feat: set vote fiat value

[wa0x6e]

Vote Value Computation

Closes https://github.com/snapshot-labs/workflow/issues/614

This PR assigns a fiat value to a vote, when available

Key Features

🎯 Core Enhancement

• Add vp_value column to votes table for storing fiat values (13 digits, 3 decimal precision, see https://github.com/snapshot-labs/workflow/issues/618)
• Calculate vote value by multiplying voting power with corresponding strategy values
• Seamless integration with existing voting power calculation system: work when proposal had not any fiat values set

💰 Value Calculation Logic

• Fallback Handling: Graceful degradation to 0 value when calculations fail, cb column will not be updated
• Real-time Computation: Values calculated during vote processing

🔧 Technical Implementation

• Centralized Logic: All value calculations consolidated in src/helpers/entityValue.ts
• Database Schema: New vp_value column with appropriate precision (DECIMAL(13,3))
• Error Resilience: Robust error handling prevents vote processing failures

Database Changes

• Added vp_value DECIMAL(13,3) column to votes table
• Maintains backwards compatibility with existing vote records

Testing

Create the column vp_value

  ALTER TABLE votes ADD COLUMN vp_value DECIMAL(13,3) NOT NULL DEFAULT 0.000;
  CREATE INDEX vp_value ON votes(vp_value);

• On a proposal with vp value set, vote (edit the db rows to manually set some values in vp_value_by_strategy)
• The vote's should have some value in the vp_value column (voting power x strategy value)

[Copilot]

Pull Request Overview

This PR implements vote fiat value calculation functionality by adding a new vp_value column to the votes table to store the calculated fiat value of each vote. The value is computed by multiplying each strategy's voting power by its corresponding fiat value from the proposal.

• Added vp_value column to votes table with appropriate database schema changes
• Implemented getVoteValue helper function to calculate vote values based on strategy values
• Updated vote writer to compute and store vote values with error handling fallback

Reviewed Changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
test/schema.sql	Adds vp_value column and index to votes table schema
src/helpers/entityValue.ts	New helper function to calculate vote value from proposal and vote data
src/writer/vote.ts	Integrates vote value calculation into vote processing with error handling
src/helpers/actions.ts	Parses vp_value_by_strategy from proposal data
test/unit/helpers/entityValue.test.ts	Comprehensive test coverage for vote value calculation
.env.example	Adds LAST_CB environment variable configuration