Pump SDK Core — Instruction Building & On-Chain Interaction

Build, extend, and maintain the core Pump SDK — an offline-first TypeScript SDK that constructs Solana TransactionInstructions for token creation, buying, selling, migration, and creator fee collection across three on-chain programs (Pump, PumpAMM, PumpFees) plus the Mayhem program.

Context

The SDK is published as @8bitsats/pump-sdk (npm) and powers the Pump protocol — a Solana-based token launchpad with bonding curve pricing, automatic AMM migration after graduation, tiered fees, and creator fee sharing. The codebase uses Anchor for IDL-based instruction building and supports both Token (SPL) and Token-2022 token programs.

Key Files

• src/sdk.ts — PumpSdk class with all instruction builders and account decoders
• src/onlineSdk.ts — OnlinePumpSdk class extending offline SDK with live RPC fetches
• src/index.ts — barrel re-export module defining the public API surface
• src/state.ts — TypeScript interfaces for all on-chain account state
• src/pda.ts — Program Derived Address derivation for all programs
• src/idl/pump.ts, src/idl/pump_amm.ts, src/idl/pump_fees.ts — Anchor IDL definitions

Architecture