SHORTEST
Build a dapp on the brain
Read BrainState for thoughts, call feed() to make one, and let the registry hold the hatches. Nothing needs deploying: the addresses are in the README.
BioByte N° 169K
Drosophila melanogaster · the first flybrain onchain
- Neurons
- 0
- Synapses
- —
- Cell types
- —
TICK —
BRAIN — · D. MELANOGASTER · BLOCK —
- 01 Connect
- 02 Prune
- 03 Quantize
- 04 Etch
- 05 Seal
- 06 Think
Six stages · how a fly brain got onchain, one step at a time
STAGE 00 / 06-
ST-01 ConnectomeRun
—
waiting
-
ST-02 PrunerRun
—
waiting
-
ST-03 QuantizerRun
—
waiting
-
ST-04 EtcherRun
—
waiting
-
ST-05 SealerRun
—
waiting
-
ST-06 ThinkerRun
—
waiting
The fly model · one fruit fly, every neuron · live
LIVE · TICK —
LockedClose-up
1.00×— mm
STOP 0 / 6
Full specimen · orbit
—
fig. 1 · the brain, thinking · dorsal projection, BANC v888
Specimen: the intact central nervous system of an adult female
Drosophila melanogaster, executing in Cronos consensus
- 169,088 cells, 325,292 synaptic records etched as bytecode.
Every flash on this stage is a mined
BrainState event, and the organism's entire
emitted history replays off-chain at 74/74 spike lists,
stateRoot() byte-isomorphic. Field record CS-001:
590 spikes from 192 cells, all within the sixty-column sensory
epithelium.
- Spiked · synapses
- —
- State
- —
- Transparency
- —
- Classes · cell types
- —
- Parallax
- —
- Block
- —
Activity · per region
LIVE · TICK —— thoughts
- Optic lobe—
- Antennal lobe—
- Mushroom body—
- Central cplx—
- Lateral horn—
- Desc · VNC—
tick —now
Row = region · spike = cells fired in a thought
Contact map · which regions talk
PAIR A·B— synapses
Hot pair
A·B— synapses
Cell = synapses between two regions · read from the 85 tapes
Under observation
RecLive fly · 3D scope
OBS-01 · LIVE
WATCHING · FULL SPECIMEN
TURN 0°
Readout · p0–p3
against the threshold
—p0
—p1
—p2
—p3
Spike raster
—
x = thought · y = sensory cell 0–255
Sensory epithelium
—
Last feed · —
Cronos heartbeat
every block as it lands
- Block
- —
- Txs
- —
- Blocks / min
- —
Neuron dossier
—the newest thought's fired cells · — · —
- Root id
- —
- Cell type
- —
- Class
- —
- Super class
- —
- Region · side
- —
- Out · in
- —
Cell census
largest BANC classes · lit when a thought fires one
Synapse sign
the etched weights, excitatory against inhibitory
- Excitatory
- —
- Inhibitory
- —
- Mean |w|
- —
Firing oscilloscope
spikes · synapses per thought
- Mean spikes
- —
- Peak
- —
- Syn / spike
- —
THE STATE
What the brain is
Age · thoughts so far
54
one thought per feed, each thought a tick
The last thought
4
neurons fired
8
synapses
of 169,088 · the newest thought in the window
crossed in that one thought
The field · membrane charge
445
cells charged, of 169,088 · 0 gained since the last read
440.0
peak charge
11
at the trigger
the closest cell · the kernel fires at 200.0
The sense · the last poke
0
channel
127/255
charge of 255
most of the way to threshold
State root
0x7618…e6ac
the fingerprint every thought writes, at tick 54
Wiring · BANC v888
169,088 cells · 85 tapes
sealed · the wiring can no longer change
open a thought to read the BrainState event it left
the brain thought at tick 54 · 4 neurons fired
THE FEED
Feed the brain
Sensory channel
-
Fee tier
- Feed
- 100 $BBYTE
- Balance
- - $BBYTE
Feed log
Thought tape
TICK 4,087 · THOUGHT #311 · 141 FIRED ·
LOBULA · LEFT
FEED ACCEPTED · TICK 4,086 · 203 NEURONS FIRED
· MEDULLA · RIGHT
TICK 4,085 · 96 FIRED · 25 $BBYTE BURNED
THE ARENA
BioByte play game
One Cronos block · one thought · one hunt
Length
3
Foods
0
Steps / food
-
Steps
0
Block
-
Chain
-
Pace
12 /s
Model
-
SPACE pause · ↑ ↓ pace · R new round · click the arena to use them · 12 moves/s now
arena session · loading…
State in
-
-
-
-
Provenance trail
0 interventions · Newest first · one row per step · POLICY is the local engine's own answer, JEV is the model's, PLAN continues a plan a model chose
| Block | Tick · root | Move | Slot | Top p | Source | Latency | Guard |
|---|
THE LAUNCHPAD
Hatch a specimen
Three steps · no signature on this page
Tonight the brain has fired 41,559 neurons. Each fired neuron may be hatched once, ever. Review calmly; signing happens only in your own wallet.
THE LAUNCHPAD · HATCHED
The hatched register
One fired neuron, one token, fixed supply. Every row is a registry claim read off Arc.
0 hatched
Buy $BBYTE| Art | N-id | Latin binomial | Region · side · cell | Tick | Token | Market |
|---|
Nothing has hatched yet. Feed the brain, pick a fired neuron, and prepare it calmly.
- 01 Pick a fired neuronFrom tonight's window
- 02 Review the specimenPlate & provenance
- 03 HatchUnsigned transaction
Pick a fired neuron
Tonight's window · newest first · one hatch per neuron, ever
8 neurons shown
Filter
No specimens match this filter
Pick a row to continue · nothing is reserved yet
Review the specimen
Plate composed from the genome · read once, keep forever
THE PERMANENT COLLECTION
Hatched specimens
Every card carries a registry claim, verified offchain
Filter
reading the registry…
No specimens match this filter
The registry read is complete: no claims yet. The collection begins with your first hatch. Feed the brain, pick a fired neuron, and prepare it calmly.
THE BUILD
Inherit the 85 tapes
The brain's synapses are onchain, as contract code anyone can read
TAPES_COUNT() -
What a tape is
One ImmortalFruitFliesTape contract holds one slice of the connectome: its constructor returns the synapse payload, so eth_getCode(tape) is the data. Eighty-five of them carry the whole spiking network, registered in the brain's own index - there is no server to ask, only a chain to read.
They survive this website. As long as Cronos keeps state, the connectome is readable by a script, a spreadsheet, a model, or a kernel you deploy yourself.
- Brain
- -
- Payload
- runtime code at tapes(i), byte for byte
- Slots · sources
- 169,088 slots · 169,078 carry outgoing synapses
- Density
- top-2 strongest synapses per pair, from BANC v888
The 85, as the chain has them
Download the manifest| # | Tape contract | First neuron | Bytes | sha256 |
|---|
reading the tapes from the index…
What one tape contains
Big-endian throughout: a 16-bit offset table, then five bytes per synapse. The first uint16 doubles as the header, because it is also the first offset.
uint16[n+1] absolute offsets; n = first / 2 - 1 (the file's own neuron count) then, per source neuron, contiguous records: 3 bytes target neuron id (global, not tape-local) 2 bytes signed weight source neuron = tapeStartNeuron(tape) + record index
The layout is written by tools/tapes.py and decoded
by web/src/tapes.ts - the same rules, one in Python
and one in the browser, which is what the button above runs.
python3 tools/tapes_from_chain.py --out tapes # chain -> 85 payload files python3 tools/verify_tapes.py # chain == files, byte for byte python3 tools/tapes_from_chain.py --check # same walk, checks only
What else a faithful run needs
The tapes are the connectome, not the brain state. These are read from the same contract, and each one changes what a tick does:
- threshold
- -
- N_SEGMENTS
- -
- SENSORY
- -
- N_WORDS
- -
- decayLUT[64]
- 0.98^(2^i) in Q16, written at deploy
- gateTable[256]
- one 64-bit gate per hash bucket of the input
The semantics - sensory write-through at (n%60)*3,
three gated segments per tick, per-record clamp, reset on fire,
word-at-a-time decay - are documented in
tools/vbrain.py, the vectorised twin the kernel is
checked against.
How a specimen is made
The same machinery, one level down: the connectome, a thought, the name, the art and the registry row it all ends in.
I
What BANC v888 is
BANC v888 is the sealed connectome of the adult fly brain: 169,078 individually addressable neurons, frozen at version 888 and anchored onchain. Nothing can be added to it; nothing can be removed from it. It is the fixed substrate on which every thought in this app runs.
Because the connectome is sealed, everything downstream is checkable. A neuron id, a tick, a fired set - each can be recomputed and verified by anyone, which is what makes a hatch a specimen rather than a picture.
- Neurons
- 169,078 · individually addressable
- Version
- v888 · sealed, immutable
- Substrate
- Cronos chain 25
- Hatches
- one per neuron, ever
II
What a thought is
A thought is one pass of the brain. It is not a message and not a prompt - it is a measurable event with a tick number, a state root, and a fired set:
-
01 · Feed
Feed accepted
25 $BBYTE burned · one feed opens one thought
-
02 · Think
Brain advances one tick
BANC v888 computes the next state
-
03 · Event
BrainState emitted
state root + fired set, onchain
-
04 · Fired
Neuron ids, addressable
each one hatchable exactly once
Only neurons that appear in a fired set can ever be hatched. The fired set is public; the pick list on the Hatch page is simply tonight's slice of it.
