Technical Specifications

Network Specifications

Chain Information

Parameter	Value	Description
Chain Name	OPN Chain	Official network name
Chain ID	984 (0x3d8)	EIP-155 chain identifier
Network ID	984	Network identifier
Native Token	OPN	Native currency
Token Decimals	18	Standard ERC-20 decimals
EVM Version	Pectra	Latest Ethereum features

Network Endpoints

Environment	RPC URL	WebSocket URL	Status
Testnet	https://testnet-rpc.iopn.tech	wss://testnet-ws.iopn.tech	✅ Active
Mainnet	https://rpc.iopn.tech	wss://ws.iopn.tech	🚧 Coming Soon

Block Specifications

Parameter	Value	Description
Target Block Time	1 second	Average block production time
Block Gas Limit	30,000,000	Maximum gas per block
Max Block Size	~2 MB	Approximate maximum block size
Empty Blocks	Allowed	Can produce empty blocks

Transaction Specifications

Parameter	Value	Description
Min Gas Price	7 Gwei (7 × 10⁹ wei)	Minimum transaction gas price
Gas Price Increment	0.1 Gwei	Minimum price increment
Max Transaction Size	128 KB	Maximum transaction data size
Transaction Timeout	20 blocks	Mempool expiration time
Max Gas per TX	30,000,000	Same as block limit

Consensus Specifications

Tendermint Parameters

Parameter	Value	Description
Consensus Algorithm	Tendermint BFT	Byzantine Fault Tolerant consensus
Block Proposer	Round-robin	Validator selection method
Voting Power	Stake-weighted	Based on staked tokens
Quorum	2/3 + 1	Required for consensus

Timing Parameters

Parameter	Value	Description
Timeout Propose	3000ms	Time for block proposal
Timeout Prevote	1000ms	Time for prevoting
Timeout Precommit	1000ms	Time for precommitting
Timeout Commit	1000ms	Time after commit
Skip Timeout Commit	false	Always wait full timeout

Validator Specifications

Parameter	Value	Description
Max Validators	100	Maximum active validator set
Min Self Delegation	1 OPN	Minimum self-stake
Unbonding Period	21 days	Time to unbond stake
Slash Fraction (Double Sign)	5%	Penalty for double signing
Slash Fraction (Downtime)	0.1%	Penalty for downtime
Min Signed Per Window	50%	Minimum uptime requirement

EVM Specifications

Compatibility

Feature	Support	Notes
EVM Version	Pectra	Latest Ethereum upgrades
Solidity	Up to Current	All versions supported
Vyper	✅	Full support
EIP-1559	✅	Base fee mechanism
EIP-2718	✅	Typed transactions
EIP-2930	✅	Access lists
EIP-7702	✅	EOA code (Pectra)

Gas Costs

Operation	Gas Cost	Notes
Transfer	21,000	Standard transfer
Contract Creation	32,000 + code	Base + deployment
SSTORE (new)	20,000	New storage slot
SSTORE (update)	5,000	Existing slot
SLOAD	2,100	Read storage
Memory (per word)	3	Memory expansion

Opcode Support

All standard EVM opcodes are supported, including:

Arithmetic Operations:

• ADD, MUL, SUB, DIV, SDIV, MOD, SMOD, ADDMOD, MULMOD, EXP, SIGNEXTEND

Comparison & Bitwise:

• LT, GT, SLT, SGT, EQ, ISZERO, AND, OR, XOR, NOT, BYTE, SHL, SHR, SAR

Environmental Information:

• ADDRESS, BALANCE, ORIGIN, CALLER, CALLVALUE, CALLDATALOAD, CALLDATASIZE, CALLDATACOPY, CODESIZE, CODECOPY, GASPRICE, EXTCODESIZE, EXTCODECOPY, EXTCODEHASH

Block Information:

• BLOCKHASH, COINBASE, TIMESTAMP, NUMBER, DIFFICULTY, GASLIMIT, CHAINID, SELFBALANCE, BASEFEE

Stack, Memory, Storage:

• POP, MLOAD, MSTORE, MSTORE8, SLOAD, SSTORE, JUMP, JUMPI, PC, MSIZE, GAS, JUMPDEST

Flow Operations:

• STOP, CREATE, CALL, CALLCODE, RETURN, DELEGATECALL, CREATE2, STATICCALL, REVERT, INVALID, SELFDESTRUCT

Precompiled Contracts

Address	Name	Gas Cost	Description
0x01	ECDSA Recovery	3000	Signature recovery
0x02	SHA256	60 + 12/word	SHA256 hashing
0x03	RIPEMD160	600 + 120/word	RIPEMD160 hashing
0x04	Identity	15 + 3/word	Data copy
0x05	ModExp	Variable	Modular exponentiation
0x06	ECAdd	150	Elliptic curve addition
0x07	ECMul	6000	Elliptic curve multiplication
0x08	ECPairing	Variable	Elliptic curve pairing
0x09	Blake2f	Variable	Blake2f compression

