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fix: malleable monero headers #104

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Sep 14, 2023
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fix: malleable monero headers #104

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20 changes: 11 additions & 9 deletions src/RFC-0120_Consensus.md
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Expand Up @@ -283,18 +283,19 @@ This is the nonce used in solving the Proof of Work.

The nonce MUST conform to the following:

* Must be transmitted as an unsigned 64-bit integer;
* MUST be transmitted as an unsigned 64-bit integer;
* for RandomX blocks, thus MUST be 0

#### PoW

This is the Proof of Work algorithm used to solve the Proof of Work. This is used in conjunction with the Nonce.

The [PoW] MUST contain the following:

* pow_algo as an enum (0 for Monero, 1 for Sha3).
* pow_data for Monero blocks as an array of unsigned 8-bit integers (bytes) in little-endian format, containing the Monero merge-mining Proof-of-Work data.
* the RandomX seed, stored as `randomx_key` within the Monero block, must have not been first seen in a block with confirmations more than `max_randomx_seed_height`.
* pow_data for Sha3 blocks must be empty.
* pow_algo as an enum (0 for RandomX, 1 for Sha3x).
* pow_data for RandomX blocks as an array of unsigned 8-bit integers (bytes) in little-endian format, containing the RandomX merge-mining Proof-of-Work data.
* the RandomX seed, stored as `randomx_key` within the RandomX block, must have not been first seen in a block with confirmations more than `max_randomx_seed_height`.
* pow_data for Sha3x blocks MUST be empty.

#### Difficulty Calculation
[target difficulty]: #target-difficulty "Target Difficulty"
Expand All @@ -311,8 +312,8 @@ $$
| Symbol | Value | Description |
|-------------------------|-------------------------|---------------------------------------------------------------------------------------------------------------------|
| N | 90 | Target difficulty block window |
| T | SHA3: 300 Monero: 200 | Target block time in seconds. The value used depends on the PoW algorithm being used. |
| \\( \solvetimemax \\) | SHA3: 1800 Monero: 1200 | Maximum solve time. This is six times the target time of the current PoW algorithm. |
| T | SHA3x: 300 RandomX: 200 | Target block time in seconds. The value used depends on the PoW algorithm being used. |
| \\( \solvetimemax \\) | SHA3x: 1800 RandomX: 1200 | Maximum solve time. This is six times the target time of the current PoW algorithm. |
| \\( \solvetime \\) | variable | The timestamp difference in seconds between block _i_ and _i - 1_ where \\( 1 \le \solvetime \le \solvetimemax \\) |
| \\( \mathrm{D_{avg}} \\)| variable | The average difficulty of the last _N_ blocks |

Expand All @@ -325,7 +326,7 @@ $$
\tag{2}
$$

It is important to note that the two proof of work algorithms are calculated _independently_. i.e., if the current block uses _SHA3_ proof of work, the block window and solve times only include _SHA3_ blocks and vice versa.
It is important to note that the two proof of work algorithms are calculated _independently_. i.e., if the current block uses _SHA3x_ proof of work, the block window and solve times only include _SHA3x_ blocks and vice versa.

### FTL
[FTL]: #ftl "Future Time Limit"
Expand All @@ -347,7 +348,7 @@ This is defined as the total accumulated proof of work done on the blockchain. T
rated at different difficulties. To compare them, we simply multiply them together into one number:
$$
\begin{align}
\textit{accumulated_monero_difficulty} * \textit{accumulated_sha_difficulty}
\textit{accumulated_randomx_difficulty} * \textit{accumulated_sha3x_difficulty}
\end{align}
\tag{3}
$$
Expand All @@ -373,6 +374,7 @@ done by the whole network, and verification of sorting is exceptionally cheap.
| 11 Oct 2022 | First stable | SWvHeerden|
| 13 Mar 2023 | Add mention of coinbase extra | SWvHeerden|
| 05 Jun 2023 | Add coinbase excess rule | SWvHeerden|
| 01 Aug 2023 | Add Randomx rule, fix Sha and Monero names | SWvHeerden|



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