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Project Description

Migratable Counter is a project to demonstrate contract migration in testing environment and on testnet.

To migrate from v1.0.0 (contracts/counter) to v2.0.0 (contracts/counter-new) following changes are required:

  1. Remove ResetCounter {} and add SetCounter { value: Uint128 } in msg.rs
  2. Update QueryCounters {} -> Vec<(Addr, Uint128)> to QueryCounters { addresses: Option<Vec<String>> } -> Vec<QueryCountersResponse> and implement struct QueryCountersResponse { owner: Addr, counter_value: Uint128 } in msg.rs
  3. Add ActionType::Mul in types.rs
  4. Update TOTAL_CALLS: Item<u32> to TOTAL_CALLS: Item<Uint128> in state.rs
  5. Add pub const TOTAL_CALLS_PREVIOUS: Item<Uint128> = Item::new("total v1.0.0 contract calls"); and save TOTAL_CALLS value to TOTAL_CALLS_PREVIOUS. TOTAL_CALLS must be cleared

COUNTERS state and contract balances must be preserved.