P2P Network Specifications

Network Parameters

Parameter	Value	Description
P2P Port	26656	Default P2P port
RPC Port	26657	Tendermint RPC
WS Port	26657	WebSocket endpoint
Max Peers	50	Maximum connections
Persistent Peers	10	Always connected
Seed Mode	Optional	Can run as seed

Message Types

Type	Size Limit	Description
Block	4 MB	Complete block data
Transaction	128 KB	Single transaction
Vote	1 KB	Consensus vote
BlockPart	64 KB	Block fragment

State & Storage Specifications

State Database

Parameter	Value	Description
DB Backend	LevelDB/RocksDB	Key-value store
State Pruning	Configurable	Keep recent states
History Retention	362,880 blocks	~100 hours
Snapshot Interval	1000 blocks	State sync points

Storage Requirements

Node Type	Storage	Growth Rate	Description
Archive Node	~Unknown	~Unknown	Full history
Full Node	~Unknown	~Unknown	Default pruning
Pruned Node	~Unknown	~Unknown	Aggressive pruning
Light Client	~Unknown	~Unknown	Headers only

API Specifications

JSON-RPC Methods

Supported Namespaces:

• web3_* - Web3 specific methods

• net_* - Network information

• eth_* - Ethereum compatible methods

• debug_* - Debug methods (optional)

• txpool_* - Transaction pool info

Rate Limits

Endpoint Type	Limit	Window	Description
Public RPC	100 req/s	1 second	Per IP address
Authenticated	1000 req/s	1 second	With API key
WebSocket	100 msg/s	1 second	Per connection
Archive Data	10 req/s	1 second	Historical queries

Response Times

Method Type	Target	Maximum	Description
Current State	< 50ms	100ms	Latest data
Recent Blocks	< 100ms	200ms	Last 1000 blocks
Historical	< 500ms	1000ms	Older data
Computation	< 1000ms	5000ms	Complex queries

Security Specifications

Cryptography

Algorithm	Usage	Parameters
ECDSA	Signatures	secp256k1 curve
Keccak-256	Hashing	Ethereum compatible
ED25519	Consensus	Tendermint signatures
SHA-256	Merkle trees	Block hashes

Network Security

Feature	Implementation	Description
DDoS Protection	Rate limiting	Per-IP limits
Sybil Resistance	Proof of Stake	Economic security
Message Authentication	Digital signatures	All messages signed
Transport Security	Optional TLS	For RPC/WS

Performance Specifications

Transaction Throughput

Metric	Value	Conditions
Simple Transfers	10,000+ TPS	21k gas each
ERC-20 Transfers	5,000+ TPS	~65k gas each
Complex DeFi	1,000+ TPS	~300k gas each
Peak Observed	15,000 TPS	Testnet maximum

Latency Specifications

Operation	Target	Maximum
Block Propagation	< 200ms	500ms
Transaction Confirmation	< 2s	5s
State Sync	< 10 min	30 min
RPC Response	< 50ms	100ms

Hardware Specifications

Minimum Requirements

Component	Specification	Notes
CPU	4 cores	Modern x86_64
RAM	16 GB	32 GB for RocksDB
Storage	500 GB SSD	NVMe preferred
Network	100 Mbps	1 Gbps recommended
OS	Linux/Unix	Ubuntu 20.04+

Recommended Specifications

Component	Specification	Notes
CPU	8+ cores	High frequency
RAM	32 GB	64 GB for archive
Storage	2 TB NVMe	RAID optional
Network	1 Gbps	Dedicated line
OS	Ubuntu 22.04	Latest LTS

Governance Specifications

Proposal Types

Type	Voting Period	Quorum	Threshold
Text	14 days	40%	50%
Parameter Change	14 days	40%	50%
Software Upgrade	14 days	40%	67%
Emergency	24 hours	67%	90%

Voting Power

• Based on staked OPN tokens

• 1 token = 1 vote

• Delegated stake counts

• No vote buying mechanisms

Future Specifications

Planned Upgrades

Feature	Target	Description
Account Abstraction	Q4 2025	EIP-4337 support
ZK Integration	2026	Privacy features

Compatibility Commitments

• Maintain full EVM compatibility

• Follow Ethereum upgrades

• Preserve API compatibility

• Support legacy contracts

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