fix: encode bigint values as bytes correctly without overflowing

Author: boblat

examples/auction/contract.algo.ts

@@ -81,7 +81,7 @@ export class Auction extends Contract {
   }
 
   @abimethod({ allowActions: 'OptIn' })
-  public optInToApplication(): void { }
+  public optInToApplication(): void {}
 
   public bid(payment: gtxn.PaymentTxn): void {
     /// Ensure auction hasn't ended

package-lock.json

@@ -66,8 +66,8 @@
     "vitest": "3.0.9"
   },
   "dependencies": {
-    "@algorandfoundation/algorand-typescript": "1.0.0-alpha.47",
-    "@algorandfoundation/puya-ts": "1.0.0-alpha.47",
+    "@algorandfoundation/algorand-typescript": "1.0.0-alpha.49",
+    "@algorandfoundation/puya-ts": "1.0.0-alpha.49",
     "elliptic": "^6.6.1",
     "js-sha256": "^0.11.0",
     "js-sha3": "^0.9.3",

package.json

@@ -63,7 +63,7 @@ export const getEncoder = <T>(typeInfo: TypeInfo): fromBytes<T> => {
 }
 
 export const toBytes = (val: unknown): bytes => {
-  const uint64Val = asMaybeUint64Cls(val)
+  const uint64Val = asMaybeUint64Cls(val, false)
   if (uint64Val !== undefined) {
     return uint64Val.toBytes().asAlgoTs()
   }

src/encoders.ts

@@ -42,12 +42,14 @@ export const asBytes = (val: StubBytesCompat | Uint8Array) => asBytesCls(val).as
 
 export const asUint8Array = (val: StubBytesCompat | Uint8Array) => asBytesCls(val).asUint8Array()
 
-export const asMaybeUint64Cls = (val: DeliberateAny) => {
+export const asMaybeUint64Cls = (val: DeliberateAny, throwsOverflow: boolean = true) => {
   try {
     return Uint64Cls.fromCompat(val)
   } catch (e) {
     if (e instanceof InternalError) {
       // swallow error and return undefined
+    } else if (!throwsOverflow && e instanceof AvmError && e.message.includes('overflow')) {
+      // swallow overflow error and return undefined
     } else {
       throw e
     }