Crypto-fiat boundary

On-chain reconciliation, stablecoin reserves, hot / cold wallets, tax lots, failed-tx handling. Where chain truth meets ledger truth.

5 hands-on lessons in this topic. Read each one free, then practice it on a real double-entry ledger in the lab.

  1. Lesson 71

    On-chain ↔ off-chain reconciliation

    Your ledger says you hold 10 BTC. The blockchain says you hold 9.998. Which is right?

  2. Lesson 72

    Stablecoin reserve attestation

    Every USDC in circulation must have $1 backing it. The ledger proves it.

  3. Lesson 73

    Hot wallet, cold wallet: the custody split

    Same BTC. Different keys. Wildly different operational risk.

  4. Lesson 74

    Tax-lot tracking: FIFO vs LIFO vs HIFO

    You bought BTC at three different prices. Which 'cost basis' did you sell?

  5. Lesson 75

    Failed on-chain transactions: gas paid, value not moved

    Ethereum transactions can fail. The gas is gone. The user expects their balance back.

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