Deployed Contracts

OBSDN's settlement layer is on-chain. The Obsdn contract is the entry point for deposits, withdrawals, and signer registration, and it's the EIP-712 verifying contract for signed orders.

Use the runtime endpoint as the source of truth

Call GET /chain/config to discover the live addresses for whichever network the API is bound to. The tables below are a snapshot; /chain/config stays in sync with deployments automatically.

Monad Testnet

https://api.obsdn.trade is currently bound to this network.

Testnet only

Do not deposit production funds. Mainnet is pending publication — see below.

Network

Field	Value
Chain ID	`10143`
Native currency	MON (18 decimals)
RPC	`https://testnet-rpc.monad.xyz`
Explorer	testnet.monadscan.com

Contracts

Contract	Address
`Obsdn`	`0x709fcaE0806870170b463B755A20cbF3A5ad0091`

Collateral assets

Listed via GET /assets. The addr field is the on-chain ERC-20 address; dec is the token's native decimals — use this when computing the ERC-20 approve amount in Getting Started — Step 4.

Asset	Address	Decimals	Min withdraw	Withdraw fee
USDC	`0x0F1c3B7a1598297F22A21AC2561Dea31b8037B2e`	`6`	`2`	`1`

Mainnet

Pending publication. GET /chain/config will return the mainnet configuration once the production deployment goes live.

Discover at runtime

curl https://api.obsdn.trade/chain/config

Sample response:

{
  "data": {
    "nm": "monad-testnet",
    "chain_id": 10143,
    "domain": {
      "nm": "Obsidian",
      "ver": "1",
      "chain_id": "10143",
      "verif_contract": "0x709fcaE0806870170b463B755A20cbF3A5ad0091"
    },
    "addrs": {
      "obsdn_contract": "0x709fcaE0806870170b463B755A20cbF3A5ad0091"
    },
    "native_ccy": { "dec": 18, "nm": "Testnet MON", "sym": "MON" },
    "rpc_urls": { "http": ["https://testnet-rpc.monad.xyz"] },
    "blk_explorer": { "nm": "Monad Explorer", "url": "https://testnet.monadscan.com" },
    "testnet": true
  },
  "request_id": "..."
}