Client Configuration

Creating a Client

Use StrikeClient::new() with a config, then chain builder methods:

use strike_sdk::prelude::*;

// Mainnet with defaults
let client = StrikeClient::new(StrikeConfig::bsc_mainnet()).build()?;

// With a wallet for trading
let client = StrikeClient::new(StrikeConfig::bsc_mainnet())
    .with_private_key("0x...")
    .build()?;

Preset Configs

Method	Chain ID	Description
StrikeConfig::bsc_mainnet()	56	BSC mainnet with default RPC, WSS, and indexer URLs
StrikeConfig::bsc_testnet()	97	BSC testnet with default RPC, WSS, and indexer URLs
StrikeConfig::custom(addresses, chain_id)	any	Custom deployment

Each preset includes default RPC, WSS, and indexer endpoints. Override any of them with builder methods.

Builder Methods

let client = StrikeClient::new(StrikeConfig::bsc_mainnet())
    .with_rpc("https://your-rpc-node.com")       // override RPC endpoint
    .with_wss("wss://your-ws-node.com")           // override WSS endpoint
    .with_indexer("https://your-indexer.com")      // override indexer URL
    .with_private_key(&std::env::var("PRIVATE_KEY").unwrap())
    .build()?;

All builder methods are optional. A client built without with_private_key() is read-only — it can query markets, stream events, and read balances, but cannot send transactions.

Read-Only vs Trading Mode

Capability	Read-only	With wallet
Fetch markets, orderbook	Yes	Yes
Stream events	Yes	Yes
Read balances	Yes	Yes
Place/cancel orders	No	Yes
Approve USDT	No	Yes
Redeem tokens	No	Yes

Calling a write method without a wallet returns StrikeError::NoWallet.

Nonce Manager

For bots that send transactions in rapid succession, enable the nonce manager to avoid nonce-too-low errors:

let mut client = StrikeClient::new(StrikeConfig::bsc_mainnet())
    .with_private_key(&key)
    .build()?;

// Initialize the shared nonce tracker
client.init_nonce_sender().await?;

The NonceSender fetches the current nonce from the chain at init, then tracks it locally. It distinguishes between simple nonce drift and pending mempool conflicts:

• Nonce drift (for example nonce too low) → re-sync from chain and retry once

• Pending conflict (for example replacement transaction underpriced or already known) → re-sync from chain, but do not blindly retry into the same nonce lane

Enabled by the nonce-manager feature flag (on by default).

You generally don't need this for simple scripts — it's designed for bots that place and cancel orders in tight loops.

Accessing Internals

For advanced usage, you can access the underlying provider and config:

let provider = client.provider();      // &DynProvider — raw alloy provider
let config = client.config();           // &StrikeConfig — addresses and URLs
let addr = client.signer_address();     // Option<Address>
let block = client.block_number().await?;

Sub-Clients

The StrikeClient exposes domain-specific sub-clients:

Method	Returns	Description
client.orders()	OrdersClient	Place, cancel, replace orders
client.vault()	VaultClient	USDT approval and balance queries
client.tokens()	TokensClient	ERC-1155 outcome token operations
client.markets()	MarketsClient	On-chain market state reads
client.redeem()	RedeemClient	Post-resolution token redemption
client.events()	EventStream	WSS event subscription
client.indexer()	IndexerClient	REST indexer client

Error Handling

All SDK methods return strike_sdk::Result<T>, which is std::result::Result<T, StrikeError>.

use strike_sdk::prelude::*;

match client.orders().place(orderbook_market_id, &params).await {
    Ok(orders) => { /* success */ }
    Err(StrikeError::NoWallet) => { /* no private key configured */ }
    Err(StrikeError::Rpc(e)) => { /* RPC transport error */ }
    Err(StrikeError::Contract(msg)) => { /* on-chain revert */ }
    Err(e) => { /* other error */ }
}

StrikeError variants:

Variant	Cause
Rpc	Transport-level RPC failure
Contract	On-chain revert or ABI decoding error
NonceMismatch	Local nonce diverged from chain
MarketNotActive	Market ID is not active
InsufficientBalance	Not enough USDT or tokens
NoWallet	Write operation attempted without a private key
WebSocket	WSS connection error
Indexer	Indexer HTTP error
Config	Invalid configuration
Other	Catch-all via eyre::Report