[PLA-2209] Adds mortality to transactions on WC

[leonardocustodio]

PR Type

• Bug fix

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Description

• Replace immortal era with computed mortal era.

• Retrieve current block number and corresponding block hash.

• Update transaction payload to include dynamic era data.

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Changes walkthrough 📝

	Relevant files
Bug fix	transaction.ts Implement mortal era computation for transactions.              resources/js/store/transaction.ts Added import for GenericExtrinsicEra. Removed static immortal era extraction. Fetched current block number and block hash. Replaced payload era with computed mortalEra. +8/-5

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[github-actions]

PR Reviewer Guide 🔍

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⏱️ Estimated effort to review: 2 🔵🔵⚪⚪⚪

🧪 No relevant tests

🔒 No security concerns identified

⚡ Recommended focus areas for review Hard-coded Period The period value "64" used in the instantiation of GenericExtrinsicEra is hard-coded. Confirm that this constant is valid under all intended network conditions. const mortalEra = new GenericExtrinsicEra(api.registry, { current: blockNumber.toNumber(), period: 64 }); Block Data Conversion Verify that converting the block number to a hexadecimal string using toHex() aligns correctly with the transaction payload format and network requirements. const blockNumber = currentBlock.block.header.number; const blockHash = await api.rpc.chain.getBlockHash(blockNumber.toNumber()); // This is the call that comes from the platform transactions 'encodedCall' const call = transaction.encodedData; const genesis = genesisHash.toHex(); // The genesis block const mortalEra = new GenericExtrinsicEra(api.registry, { current: blockNumber.toNumber(), period: 64 }); const payloadToSign: SignerPayloadJSON = { specVersion: runtime.specVersion.toHex(), transactionVersion: runtime.transactionVersion.toHex(), address: address, blockHash: blockHash.toHex(), blockNumber: blockNumber.toHex(), era: mortalEra.toHex(),

[github-actions]

PR Code Suggestions ✨

Explore these optional code suggestions:

Category	Suggestion	Impact
Possible issue	Ensure blockNumber type consistency Confirm that blockNumber is of a type that provides a toHex() method; if not, convert or instantiate it using the registry methods to ensure consistent hexadecimal conversion. resources/js/store/transaction.ts [41] -const blockNumber = currentBlock.block.header.number; +const blockNumber = api.registry.createType('BlockNumber', currentBlock.block.header.number); Suggestion importance[1-10]: 7 __ Why: The suggestion addresses a potential issue with blockNumber not having a toHex() method by converting it using the registry, which could prevent runtime errors. While it adds type safety, it is an enhancement rather than a critical fix.	Medium