Get PDA and Bump

The getPDAAndBump function gets a Program Derived Address (PDA) and its bump seed from a program address and seeds. It automatically handles encoding of different seed types.

Usage

const { pda, bump } = await connection.getPDAAndBump(programAddress, seeds);

Parameters

• programAddress: Address - The program address to derive the PDA from
• seeds: Array<String | Address | BigInt> - Array of seeds to derive the PDA. Can include:
  • Strings (encoded as UTF-8)
  • Addresses (encoded as base58)
  • BigInts (encoded as 8-byte little-endian)

Returns

Returns a Promise<{pda: Address, bump: number}> containing:

• pda: The derived program address
• bump: The bump seed used to derive the address

Example

const programAddress = "TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA" as Address;
const seeds = [
  "offer", // string seed
  aliceAddress, // address seed
  420n, // bigint seed
];
 
const { pda, bump } = await connection.getPDAAndBump(programAddress, seeds);
console.log("PDA:", pda.toString());
console.log("Bump seed:", bump);

Understanding PDAs

Program Derived Addresses (PDAs) are special addresses that are:

1. Derived deterministically from a set of seeds and a program address
2. Guaranteed to not have a corresponding private key
3. Can only be signed for by their owning program

Common uses for PDAs include:

• Creating deterministic addresses for program accounts
• Cross-Program Invocation (CPI) signing
• Organizing program data with predictable addresses