { + return json.Marshal(fmt.Sprintf("0x%s", ma.original[2:])) + } + return json.Marshal(fmt.Sprintf("0x%s", ma.original)) +} + +// Address returns the address +func (ma *MixedcaseAddress) Address() Address { + return ma.addr +} + +// String implements fmt.Stringer +func (ma *MixedcaseAddress) String() string { + if ma.ValidChecksum() { + return fmt.Sprintf("%s [chksum ok]", ma.original) + } + return fmt.Sprintf("%s [chksum INVALID]", ma.original) +} + +// ValidChecksum returns true if the address has valid checksum +func (ma *MixedcaseAddress) ValidChecksum() bool { + return ma.original == ma.addr.Hex() +} + +// Original returns the mixed-case input string +func (ma *MixedcaseAddress) Original() string { + return ma.original +} diff --git a/vendor/github.com/ethereum/go-ethereum/rlp/decode.go b/vendor/github.com/ethereum/go-ethereum/rlp/decode.go new file mode 100644 index 000000000..4f29f2fb0 --- /dev/null +++ b/vendor/github.com/ethereum/go-ethereum/rlp/decode.go @@ -0,0 +1,1049 @@ +// Copyright 2014 The go-ethereum Authors +// This file is part of the go-ethereum library. +// +// The go-ethereum 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 go-ethereum 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 go-ethereum library. If not, see <http://www.gnu.org/licenses/>. + +package rlp + +import ( + "bufio" + "bytes" + "encoding/binary" + "errors" + "fmt" + "io" + "math/big" + "reflect" + "strings" + "sync" +) + +var ( + // EOL is returned when the end of the current list + // has been reached during streaming. + EOL = errors.New("rlp: end of list") + + // Actual Errors + ErrExpectedString = errors.New("rlp: expected String or Byte") + ErrExpectedList = errors.New("rlp: expected List") + ErrCanonInt = errors.New("rlp: non-canonical integer format") + ErrCanonSize = errors.New("rlp: non-canonical size information") + ErrElemTooLarge = errors.New("rlp: element is larger than containing list") + ErrValueTooLarge = errors.New("rlp: value size exceeds available input length") + ErrMoreThanOneValue = errors.New("rlp: input contains more than one value") + + // internal errors + errNotInList = errors.New("rlp: call of ListEnd outside of any list") + errNotAtEOL = errors.New("rlp: call of ListEnd not positioned at EOL") + errUintOverflow = errors.New("rlp: uint overflow") + errNoPointer = errors.New("rlp: interface given to Decode must be a pointer") + errDecodeIntoNil = errors.New("rlp: pointer given to Decode must not be nil") + + streamPool = sync.Pool{ + New: func() interface{} { return new(Stream) }, + } +) + +// Decoder is implemented by types that require custom RLP +// decoding rules or need to decode into private fields. +// +// The DecodeRLP method should read one value from the given +// Stream. It is not forbidden to read less or more, but it might +// be confusing. +type Decoder interface { + DecodeRLP(*Stream) error +} + +// Decode parses RLP-encoded data from r and stores the result in the +// value pointed to by val. Val must be a non-nil pointer. If r does +// not implement ByteReader, Decode will do its own buffering. +// +// Decode uses the following type-dependent decoding rules: +// +// If the type implements the Decoder interface, decode calls +// DecodeRLP. +// +// To decode into a pointer, Decode will decode into the value pointed +// to. If the pointer is nil, a new value of the pointer's element +// type is allocated. If the pointer is non-nil, the existing value +// will be reused. +// +// To decode into a struct, Decode expects the input to be an RLP +// list. The decoded elements of the list are assigned to each public +// field in the order given by the struct's definition. The input list +// must contain an element for each decoded field. Decode returns an +// error if there are too few or too many elements. +// +// The decoding of struct fields honours certain struct tags, "tail", +// "nil" and "-". +// +// The "-" tag ignores fields. +// +// For an explanation of "tail", see the example. +// +// The "nil" tag applies to pointer-typed fields and changes the decoding +// rules for the field such that input values of size zero decode as a nil +// pointer. This tag can be useful when decoding recursive types. +// +// type StructWithEmptyOK struct { +// Foo *[20]byte `rlp:"nil"` +// } +// +// To decode into a slice, the input must be a list and the resulting +// slice will contain the input elements in order. For byte slices, +// the input must be an RLP string. Array types decode similarly, with +// the additional restriction that the number of input elements (or +// bytes) must match the array's length. +// +// To decode into a Go string, the input must be an RLP string. The +// input bytes are taken as-is and will not necessarily be valid UTF-8. +// +// To decode into an unsigned integer type, the input must also be an RLP +// string. The bytes are interpreted as a big endian representation of +// the integer. If the RLP string is larger than the bit size of the +// type, Decode will return an error. Decode also supports *big.Int. +// There is no size limit for big integers. +// +// To decode into a boolean, the input must contain an unsigned integer +// of value zero (false) or one (true). +// +// To decode into an interface value, Decode stores one of these +// in the value: +// +// []interface{}, for RLP lists +// []byte, for RLP strings +// +// Non-empty interface types are not supported, nor are signed integers, +// floating point numbers, maps, channels and functions. +// +// Note that Decode does not set an input limit for all readers +// and may be vulnerable to panics cause by huge value sizes. If +// you need an input limit, use +// +// NewStream(r, limit).Decode(val) +func Decode(r io.Reader, val interface{}) error { + stream := streamPool.Get().(*Stream) + defer streamPool.Put(stream) + + stream.Reset(r, 0) + return stream.Decode(val) +} + +// DecodeBytes parses RLP data from b into val. +// Please see the documentation of Decode for the decoding rules. +// The input must contain exactly one value and no trailing data. +func DecodeBytes(b []byte, val interface{}) error { + r := bytes.NewReader(b) + + stream := streamPool.Get().(*Stream) + defer streamPool.Put(stream) + + stream.Reset(r, uint64(len(b))) + if err := stream.Decode(val); err != nil { + return err + } + if r.Len() > 0 { + return ErrMoreThanOneValue + } + return nil +} + +type decodeError struct { + msg string + typ reflect.Type + ctx []string +} + +func (err *decodeError) Error() string { + ctx := "" + if len(err.ctx) > 0 { + ctx = ", decoding into " + for i := len(err.ctx) - 1; i >= 0; i-- { + ctx += err.ctx[i] + } + } + return fmt.Sprintf("rlp: %s for %v%s", err.msg, err.typ, ctx) +} + +func wrapStreamError(err error, typ reflect.Type) error { + switch err { + case ErrCanonInt: + return &decodeError{msg: "non-canonical integer (leading zero bytes)", typ: typ} + case ErrCanonSize: + return &decodeError{msg: "non-canonical size information", typ: typ} + case ErrExpectedList: + return &decodeError{msg: "expected input list", typ: typ} + case ErrExpectedString: + return &decodeError{msg: "expected input string or byte", typ: typ} + case errUintOverflow: + return &decodeError{msg: "input string too long", typ: typ} + case errNotAtEOL: + return &decodeError{msg: "input list has too many elements", typ: typ} + } + return err +} + +func addErrorContext(err error, ctx string) error { + if decErr, ok := err.