feat(pumpfun): runtime V2 flag, buyback fee pool fix, legacy ix encoding

- Replace compile-time `pumpfun-v2` feature flag with runtime
  `TradeConfig::use_pumpfun_v2(bool)` for flexible V1/V2 switching
- Fix BUYBACK_FEE_RECIPIENTS pool: replace wrong addresses (was reusing
  standard pool + FEE_CONFIG) with official buyback pool from
  FEE_RECIPIENTS.md
- Fix legacy buy/buy_exact_sol_in ix data encoding: use 2-byte
  Option<bool> (option tag + value) matching official Pump SDK, 26 bytes
  total instead of broken 25
- Add `SwapParams.use_pumpfun_v2` field and wire through TradingClient
  buy/sell paths
- V2 instructions read `quote_mint` from `PumpFunParams` (not
  BondingCurveAccount which lacks the field)
- Fix `fetch_bonding_curve_account` to use BorshDeserialize instead of
  non-existent `decode_from_chain_account_data`
- Update all examples with `use_pumpfun_v2: false` field
- Update README with unified V1/V2 section showing both enabling methods

This commit is contained in:

0xfnzero

2026-05-09 07:15:07 +08:00

parent 0311a0b876

commit 1cc051a874

21 changed files with 841 additions and 513 deletions

									
										examples/nonce_cache/src/main.rs
									
		+1
		
												View File
												
				@@ -172,6 +172,7 @@ async fn pumpfun_copy_trade_with_grpc(

				        gas_fee_strategy: gas_fee_strategy.clone(),

				        simulate: false,

				        use_exact_sol_amount: None,

				            use_pumpfun_v2: false,

				        grpc_recv_us: None,

				    };

				    client.buy(buy_params).await?;