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Update eip-draft-returndata.md

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EIPS/eip-draft-returndata.md
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@ -22,7 +22,7 @@ Full nodes can provide RPCs to get a transaction return status and value by repl
Instead, we propose to replace the intermediate state root, already obsoleted by EIP98, with the return status (1 for success, 0 for failure). This both allows callers to determine success status, and remedies the previous omission of return data from the receipt. Instead, we propose to replace the intermediate state root, already obsoleted by EIP98, with the return status (1 for success, 0 for failure). This both allows callers to determine success status, and remedies the previous omission of return data from the receipt.
## Specification ## Specification
For blocks where block.number >= METROPOLIS_FORK_BLKNUM, the intermediate state root is replaced by a status code, a single byte with 0 indicating failure (due to any operation that can cause the transaction or top-level call to revert) and 1 indicating success. For blocks where block.number >= METROPOLIS_FORK_BLKNUM, the intermediate state root is replaced by a status code, 0 indicating failure (due to any operation that can cause the transaction or top-level call to revert) and 1 indicating success.
## Rationale ## Rationale
This constitutes a minimal possible change that permits fetching the success/failure state of transactions, preserving existing capabilities with minimum disruption or additional work for Metropolis. This constitutes a minimal possible change that permits fetching the success/failure state of transactions, preserving existing capabilities with minimum disruption or additional work for Metropolis.