HarvestBot

The ledger that books your losses — and refuses the rebuy.

zsh — harvestbotreal run · 27 Sep 2026

$ forge test
81 tests passed, 0 failed
$ cast call 0xEff7…5a21 computeHarvest…
[55, 54, 53, 52, 51, 50, 49, 48, 47]
-18321704

Arbitrum Open House Singapore · Robinhood Chain 46630HarvestBot · 01/12

Every December

Maya leaves ($3,140.00) of losses on paper.

Pick which of 64 tax lots to sell. Police a 30-day calendar. One wrong rebuy voids it.

seed scenario, proven by forge testHarvestBot · 02/12

The stock is on chain. The accounting isn't.

No cost-basis ledger

HIFO is unprovable.

No wash-sale wall

A rebuy voids the loss.

No safe delegate

Agents are unbounded.

HarvestBot · 03/12

One flow · three real transactions · one agent key

The agent signs. The contracts recompute.

Beat 1

Harvest

0x689c…6123

Beat 2

Refuse

0xd486…cf10

Beat 3

Slash

0x6b89…7dcb

Robinhood Chain testnet 46630HarvestBot · 04/12

Beat 1 · block 119,852,570

Nine lots, struck through.

Real AMZN → real NFLX. HIFO recomputed on the Stylus ledger.

Lot	Basis/sh	Gain/(loss)
63	455.00	(3.34)
62	453.81	(3.24)
61	452.62	(3.15)
60	451.43	(3.06)
59	450.24	(2.96)
58	449.05	(2.87)
57	447.86	(2.78)
56	446.67	(2.68)
55 part	445.48	(0.45)
Banked	($24.53)

LotsRealized · faucet scaleHarvestBot · 05/12

Beat 2 · 40 seconds later

The rebuy, refused by the contract.

WashSaleViolation(owner, AMZN, AMZN, 1792060681)

Walled · reverteduntil 15 Oct 2026

tx 0xd486…cf10 · status 0HarvestBot · 06/12

Beat 3 · off-map AMZN → PLTR

The rogue trade became evidence.

bond ~~1,000~~ → 800 mUSDC mock

challenge() · 20 bounty · 180 to the owner

Slashed event · tx 0x6b89…7dcbHarvestBot · 07/12

Stylus vs Solidity · L2 gas

2.87×

less at 64 lots. 3.1× at 128. Uncached: worst case.

161.96×

352,195

180,017

322.49×

720,431

289,013

642.87×

1,456,905

507,993

1283.1×

2,929,938

945,989

SolidityStylus

bench/RESULTS.md · NodeInterface.gasEstimateComponentsHarvestBot · 08/12

Smart-contract quality, measured

Checked before a judge opens it.

81

Foundry tests

6

Stylus native tests

0 · 0

Slither high · medium

100%

line coverage on src/

forge test · cargo test · docs/SLITHER.mdHarvestBot · 09/12

Why only Robinhood Chain + Stylus

Where the stock is issued.

Real assets

AMZN, NFLX, PLTR faucet Stock Tokens.

WASM ledger

stylusVersion() = 3

Labeled mocks

Oracle, venue, USDC. No testnet AMM.

deployments/46630.jsonHarvestBot · 10/12

Honest limits · JUDGE.md

“The oracle mark, the swap venue and the bond's USDC are MOCK contracts”

“Re-buys are walled for the 30 days after a harvest”

“The spec had guessed ~8×; the chain says 2.9×–3.1×”

verbatimHarvestBot · 11/12

No wallet · your browser · chain 46630

Don't take the deck's word. Ask the chain.

harvestbot.edycu.dev/verify

github.com/edycutjong/harvestbot

harvestbot.edycu.dev/judge · judge in 30 s

scan → live receipts