(*decodeError); ok { + decErr.ctx = append(decErr.ctx, ctx) + } + return err +} + +var ( + decoderInterface = reflect.TypeOf(new(Decoder)).Elem() + bigInt = reflect.TypeOf(big.Int{}) +) + +func makeDecoder(typ reflect.Type, tags tags) (dec decoder, err error) { + kind := typ.Kind() + switch { + case typ == rawValueType: + return decodeRawValue, nil + case typ.Implements(decoderInterface): + return decodeDecoder, nil + case kind != reflect.Ptr && reflect.PtrTo(typ).Implements(decoderInterface): + return decodeDecoderNoPtr, nil + case typ.AssignableTo(reflect.PtrTo(bigInt)): + return decodeBigInt, nil + case typ.AssignableTo(bigInt): + return decodeBigIntNoPtr, nil + case isUint(kind): + return decodeUint, nil + case kind == reflect.Bool: + return decodeBool, nil + case kind == reflect.String: + return decodeString, nil + case kind == reflect.Slice || kind == reflect.Array: + return makeListDecoder(typ, tags) + case kind == reflect.Struct: + return makeStructDecoder(typ) + case kind == reflect.Ptr: + if tags.nilOK { + return makeOptionalPtrDecoder(typ) + } + return makePtrDecoder(typ) + case kind == reflect.Interface: + return decodeInterface, nil + default: + return nil, fmt.Errorf("rlp: type %v is not RLP-serializable", typ) + } +} + +func decodeRawValue(s *Stream, val reflect.Value) error { + r, err := s.Raw() + if err != nil { + return err + } + val.SetBytes(r) + return nil +} + +func decodeUint(s *Stream, val reflect.Value) error { + typ := val.Type() + num, err := s.uint(typ.Bits()) + if err != nil { + return wrapStreamError(err, val.Type()) + } + val.SetUint(num) + return nil +} + +func decodeBool(s *Stream, val reflect.Value) error { + b, err := s.Bool() + if err != nil { + return wrapStreamError(err, val.Type()) + } + val.SetBool(b) + return nil +} + +func decodeString(s *Stream, val reflect.Value) error { + b, err := s.Bytes() + if err != nil { + return wrapStreamError(err, val.Type()) + } + val.SetString(string(b)) + return nil +} + +func decodeBigIntNoPtr(s *Stream, val reflect.Value) error { + return decodeBigInt(s, val.Addr()) +} + +func decodeBigInt(s *Stream, val reflect.Value) error { + b, err := s.Bytes() + if err != nil { + return wrapStreamError(err, val.Type()) + } + i := val.Interface().(*big.Int) + if i == nil { + i = new(big.Int) + val.Set(reflect.ValueOf(i)) + } + // Reject leading zero bytes + if len(b) > 0 && b[0] == 0 { + return wrapStreamError(ErrCanonInt, val.Type()) + } + i.SetBytes(b) + return nil +} + +func makeListDecoder(typ reflect.Type, tag tags) (decoder, error) { + etype := typ.Elem() + if etype.Kind() == reflect.Uint8 && !reflect.PtrTo(etype).Implements(decoderInterface) { + if typ.Kind() == reflect.Array { + return decodeByteArray, nil + } + return decodeByteSlice, nil + } + etypeinfo := cachedTypeInfo1(etype, tags{}) + if etypeinfo.decoderErr != nil { + return nil, etypeinfo.decoderErr + } + var dec decoder + switch { + case typ.Kind() == reflect.Array: + dec = func(s *Stream, val reflect.Value) error { + return decodeListArray(s, val, etypeinfo.decoder) + } + case tag.tail: + // A slice with "tail" tag can occur as the last field + // of a struct and is supposed to swallow all remaining + // list elements. The struct decoder already called s.List, + // proceed directly to decoding the elements. + dec = func(s *Stream, val reflect.Value) error { + return decodeSliceElems(s, val, etypeinfo.decoder) + } + default: + dec = func(s *Stream, val reflect.Value) error { + return decodeListSlice(s, val, etypeinfo.decoder) + } + } + return dec, nil +} + +func decodeListSlice(s *Stream, val reflect.Value, elemdec decoder) error { + size, err := s.List() + if err != nil { + return wrapStreamError(err, val.Type()) + } + if size == 0 { + val.Set(reflect.MakeSlice(val.Type(), 0, 0)) + return s.ListEnd() + } + if err := decodeSliceElems(s, val, elemdec); err != nil { + return err + } + return s.ListEnd() +} + +func decodeSliceElems(s *Stream, val reflect.Value, elemdec decoder) error { + i := 0 + for ; ; i++ { + // grow slice if necessary + if i >= val.Cap() { + newcap := val.Cap() + val.Cap()/2 + if newcap < 4 { + newcap = 4 + } + newv := reflect.MakeSlice(val.Type(), val.Len(), newcap) + reflect.Copy(newv, val) + val.Set(newv) + } + if i >= val.Len() { + val.SetLen(i + 1) + } + // decode into element + if err := elemdec(s, val.Index(i)); err == EOL { + break + } else if err != nil { + return addErrorContext(err, fmt.Sprint("[", i, "]")) + } + } + if i < val.Len() { + val.SetLen(i) + } + return nil +} + +func decodeListArray(s *Stream, val reflect.Value, elemdec decoder) error { + if _, err := s.List(); err != nil { + return wrapStreamError(err, val.Type()) + } + vlen := val.Len() + i := 0 + for ; i < vlen; i++ { + if err := elemdec(s, val.Index(i)); err == EOL { + break + } else if err != nil { + return addErrorContext(err, fmt.Sprint("[", i, "]")) + } + } + if i < vlen { + return &decodeError{msg: "input list has too few elements", typ: val.Type()} + } + return wrapStreamError(s.ListEnd(), val.Type()) +} + +func decodeByteSlice(s *Stream, val reflect.Value) error { + b, err := s.Bytes() + if err != nil { + return wrapStreamError(err, val.Type()) + } + val.SetBytes(b) + return nil +} + +func decodeByteArray(s *Stream, val reflect.Value) error { + kind, size, err := s.Kind() + if err != nil { + return err + } + vlen := val.Len() + switch kind { + case Byte: + if vlen == 0 { + return &decodeError{msg: "input string too long", typ: val.Type()} + } + if vlen > 1 { + return &decodeError{msg: "input string too short", typ: val.Type()} + } + bv, _ := s.Uint() + val.Index(0).SetUint(bv) + case String: + if uint64(vlen) < size { + return &decodeError{msg: "input string too long", typ: val.Type()} + } + if uint64(vlen) > size { + return &decodeError{msg: "input string too short", typ: val.Type()} + } + slice := val.Slice(0, vlen).Interface().([]byte) + if err := s.readFull(slice); err != nil { + return err + } + // Reject cases where single byte encoding should have been used. + if size == 1 && slice[0] < 128 { + return wrapStreamError(ErrCanonSize, val.Type()) + } + case List: + return wrapStreamError(ErrExpectedString, val.Type()) + } + return nil +} + +func makeStructDecoder(typ reflect.Type) (decoder, error) { + fields, err := structFields(typ) + if err != nil { + return nil, err + } + dec := func(s *Stream, val reflect.Value) (err error) { + if _, err := s.List(); err != nil { + return wrapStreamError(err, typ) + } + for _, f := range fields { + err := f.info.decoder(s, val.Field(f.index)) + if err == EOL { + return &decodeError{msg: "too few elements", typ: typ} + } else if err != nil { + return addErrorContext(err, "."