uint 256

governance/xc_admin/packages/xc_admin_common/package.json

@@ -26,6 +26,7 @@
  "@solana/buffer-layout": "^4.0.1",
  "@solana/web3.js": "^1.73.0",
  "@sqds/mesh": "^1.0.6",
+ "bigint-buffer": "^1.1.5",
  "ethers": "^5.7.2",
  "lodash": "^4.17.21",
  "typescript": "^4.9.4"
@@ -34,9 +35,9 @@
  "@types/bn.js": "^5.1.1",
  "@types/jest": "^29.2.5",
  "@types/lodash": "^4.14.191",
+ "fast-check": "^3.10.0",
  "jest": "^29.3.1",
  "prettier": "^2.8.1",
- "ts-jest": "^29.0.3",
- "fast-check": "^3.10.0"
+ "ts-jest": "^29.0.3"
  }
 }

governance/xc_admin/packages/xc_admin_common/src/governance_payload/BufferLayoutExt.ts

@@ -1,25 +1,20 @@
 import { Layout } from "@solana/buffer-layout";
+import { toBigIntBE, toBufferBE } from "bigint-buffer";
 
-export class UInt64BE extends Layout<bigint> {
+export class UIntBE extends Layout<bigint> {
+ // span is the number of bytes to read
  constructor(span: number, property?: string) {
  super(span, property);
  }
 
- // Note: we can not use read/writeBigUInt64BE because it is not supported in the browsers
  override decode(b: Uint8Array, offset?: number): bigint {
  let o = offset ?? 0;
  const buffer = Buffer.from(b.slice(o, o + this.span));
- const hi32 = buffer.readUInt32BE();
- const lo32 = buffer.readUInt32BE(4);
- return BigInt(lo32) + (BigInt(hi32) << BigInt(32));
+ return toBigIntBE(buffer);
  }
 
  override encode(src: bigint, b: Uint8Array, offset?: number): number {
- const buffer = Buffer.alloc(this.span);
- const hi32 = Number(src >> BigInt(32));
- const lo32 = Number(src & BigInt(0xffffffff));
- buffer.writeUInt32BE(hi32, 0);
- buffer.writeUInt32BE(lo32, 4);
+ const buffer = toBufferBE(src, this.span);
  b.set(buffer, offset);
  return this.span;
  }
@@ -45,8 +40,13 @@ export class HexBytes extends Layout<string> {
 }
 
 /** A big-endian u64, returned as a bigint. */
-export function u64be(property?: string | undefined): UInt64BE {
- return new UInt64BE(8, property);
+export function u64be(property?: string | undefined): UIntBE {
+ return new UIntBE(8, property);
+}
+
+/** A big-endian u256, returned as a bigint. */
+export function u256be(property?: string | undefined): UIntBE {
+ return new UIntBE(32, property);
 }
 
 /** An array of numBytes bytes, returned as a hexadecimal string. */