fix(learning-examples): repair crashing listeners and decoders, prune obsolete paths, unify naming (#181)

Audited every script in learning-examples/ against mainnet.

Broken — found by running them, all invisible offline:

- listen_geyser.py crashed with IndexError after ~11 coins: it never resolved
  v0 address-lookup-table accounts, which geyser reports in
  meta.loaded_writable_addresses / loaded_readonly_addresses. Resolving them
  removes the crash and brings detections level with the WebSocket listeners,
  35 coins each per 150 s.
- compare_listeners.py logged 13,090,862 error lines / 888 MB in 150 s and never
  printed its own 30-second report: the inner recv() loop caught ConnectionClosed
  in a broad handler that only logged, so every following recv() raised at once
  and the outer reconnect handler was unreachable. Now 12 KB and exit 0. Same
  shape fixed in compare_migration_listeners.py, listen_blocksubscribe.py and
  extract_blocksubscribe_transactions.py; the last two also gained the reconnect
  loop their siblings already had.
- decode_from_gettransaction.py matched instructions on account count instead of
  discriminator, reporting a real 19-account create_v2 as claim_cashback with
  every account under the wrong name. It also walked only top-level
  instructions, and in 40 consecutive pump.fun transactions there was 1
  top-level pump instruction against 8 inner ones.
- decode_from_blocksubscribe.py crashed on every real create_v2: on chain the
  trailing args are variable length, 0001 in one tx and 00 in another, so
  is_cashback_enabled can be absent entirely.
- poll_bonding_curve_progress.py polled a hardcoded dead mint and took no argv.

Obsolete:

- Delete listen_blocksubscribe_old_raydium.py. Seven minutes on mainnet produced
  0 initialize2 events while the wrapper listener caught 3 real migrations.
- Delete the duplicate geyser stubs and protos under listen-new-tokens/. The
  protos were byte-identical to src/geyser/proto and the stubs had drifted; both
  geyser examples now import src.geyser.generated.
- Recapture all four fixtures. The old ones were from Aug 2024 and included a
  49-byte pre-creator bonding curve.

Behind the protocol:

- fetch_price.py, get_bonding_curve_status.py, poll_bonding_curve_progress.py
  and decode_from_getaccountinfo.py never read quote_mint and scaled by a
  hardcoded 1e9. Against a live USDC-paired curve the price was off by 1000x.
- get_pumpswap_pools.py stopped parsing at coin_creator and missed the i128
  virtual_quote_reserves. Live pools carry 17.5845 SOL of them, which
  under-prices by 3.5-23.9% when ignored.

Duplication and naming:

- Merge manual_buy_cu_optimized.py into manual_buy.py --cu-optimized. The
  deleted file's docstring said 512 KB while its code used 16 MB; simulation
  confirms 512 KB and 4 MB both fail MaxLoadedAccountsDataSizeExceeded on
  Token-2022 mints, so 16 MB is the correct value.
- Merge listen_logsubscribe_abc.py into listen_logsubscribe.py. Its ATA
  derivation hardcoded the legacy token program, so every Associated BC it
  printed for a Token2022 coin was an address that does not exist on chain.
  Fixed on merge and cross-checked 59/59 against on-chain accounts.
- Remove 19 dead symbols. BREAKING_FEE_RECIPIENTS is still live in the PumpSwap
  scripts and stays there.
- Normalize naming: kebab-case directories, RPC method names as one lowercase
  token, scripts verb-first. Rules documented in CLAUDE.md.

get_graduating_tokens.py is knowingly left broken: getProgramAccounts over the
whole pump program is now rejected by providers and it needs a
getProgramAccountsV2 rewrite, which belongs in its own PR.

Verified: both offline gates pass, all 41 examples parse, every read-only script
exercised on mainnet against SOL- and USDC-paired coins, no new ruff findings
(427 -> 413). No script that spends real funds was run.

Co-authored-by: Claude Opus 5 (1M context) <noreply@anthropic.com>

learning-examples/pumpswap/get_pumpswap_pools.py

@@ -53,6 +53,9 @@ async def get_market_data(market_address: Pubkey):
         parsed_data = {}
 
         offset = 8
+        # Fields end at 261; live pool accounts are 301 bytes with trailing padding.
+        # virtual_quote_reserves is an i128, not a u64 — reading only 8 bytes happens
+        # to work while the high half is zero, and silently breaks when it isn't.
         fields = [
             ("pool_bump", "u8"),
             ("index", "u16"),
@@ -64,6 +67,9 @@ async def get_market_data(market_address: Pubkey):
             ("pool_quote_token_account", "pubkey"),
             ("lp_supply", "u64"),
             ("coin_creator", "pubkey"),
+            ("is_mayhem_mode", "bool"),
+            ("is_cashback_coin", "bool"),
+            ("virtual_quote_reserves", "i128"),
         ]
 
         for field_name, field_type in fields:
@@ -79,6 +85,14 @@ async def get_market_data(market_address: Pubkey):
                 )
                 parsed_data[field_name] = value
                 offset += 8
+            elif field_type == "i128":
+                if len(data) < offset + 16:
+                    parsed_data[field_name] = 0
+                    continue
+                parsed_data[field_name] = int.from_bytes(
+                    data[offset : offset + 16], "little", signed=True
+                )
+                offset += 16
             elif field_type == "u16":
                 value = struct.unpack("<H", data[offset : offset + 2])[0]
                 parsed_data[field_name] = value
@@ -87,6 +101,11 @@ async def get_market_data(market_address: Pubkey):
                 value = data[offset]
                 parsed_data[field_name] = value
                 offset += 1
+            elif field_type == "bool":
+                parsed_data[field_name] = (
+                    bool(data[offset]) if len(data) > offset else False
+                )
+                offset += 1
 
         return parsed_data
 
@@ -98,7 +117,19 @@ async def main():
     print(market_address)
 
     market_data = await get_market_data(market_address)
-    print(market_data)
+    for key, value in market_data.items():
+        print(f"  {key}: {value}")
+
+    # Quote against effective reserves. Upstream's release note says
+    # virtual_quote_reserves is 0 on all pools; that is out of date — pools carry
+    # 17.5845 SOL of virtual reserves, so quoting off the raw vault balance
+    # under-prices by anywhere from a few percent to over 20%.
+    virtual = market_data.get("virtual_quote_reserves", 0)
+    if virtual:
+        print(
+            f"\nNote: this pool carries {virtual / 1e9:.9f} SOL of virtual quote "
+            "reserves. Add them to pool_quote_token_account.amount before quoting."
+        )
 
 
 if __name__ == "__main__":