+typ.Field(f.index).Name) + } + } + return wrapStreamError(s.ListEnd(), typ) + } + return dec, nil +} + +// makePtrDecoder creates a decoder that decodes into +// the pointer's element type. +func makePtrDecoder(typ reflect.Type) (decoder, error) { + etype := typ.Elem() + etypeinfo := cachedTypeInfo1(etype, tags{}) + if etypeinfo.decoderErr != nil { + return nil, etypeinfo.decoderErr + } + dec := func(s *Stream, val reflect.Value) (err error) { + newval := val + if val.IsNil() { + newval = reflect.New(etype) + } + if err = etypeinfo.decoder(s, newval.Elem()); err == nil { + val.Set(newval) + } + return err + } + return dec, nil +} + +// makeOptionalPtrDecoder creates a decoder that decodes empty values +// as nil. Non-empty values are decoded into a value of the element type, +// just like makePtrDecoder does. +// +// This decoder is used for pointer-typed struct fields with struct tag "nil". +func makeOptionalPtrDecoder(typ reflect.Type) (decoder, error) { + etype := typ.Elem() + etypeinfo := cachedTypeInfo1(etype, tags{}) + if etypeinfo.decoderErr != nil { + return nil, etypeinfo.decoderErr + } + dec := func(s *Stream, val reflect.Value) (err error) { + kind, size, err := s.Kind() + if err != nil || size == 0 && kind != Byte { + // rearm s.Kind. This is important because the input + // position must advance to the next value even though + // we don't read anything. + s.kind = -1 + // set the pointer to nil. + val.Set(reflect.Zero(typ)) + return err + } + newval := val + if val.IsNil() { + newval = reflect.New(etype) + } + if err = etypeinfo.decoder(s, newval.Elem()); err == nil { + val.Set(newval) + } + return err + } + return dec, nil +} + +var ifsliceType = reflect.TypeOf([]interface{}{}) + +func decodeInterface(s *Stream, val reflect.Value) error { + if val.Type().NumMethod() != 0 { + return fmt.Errorf("rlp: type %v is not RLP-serializable", val.Type()) + } + kind, _, err := s.Kind() + if err != nil { + return err + } + if kind == List { + slice := reflect.New(ifsliceType).Elem() + if err := decodeListSlice(s, slice, decodeInterface); err != nil { + return err + } + val.Set(slice) + } else { + b, err := s.Bytes() + if err != nil { + return err + } + val.Set(reflect.ValueOf(b)) + } + return nil +} + +// This decoder is used for non-pointer values of types +// that implement the Decoder interface using a pointer receiver. +func decodeDecoderNoPtr(s *Stream, val reflect.Value) error { + return val.Addr().Interface().(Decoder).DecodeRLP(s) +} + +func decodeDecoder(s *Stream, val reflect.Value) error { + // Decoder instances are not handled using the pointer rule if the type + // implements Decoder with pointer receiver (i.e. always) + // because it might handle empty values specially. + // We need to allocate one here in this case, like makePtrDecoder does. + if val.Kind() == reflect.Ptr && val.IsNil() { + val.Set(reflect.New(val.Type().Elem())) + } + return val.Interface().(Decoder).DecodeRLP(s) +} + +// Kind represents the kind of value contained in an RLP stream. +type Kind int + +const ( + Byte Kind = iota + String + List +) + +func (k Kind) String() string { + switch k { + case Byte: + return "Byte" + case String: + return "String" + case List: + return "List" + default: + return fmt.Sprintf("Unknown(%d)", k) + } +} + +// ByteReader must be implemented by any input reader for a Stream. It +// is implemented by e.g. bufio.Reader and bytes.Reader. +type ByteReader interface { + io.Reader + io.ByteReader +} + +// Stream can be used for piecemeal decoding of an input stream. This +// is useful if the input is very large or if the decoding rules for a +// type depend on the input structure. Stream does not keep an +// internal buffer. After decoding a value, the input reader will be +// positioned just before the type information for the next value. +// +// When decoding a list and the input position reaches the declared +// length of the list, all operations will return error EOL. +// The end of the list must be acknowledged using ListEnd to continue +// reading the enclosing list. +// +// Stream is not safe for concurrent use. +type Stream struct { + r ByteReader + + // number of bytes remaining to be read from r. + remaining uint64 + limited bool + + // auxiliary buffer for integer decoding + uintbuf []byte + + kind Kind // kind of value ahead + size uint64 // size of value ahead + byteval byte // value of single byte in type tag + kinderr error // error from last readKind + stack []listpos +} + +type listpos struct{ pos, size uint64 } + +// NewStream creates a new decoding stream reading from r. +// +// If r implements the ByteReader interface, Stream will +// not introduce any buffering. +// +// For non-toplevel values, Stream returns ErrElemTooLarge +// for values that do not fit into the enclosing list. +// +// Stream supports an optional input limit. If a limit is set, the +// size of any toplevel value will be checked against the remaining +// input length. Stream operations that encounter a value exceeding +// the remaining input length will return ErrValueTooLarge. The limit +// can be set by passing a non-zero value for inputLimit. +// +// If r is a bytes.Reader or strings.Reader, the input limit is set to +// the length of r's underlying data unless an explicit limit is +// provided. +func NewStream(r io.Reader, inputLimit uint64) *Stream { + s := new(Stream) + s.Reset(r, inputLimit) + return s +} + +// NewListStream creates a new stream that pretends to be positioned +// at an encoded list of the given length. +func NewListStream(r io.Reader, len uint64) *Stream { + s := new(Stream) + s.Reset(r, len) + s.kind = List + s.size = len + return s +} + +// Bytes reads an RLP string and returns its contents as a byte slice. +// If the input does not contain an RLP string, the returned +// error will be ErrExpectedString. +func (s *Stream) Bytes() ([]byte, error) { + kind, size, err := s.Kind() + if err != nil { + return nil, err + } + switch kind { + case Byte: + s.kind = -1 // rearm Kind + return []byte{s.byteval}, nil + case String: + b := make([]byte, size) + if err = s.readFull(b); err != nil { + return nil, err + } + if size == 1 && b[0] < 128 { + return nil, ErrCanonSize + } + return b, nil + default: + return nil, ErrExpectedString + } +} + +// Raw reads a raw encoded value including RLP type information. +func (s *Stream) Raw() ([]byte, error) { + kind, size, err := s.Kind() + if err != nil { + return nil, err + } + if kind == Byte { + s.kind = -1 // rearm Kind + return []byte{s.byteval}, nil + } + // the original header has already been read and is no longer + // available. read content and put a new header in front of it. + start := headsize(size) + buf := make([]byte, uint64(start)+size) + if err := s.readFull(buf[start:]); err != nil { + return nil, err + } + if kind == String { + puthead(buf, 0x80, 0xB7, size) + } else { + puthead(buf, 0xC0, 0xF7, size) + } + return buf, nil +} + +// Uint reads an RLP string of up to 8 bytes and returns its contents +// as an unsigned integer. If the input does not contain an RLP string, the +// returned error will be ErrExpectedString. +func (s *Stream) Uint() (uint64, error) { + return s.uint(64) +} + +func (s *Stream) uint(maxbits int) (uint64, error) { + kind, size, err := s.Kind() + if err != nil { + return 0, err + } + switch kind { + case Byte: + if