fix signing payloads > 256 bytes

[clangenb]

Closes #418

[codecov[bot]]

Codecov Report

Attention: 3 lines in your changes are missing coverage. Please review.

Comparison is base (653d39a) 48.85% compared to head (ba547c6) 48.84%. Report is 6 commits behind head on main.

Additional details and impacted files

[](https://app.codecov.io/gh/leonardocustodio/polkadart/pull/419?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Leonardo+Custodio) ```diff @@ Coverage Diff @@ ## main #419 +/- ## ========================================== - Coverage 48.85% 48.84% -0.02% ========================================== Files 177 177 Lines 9443 9445 +2 ========================================== Hits 4613 4613 - Misses 4830 4832 +2 ``` | [Flag](https://app.codecov.io/gh/leonardocustodio/polkadart/pull/419/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Leonardo+Custodio) | Coverage Δ | | |---|---|---| | [polkadart](https://app.codecov.io/gh/leonardocustodio/polkadart/pull/419/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Leonardo+Custodio) | `16.82% <0.00%> (-0.03%)` | :arrow_down: | | [polkadart_cli](https://app.codecov.io/gh/leonardocustodio/polkadart/pull/419/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Leonardo+Custodio) | `12.04% <ø> (ø)` | | | [polkadart_keyring](https://app.codecov.io/gh/leonardocustodio/polkadart/pull/419/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Leonardo+Custodio) | `71.76% <ø> (ø)` | | | [polkadart_scale_codec](https://app.codecov.io/gh/leonardocustodio/polkadart/pull/419/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Leonardo+Custodio) | `54.93% <ø> (ø)` | | | [secp256k1_ecdsa](https://app.codecov.io/gh/leonardocustodio/polkadart/pull/419/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Leonardo+Custodio) | `90.00% <ø> (ø)` | | | [sr25519](https://app.codecov.io/gh/leonardocustodio/polkadart/pull/419/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Leonardo+Custodio) | `85.91% <ø> (ø)` | | | [ss58](https://app.codecov.io/gh/leonardocustodio/polkadart/pull/419/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Leonardo+Custodio) | `96.87% <ø> (ø)` | | | [substrate_bip39](https://app.codecov.io/gh/leonardocustodio/polkadart/pull/419/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Leonardo+Custodio) | `56.37% <ø> (ø)` | | | [substrate_metadata](https://app.codecov.io/gh/leonardocustodio/polkadart/pull/419/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Leonardo+Custodio) | `87.61% <ø> (ø)` | | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Leonardo+Custodio#carryforward-flags-in-the-pull-request-comment) to find out more. | [Files](https://app.codecov.io/gh/leonardocustodio/polkadart/pull/419?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Leonardo+Custodio) | Coverage Δ | | |---|---|---| | [...kages/polkadart/lib/extrinsic/signing\_payload.dart](https://app.codecov.io/gh/leonardocustodio/polkadart/pull/419?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Leonardo+Custodio#diff-cGFja2FnZXMvcG9sa2FkYXJ0L2xpYi9leHRyaW5zaWMvc2lnbmluZ19wYXlsb2FkLmRhcnQ=) | `0.00% <0.00%> (ø)` | |