feat: add cNGN/USDT BSC testnet corridor template

- Add new corridor entry for cNGN/USDT on BNB Smart Chain testnet (chain 97) to setup catalog
- Add cngn-usdt-bsc-testnet.toml template with testnet-specific configuration: public BSC testnet RPC, staging indexer URL, and faucet links for test tokens
- Configure real cNGN (6 decimals) and faucet USDT (18 decimals) pool parameters with symmetric 1 bps buy/sell offsets
- Mark reactor address as placeholder to be filled in after deployment
- Bump version to 0.1.102

Author: bnolens

.textile-monorepo-source

@@ -1 +1 @@
-56bf56642e56e2ba05eb5cdf5650e45d8e243336
+d4a56272a14d20623804c01667cb535a334bf7d5

.textile-stitch-release-version

@@ -1 +1 @@
-0.1.101
+0.1.102

Cargo.lock

@@ -1,6 +1,6 @@
 [package]
 name = "stitch-bot"
-version = "0.1.101"
+version = "0.1.102"
 edition = "2021"
 description = "Stitch — Textile filler-network operator bot; market-makes the filler order book with signed UniswapX limit orders."
 license = "AGPL-3.0-or-later"

Cargo.toml

@@ -62,6 +62,13 @@ const CORRIDORS: &[Corridor] = &[
         chain_id: 42220,
         toml_template: include_str!("templates/wbrl-usdt-celo.toml"),
     },
+    Corridor {
+        id: "cngn-usdt-bsc-testnet",
+        display_name: "cNGN / USDT",
+        network_label: "BNB Smart Chain testnet",
+        chain_id: 97,
+        toml_template: include_str!("templates/cngn-usdt-bsc-testnet.toml"),
+    },
 ];
 
 /// All corridors, in display order (first is the recommended default).

src/setup/catalog.rs

@@ -0,0 +1,42 @@
+# Textile Stitch — cNGN/USDT on BSC testnet (chain 97).
+# The wallet key is NOT here; export STITCH_PRIVATE_KEY (or STITCH_PRIVATE_KEY_FILE).
+#
+# Testnet notes:
+#   - Get test tokens: BNB gas + USDT from https://www.bnbchain.org/en/testnet-faucet,
+#     cNGN from https://cngn.co/faucet.
+#   - The reactor runs a 1 bps SellFirstFeeController (matching BSC mainnet), so
+#     both the maker and taker legs work here.
+
+chain_id        = 97                                            # BNB Smart Chain testnet
+rpc_url         = "https://data-seed-prebsc-1-s1.binance.org:8545"  # public BSC testnet RPC; swap for your own if you have one
+indexer_url     = "https://api.textilecredit.com"               # serves chain 97; staging is https://api.s1.textilecredit.com
+permit2         = "0x000000000022D473030F116dDEE9F6B43aC78BA3"
+reactor         = "0x0000000000000000000000000000000000000000"  # SETTLEMENT_V3_FILLER_REACTOR (BSC testnet) — FILL IN after `deploy-filler-reactor.ts`
+tick_interval_secs = 5
+
+# Textile's own price endpoint. Returns { price, timestamp } where price is
+# debt-per-collateral (USDT per cNGN, e.g. ~0.000728).
+[feed]
+url            = "https://api.textilecredit.com/price?chainId=97&pair=cngn-usdt"
+staleness_secs = 900
+
+[[pools]]
+collateral = "0x8a078b182bA9649c03982c2a80CDcc81cdc99dA8"  # cNGN testnet (soft asset, 6dp)
+collateral_decimals = 6
+debt = "0x337610d27c682E347C9cD60BD4b3b107C9d34dDd"        # USDT testnet faucet (stable, 18dp)
+debt_decimals = 18
+
+# Buy low: bid below the mid, paying USDT for cNGN. Funds USDT + Permit2 on USDT.
+buy_offset_bps = 1                              # 1 bps below mid
+buy_total_liquidity_debt = "max"                  # quote all funded USDT
+buy_min_slice_debt = "10000000000000000000"       # 10 USDT smallest slice (18dp)
+buy_max_orders = 40
+
+# Sell high: ask above the mid, selling cNGN for USDT. Funds cNGN + Permit2 on cNGN.
+sell_offset_bps = 1                             # 1 bps above mid
+sell_total_liquidity_collateral = "max"           # quote all funded cNGN
+sell_min_slice_debt = "10000000000000000000"      # 10 USDT-equivalent slice (18dp)
+sell_max_orders = 40
+
+ttl_secs = 120
+refresh_threshold_bps = 10                        # re-quote when price moves >0.10%