Fix non-ASCII chars in contracts, fix broadcast serialization

Author: mattglory

contracts/flashstack-pool-oracle.clar

@@ -9,7 +9,7 @@
 ;;   - Pool balance only increases (fees flow in, verified by reserve invariant)
 ;;   - Flash loans cannot inflate the pool: the reserve invariant check inside
 ;;     flashstack-stx-pool ensures balance grows by >= fee after every loan
-;;   - No external price feeds required — purely on-chain, single-asset
+;;   - No external price feeds required  -  purely on-chain, single-asset
 ;;
 ;; Integration pattern for lending protocols:
 ;;   1. Call get-share-price to get current STX value per share (in microstacks)

contracts/flashstack-sbtc-pool.clar

@@ -2,7 +2,7 @@
 ;;
 ;; LP pool for canonical sBTC flash loans.
 ;; Depositors earn sBTC yield from every flash loan fee.
-;; Share value is denominated in sats — appreciates with BTC.
+;; Share value is denominated in sats  -  appreciates with BTC.
 ;;
 ;; Share model (identical to flashstack-stx-pool but in sats):
 ;;   shares_minted = deposit * total_shares / pool_balance
@@ -12,14 +12,14 @@
 ;;
 ;; Collateral oracle:
 ;;   get-share-price returns sats per share (scaled by SHARE-PRECISION)
-;;   Lending protocols can call this directly — no external oracle needed
+;;   Lending protocols can call this directly  -  no external oracle needed
 ;;   Flash loan manipulation-resistant: reserve invariant guarantees
 ;;   pool balance only ever grows by >= fee per loan
 ;;
 ;; Security model:
 ;;   - Receiver whitelist prevents arbitrary contracts from borrowing
 ;;   - Repayment verified by reserve balance before/after
-;;   - Admin cannot drain pool — only set parameters
+;;   - Admin cannot drain pool  -  only set parameters
 
 (use-trait sbtc-flash-receiver-trait 'SP20XD46NGAX05ZQZDKFYCCX49A3852BQABNP0VG5.sbtc-flash-receiver-trait.sbtc-flash-receiver-trait)
 
@@ -52,7 +52,7 @@
 (define-data-var total-volume    uint      u0)
 (define-data-var total-fees      uint      u0)
 
-(define-constant SHARE-PRECISION u100000000) ;; 1e8 — matches sBTC sat precision
+(define-constant SHARE-PRECISION u100000000) ;; 1e8  -  matches sBTC sat precision
 
 (define-map approved-receivers principal bool)
 (define-map lp-shares          principal uint)
@@ -138,7 +138,7 @@
     ;; Invoke receiver callback
     (try! (contract-call? receiver execute-sbtc-flash amount (as-contract tx-sender)))
 
-    ;; Verify repayment — reserve must have grown by >= fee
+    ;; Verify repayment  -  reserve must have grown by >= fee
     (let ((reserve-after (unwrap!
             (contract-call? 'SM3VDXK3WZZSA84XXFKAFAF15NNZX32CTSG82JFQ4.sbtc-token
               get-balance (as-contract tx-sender))
@@ -202,7 +202,7 @@
 )
 
 ;; =============================================
-;; Read-only — including collateral oracle
+;; Read-only  -  including collateral oracle
 ;; =============================================
 
 ;; Current value of one pool share in sats, scaled by SHARE-PRECISION (1e8).

contracts/velar-sbtc-arb-receiver.clar

@@ -1,4 +1,4 @@
-;; FlashStack — Velar sBTC Arbitrage Receiver
+;; FlashStack  -  Velar sBTC Arbitrage Receiver
 ;;
 ;; Borrows canonical sBTC from flashstack-sbtc-core, swaps it for wSTX
 ;; on the Velar wSTX<>sBTC pool (pool ID 70), then swaps back to sBTC and repays.
@@ -17,10 +17,10 @@
 ;;   2. Leg 1: swap sBTC -> wSTX (sBTC is token1 in pool 70, wSTX is token0)
 ;;   3. Leg 2: swap wSTX -> sBTC
 ;;   4. Repay core: amount + 0.05% fee (min 1 sat)
-;;   5. Any surplus sBTC stays here — sweep via sweep-sbtc
+;;   5. Any surplus sBTC stays here  -  sweep via sweep-sbtc
 ;;
 ;; Note: must be whitelisted in flashstack-sbtc-core before borrowing.
-;; min-out is u1 on both legs — repayment invariant is the real safety gate.
+;; min-out is u1 on both legs  -  repayment invariant is the real safety gate.
 
 (impl-trait 'SP20XD46NGAX05ZQZDKFYCCX49A3852BQABNP0VG5.sbtc-flash-receiver-trait.sbtc-flash-receiver-trait)
 
@@ -54,7 +54,7 @@
     (owed    (+ amount fee))
   )
     ;; Leg 1: sBTC -> wSTX
-    ;; Pool 70: token0=wSTX, token1=sBTC — swapping token1 for token0
+    ;; Pool 70: token0=wSTX, token1=sBTC  -  swapping token1 for token0
     (unwrap!
       (as-contract (contract-call? 'SP1Y5YSTAHZ88XYK1VPDH24GY0HPX5J4JECTMY4A1.univ2-router
         swap-exact-tokens-for-tokens

scripts/deploy-lp-oracle-and-sbtc-pool.mjs

@@ -74,8 +74,11 @@ async function waitForConfirm(txid, label) {
 }
 
 async function broadcast(tx) {
-  // tx.serialize() returns raw Uint8Array — always safe to POST as octet-stream
-  const bytes = tx.serialize();
+  // serialize() may return hex string or Uint8Array depending on SDK version
+  const raw = tx.serialize();
+  const bytes = typeof raw === "string"
+    ? Buffer.from(raw.replace(/^0x/, ""), "hex")
+    : raw;
   const res = await fetch(`${API}/v2/transactions`, {
     method:  "POST",
     headers: { "Content-Type": "application/octet-stream" },