feat: 🎸 create asProposal methods

[sansan]

Description

Adds an optional asProposal parameter (default: true) to getTotalFees() and toSignablePayload() methods, allowing flexibility to handle MultiSig transactions as direct transactions rather than proposals.

• PolymeshTransactionBase.getTotalFees(asProposal = true)

  • When asProposal: false, uses the signing account directly for fee calculation (ignores MultiSig payer)
  • When asProposal: true (default), maintains existing behavior (uses MultiSig payer if available)

• PolymeshTransactionBase.toSignablePayload(metadata, asProposal = true)

  • When asProposal: false, returns payload with multiSig: null and unwrapped transaction
  • When asProposal: true (default), maintains existing behavior (includes MultiSig address and wraps as proposal)

• New helper methods:

  • composeTxForFees(asProposal: boolean) - Conditionally wraps transaction based on asProposal flag
  • getBaseTransaction() - Abstract method to get unwrapped transaction (implemented in PolymeshTransaction and PolymeshTransactionBatch)

• Updated getPayingAccount(asProposal = true)

  • Only uses MultiSig payer logic when asProposal: true
  • Falls back gracefully when MultiSig payer's primary account has no identity

JIRA Link

https://polymesh.atlassian.net/browse/DA-1558

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
100.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud