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🌎 Neurai: The Next Step
The Neurai Testnet extends Neurai's scripting engine with a set of specialized opcodes.
The goal is concrete:
✅Scripts that inspect their own transaction and enforce spending rules at the consensus layer.
✅Native asset introspection: covenants that read asset names, amounts, and metadata directly.
✅External state via reference inputs: read on-chain oracle data without consuming it.
✅Implemented and running on testnet today.
🌍New Opcodes add more power
1⃣ Covenant Primitives: OP_CHECKTEMPLATEVERIFY locks a UTXO to an exact transaction template: outputs, amounts, and destinations are fixed at creation time. OP_CHECKSIGFROMSTACK verifies a signature against any arbitrary message on the stack, enabling scripts to consume oracle-signed data. Both support classical ECDSA and post-quantum ML-DSA-44 keys.
2⃣ Transaction Introspection:
Opcodes that push raw transaction data onto the stack: output amounts (OP_OUTPUTVALUE), output scripts (OP_OUTPUTSCRIPT), the spent UTXO's own script or value (OP_TXFIELD), locktime (OP_TXLOCKTIME), input/output counts, and configurable field hashes (OP_TXHASH). The building blocks for covenants that enforce transaction structure.
3⃣ Asset Introspection:
Neurai-native. OP_OUTPUTASSETFIELD and OP_INPUTASSETFIELD read asset fields directly from transaction inputs and outputs: name, amount, decimal units, reissuable flag, IPFS hash, type. Scripts can verify asset properties without parsing serialized data.
4⃣ Reference Input Introspection:
A new vrefin vector carries UTXOs that are read but not spent. OP_REFINPUTFIELD and OP_REFINPUTASSETFIELD expose their value, script, and asset fields to the script engine. Shared onchain state price feeds, device registries, rate limits readable by many transactions simultaneously without being consumed.
5⃣ Byte Manipulation:
OP_CAT (re-enabled) concatenates two stack elements. OP_SPLIT splits a byte array at a given position. OP_REVERSEBYTES reverses byte order. These are the primitives for constructing and parsing data structures on the stack.
6⃣64-Bit Arithmetic:
OP_MUL, OP_DIV, and OP_MOD are re-enabled and operate on 64-bit signed integers with overflow protection. Existing arithmetic opcodes (OP_ADD, OP_SUB, comparisons) are upgraded to the same domain. Required for any covenant that computes amounts, rates, or fees in script.
🌏Use Cases
1) Trustless Limit Order (DEX)
A seller locks ASSET_A in a covenant. Anyone can spend it, but only if the transaction sends the required ASSET_B back to the seller. Atomic swap enforced by consensus — no escrow, no platform.
2) Vault with Spending Cap
Withdrawals are capped at 1 XNA per transaction. The remainder must return to the same covenant. A stolen key can only drain 1 XNA per block. Cold recovery after a 144-block timelock.
3) Recurring Payment Stream
A UTXO funds a scheduled payout. Each settlement is only valid after the next time period, pays the exact defined amount, and returns the remainder to the same covenant. Anyone can trigger it. No operator needed.
4) Asset Reissuance Gate
An oracle signs off-chain approval data. The covenant verifies the signature, caps the reissue amount, and keeps the owner token locked. Supply increases require provable approval enforced by the script.
5) CTV Payout Tree
A single UTXO commits to a tree of future payouts. Each recipient claims their branch independently. Only claimed branches consume block space. No coordination required.
6) OracleFed Covenant via Ref Inputs
An oracle UTXO holds a price or state value. Contracts read it via vrefin without consuming it. The oracle persists and can be referenced by hundreds of transactions simultaneously.
7) IoT Sensor with Conditional Payment
A sensor signs its readings. The covenant verifies the signature, checks the device is registered against a reference input, computes payment from units × rate, and enforces the output. Bad data or unregistered devices, transaction fails.
8) Asset-Gated Encrypted Messaging (DePIN)
Only holders of a specific Neurai asset can query the message pool. Messages are encrypted per-recipient via hybrid ECIES. The access gate is a covenant, OP_INPUTASSETFIELD verifies asset ownership at the consensus layer. No server-side database decides who can read. Supports paginated retrieval for embedded hardware (ESP32 example included in the codebase).
⚛️PostQuantum Addresses
AuthScript supports ML-DSA-44 (FIPS 204) natively. Covenants using AuthType 0x01 require a post-quantum signature before executing. Any vault, order, or governance contract can be quantum-resistant today. Hash-based covenant logic is inherently quantum-resistant by design. When CSFS is active, the stack element cap extends to 3072 bytes to fit PQ keys in standard relay.
We are adding all of this and more to Neurai to make it more powerful and durable for years and decades to come.
Soon we will begin testing on Testnet to unlock the full potential of what we are deploying.
Spoiler:
The new upgrade is called: Positronic
#Neurai #XNA $XNA #PQ #IoT #DePIN #AI
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