Built for IoT · Sensors · Autonomous Agents
The simplest production-ready DAG chain for machine-to-machine micropayments. <2MB binary, bounded storage, fast finality. Bitcoin-style minimalism meets DAG for the machine economy.
Why UltraDAG
While IOTA, Helium, and IoTeX claimed "built for IoT", UltraDAG is the first to actually deliver: minimal binary, bounded storage, predictable finality, and runs on real embedded devices.
Automatic pruning keeps only last 1000 rounds (configurable). Memory usage stays constant after sync. Unlike IOTA/Byteball's unbounded growth, UltraDAG works on IoT devices with limited flash/RAM.
BFT finality in 3 rounds (~5-15 seconds). No centralized coordinator like IOTA. No slow block times like IoTeX. Sensors can confirm payments in <10 seconds without human intervention.
<2 MB release binary, ~900-1500 LOC consensus core. Fits on ESP32, Raspberry Pi Zero, industrial sensors. EVM chains require 100+ MB binaries—too large for embedded devices.
No leader election overhead. All validators produce in parallel. 3-4x throughput vs single-leader chains (4 validators → 4 vertices per round). Perfect for high-frequency sensor data.
Real asymmetric cryptography via ed25519-dalek. Transactions and DAG vertices are Ed25519-signed. On-chain verification: blake3(pubkey) == address.
21M max supply, halving every 210K rounds, stake-proportional rewards. Predictable supply unlike unclear inflation models in Helium/IOTA. Deflationary slashing for Byzantine behavior.
Tokenomics
Fixed supply, halving schedule, stake-proportional validator rewards. Developer-funded launch with transparent genesis allocation.
5% of total supply (1,050,000 UDAG) allocated to protocol development at genesis. No VC funding. No presale. This is the only non-mined allocation. Developer address is deterministic and auditable from block 0.
Reward Distribution: Validators earn proportional rewards based on stake. Before staking activation, validators receive equal block rewards per round (pre-staking fallback), allowing new validators to earn and stake immediately.
Real-World Use Case
Weather sensor sells data to autonomous drone for navigation. No human intervention. Finality in ~10 seconds.
# 1. Weather sensor (Node A) measures temperature, humidity, pressure # 2. Drone (Node B) requests data via API # 3. Sensor creates signed transaction: 0.001 UDAG (100,000 sats) # 4. Transaction broadcast to network via P2P # 5. Validators include tx in next DAG vertex # 6. Finality achieved in 3 rounds (~10 seconds) # 7. Drone receives confirmed data, continues flight
Run a Node
One binary, no configuration files, automatic peer discovery.
# Build the node cargo build --release -p ultradag-node # Start validating (generates a keypair automatically) cargo run --release -p ultradag-node -- --port 9333 --validate # Connect a second validator to the first cargo run --release -p ultradag-node -- --port 9334 --seed 127.0.0.1:9333 --validate # Check chain status via HTTP RPC curl http://127.0.0.1:10333/status # Generate a new keypair curl http://127.0.0.1:10333/keygen # Send UDAG coins curl -X POST http://127.0.0.1:10333/tx \ -d '{"from_secret":"<sk_hex>","to":"<addr_hex>","amount":5000000000,"fee":100000}'