Multi-Chain Reference

Monolythium is deployed across multiple EVM and Cosmos EVM chains. This page provides a complete reference for every supported network, including RPC endpoints, chain IDs, explorers, deployed contract status, and chain-specific considerations for developers.

Chain Overview

Monolythium Native Chains

Chain	EVM Chain ID	Cosmos Chain ID	RPC (EVM)	Explorer	Status
Testnet	6940	mono_6940-1	https://evm.testnet.mononodes.xyz	Monoscan	Testnet

Pure EVM Chains

Chain	EVM Chain ID	RPC	Explorer	Status
Avalanche	43114	https://api.avax.network/ext/bc/C/rpc	Snowtrace	Mainnet
Avalanche Fuji	43113	https://api.avax-test.network/ext/bc/C/rpc	Snowtrace Testnet	Testnet
Linea	59144	https://rpc.linea.build	Lineascan	Mainnet
Linea Sepolia	59141	https://rpc.sepolia.linea.build	Lineascan Sepolia	Testnet

Cosmos EVM Chains (Ethermint)

Chain	EVM Chain ID	Cosmos Chain ID	RPC (EVM)	Explorer	Status
Sei	1329	pacific-1	https://evm-rpc.sei-apis.com	Seiscan	Mainnet
Sei Testnet	1328	atlantic-2	https://evm-rpc-testnet.sei-apis.com	Seiscan Testnet	Testnet
Cronos	25	cronosmainnet_25-1	https://evm.cronos.org	Cronos Explorer	Mainnet
Cronos Testnet	338	cronostestnet_338-3	https://evm-t3.cronos.org	Cronos Explorer Testnet	Testnet
Kava	2222	kava_2222-10	https://evm.kava.io	Kavascan	Mainnet
Kava Testnet	2221	kava_2221-16000	https://evm.testnet.kava.io	Kavascan Testnet	Testnet
Injective	1776	injective-1	https://sentry.evm-rpc.injective.network/	Blockscout	Mainnet
Injective Testnet	1439	injective-888	https://k8s.testnet.json-rpc.injective.network/	Blockscout Testnet	Testnet

Pure Cosmos Chains

Chain	Cosmos Chain ID	Cosmos RPC	Cosmos REST	Explorer	Status
Cosmos Hub	cosmoshub-4	https://rpc.cosmos.network:443	https://rest.cosmos.network	Mintscan	Mainnet
Osmosis	osmosis-1	https://rpc.osmosis.zone:443	https://lcd.osmosis.zone	Mintscan	Mainnet

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Contract Deployment Status

Monolythium protocol contracts are actively deployed on the native testnet. External chain deployments from the earlier Sprintnet development phase are currently stale and will be redeployed when multi-chain support is reactivated.

Chain	Status	Contracts
Testnet (6940)	Active	Full suite: MonoPump, FeeCollector, Referral, AgentRegistry, AgentLaunchpad, ProAccess, MonoSwap DEX (Factory, Router, TWAPOracle, LPFarming)
External EVM chains	Stale	Previous Sprintnet-era deployments on Avalanche Fuji, Linea Sepolia, Sei, Cronos, Kava, and Injective testnets are no longer maintained. Redeployment planned for a future milestone.
Mainnets	Planned	Pending testnet validation and audit

See Contract Addresses for current testnet deployment addresses.

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Chain-Specific Notes

Testnet (6940)

Testnet is the primary Monolythium testnet and the most fully-featured deployment. It is a Cosmos EVM chain running LythiumBFT.

• Native token: LYTH (base denom: alyth, 18 decimals)
• Bech32 prefix: mono
• AMM: Full native DEX (MonoFactory, MonoRouter, TWAPOracle, LPFarming)
• Explorer URL format: testnet.monoscan.xyz/tx/{hash} and /address/{addr} (no /evm/ or /token/ prefix)
• Cosmos endpoints: RPC at rpc.testnet.mononodes.xyz, REST at api.testnet.mononodes.xyz
• Staking: 3-day unbonding period, up to 53 validators

Avalanche / Avalanche Fuji

Pure EVM chain. Standard Ethereum tooling works without modification.

