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feat: sol sign off chain message OK-34534 OK-34533 (#6448)
* feat: sol sign off chain message * chore: fix lint * chore: fix lint
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,173 @@ | ||
| /* eslint-disable @typescript-eslint/no-unnecessary-type-assertion */ | ||
| /* eslint-disable no-bitwise */ | ||
| /* eslint-disable spellcheck/spell-checker */ | ||
|
|
||
| // Max off-chain message length supported by Ledger | ||
| const OFFCM_MAX_LEDGER_LEN = 1212; | ||
| // Max length of version 0 off-chain message | ||
| const OFFCM_MAX_V0_LEN = 65_515; | ||
|
|
||
| function isValidUTF8(data: Uint8Array): boolean { | ||
| const length = data.length; | ||
| let i = 0; | ||
|
|
||
| while (i < length) { | ||
| if (data[i] < 0x80) { | ||
| /* 0xxxxxxx */ | ||
| // eslint-disable-next-line no-plusplus | ||
| ++i; | ||
| } else if ((data[i] & 0xe0) === 0xc0) { | ||
| /* 110XXXXx 10xxxxxx */ | ||
| if ( | ||
| i + 1 >= length || | ||
| (data[i + 1] & 0xc0) !== 0x80 || | ||
| (data[i] & 0xfe) === 0xc0 | ||
| ) { | ||
| /* overlong? */ return false; | ||
| } | ||
| i += 2; | ||
| } else if ((data[i] & 0xf0) === 0xe0) { | ||
| /* 1110XXXX 10Xxxxxx 10xxxxxx */ | ||
| if ( | ||
| i + 2 >= length || | ||
| (data[i + 1] & 0xc0) !== 0x80 || | ||
| (data[i + 2] & 0xc0) !== 0x80 || | ||
| (data[i] === 0xe0 && (data[i + 1] & 0xe0) === 0x80) /* overlong? */ || | ||
| (data[i] === 0xed && (data[i + 1] & 0xe0) === 0xa0) /* surrogate? */ || | ||
| (data[i] === 0xef && | ||
| data[i + 1] === 0xbf && | ||
| (data[i + 2] & 0xfe) === 0xbe) | ||
| ) { | ||
| /* U+FFFE or U+FFFF? */ return false; | ||
| } | ||
| i += 3; | ||
| } else if ((data[i] & 0xf8) === 0xf0) { | ||
| /* 11110XXX 10XXxxxx 10xxxxxx 10xxxxxx */ | ||
| if ( | ||
| i + 3 >= length || | ||
| (data[i + 1] & 0xc0) !== 0x80 || | ||
| (data[i + 2] & 0xc0) !== 0x80 || | ||
| (data[i + 3] & 0xc0) !== 0x80 || | ||
| (data[i] === 0xf0 && (data[i + 1] & 0xf0) === 0x80) /* overlong? */ || | ||
| (data[i] === 0xf4 && data[i + 1] > 0x8f) || | ||
| data[i] > 0xf4 | ||
| ) { | ||
| /* > U+10FFFF? */ return false; | ||
| } | ||
| i += 4; | ||
| } else { | ||
| return false; | ||
| } | ||
| } | ||
| return true; | ||
| } | ||
|
|
||
| export class OffchainMessage { | ||
| version: number; | ||
|
|
||
| messageFormat: number | undefined; | ||
|
|
||
| message: Buffer | undefined; | ||
|
|
||
| /** | ||
| * Constructs a new OffchainMessage | ||
| * @param {version: number, messageFormat: number, message: string | Buffer} opts - Constructor parameters | ||
| */ | ||
| constructor(opts: { | ||
| version?: number; | ||
| messageFormat?: number; | ||
| message: Buffer; | ||
| }) { | ||
| this.version = 0; | ||
| this.messageFormat = undefined; | ||
| this.message = undefined; | ||
|
|
||
| if (!opts) { | ||
| return; | ||
| } | ||
| if (opts.version) { | ||
| this.version = opts.version; | ||
| } | ||
| if (opts.messageFormat) { | ||
| this.messageFormat = opts.messageFormat; | ||
| } | ||
| if (opts.message) { | ||
| this.message = Buffer.from(opts.message); | ||
| if (this.version === 0) { | ||
| if (!this.messageFormat) { | ||
| this.messageFormat = OffchainMessage.guessMessageFormat(this.message); | ||
| } | ||
| } | ||
| } | ||
| } | ||
|
|
||
| static guessMessageFormat(message: Buffer) { | ||
| if (Object.prototype.toString.call(message) !== '[object Uint8Array]') { | ||
| return undefined; | ||
| } | ||
| if (message.length <= OFFCM_MAX_LEDGER_LEN) { | ||
| if (OffchainMessage.isPrintableASCII(message)) { | ||
| return 0; | ||
| } | ||
| if (OffchainMessage.isUTF8(message)) { | ||
| return 1; | ||
| } | ||
| } else if (message.length <= OFFCM_MAX_V0_LEN) { | ||
| if (OffchainMessage.isUTF8(message)) { | ||
| return 2; | ||
| } | ||
| } | ||
| return undefined; | ||
| } | ||
|
|
||
| static isPrintableASCII(buffer: Buffer) { | ||
| return ( | ||
| buffer && buffer.every((element) => element >= 0x20 && element <= 0x7e) | ||
| ); | ||
| } | ||
|
|
||
| static isUTF8(buffer: Buffer) { | ||
| return buffer && isValidUTF8(buffer); | ||
| } | ||
|
|
||
| isValid() { | ||
| if (this.version !== 0) { | ||
| return false; | ||
| } | ||
| if (!this.message) { | ||
| return false; | ||
| } | ||
| const format = OffchainMessage.guessMessageFormat(this.message); | ||
| return format != null && format === this.messageFormat; | ||
| } | ||
|
|
||
| isLedgerSupported(allowBlindSigning: boolean) { | ||
| return ( | ||
| this.isValid() && | ||
| (this.messageFormat === 0 || | ||
| (this.messageFormat === 1 && allowBlindSigning)) | ||
| ); | ||
| } | ||
|
|
||
| serialize() { | ||
| if (!this.isValid()) { | ||
| throw new Error(`Invalid OffchainMessage: ${JSON.stringify(this)}`); | ||
| } | ||
| const buffer = Buffer.alloc(4); | ||
| if (!this.message) { | ||
| throw new Error('message is null'); | ||
| } | ||
| if (this.messageFormat === undefined) { | ||
| throw new Error('messageFormat is null'); | ||
| } | ||
| let offset = buffer.writeUInt8(this.version); | ||
| offset = buffer.writeUInt8(this.messageFormat, offset); | ||
| offset = buffer.writeUInt16LE(this.message.length, offset); | ||
| return Buffer.concat([ | ||
| Buffer.from([255]), | ||
| Buffer.from('solana offchain'), | ||
| buffer, | ||
| this.message, | ||
| ]); | ||
| } | ||
| } |
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