fix(synapse-e2e): support prepare piece sizes

[Kubuxu]

Summary

• pass both dataSize and pieceSizes to Synapse prepare calls for SDK 1.2 and master compatibility
• preserve the storage context in the plain ERC-20 preparation path
• rename helper parameters to pieceSize and mark dataSize for removal after SDK 1.2 support ends

[Copilot]

🟢 Approval recommended

The changes are small, localized to E2E helpers, and primarily adjust option-shaping for SDK compatibility with only minor naming clarity follow-ups.

Pull request overview

Updates the Synapse E2E scenario account-preparation helpers to be compatible with Synapse SDK variants that expect pieceSizes, while keeping backward compatibility by continuing to provide dataSize.

Changes:

• Pass both dataSize and pieceSizes to synapse.storage.prepare() for SDK 1.2 + master compatibility.
• Reuse a single options object for the initial and follow-up prepare() calls.
• Preserve context in the plain ERC-20 preparation path by including it in the reused options.

File summaries

File	Description
scenarios/synapse-e2e/account.ts	Updates storage account preparation helpers to send both dataSize and pieceSizes to storage.prepare(), including context in the plain ERC-20 path.

Review details

Suppressed comments (1)

scenarios/synapse-e2e/account.ts:109

• Same naming issue as above: pieceSize is passed through as dataSize and current usage passes file byte lengths (and even 1n in create-dataset.ts). Renaming the parameter to dataSize (or explicitly accepting both dataSize and pieceSize) would make the intent clearer and reduce the chance of mixing up padded piece sizes vs raw data sizes.

export async function prepareAccountWithPlainErc20(
  synapse: ScenarioSynapse,
  pieceSize: bigint,
  context: StorageContext
): Promise<AccountState> {
  const options = {
    context,
    // TODO: Remove dataSize after dropping Synapse SDK 1.2 compatibility.
    dataSize: pieceSize,
    pieceSizes: [pieceSize],
  }

• Files reviewed: 1/1 changed files
• Comments generated: 1
• Review effort level: Lite

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