• Native token: AVAX (18 decimals)
• Gas price: ~25 gwei (Fuji testnet)
• DEX integration: Trader Joe
• EIP-1559: Supported
• Foundry: Standard forge script broadcast works

Linea / Linea Sepolia

Pure EVM chain. zkEVM-based L2 on Ethereum.

• Native token: ETH (18 decimals)
• Gas price: ~1 gwei
• DEX integration: SyncSwap
• EIP-1559: Supported
• Foundry: Standard forge script broadcast works

Sei (1329 / 1328)

Cosmos EVM (Ethermint) chain. Requires special handling for contract deployment.

• Native token: SEI (base denom: usei, 6 decimals)
• Bech32 prefix: sei
• Key algorithm: EthSecp256k1
• DEX integration: DragonSwap
• Deployment: forge script broadcast fails with NotActivated error due to Ethermint eth_call simulation issues. Use cast send --create with explicit --gas-limit for contract deployment, or use web3.py.
• Transaction flags: Always use --legacy (no EIP-1559 support)
• EVM version: Use evm_version = "paris" in foundry.toml to avoid the PUSH0 opcode
• Staking: 21-day unbonding, up to 150 validators

Cronos (25 / 338)

Cosmos EVM (Ethermint) chain. Notable for high gas prices on testnet.

• Native token: CRO (base denom: basecro, 18 decimals)
• Bech32 prefix: crc (mainnet), tcrc (testnet)
• Key algorithm: EthSecp256k1
• DEX integration: VVS Finance
• Gas price: Very high (~386 gwei on testnet). Simple contract deployment costs ~0.17 tCRO. Token creation costs ~1.16 tCRO. Always check balance before deploying.
• Transaction flags: Always use --legacy
• EVM version: Use evm_version = "paris"
• Staking: 28-day unbonding, up to 100 validators

Kava (2222 / 2221)

Cosmos EVM (Ethermint) chain.

• Native token: KAVA (base denom: ukava, 6 decimals)
• Bech32 prefix: kava
• Key algorithm: EthSecp256k1
• DEX integration: Kinetix
• Transaction flags: Always use --legacy
• EVM version: Use evm_version = "paris"
• Staking: 21-day unbonding, up to 100 validators

Injective (1776 / 1439)

Cosmos EVM (Ethermint) chain.

• Native token: INJ (base denom: inj, 18 decimals)
• Bech32 prefix: inj
• Key algorithm: EthSecp256k1
• DEX integration: No established EVM DEX; Uniswap V2 fork deployment planned
• Transaction flags: Always use --legacy
• EVM version: Use evm_version = "paris"
• Staking: 21-day unbonding, up to 150 validators

Cosmos Hub

Standard Cosmos SDK chain. No EVM support. Used for IBC and staking only.

• Native token: ATOM (base denom: uatom, 6 decimals)
• Bech32 prefix: cosmos
• Key algorithm: Secp256k1 (coin type 118)
• HD path: m/44'/118'/0'/0/0
• Features: Staking, IBC
• Staking: 21-day unbonding, up to 180 validators

Osmosis

Standard Cosmos SDK chain. No EVM support. Has a native DEX.

• Native token: OSMO (base denom: uosmo, 6 decimals)
• Bech32 prefix: osmo
• Key algorithm: Secp256k1 (coin type 118)
• HD path: m/44'/118'/0'/0/0
• Features: Staking, IBC, native DEX
• Staking: 14-day unbonding, up to 150 validators

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Contract Deployment Considerations

Ethermint Chains (Sei, Cronos, Kava, Injective)

All Ethermint-based chains share similar deployment quirks:

1. Forge script simulation fails. The forge script --broadcast command will fail with a NotActivated error because Ethermint's eth_call implementation does not fully support Foundry's local simulation. The eth_call via RPC works fine for read calls -- it is specifically the local simulation step that fails.

2. Workaround options:

   • Use cast send --create with an explicit --gas-limit for deploying contracts
   • Use web3.py for programmatic deployment
   • Use forge create (single-contract deployment, no scripting)

3. Always use the --legacy flag. Ethermint chains do not support EIP-1559 (type-2) transactions. All transaction submissions must use legacy (type-0) transactions.

