Mona

CU-optimized on-chain Solana router.

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                                          o88%8888888.
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                                       d8.-=. ,==-.:888b
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                                       88         ,88888
                                       88b. `-~  ':88888
                                       888b ~==~ .:88888
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                                      d888           ,%888b.
                                     d88%            %%%8--'-.
                                    /88:.__ ,       _%-' ---  -
                                        '''::===..-'   =  --.

The program hasn't been audited. Use at your own risk.

Deployment address: FiCPMBXAsryUHu3Cf89YQ3cXcnACX7e7ybn1hip5HT6P

The router supports two modes of execution:

• chained: output of hop N feeds as amount_in to hop N+1, single slippage check at end.
• split: each hop reads its own amount_in, per-step slippage check on output delta.

List of supported programs:

• AlphaQ
• Aquifer
• BisonFi
• HumidiFi
• Obric
• Scorch
• SolFi
• Tessera
• ZeroFi

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CU benchmarks between Mona, Jupiter and direct (non-router) program hit:

market	direct	mona	jup
alphaq	30,047	32,413	36,894
aquifer	74,069	79,924	80,183
bisonfi	69,748	71,968	76,656
goonfi	—	—	87,703
humidifi	41,194	47,342	52,723
obric	54,406	56,813	61,111
scorch	TODO	TODO	TODO
solfi	82,616	90,086	99,717
tessera	—	63,198	79,376
zerofi	34,734	37,238	41,910

swaps done at slot: 413,144,803

Simulation time comparison (single-hop sim_tx) ran on a Macbook M4 Pro:

---

The routing relies on a flat account layout, each adapter owns its full account slice.

Overview of the expected Instruction data:

   selector=0x01 (swap_v1)                    selector=0x01 (swap_v1)
   flags=0x01 (chained)                       flags=0x02 (split)
   ─────────────────────────────────          ─────────────────────────────────
   ┌──────────────────────┐                   ┌──────────────────────┐
   │ flags           (1B) │                   │ flags           (1B) │
   │ amount_in       (8B) │                   │ num_steps       (1B) │
   │ amount_out_min  (8B) │                   ├──────────────────────┤
   │ num_steps       (1B) │                   │ step[0].dex     (1B) │
   ├──────────────────────┤                   │ step[0].a_to_b  (1B) │
   │ step[0].dex     (1B) │                   │ step[0].amt_in  (8B) │
   │ step[0].a_to_b  (1B) │                   │ step[0].out_min (8B) │
   │ ...                  │                   │ ...                  │
   └──────────────────────┘                   └──────────────────────┘
   header: 18B, step: 2B each                 header: 2B, step: 18B each

   accounts:
   ┌──────────────────────────────────────────────┐
   │ [0]  payer (signer, writable)                │
   │ [1..N₀]  hop 0 remaining accounts            │ ← dex knows its own slice width
   │ [N₀..N₁] hop 1 remaining accounts            │   (mints, user TAs, vaults, etc.
   │ ...                                          │    all packed per-adapter)
   └──────────────────────────────────────────────┘

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LICENSE: MIT