sol-trade-sdk/examples/nonce_cache/README.md

Durable Nonce

中文

Shows how to fetch a durable nonce and attach it to a PumpFun transaction triggered by a sol-parser-sdk gRPC event.

This is a live-transaction template. Set PRIVATE_KEY, replace use_your_nonce_account_here, and configure RPC and gRPC before running. The nonce authority must match the signer.

export GRPC_ENDPOINT=https://your-yellowstone.example
export GRPC_AUTH_TOKEN=optional-token
cargo run --package nonce_cache

Do not set both a recent blockhash and a durable nonce in new code; use SimpleBuyParams::with_durable_nonce. Refresh nonce state immediately before construction, and never reuse consumed nonce state. A nonce extends transaction validity but does not preserve quote freshness.

See Nonce Cache.