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FyndClientBuilder

fynd_client

Struct FyndClientBuilder 

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pub struct FyndClientBuilder { /* private fields */ }
Expand description

Builder for FyndClient.

Call FyndClientBuilder::new with the Fynd RPC URL and an Ethereum JSON-RPC URL, configure optional settings, then call build to connect and return a ready client.

build performs two network calls: one to validate the RPC URL (fetching chain_id) and one to construct the HTTP provider. It does not connect to the Fynd API.

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impl FyndClientBuilder

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pub fn new(base_url: impl Into<String>, rpc_url: impl Into<String>) -> Self

Create a new builder.

  • base_url: Base URL of the Fynd RPC server (e.g. "https://rpc.fynd.exchange"). Must use http or https scheme.
  • rpc_url: Ethereum JSON-RPC endpoint for nonce/fee queries and receipt polling.
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pub fn with_timeout(self, timeout: Duration) -> Self

Set the HTTP request timeout for Fynd API calls (default: 30 s).

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pub fn with_retry(self, retry: RetryConfig) -> Self

Override the retry configuration (default: 3 attempts, 100 ms / 2 s back-off).

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pub fn with_submit_url(self, url: impl Into<String>) -> Self

Use a separate RPC URL for transaction submission and receipt polling.

If not set, the rpc_url passed to new is used for both.

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pub fn with_sender(self, sender: Address) -> Self

Set the default sender address used when SigningHints::sender is None.

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pub fn build_quote_only(self) -> Result<FyndClient, FyndError>

Build a FyndClient without connecting to an Ethereum RPC node.

Suitable for FyndClient::quote and FyndClient::health calls only. FyndClient::swap_payload and FyndClient::execute_swap require a live RPC URL and will fail if called on a client built this way.

Returns FyndError::Config if base_url is invalid.

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pub async fn build(self) -> Result<FyndClient, FyndError>

Connect to the Ethereum RPC node and build the FyndClient.

Validates the URLs and fetches the chain ID. Returns FyndError::Config if any URL is invalid or the chain ID cannot be fetched.

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