s.byteval == 0 { + return 0, ErrCanonInt + } + s.kind = -1 // rearm Kind + return uint64(s.byteval), nil + case String: + if size > uint64(maxbits/8) { + return 0, errUintOverflow + } + v, err := s.readUint(byte(size)) + switch { + case err == ErrCanonSize: + // Adjust error because we're not reading a size right now. + return 0, ErrCanonInt + case err != nil: + return 0, err + case size > 0 && v < 128: + return 0, ErrCanonSize + default: + return v, nil + } + default: + return 0, ErrExpectedString + } +} + +// Bool reads an RLP string of up to 1 byte and returns its contents +// as a boolean. If the input does not contain an RLP string, the +// returned error will be ErrExpectedString. +func (s *Stream) Bool() (bool, error) { + num, err := s.uint(8) + if err != nil { + return false, err + } + switch num { + case 0: + return false, nil + case 1: + return true, nil + default: + return false, fmt.Errorf("rlp: invalid boolean value: %d", num) + } +} + +// List starts decoding an RLP list. If the input does not contain a +// list, the returned error will be ErrExpectedList. When the list's +// end has been reached, any Stream operation will return EOL. +func (s *Stream) List() (size uint64, err error) { + kind, size, err := s.Kind() + if err != nil { + return 0, err + } + if kind != List { + return 0, ErrExpectedList + } + s.stack = append(s.stack, listpos{0, size}) + s.kind = -1 + s.size = 0 + return size, nil +} + +// ListEnd returns to the enclosing list. +// The input reader must be positioned at the end of a list. +func (s *Stream) ListEnd() error { + if len(s.stack) == 0 { + return errNotInList + } + tos := s.stack[len(s.stack)-1] + if tos.pos != tos.size { + return errNotAtEOL + } + s.stack = s.stack[:len(s.stack)-1] // pop + if len(s.stack) > 0 { + s.stack[len(s.stack)-1].pos += tos.size + } + s.kind = -1 + s.size = 0 + return nil +} + +// Decode decodes a value and stores the result in the value pointed +// to by val. Please see the documentation for the Decode function +// to learn about the decoding rules. +func (s *Stream) Decode(val interface{}) error { + if val == nil { + return errDecodeIntoNil + } + rval := reflect.ValueOf(val) + rtyp := rval.Type() + if rtyp.Kind() != reflect.Ptr { + return errNoPointer + } + if rval.IsNil() { + return errDecodeIntoNil + } + decoder, err := cachedDecoder(rtyp.Elem()) + if err != nil { + return err + } + + err = decoder(s, rval.Elem()) + if decErr, ok := err.(*decodeError); ok && len(decErr.ctx) > 0 { + // add decode target type to error so context has more meaning + decErr.ctx = append(decErr.ctx, fmt.Sprint("(", rtyp.Elem(), ")")) + } + return err +} + +// Reset discards any information about the current decoding context +// and starts reading from r. This method is meant to facilitate reuse +// of a preallocated Stream across many decoding operations. +// +// If r does not also implement ByteReader, Stream will do its own +// buffering. +func (s *Stream) Reset(r io.Reader, inputLimit uint64) { + if inputLimit > 0 { + s.remaining = inputLimit + s.limited = true + } else { + // Attempt to automatically discover + // the limit when reading from a byte slice. + switch br := r.(type) { + case *bytes.Reader: + s.remaining = uint64(br.Len()) + s.limited = true + case *strings.Reader: + s.remaining = uint64(br.Len()) + s.limited = true + default: + s.limited = false + } + } + // Wrap r with a buffer if it doesn't have one. + bufr, ok := r.(ByteReader) + if !ok { + bufr = bufio.NewReader(r) + } + s.r = bufr + // Reset the decoding context. + s.stack = s.stack[:0] + s.size = 0 + s.kind = -1 + s.kinderr = nil + if s.uintbuf == nil { + s.uintbuf = make([]byte, 8) + } + s.byteval = 0 +} + +// Kind returns the kind and size of the next value in the +// input stream. +// +// The returned size is the number of bytes that make up the value. +// For kind == Byte, the size is zero because the value is +// contained in the type tag. +// +// The first call to Kind will read size information from the input +// reader and leave it positioned at the start of the actual bytes of +// the value. Subsequent calls to Kind (until the value is decoded) +// will not advance the input reader and return cached information. +func (s *Stream) Kind() (kind Kind, size uint64, err error) { + var tos *listpos + if len(s.stack) > 0 { + tos = &s.stack[len(s.stack)-1] + } + if s.kind < 0 { + s.kinderr = nil + // Don't read further if we're at the end of the + // innermost list. + if tos != nil && tos.pos == tos.size { + return 0, 0, EOL + } + s.kind, s.size, s.kinderr = s.readKind() + if s.kinderr == nil { + if tos == nil { + // At toplevel, check that the value is smaller + // than the remaining input length. + if s.limited && s.size > s.remaining { + s.kinderr = ErrValueTooLarge + } + } else { + // Inside a list, check that the value doesn't overflow the list. + if s.size > tos.size-tos.pos { + s.kinderr = ErrElemTooLarge + } + } + } + } + // Note: this might return a sticky error generated + // by an earlier call to readKind. + return s.kind, s.size, s.kinderr +} + +func (s *Stream) readKind() (kind Kind, size uint64, err error) { + b, err := s.readByte() + if err != nil { + if len(s.stack) == 0 { + // At toplevel, Adjust the error to actual EOF. io.EOF is + // used by callers to determine when to stop decoding. + switch err { + case io.ErrUnexpectedEOF: + err = io.EOF + case ErrValueTooLarge: + err = io.EOF + } + } + return 0, 0, err + } + s.byteval = 0 + switch { + case b < 0x80: + // For a single byte whose value is in the [0x00, 0x7F] range, that byte + // is its own RLP encoding. + s.byteval = b + return Byte, 0, nil + case b < 0xB8: + // Otherwise, if a string is 0-55 bytes long, + // the RLP encoding consists of a single byte with value 0x80 plus the + // length of the string followed by the string. The range of the first + // byte is thus [0x80, 0xB7]. + return String, uint64(b - 0x80), nil + case b < 0xC0: + // If a string is more than 55 bytes long, the + // RLP encoding consists of a single byte with value 0xB7 plus the length + // of the length of the string in binary form, followed by the length of + // the string, followed by the string. For example, a length-1024 string + // would be encoded as 0xB90400 followed by the string. The range of + // the first byte is thus [0xB8, 0xBF]. + size, err = s.readUint(b - 0xB7) + if err == nil && size < 56 { + err = ErrCanonSize + } + return String, size, err + case b < 0xF8: + // If the total payload of a list + // (i.e. the combined length of all its items) is 0-55 bytes long, the + // RLP encoding consists of a single byte with value 0xC0 plus the length + // of the list followed by the concatenation of the RLP encodings of the + // items. The range of the first byte is thus [0xC0, 0xF7]. + return List, uint64(b - 0xC0), nil + default: + // If the total payload of a list is more than 55 bytes long, + // the RLP encoding consists of a single byte with value 0xF7 + // plus the length of the length of the payload in binary + // form, followed by the length of the payload, followed by + // the concatenation of the RLP encodings of the items. The + // range of the