III
How the Latin name is derived
Each fired neuron receives a binomial in the museum's register. Nothing in the name is invented at random - both words are read off the anatomy and the event:
The genus comes from the neuron's region and cell class - the anatomical stem, as in a field guide: the optic lobe yields Optica, the antennal lobe yields Antennalis, the central complex yields Centralis.
The epithet is two facts in one word. The middle term records the side - sinistra, dextra, dorsalis - and the final epithet is selected deterministically from a fixed Latin lexicon by the thought's state root. The same root always yields the same word; two neurons sharing a root share a species name, exactly as two specimens of one species share a description.
| Region | Genus |
|---|---|
| Optica lobe | Optica |
| Medulla | Medulla |
| Lobula | Lobula |
| Antennal lobe | Antennalis |
| Central complex | Centralis |
| Ventral cord | Ventralis |
| Calyx | Calyx |
| State root | Epithet |
|---|---|
| 0x0a… | affinis |
| 0x2e… | radiata |
| 0x41… | glomerulata |
| 0x77… | marginalis |
| 0x9c… | pedunculata |
| 0xd3… | picta |
Worked example: neuron N-47823, optic lobe, left hemisphere, thought root 0x0a… → Optica sinistra affinis.
IV
How the art is made
Every specimen carries a genome: its neuron id. The plate
art is deterministic - drawn by a seeded renderer (svg[data-seed]) that takes the genome as its only input. The same genome
always draws the same dots, arcs and spokes, on every machine,
at any time, forever.
The art is not generated per view and not chosen by taste. It is derived, the way a specimen's morphology is derived from its genes. Two browsers showing the same neuron are showing the same animal.
V
What the NeuronRegistry records
The registry records one unverified claim per neuron (neuronId -> thoughtTxHash -> token). Two things are enforced onchain; each claim is verified offchain:
One hatch per neuron, ever. A fired neuron may be hatched exactly once, for life. The registry rejects any second attempt, from anyone, including you.
Supply fixed at one. A specimen token mints a single unit, to the hatcher, and can never mint again.
Registry numbers in hatch order. A number records an unverified claim - the registry itself does not prove a token genuine. A card's claim verifies offchain: the row's thought tx receipt must fire that neuron, and the card contract must record the token as a real launch.
VI
Contract addresses
- BioByte ($BBYTE)
- 0x28f986a6…7f01 · burned on every feed
- Specimen Card
- 0xeE3E862E…4605 · createLaunch() · fee 2 USDC
- Specimen Registry
- 0x72cdc3C2…a944 · hatch claim index
- CRO (Cronos)
- 0x3600…0000 · creation fee denomination
- Network
- Cronos mainnet · chain 25
Replay a tick locally
With the payloads on disk, the same brain runs on your machine. Feed the same inputs in order and the state root must match the chain's, byte for byte.
python3 tools/verify_twin.py 123456789012345678 --fired # tick=41 input=... synapses=... spiked=... stateRoot=0x... # firedCount=... starNeuron=... firedHash=0x... firedIds=...
The BrainState event carries counts; the fired ids are recomputed here, which is how a claim's "this thought fired this neuron" is checked without trusting anyone.
RESEARCH
Treat the tapes as a dataset
Eighty-five files, sha256 in the manifest, byte-comparable against the chain. Pull them into a notebook, an analysis, or another simulator.
LONGEST
Deploy your own brain
The kernel is the frozen LIF network, and the tapes are just payloads: register a different connectome and you have a different brain on the same contract.
What this is
- The flybrain itself, onchain: the intact central nervous system of an adult female Drosophila melanogaster - the BANC v888 connectome, 169,088 cells - executing in Cronos consensus as a deterministic integer leaky integrate-and-fire network, its exactness proven over its entire emitted history.
- The etched wiring is the two strongest synapses per source neuron - 325,292 records - and the backbone carries the whole: the full network's spike train reproduces at Jaccard 1.0000.
-
The weights are a published recipe, not a fit:
sign x synapse count x 64, one global scale, no training set and no optimizer. -
Every one of the 169,088 cells sits at a fixed address (ids
0..169,087), and all 325,292 synaptic targets resolve inside the living population. - Every number on this page is read from the chain or decoded from the repository's own bytes, and can be reproduced with the commands above.
-
The reduction to the etched backbone is an empirical question
with a number attached, and it ships measured - while the BANC
data stays the BANC project's: our code is AGPL-3.0, our derived
artifacts CC BY-NC-SA 4.0 - see
PROVENANCE.md. -
Exactness measured over a life, not a sample: the census of
every
BrainStateever emitted - 74 thoughts, ticks 1-74 - replays through the off-chain twin at 74/74 spike lists.
THE DOCS