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Foundations · easy

4. SOL and Lamports

Native token denominations and fractional precision.

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The native cryptocurrency of Solana is SOL. The smallest denomination is a Lamport, named after Leslie Lamport. 1 SOL equals 1,000,000,000 (10^9) lamports.

Amounts inside smart contracts are always represented as unsigned 64-bit integers (u64) of lamports.

How to study this topic

  1. 1. Read the explanation once end to end, skipping the code.
  2. 2. Re-read the code snippets and say out loud what each line does.
  3. 3. Answer the quiz without scrolling back — that is the real check.
  4. 4. Read every explanation, even for the answers you got right.

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Check your understanding

  1. 1. How many lamports are in 1 SOL?

  2. 2. What integer type is used in Rust for native lamport values?

  3. 3. Why avoid floating-point math for token calculations in programs?

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