FFORGE//RS
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blockchain / LEVEL 3

The transaction whose nonce advanced on failure

EST.40 MIN
01

THEORY / RETRIEVAL

What to restore

  • Enforce chain and exact account nonce
  • Check fee/value arithmetic and balance before mutation
  • Keep failed execution replayable and state-neutral

An account nonce orders authorization

Requiring the next exact nonce rejects replay and gives transactions from one account a deterministic order. It also creates mempool complications: future-nonce transactions wait for gaps, and replacement policy must identify the same sender/nonce slot.

Validation order is consensus behavior

All nodes must produce the same state transition for the same ordered input. Overflow, insufficient funds, wrong chain and wrong nonce must be handled deterministically without partially advancing account state.

CHECKPOINT

A transaction with the correct signature but an already-used account nonce arrives again. What is the generic safe result?

ISOLATED RUST 1.96
src/lib.rsEDIT

02 / DEBUGGING

Find and fix the defect

Repair apply_transaction. Check chain, exact nonce, amount+fee overflow, sufficient balance and nonce overflow before mutating the account. Every Err must leave the input Account unchanged.

Initializing editor…
CLOUD SANDBOXnetwork off · 256 MB · 12 s
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OUTPUT
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