first byte is thus [0xF8, 0xFF]. + size, err = s.readUint(b - 0xF7) + if err == nil && size < 56 { + err = ErrCanonSize + } + return List, size, err + } +} + +func (s *Stream) readUint(size byte) (uint64, error) { + switch size { + case 0: + s.kind = -1 // rearm Kind + return 0, nil + case 1: + b, err := s.readByte() + return uint64(b), err + default: + start := int(8 - size) + for i := 0; i < start; i++ { + s.uintbuf[i] = 0 + } + if err := s.readFull(s.uintbuf[start:]); err != nil { + return 0, err + } + if s.uintbuf[start] == 0 { + // Note: readUint is also used to decode integer + // values. The error needs to be adjusted to become + // ErrCanonInt in this case. + return 0, ErrCanonSize + } + return binary.BigEndian.Uint64(s.uintbuf), nil + } +} + +func (s *Stream) readFull(buf []byte) (err error) { + if err := s.willRead(uint64(len(buf))); err != nil { + return err + } + var nn, n int + for n < len(buf) && err == nil { + nn, err = s.r.Read(buf[n:]) + n += nn + } + if err == io.EOF { + err = io.ErrUnexpectedEOF + } + return err +} + +func (s *Stream) readByte() (byte, error) { + if err := s.willRead(1); err != nil { + return 0, err + } + b, err := s.r.ReadByte() + if err == io.EOF { + err = io.ErrUnexpectedEOF + } + return b, err +} + +func (s *Stream) willRead(n uint64) error { + s.kind = -1 // rearm Kind + + if len(s.stack) > 0 { + // check list overflow + tos := s.stack[len(s.stack)-1] + if n > tos.size-tos.pos { + return ErrElemTooLarge + } + s.stack[len(s.stack)-1].pos += n + } + if s.limited { + if n > s.remaining { + return ErrValueTooLarge + } + s.remaining -= n + } + return nil +} diff --git a/vendor/github.com/ethereum/go-ethereum/rlp/doc.go b/vendor/github.com/ethereum/go-ethereum/rlp/doc.go new file mode 100644 index 000000000..b3a81fe23 --- /dev/null +++ b/vendor/github.com/ethereum/go-ethereum/rlp/doc.go @@ -0,0 +1,33 @@ +// Copyright 2014 The go-ethereum Authors +// This file is part of the go-ethereum library. +// +// The go-ethereum 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 go-ethereum 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 go-ethereum library. If not, see <http://www.gnu.org/licenses/>. + +/* +Package rlp implements the RLP serialization format. + +The purpose of RLP (Recursive Linear Prefix) is to encode arbitrarily +nested arrays of binary data, and RLP is the main encoding method used +to serialize objects in Ethereum. The only purpose of RLP is to encode +structure; encoding specific atomic data types (eg. strings, ints, +floats) is left up to higher-order protocols; in Ethereum integers +must be represented in big endian binary form with no leading zeroes +(thus making the integer value zero equivalent to the empty byte +array). + +RLP values are distinguished by a type tag. The type tag precedes the +value in the input stream and defines the size and kind of the bytes +that follow. +*/ +package rlp diff --git a/vendor/github.com/ethereum/go-ethereum/rlp/encode.go b/vendor/github.com/ethereum/go-ethereum/rlp/encode.go new file mode 100644 index 000000000..f255c38a9 --- /dev/null +++ b/vendor/github.com/ethereum/go-ethereum/rlp/encode.go @@ -0,0 +1,651 @@ +// Copyright 2014 The go-ethereum Authors +// This file is part of the go-ethereum library. +// +// The go-ethereum 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 go-ethereum 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 go-ethereum library. If not, see <http://www.gnu.org/licenses/>. + +package rlp + +import ( + "fmt" + "io" + "math/big" + "reflect" + "sync" +) + +var ( + // Common encoded values. + // These are useful when implementing EncodeRLP. + EmptyString = []byte{0x80} + EmptyList = []byte{0xC0} +) + +// Encoder is implemented by types that require custom +// encoding rules or want to encode private fields. +type Encoder interface { + // EncodeRLP should write the RLP encoding of its receiver to w. + // If the implementation is a pointer method, it may also be + // called for nil pointers. + // + // Implementations should generate valid RLP. The data written is + // not verified at the moment, but a future version might. It is + // recommended to write only a single value but writing multiple + // values or no value at all is also permitted. + EncodeRLP(io.Writer) error +} + +// Encode writes the RLP encoding of val to w. Note that Encode may +// perform many small writes in some cases. Consider making w +// buffered. +// +// Encode uses the following type-dependent encoding rules: +// +// If the type implements the Encoder interface, Encode calls +// EncodeRLP. This is true even for nil pointers, please see the +// documentation for Encoder. +// +// To encode a pointer, the value being pointed to is encoded. For nil +// pointers, Encode will encode the zero value of the type. A nil +// pointer to a struct type always encodes as an empty RLP list. +// A nil pointer to an array encodes as an empty list (or empty string +// if the array has element type byte). +// +// Struct values are encoded as an RLP list of all their encoded +// public fields. Recursive struct types are supported. +// +// To encode slices and arrays, the elements are encoded as an RLP +// list of the value's elements. Note that arrays and slices with +// element type uint8 or byte are always encoded as an RLP string. +// +// A Go string is encoded as an RLP string. +// +// An unsigned integer value is encoded as an RLP string. Zero always +// encodes as an empty RLP string. Encode also supports *big.Int. +// +// Boolean values are encoded as unsigned integers zero (false) and one (true). +// +// An interface value encodes as the value contained in the interface. +// +// Signed integers are not supported, nor are floating point numbers, maps, +// channels and functions. +func Encode(w io.Writer, val interface{}) error { + if outer, ok := w.(*encbuf); ok { + // Encode was called by some type's EncodeRLP. + // Avoid copying by writing to the outer encbuf directly. + return outer.encode(val) + } + eb := encbufPool.Get().(*encbuf) + defer encbufPool.Put(eb) + eb.reset() + if err := eb.encode(val); err != nil { + return err + } + return eb.toWriter(w) +} + +// EncodeToBytes returns the RLP encoding of val. +// Please see the documentation of Encode for the encoding rules. +func EncodeToBytes(val interface{}) ([]byte, error) { + eb := encbufPool.Get().(*encbuf) + defer encbufPool.Put(eb) + eb.reset() + if err := eb.encode(val); err != nil { + return nil, err + } + return eb.toBytes(), nil +} + +// EncodeToReader returns a reader from which the RLP encoding of val +// can be read. The returned size is the total size of the encoded +// data. +// +// Please see the documentation of Encode for the encoding rules. +func EncodeToReader(val interface{}) (size int, r io.Reader, err error) { + eb := encbufPool.Get().