Upgrade_v3_to_v4.md

Upgrade_v3_to_v4

Overview

In v4, the definitions of tables accept and stats have been modified, so we need to delete these two tables first, then deploy ibc.token v4 contract and set the corresponding values of the tables.

Step 1: get the two tables' contents and record them down

$cleos get table <ibc_token_contract> <ibc_token_contract> accepts
$cleos get table <ibc_token_contract> <ibc_token_contract> stats

Step 2: set special ibc.token contract

check out branch upgrade_v3_to_v4, compile and set code to ibc.token contract. this branch add a new action:

   void token::deltokentbl(  ){
      while ( _accepts.begin()  != _accepts.end()   ){ _accepts.erase(_accepts.begin());   }
      while ( _stats.begin()    != _stats.end()     ){ _stats.erase(_stats.begin());       }
   }

Step 3: delete the two tables

cleos push action <ibc_token_contract> deltokentbl '[]' -p <some_account>

Step4: set v4 ibc.token contract

Step5: register token

register accepts and pegtokens again use the data obtained previously

cleos push action <ibc_token_contract> regacpttoken '[....]' ...
cleos push action <ibc_token_contract> regpegtoken '[....]' ...

Guide

This article give a detail and directive steps to upgrade EOS & BOS & TELOS.

ibc_token_upgrade_v3_to_v4.md