110 lines
3.6 KiB
TypeScript
110 lines
3.6 KiB
TypeScript
import {
|
|
keccak256 as _keccak256, sha256 as _sha256
|
|
} from "../crypto/index.js";
|
|
import {
|
|
concat, dataLength, getBytes, hexlify, toArray, toTwos, toUtf8Bytes, zeroPadBytes, zeroPadValue,
|
|
throwArgumentError
|
|
} from "../utils/index.js";
|
|
|
|
|
|
const regexBytes = new RegExp("^bytes([0-9]+)$");
|
|
const regexNumber = new RegExp("^(u?int)([0-9]*)$");
|
|
const regexArray = new RegExp("^(.*)\\[([0-9]*)\\]$");
|
|
|
|
|
|
function _pack(type: string, value: any, isArray?: boolean): Uint8Array {
|
|
switch(type) {
|
|
case "address":
|
|
if (isArray) { return getBytes(zeroPadValue(value, 32)); }
|
|
return getBytes(value);
|
|
case "string":
|
|
return toUtf8Bytes(value);
|
|
case "bytes":
|
|
return getBytes(value);
|
|
case "bool":
|
|
value = (!!value ? "0x01": "0x00");
|
|
if (isArray) { return getBytes(zeroPadValue(value, 32)); }
|
|
return getBytes(value);
|
|
}
|
|
|
|
let match = type.match(regexNumber);
|
|
if (match) {
|
|
let size = parseInt(match[2] || "256")
|
|
|
|
if ((match[2] && String(size) !== match[2]) || (size % 8 !== 0) || size === 0 || size > 256) {
|
|
return throwArgumentError("invalid number type", "type", type)
|
|
}
|
|
|
|
if (isArray) { size = 256; }
|
|
|
|
value = toTwos(value, size);
|
|
|
|
return getBytes(zeroPadValue(toArray(value), size / 8));
|
|
}
|
|
|
|
match = type.match(regexBytes);
|
|
if (match) {
|
|
const size = parseInt(match[1]);
|
|
|
|
if (String(size) !== match[1] || size === 0 || size > 32) {
|
|
return throwArgumentError("invalid bytes type", "type", type)
|
|
}
|
|
if (dataLength(value) !== size) {
|
|
return throwArgumentError(`invalid value for ${ type }`, "value", value)
|
|
}
|
|
if (isArray) { return getBytes(zeroPadBytes(value, 32)); }
|
|
return value;
|
|
}
|
|
|
|
match = type.match(regexArray);
|
|
if (match && Array.isArray(value)) {
|
|
const baseType = match[1];
|
|
const count = parseInt(match[2] || String(value.length));
|
|
if (count != value.length) {
|
|
throwArgumentError(`invalid array length for ${ type }`, "value", value)
|
|
}
|
|
const result: Array<Uint8Array> = [];
|
|
value.forEach(function(value) {
|
|
result.push(_pack(baseType, value, true));
|
|
});
|
|
return getBytes(concat(result));
|
|
}
|
|
|
|
return throwArgumentError("invalid type", "type", type)
|
|
}
|
|
|
|
// @TODO: Array Enum
|
|
|
|
export function solidityPacked(types: ReadonlyArray<string>, values: ReadonlyArray<any>): string {
|
|
if (types.length != values.length) {
|
|
throwArgumentError("wrong number of values; expected ${ types.length }", "values", values)
|
|
}
|
|
const tight: Array<Uint8Array> = [];
|
|
types.forEach(function(type, index) {
|
|
tight.push(_pack(type, values[index]));
|
|
});
|
|
return hexlify(concat(tight));
|
|
}
|
|
|
|
/**
|
|
* Computes the non-standard packed (tightly packed) keccak256 hash of
|
|
* the values given the types.
|
|
*
|
|
* @param {Array<string>} types - The Solidity types to interpret each value as [default: bar]
|
|
* @param {Array<any>} values - The values to pack
|
|
*
|
|
* @returns: {HexString} the hexstring of the hash
|
|
* @example:
|
|
* solidityPackedKeccak256([ "address", "uint" ], [ "0x1234", 45 ]);
|
|
* //_result:
|
|
*
|
|
* @see https://docs.soliditylang.org/en/v0.8.14/abi-spec.html#non-standard-packed-mode
|
|
*/
|
|
export function solidityPackedKeccak256(types: ReadonlyArray<string>, values: ReadonlyArray<any>): string {
|
|
return _keccak256(solidityPacked(types, values));
|
|
}
|
|
|
|
export function solidityPackedSha256(types: ReadonlyArray<string>, values: ReadonlyArray<any>): string {
|
|
return _sha256(solidityPacked(types, values));
|
|
}
|