(*encbuf) + eb.reset() + if err := eb.encode(val); err != nil { + return 0, nil, err + } + return eb.size(), &encReader{buf: eb}, nil +} + +type encbuf struct { + str []byte // string data, contains everything except list headers + lheads []*listhead // all list headers + lhsize int // sum of sizes of all encoded list headers + sizebuf []byte // 9-byte auxiliary buffer for uint encoding +} + +type listhead struct { + offset int // index of this header in string data + size int // total size of encoded data (including list headers) +} + +// encode writes head to the given buffer, which must be at least +// 9 bytes long. It returns the encoded bytes. +func (head *listhead) encode(buf []byte) []byte { + return buf[:puthead(buf, 0xC0, 0xF7, uint64(head.size))] +} + +// headsize returns the size of a list or string header +// for a value of the given size. +func headsize(size uint64) int { + if size < 56 { + return 1 + } + return 1 + intsize(size) +} + +// puthead writes a list or string header to buf. +// buf must be at least 9 bytes long. +func puthead(buf []byte, smalltag, largetag byte, size uint64) int { + if size < 56 { + buf[0] = smalltag + byte(size) + return 1 + } + sizesize := putint(buf[1:], size) + buf[0] = largetag + byte(sizesize) + return sizesize + 1 +} + +// encbufs are pooled. +var encbufPool = sync.Pool{ + New: func() interface{} { return &encbuf{sizebuf: make([]byte, 9)} }, +} + +func (w *encbuf) reset() { + w.lhsize = 0 + if w.str != nil { + w.str = w.str[:0] + } + if w.lheads != nil { + w.lheads = w.lheads[:0] + } +} + +// encbuf implements io.Writer so it can be passed it into EncodeRLP. +func (w *encbuf) Write(b []byte) (int, error) { + w.str = append(w.str, b...) + return len(b), nil +} + +func (w *encbuf) encode(val interface{}) error { + rval := reflect.ValueOf(val) + writer, err := cachedWriter(rval.Type()) + if err != nil { + return err + } + return writer(rval, w) +} + +func (w *encbuf) encodeStringHeader(size int) { + if size < 56 { + w.str = append(w.str, 0x80+byte(size)) + } else { + // TODO: encode to w.str directly + sizesize := putint(w.sizebuf[1:], uint64(size)) + w.sizebuf[0] = 0xB7 + byte(sizesize) + w.str = append(w.str, w.sizebuf[:sizesize+1]...) + } +} + +func (w *encbuf) encodeString(b []byte) { + if len(b) == 1 && b[0] <= 0x7F { + // fits single byte, no string header + w.str = append(w.str, b[0]) + } else { + w.encodeStringHeader(len(b)) + w.str = append(w.str, b...) + } +} + +func (w *encbuf) list() *listhead { + lh := &listhead{offset: len(w.str), size: w.lhsize} + w.lheads = append(w.lheads, lh) + return lh +} + +func (w *encbuf) listEnd(lh *listhead) { + lh.size = w.size() - lh.offset - lh.size + if lh.size < 56 { + w.lhsize++ // length encoded into kind tag + } else { + w.lhsize += 1 + intsize(uint64(lh.size)) + } +} + +func (w *encbuf) size() int { + return len(w.str) + w.lhsize +} + +func (w *encbuf) toBytes() []byte { + out := make([]byte, w.size()) + strpos := 0 + pos := 0 + for _, head := range w.lheads { + // write string data before header + n := copy(out[pos:], w.str[strpos:head.offset]) + pos += n + strpos += n + // write the header + enc := head.encode(out[pos:]) + pos += len(enc) + } + // copy string data after the last list header + copy(out[pos:], w.str[strpos:]) + return out +} + +func (w *encbuf) toWriter(out io.Writer) (err error) { + strpos := 0 + for _, head := range w.lheads { + // write string data before header + if head.offset-strpos > 0 { + n, err := out.Write(w.str[strpos:head.offset]) + strpos += n + if err != nil { + return err + } + } + // write the header + enc := head.encode(w.sizebuf) + if _, err = out.Write(enc); err != nil { + return err + } + } + if strpos < len(w.str) { + // write string data after the last list header + _, err = out.Write(w.str[strpos:]) + } + return err +} + +// encReader is the io.Reader returned by EncodeToReader. +// It releases its encbuf at EOF. +type encReader struct { + buf *encbuf // the buffer we're reading from. this is nil when we're at EOF. + lhpos int // index of list header that we're reading + strpos int // current position in string buffer + piece []byte // next piece to be read +} + +func (r *encReader) Read(b []byte) (n int, err error) { + for { + if r.piece = r.next(); r.piece == nil { + // Put the encode buffer back into the pool at EOF when it + // is first encountered. Subsequent calls still return EOF + // as the error but the buffer is no longer valid. + if r.buf != nil { + encbufPool.Put(r.buf) + r.buf = nil + } + return n, io.EOF + } + nn := copy(b[n:], r.piece) + n += nn + if nn < len(r.piece) { + // piece didn't fit, see you next time. + r.piece = r.piece[nn:] + return n, nil + } + r.piece = nil + } +} + +// next returns the next piece of data to be read. +// it returns nil at EOF. +func (r *encReader) next() []byte { + switch { + case r.buf == nil: + return nil + + case r.piece != nil: + // There is still data available for reading. + return r.piece + + case r.lhpos < len(r.buf.lheads): + // We're before the last list header. + head := r.buf.lheads[r.lhpos] + sizebefore := head.offset - r.strpos + if sizebefore > 0 { + // String data before header. + p := r.buf.str[r.strpos:head.offset] + r.strpos += sizebefore + return p + } + r.lhpos++ + return head.encode(r.buf.sizebuf) + + case r.strpos < len(r.buf.str): + // String data at the end, after all list headers. + p := r.buf.str[r.strpos:] + r.strpos = len(r.buf.str) + return p + + default: + return nil + } +} + +var ( + encoderInterface = reflect.TypeOf(new(Encoder)).Elem() + big0 = big.NewInt(0) +) + +// makeWriter creates a writer function for the given type. +func makeWriter(typ reflect.Type, ts tags) (writer, error) { + kind := typ.Kind() + switch { + case typ == rawValueType: + return writeRawValue, nil + case typ.Implements(encoderInterface): + return writeEncoder, nil + case kind != reflect.Ptr && reflect.PtrTo(typ).Implements(encoderInterface): + return writeEncoderNoPtr, nil + case kind == reflect.Interface: + return writeInterface, nil + case typ.AssignableTo(reflect.PtrTo(bigInt)): + return writeBigIntPtr, nil + case typ.AssignableTo(bigInt): + return writeBigIntNoPtr, nil + case isUint(kind): + return writeUint, nil + case kind == reflect.Bool: + return writeBool, nil + case kind == reflect.String: + return writeString, nil + case kind == reflect.Slice && isByte(typ.Elem()): + return writeBytes, nil + case kind == reflect.Array && isByte(typ.Elem()): + return writeByteArray, nil + case kind == reflect.Slice || kind == reflect.Array: + return makeSliceWriter(typ, ts) + case kind == reflect.Struct: + return makeStructWriter(typ) + case kind == reflect.Ptr: + return makePtrWriter(typ) + default: + return nil, fmt.Errorf("rlp: type %v is not RLP-serializable", typ) + } +} + +func isByte(typ reflect.Type) bool { + return typ.Kind() == reflect.Uint8 && !typ.Implements(encoderInterface) +} + +func writeRawValue(val reflect.Value, w *encbuf) error { + w.str = append(w.str, val.Bytes()...) + return nil +} + +func writeUint(val reflect.Value, w *encbuf) error { + i := val.Uint() + if i == 0 { + w.str = append(w.str, 0x80) + } else if i < 128 { + // fits single byte + w.str = append(w.str, byte(i)) + } else { + // TODO: encode int to w.str directly + s := putint(w.sizebuf[1:], i) + w.sizebuf[0] = 0x80 + byte(s) + w.str = append(w.str, w.sizebuf[:s+1]...) + } + return nil +} + +func writeBool(val reflect.Value, w *encbuf) error { + if val.Bool() { + w.str = append(w.str, 0x01) + } else { + w.str = append(w.str, 0x80) + } + return nil +} + +func writeBigIntPtr(val reflect.Value, w *encbuf) error { + ptr := val.Interface().