4. Set evm_version = "paris" in foundry.toml. The PUSH0 opcode (introduced in the Shanghai EVM upgrade) is not supported on Ethermint chains. Setting the EVM version to Paris avoids generating PUSH0 in compiled bytecode.

   [profile.default]
   evm_version = "paris"

5. cast send transport errors. The cast send command intermittently fails with "Socket operation on non-socket (os error 38)", especially after parallel forge/cast calls. Retry the command or use web3.py as an alternative.

Pure EVM Chains (Avalanche, Linea)

Standard EVM tooling works without modification:

• forge script --broadcast works as expected
• EIP-1559 transactions are supported
• No special EVM version restrictions (Shanghai/Cancun opcodes are available)

Gas Price Differences

Gas costs vary significantly across chains. Below are approximate values observed on testnets:

Chain	Typical Gas Price	Simple Deploy Cost	Notes
Testnet	~10 Mwei	Low	Native LYTH gas
Avalanche Fuji	~25 gwei	Low	Standard EVM
Linea Sepolia	~1 gwei	Very low	L2 pricing
Sei Testnet	~10 Mwei	Low	Ethermint
Cronos Testnet	~386 gwei	~0.17 tCRO	Notably high
Kava Testnet	~1 gwei	Low	Ethermint
Injective Testnet	~500 Mwei	Low	Ethermint

Foundry Configuration

For multi-chain development with Foundry, use separate profiles or RPC aliases in foundry.toml:

[profile.default]
solidity_version = "0.8.20"
evm_version = "paris"

[rpc_endpoints]
testnet = "https://evm.testnet.mononodes.xyz"
avalanche_fuji = "https://api.avax-test.network/ext/bc/C/rpc"
linea_sepolia = "https://rpc.sepolia.linea.build"
sei_testnet = "https://evm-rpc-testnet.sei-apis.com"
cronos_testnet = "https://evm-t3.cronos.org"
kava_testnet = "https://evm.testnet.kava.io"
injective_testnet = "https://k8s.testnet.json-rpc.injective.network/"

Indexer Multi-Chain Configuration

The Monolythium indexer supports indexing multiple chains simultaneously. Set the CHAINS environment variable to a comma-separated list of EVM chain IDs:

CHAINS=6940,43113,59141

Without this variable, the indexer defaults to Testnet only (chain ID 6940). Each chain gets its own RPC client, known-pairs cache, and per-chain checkpoints.

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Native Token Reference

Chain	Display	Base Denom	Decimals	Wrapped Address (Testnet)
Testnet	LYTH	alyth	18	0xb5dadb197e9b07cd276403f9637308407b7e01f9
Avalanche	AVAX	wei	18	0xd00ae08403B9bbb9124bB305C09058E32C39A48c (Fuji)
Linea	ETH	wei	18	0x2C1b868d6596a18e32E61B901E4060C872647b6C (Sepolia)
Sei	SEI	usei	6	0xF8EB55EC97B59d91fe9E91A1d61147e0d2A7b6F7 (Testnet)
Cronos	CRO	basecro	18	0x6a3173618859C7cd40fAF6921b5E9eB6A76f1fD4 (Testnet)
Kava	KAVA	ukava	6	0x70C79B608aBBC502c2F61f38E04190fB407BefCF (Testnet)
Injective	INJ	inj	18	0x0000000088827d2d103ee2d9A6b781773AE03FfB (Testnet)
Cosmos Hub	ATOM	uatom	6	--
Osmosis	OSMO	uosmo	6	--

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Key Derivation

All Ethermint chains (including Testnet) use the Ethereum derivation path with EthSecp256k1:

Coin type: 60
HD path:   m/44'/60'/0'/0/0
Algorithm: EthSecp256k1

Standard Cosmos chains (Cosmos Hub, Osmosis) use the Cosmos derivation path with Secp256k1:

Coin type: 118
HD path:   m/44'/118'/0'/0/0
Algorithm: Secp256k1