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[move] enhance vouch system [breaking] (#303)
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98 changes: 98 additions & 0 deletions
98
framework/libra-framework/sources/ol_sources/migrations.move
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,98 @@ | ||
| module ol_framework::migrations { | ||
| use std::vector; | ||
| use std::string; | ||
| use std::error; | ||
| use diem_framework::system_addresses; | ||
| use ol_framework::epoch_helper; | ||
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| use diem_std::debug::print; | ||
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| // migrations | ||
| use ol_framework::vouch_migration; | ||
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| //////// CONST //////// | ||
| const EMIGRATIONS_NOT_INITIALIZED: u64 = 1; | ||
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| //////// STRUCTS //////// | ||
| struct Migration has store, copy { | ||
| number: u64, | ||
| epoch: u64, | ||
| description: vector<u8>, | ||
| } | ||
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| struct Migrations has key { | ||
| last_migration: u64, | ||
| history: vector<Migration>, | ||
| } | ||
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| public fun execute(root: &signer) acquires Migrations { | ||
| // ensure ol_framework | ||
| system_addresses::assert_ol(root); | ||
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| // execute all migrations | ||
| if (apply_migration(root, 1, b"Vouch migration initializes GivenVouches, ReceivedVouches, and drop MyVouches")) { | ||
| vouch_migration::migrate_my_vouches(); | ||
| }; | ||
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| } | ||
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| fun apply_migration(root: &signer, mig_number: u64, description: vector<u8>): bool acquires Migrations { | ||
| if (can_execute_migration(mig_number)) { | ||
| print(&string::utf8(b">>> Migration started:")); | ||
| print(&mig_number); | ||
| print(&string::utf8(description)); | ||
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| register_migration(root, mig_number, description); | ||
| true | ||
| } else { | ||
| false | ||
| } | ||
| } | ||
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| fun can_execute_migration(mig_number: u64): bool acquires Migrations { | ||
| get_last_migration_number() < mig_number | ||
| } | ||
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| fun register_migration(root: &signer, mig_number: u64, description: vector<u8>) acquires Migrations { | ||
| let epoch = epoch_helper::get_current_epoch(); | ||
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| if (exists<Migrations>(@ol_framework)) { | ||
| // update | ||
| let state = borrow_global_mut<Migrations>(@diem_framework); | ||
| state.last_migration = mig_number; | ||
| vector::push_back(&mut state.history, Migration { | ||
| number: mig_number, | ||
| epoch: epoch, | ||
| description: description, | ||
| }); | ||
| } else { | ||
| // initialize | ||
| move_to<Migrations>(root, Migrations { | ||
| last_migration: mig_number, | ||
| history: vector[Migration { | ||
| number: mig_number, | ||
| epoch: epoch, | ||
| description: description, | ||
| }], | ||
| }); | ||
| }; | ||
| } | ||
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| public fun get_last_migration_number(): u64 acquires Migrations { | ||
| if (!exists<Migrations>(@ol_framework)) { | ||
| return 0 | ||
| }; | ||
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| let state = borrow_global<Migrations>(@ol_framework); | ||
| state.last_migration | ||
| } | ||
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| public fun get_last_migrations_history(): (u64, u64, vector<u8>) acquires Migrations { | ||
| assert!(exists<Migrations>(@ol_framework), error::invalid_state(EMIGRATIONS_NOT_INITIALIZED)); | ||
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| let state = borrow_global<Migrations>(@ol_framework); | ||
| let last_migration = vector::borrow(&state.history, vector::length(&state.history) -1); | ||
| (last_migration.number, last_migration.epoch, last_migration.description) | ||
| } | ||
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| } |
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