(*big.Int) + if ptr == nil { + w.str = append(w.str, 0x80) + return nil + } + return writeBigInt(ptr, w) +} + +func writeBigIntNoPtr(val reflect.Value, w *encbuf) error { + i := val.Interface().(big.Int) + return writeBigInt(&i, w) +} + +func writeBigInt(i *big.Int, w *encbuf) error { + if cmp := i.Cmp(big0); cmp == -1 { + return fmt.Errorf("rlp: cannot encode negative *big.Int") + } else if cmp == 0 { + w.str = append(w.str, 0x80) + } else { + w.encodeString(i.Bytes()) + } + return nil +} + +func writeBytes(val reflect.Value, w *encbuf) error { + w.encodeString(val.Bytes()) + return nil +} + +func writeByteArray(val reflect.Value, w *encbuf) error { + if !val.CanAddr() { + // Slice requires the value to be addressable. + // Make it addressable by copying. + copy := reflect.New(val.Type()).Elem() + copy.Set(val) + val = copy + } + size := val.Len() + slice := val.Slice(0, size).Bytes() + w.encodeString(slice) + return nil +} + +func writeString(val reflect.Value, w *encbuf) error { + s := val.String() + if len(s) == 1 && s[0] <= 0x7f { + // fits single byte, no string header + w.str = append(w.str, s[0]) + } else { + w.encodeStringHeader(len(s)) + w.str = append(w.str, s...) + } + return nil +} + +func writeEncoder(val reflect.Value, w *encbuf) error { + return val.Interface().(Encoder).EncodeRLP(w) +} + +// writeEncoderNoPtr handles non-pointer values that implement Encoder +// with a pointer receiver. +func writeEncoderNoPtr(val reflect.Value, w *encbuf) error { + if !val.CanAddr() { + // We can't get the address. It would be possible to make the + // value addressable by creating a shallow copy, but this + // creates other problems so we're not doing it (yet). + // + // package json simply doesn't call MarshalJSON for cases like + // this, but encodes the value as if it didn't implement the + // interface. We don't want to handle it that way. + return fmt.Errorf("rlp: game over: unadressable value of type %v, EncodeRLP is pointer method", val.Type()) + } + return val.Addr().Interface().(Encoder).EncodeRLP(w) +} + +func writeInterface(val reflect.Value, w *encbuf) error { + if val.IsNil() { + // Write empty list. This is consistent with the previous RLP + // encoder that we had and should therefore avoid any + // problems. + w.str = append(w.str, 0xC0) + return nil + } + eval := val.Elem() + writer, err := cachedWriter(eval.Type()) + if err != nil { + return err + } + return writer(eval, w) +} + +func makeSliceWriter(typ reflect.Type, ts tags) (writer, error) { + etypeinfo := cachedTypeInfo1(typ.Elem(), tags{}) + if etypeinfo.writerErr != nil { + return nil, etypeinfo.writerErr + } + writer := func(val reflect.Value, w *encbuf) error { + if !ts.tail { + defer w.listEnd(w.list()) + } + vlen := val.Len() + for i := 0; i < vlen; i++ { + if err := etypeinfo.writer(val.Index(i), w); err != nil { + return err + } + } + return nil + } + return writer, nil +} + +func makeStructWriter(typ reflect.Type) (writer, error) { + fields, err := structFields(typ) + if err != nil { + return nil, err + } + writer := func(val reflect.Value, w *encbuf) error { + lh := w.list() + for _, f := range fields { + if err := f.info.writer(val.Field(f.index), w); err != nil { + return err + } + } + w.listEnd(lh) + return nil + } + return writer, nil +} + +func makePtrWriter(typ reflect.Type) (writer, error) { + etypeinfo := cachedTypeInfo1(typ.Elem(), tags{}) + if etypeinfo.writerErr != nil { + return nil, etypeinfo.writerErr + } + + // determine nil pointer handler + var nilfunc func(*encbuf) error + kind := typ.Elem().Kind() + switch { + case kind == reflect.Array && isByte(typ.Elem().Elem()): + nilfunc = func(w *encbuf) error { + w.str = append(w.str, 0x80) + return nil + } + case kind == reflect.Struct || kind == reflect.Array: + nilfunc = func(w *encbuf) error { + // encoding the zero value of a struct/array could trigger + // infinite recursion, avoid that. + w.listEnd(w.list()) + return nil + } + default: + zero := reflect.Zero(typ.Elem()) + nilfunc = func(w *encbuf) error { + return etypeinfo.writer(zero, w) + } + } + + writer := func(val reflect.Value, w *encbuf) error { + if val.IsNil() { + return nilfunc(w) + } + return etypeinfo.writer(val.Elem(), w) + } + return writer, nil +} + +// putint writes i to the beginning of b in big endian byte +// order, using the least number of bytes needed to represent i. +func putint(b []byte, i uint64) (size int) { + switch { + case i < (1 << 8): + b[0] = byte(i) + return 1 + case i < (1 << 16): + b[0] = byte(i >> 8) + b[1] = byte(i) + return 2 + case i < (1 << 24): + b[0] = byte(i >> 16) + b[1] = byte(i >> 8) + b[2] = byte(i) + return 3 + case i < (1 << 32): + b[0] = byte(i >> 24) + b[1] = byte(i >> 16) + b[2] = byte(i >> 8) + b[3] = byte(i) + return 4 + case i < (1 << 40): + b[0] = byte(i >> 32) + b[1] = byte(i >> 24) + b[2] = byte(i >> 16) + b[3] = byte(i >> 8) + b[4] = byte(i) + return 5 + case i < (1 << 48): + b[0] = byte(i >> 40) + b[1] = byte(i >> 32) + b[2] = byte(i >> 24) + b[3] = byte(i >> 16) + b[4] = byte(i >> 8) + b[5] = byte(i) + return 6 + case i < (1 << 56): + b[0] = byte(i >> 48) + b[1] = byte(i >> 40) + b[2] = byte(i >> 32) + b[3] = byte(i >> 24) + b[4] = byte(i >> 16) + b[5] = byte(i >> 8) + b[6] = byte(i) + return 7 + default: + b[0] = byte(i >> 56) + b[1] = byte(i >> 48) + b[2] = byte(i >> 40) + b[3] = byte(i >> 32) + b[4] = byte(i >> 24) + b[5] = byte(i >> 16) + b[6] = byte(i >> 8) + b[7] = byte(i) + return 8 + } +} + +// intsize computes the minimum number of bytes required to store i. +func intsize(i uint64) (size int) { + for size = 1; ; size++ { + if i >>= 8; i == 0 { + return size + } + } +} diff --git a/vendor/github.com/ethereum/go-ethereum/rlp/raw.go b/vendor/github.com/ethereum/go-ethereum/rlp/raw.go new file mode 100644 index 000000000..2b3f328f6 --- /dev/null +++ b/vendor/github.com/ethereum/go-ethereum/rlp/raw.go @@ -0,0 +1,156 @@ +// Copyright 2015 The go-ethereum Authors +// This file is part of the go-ethereum library. +// +// The go-ethereum 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 go-ethereum 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 go-ethereum library. If not, see <http://www.gnu.org/licenses/>. + +package rlp + +import ( + "io" + "reflect" +) + +// RawValue represents an encoded RLP value and can be used to delay +// RLP decoding or to precompute an encoding. Note that the decoder does +// not verify whether the content of RawValues is valid RLP. +type RawValue []byte + +var rawValueType = reflect.TypeOf(RawValue{}) + +// ListSize returns the encoded size of an RLP list with the given +// content size. +func ListSize(contentSize uint64) uint64 { + return uint64(headsize(contentSize)) + contentSize +} + +// Split returns the content of first RLP value and any +// bytes after the value as subslices of b. +func Split(b []byte) (k Kind, content, rest []byte, err error) { + k, ts, cs, err := readKind(b) + if err != nil { + return 0, nil, b, err + } + return k, b[ts : ts+cs], b[ts+cs:], nil +} + +// SplitString splits b into the content of an RLP string +// and any remaining bytes after the string. +func SplitString(b []byte) (content, rest []byte, err error) { + k, content, rest, err := Split(b) + if err != nil { + return nil, b, err + } + if k == List { + return nil, b, ErrExpectedString + } + return content, rest, nil +} + +// SplitList splits b into the content of a list and any remaining +// bytes after the list. +func SplitList(b []byte) (content, rest []byte, err error) { + k, content, rest, err := Split(b) + if err != nil { + return nil, b, err + } + if k != List { + return nil, b, ErrExpectedList + } + return content, rest, nil +} + +// CountValues counts the number of encoded values in b. +func CountValues(b []byte) (int, error) { + i := 0 + for ; len(b) > 0; i++ { + _, tagsize, size, err := readKind(b) + if err != nil { + return 0, err + } + b = b[tagsize+size:] + } + return i, nil +} + +func readKind(buf []byte) (k Kind, tagsize, contentsize uint64, err error) { + if len(buf) == 0 { + return 0, 0, 0, io.ErrUnexpectedEOF + } + b := buf[0] + switch { + case b < 0x80: + k = Byte + tagsize = 0 + contentsize = 1 + case b < 0xB8: + k = String + tagsize = 1 + contentsize = uint64(b - 0x80) + // Reject strings that should've been single bytes. + if contentsize == 1 && len(buf) > 1 && buf[1] < 128 { + return 0, 0, 0, ErrCanonSize + } + case b < 0xC0: + k = String + tagsize = uint64(b-0xB7) + 1 + contentsize, err = readSize(buf[1:], b-0xB7) + case b < 0xF8: + k = List + tagsize = 1 + contentsize = uint64(b - 0xC0) + default: + k = List + tagsize = uint64(b-0xF7) + 1 + contentsize, err = readSize(buf[1:], b-0xF7) + } + if err != nil { + return 0, 0, 0, err + } + // Reject values larger than the input slice. + if contentsize > uint64(len(buf))-tagsize { + return 0, 0, 0, ErrValueTooLarge + } + return k, tagsize, contentsize, err +} + +func readSize(b []byte, slen byte) (uint64, error) { + if int(slen) > len(b) { + return 0, io.ErrUnexpectedEOF + } + var s uint64 + switch slen { + case 1: + s = uint64(b[0]) + case 2: + s = uint64(b[0])<<8 | uint64(b[1]) + case 3: + s = uint64(b[0])<<16 | uint64(b[1])<<8 | uint64(b[2]) + case 4: + s = uint64(b[0])<<24 | uint64(b[1])<<16 | uint64(b[2])<<8 | uint64(b[3]) + case 5: + s = uint64(b[0])<<32 | uint64(b[1])<<24 | uint64(b[2])<<16 | uint64(b[3])<<8 | uint64(b[4]) + case 6: + s = uint64(b[0])<<40 | uint64(b[1])<<32 | uint64(b[2])<<24 | uint64(b[3])<<16 | uint64(b[4])<<8 | uint64(b[5]) + case 7: + s = uint64(b[0])<<48 | uint64(b[1])<<40 | uint64(b[2])<<32 | uint64(b[3])<<24 | uint64(b[4])<<16 | uint64(b[5])<<8 | uint64(b[6]) + case 8: + s = uint64(b[0])<<56 | uint64(b[1])<<48 | uint64(b[2])<<40 | uint64(b[3])<<32 | uint64(b[4])<<24 | uint64(b[5])<<16 | uint64(b[6])<<8 | uint64(b[7]) + } + // Reject sizes < 56 (shouldn't have separate size) and sizes with + // leading zero bytes. + if s < 56 || b[0] == 0 { + return 0, ErrCanonSize + } + return s, nil +} diff --git a/vendor/github.com/ethereum/go-ethereum/rlp/typecache.go b/vendor/github.com/ethereum/go-ethereum/rlp/typecache.go new file mode 100644 index 000000000..ab5ee3da7 --- /dev/null +++ b/vendor/github.com/ethereum/go-ethereum/rlp/typecache.go @@ -0,0 +1,165 @@ +// Copyright 2014 The go-ethereum Authors +// This file is part of the go-ethereum library. +// +// The go-ethereum 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 go-ethereum 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 go-ethereum library. If not, see <http://www.gnu.org/licenses/>. + +package rlp + +import ( + "fmt" + "reflect" + "strings" + "sync" +) + +var ( + typeCacheMutex sync.RWMutex + typeCache = make(map[typekey]*typeinfo) +) + +type typeinfo struct { + decoder decoder + decoderErr error // error from makeDecoder + writer writer + writerErr error // error from makeWriter +} + +// represents struct tags +type tags struct { + // rlp:"nil" controls whether empty input results in a nil pointer. + nilOK bool + // rlp:"tail" controls whether this field swallows additional list + // elements. It can only be set for the last field, which must be + // of slice type. + tail bool + // rlp:"-" ignores fields. + ignored bool +} + +type typekey struct { + reflect.Type + // the key must include the struct tags because they + // might generate a different decoder. + tags +} + +type decoder func(*Stream, reflect.Value) error + +type writer func(reflect.Value, *encbuf) error + +func cachedDecoder(typ reflect.Type) (decoder, error) { + info := cachedTypeInfo(typ, tags{}) + return info.decoder, info.decoderErr +} + +func cachedWriter(typ reflect.Type) (writer, error) { + info := cachedTypeInfo(typ, tags{}) + return info.writer, info.writerErr +} + +func cachedTypeInfo(typ reflect.Type, tags tags) *typeinfo { + typeCacheMutex.RLock() + info := typeCache[typekey{typ, tags}] + typeCacheMutex.RUnlock() + if info != nil { + return info + } + // not in the cache, need to generate info for this type. + typeCacheMutex.Lock() + defer typeCacheMutex.Unlock() + return cachedTypeInfo1(typ, tags) +} + +func cachedTypeInfo1(typ reflect.Type, tags tags) *typeinfo { + key := typekey{typ, tags} + info := typeCache[key] + if info != nil { + // another goroutine got the write lock first + return info + } + // put a dummy value into the cache before generating. + // if the generator tries to lookup itself, it will get + // the dummy value and won't call itself recursively. + info = new(typeinfo) + typeCache[key] = info + info.generate(typ, tags) + return info +} + +type field struct { + index int + info *typeinfo +} + +func structFields(typ reflect.Type) (fields []field, err error) { + lastPublic := lastPublicField(typ) + for i := 0; i < typ.NumField(); i++ { + if f := typ.Field(i); f.PkgPath == "" { // exported + tags, err := parseStructTag(typ, i, lastPublic) + if err != nil { + return nil, err + } + if tags.ignored { + continue + } + info := cachedTypeInfo1(f.Type, tags) + fields = append(fields, field{i, info}) + } + } + return fields, nil +} + +func parseStructTag(typ reflect.Type, fi, lastPublic int) (tags, error) { + f := typ.Field(fi) + var ts tags + for _, t := range strings.Split(f.Tag.Get("rlp"), ",") { + switch t = strings.TrimSpace(t); t { + case "": + case "-": + ts.ignored = true + case "nil": + ts.nilOK = true + case "tail": + ts.tail = true + if fi != lastPublic { + return ts, fmt.Errorf(`rlp: invalid struct tag "tail" for %v.%s (must be on last field)`, typ, f.Name) + } + if f.Type.Kind() != reflect.Slice { + return ts, fmt.Errorf(`rlp: invalid struct tag "tail" for %v.%s (field type is not slice)`, typ, f.Name) + } + default: + return ts, fmt.Errorf("rlp: unknown struct tag %q on %v.%s", t, typ, f.Name) + } + } + return ts, nil +} + +func lastPublicField(typ reflect.Type) int { + last := 0 + for i := 0; i < typ.NumField(); i++ { + if typ.Field(i).PkgPath == "" { + last = i + } + } + return last +} + +func (i *typeinfo) generate(typ reflect.Type, tags tags) { + i.decoder, i.decoderErr = makeDecoder(typ, tags) + i.writer, i.writerErr = makeWriter(typ, tags) +} + +func isUint(k reflect.Kind) bool { + return k >= reflect.Uint && k <= reflect.Uintptr +} |