# Stability Now

## [EIP-7495: SSZ StableContainer](https://eips.ethereum.org/EIPS/eip-7495)

<table>
<thead>
<tr>
<td rowspan="2"><strong>Lang</strong></td>
<td rowspan="2"><strong>Library</strong></td>
<td colspan="4"><strong>StableContainer[N]</strong></td>
<td colspan="4"><strong>Profile[B]</strong></td>
</tr>
<tr>
<td><strong>Enc</strong></td>
<td><strong>Dec</strong></td>
<td><strong>Root</strong></td>
<td><strong>Proof</strong></td>
<td><strong>Enc</strong></td>
<td><strong>Dec</strong></td>
<td><strong>Root</strong></td>
<td><strong>Proof</strong></td>
</tr>
</thead>
<tbody>
<tr>
<td>C#</td>
<td><a href="https://github.com/NethermindEth/nethermind/tree/master/src/Nethermind/Nethermind.Serialization.Ssz">Nethermind</a></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr>
<td>Go</td>
<td>Erigon (<a href="https://github.com/ledgerwatch/erigon/tree/main/erigon-lib/types/ssz">1</a> <a href="https://github.com/ledgerwatch/erigon/tree/main/cl/cltypes/solid">2</a> <a href="https://github.com/ledgerwatch/erigon/tree/main/cl/merkle_tree">3</a>)</td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr>
<td>Go</td>
<td><a href="https://github.com/prysmaticlabs/fastssz">FastSSZ</a></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr>
<td>Java</td>
<td><a href="https://github.com/Consensys/teku/tree/master/infrastructure/ssz">Teku</a></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr>
<td>Nim</td>
<td><a href="https://github.com/status-im/nim-ssz-serialization">nim-ssz-ser</a></td>
<td>✅</td>
<td>✅</td>
<td>✅</td>
<td>✅</td>
<td>✅</td>
<td>✅</td>
<td>✅</td>
<td>✅</td>
</tr>
<tr>
<td>Python</td>
<td><a href="https://github.com/protolambda/remerkleable">remerkleable</a></td>
<td>✅</td>
<td>✅</td>
<td>✅</td>
<td>✅</td>
<td>✅</td>
<td>✅</td>
<td>✅</td>
<td>✅</td>
</tr>
<tr>
<td>Rust</td>
<td><a href="https://github.com/sigp/ethereum_ssz">ethereum_ssz</a></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr>
<td>Rust</td>
<td><a href="https://github.com/grandinetech/grandine/tree/develop/ssz">Grandine</td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr>
<td>TS</td>
<td><a href="https://github.com/ChainSafe/ssz/pull/373">ChainSafe</a></td>
<td>✅</td>
<td>✅</td>
<td>✅</td>
<td>✅</td>
<td>✅</td>
<td>✅</td>
<td>✅</td>
<td>✅</td>
</tr>
</tbody>
</table>

**Tests:**

- [EIP-7495](https://github.com/ethereum/EIPs/blob/master/assets/eip-7495/tests.py)
- [EIP-6493](https://github.com/ethereum/EIPs/blob/master/assets/eip-6493/convert_tests.py)

**Usage:**

- [EIP-7688: Forward compatible consensus data structures](https://eips.ethereum.org/EIPS/eip-7688)
- CL:
- `Profile[B]` encoding / decoding (for libp2p networking and REST beacon-APIs)
- `Profile[B]` root (for `state_root` / `body_root` / `execution_payload_root` computation)
- `Profile[B]` proof (for `BlobSidecar` inclusion proofs)
- EL:
- no suppport needed
- [EIP-6493: SSZ Transaction Signature Scheme](https://eips.ethereum.org/EIPS/eip-6493)
- CL:
- `StableContainer[N]` encoding / decoding (for `transactions` list)
- `StableContainer[N]` root (for `ExecutionPayloadHeader` computation)
- no `Profile[B]` support needed (EL understands profiles but CL only forwards)
- EL:
- `StableContainer[N]` encoding / decoding (for SSZ transactions / receipts)
- `StableContainer[N]` root (for txhash / sighash computation)
- `StableContainer[N]` <-> `Profile[B]` conversion (for transactions)
- Proofs optional (for proving JSON-RPC lookups by root)
- Note that Snappy framed compression is also needed for libp2p / devp2p networking