3F35E82D378DCE…2CB0FFE03C85

Arguments · 7

1. #1daoauth
2. #2daoauth.gno
3. #3// Package daoauth writes the arguments of a governed action as one typed, // canonical string. memba_gov stores that string with the proposal and the // target realm rebuilds it from its real arguments when it consumes the // approval: the two must be equal byte for byte. Each value has exactly one // spelling, so equal actions always encode to equal strings. // // Fields are joined by "|": // // u:<uint64> decimal, no sign, no leading zero // i:<int64> decimal, "-" only when negative, no leading zero // b:0 or b:1 bool // a:<address> the lowercase bech32 text the chain gives a caller // s:<len>:<text> length-prefixed printable ASCII (0x20-0x7E) // // Strings are compared as raw bytes, with no Unicode normalisation; text is // printable ASCII so that what a voter reads is exactly what executes. package daoauth import ( "errors" "strconv" "strings" ) const ( MaxArgs = 1024 // bytes of one encoded argument string MaxText = 512 // bytes of one string field ) var ( ErrSyntax = errors.New("daoauth: malformed argument string") ErrAddress = errors.New("daoauth: address is not lowercase bech32") ErrText = errors.New("daoauth: text must be printable ASCII of at most 512 bytes") ErrLength = errors.New("daoauth: arguments exceed 1024 bytes") ) // Args accumulates fields in order. Methods panic on a value that has no // canonical form, so a realm can never build an approval nobody can match. type Args struct{ fields []string } func New() *Args { return &Args{} } func (a *Args) Uint(v uint64) *Args { return a.add("u:" + strconv.FormatUint(v, 10)) } func (a *Args) Int(v int64) *Args { return a.add("i:" + strconv.FormatInt(v, 10)) } func (a *Args) Bool(v bool) *Args { if v { return a.add("b:1") } return a.add("b:0") } func (a *Args) Addr(v address) *Args { if !ValidAddress(v) { panic(ErrAddress.Error()) } return a.add("a:" + string(v)) } func (a *Args) Str(v string) *Args { if !ValidText(v) { panic(ErrText.Error()) } return a.add("s:" + strconv.Itoa(len(v)) + ":" + v) } func (a *Args) add(f string) *Args { a.fields = append(a.fields, f) return a } // String returns the encoding. It panics past MaxArgs. func (a *Args) String() string { s := strings.Join(a.fields, "|") if len(s) > MaxArgs { panic(ErrLength.Error()) } return s } // Field is one decoded value: Tag is 'u', 'i', 'b', 'a' or 's', and Value // is its text, without the length prefix for strings. type Field struct { Tag byte Value string } // Parse decodes s and refuses any text that is not the canonical encoding of // its own fields. The empty string is the encoding of no fields. func Parse(s string) ([]Field, error) { if len(s) > MaxArgs { return nil, ErrLength } var out []Field for len(s) > 0 { if len(s) < 2 || s[1] != ':' { return nil, ErrSyntax } tag, rest := s[0], s[2:] var v string if tag == 's' { i := strings.IndexByte(rest, ':') if i < 1 { return nil, ErrSyntax } n, err := strconv.Atoi(rest[:i]) if err != nil || n < 0 || strconv.Itoa(n) != rest[:i] || n > len(rest)-i-1 { return nil, ErrSyntax } v, rest = rest[i+1:i+1+n], rest[i+1+n:] if !ValidText(v) { return nil, ErrText } } else { i := strings.IndexByte(rest, '|') if i < 0 { i = len(rest) } v, rest = rest[:i], rest[i:] if err := checkScalar(tag, v); err != nil { return nil, err } } out = append(out, Field{Tag: tag, Value: v}) if len(rest) > 0 { if rest[0] != '|' || len(rest) == 1 { return nil, ErrSyntax } rest = rest[1:] } s = rest } return out, nil } func checkScalar(tag byte, v string) error { switch tag { case 'u': n, err := strconv.ParseUint(v, 10, 64) if err != nil || strconv.FormatUint(n, 10) != v { return ErrSyntax } case 'i': n, err := strconv.ParseInt(v, 10, 64) if err != nil || strconv.FormatInt(n, 10) != v { return ErrSyntax } case 'b': if v != "0" && v != "1" { return ErrSyntax } case 'a': if !ValidAddress(address(v)) { return ErrAddress } default: return ErrSyntax } return nil } // ValidText reports whether s is at most MaxText bytes of printable ASCII // (0x20 to 0x7E): no control, invisible, combining or direction-changing // character can make a value read differently from what executes. func ValidText(s string) bool { if len(s) > MaxText { return false } for i := 0; i < len(s); i++ { if s[i] < 0x20 || s[i] > 0x7e { return false } } return true } // The chain decodes four texts to one address: the lowercase bech32 text it // gives a caller, that text in capitals, and the bech32m checksum in either // case. Only the first ever equals cur.Previous().Address(). The check below // is the one of launchpad meta/v1, copied rather than imported so governance // does not depend on the Launchpad release. It reads the text instead of // decoding it. // bech32Value holds, for each character of the bech32 alphabet, its 5-bit // value plus one. Zero marks every other byte, capitals included. var bech32Value = [256]byte{ 'q': 1, 'p': 2, 'z': 3, 'r': 4, 'y': 5, '9': 6, 'x': 7, '8': 8, 'g': 9, 'f': 10, '2': 11, 't': 12, 'v': 13, 'd': 14, 'w': 15, '0': 16, 's': 17, '3': 18, 'j': 19, 'n': 20, '5': 21, '4': 22, 'k': 23, 'h': 24, 'c': 25, 'e': 26, '6': 27, 'm': 28, 'u': 29, 'a': 30, '7': 31, 'l': 32, } // bech32Gen[t] is the XOR of the BIP-173 generators selected by the bits of t. var bech32Gen = [32]uint32{ 0x00000000, 0x3b6a57b2, 0x26508e6d, 0x1d3ad9df, 0x1ea119fa, 0x25cb4e48, 0x38f19797, 0x039bc025, 0x3d4233dd, 0x0628646f, 0x1b12bdb0, 0x2078ea02, 0x23e32a27, 0x18897d95, 0x05b3a44a, 0x3ed9f3f8, 0x2a1462b3, 0x117e3501, 0x0c44ecde, 0x372ebb6c, 0x34b57b49, 0x0fdf2cfb, 0x12e5f524, 0x298fa296, 0x1756516e, 0x2c3c06dc, 0x3106df03, 0x0a6c88b1, 0x09f74894, 0x329d1f26, 0x2fa7c6f9, 0x14cd914b, } // bech32PrefixState is the checksum state after the prefix "g" (3, 0, 7). const bech32PrefixState uint32 = 0x8c07 // ValidAddress reports whether a is "g1" and 38 lowercase bech32 characters // whose checksum is the original bech32 one. func ValidAddress(a address) bool { s := string(a) if len(s) != 40 || s[0] != 'g' || s[1] != '1' { return false } chk := bech32PrefixState for i := 2; i < 40; i++ { v := bech32Value[s[i]] if v == 0 { return false } chk = (chk&0x1ffffff)<<5 ^ uint32(v-1) ^ bech32Gen[chk>>25] } return chk == 1 }
4. #4gnomod.toml
5. #5module = "gno.land/p/samcrew/daoauth" gno = "0.9"
6. #6/gno.MemPackageType
7. #7 MPUserAll