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The Thru Core specification defines the fundamental data structures and primitives that form the foundation of the Thru blockchain. These components handle the basic building blocks of blockchain operations.

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Key Components

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Transactions

Atomic units of computation with detailed binary format specification. Includes transaction headers with fee payer and program information, account address lists (read-write and read-only), instruction data, and optional state proofs for fee payer accounts. Defines transaction validation criteria, signature verification, and account list ordering requirements.

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Thru Format (thrufmt)

Standard human-readable encoding format for Thru public addresses (ta…) and signatures (ts…). Documents the base64url encoding scheme, checksum algorithms, and CLI tools for converting between raw hex and the canonical string form. All clients must match the encoding behavior exactly, byte-for-byte.