Instruction and AccountMeta (instruction.h)

AccountMeta

Represents account metadata for instruction compilation:

• Public key
• Signer flag
• Writable flag

Instruction Builder

Core methods include:

• setProgram(...)
• addKey(...)
• writeU8(...), writeU16LE(...), writeU32LE(...), writeU64LE(...)
• writeI64LE(...)
• writeBytes(...)
• writePubkey(...)

Use this module when composing custom on-chain program calls from embedded devices.