Improve Contract initialization in genesis and tooling

[alpe]

Resolves #326

• Extend wasm genesis with gen_mgs field for messages
• handle messages in genesis init process

> wasmd add-wasm-genesis-message -h

genesis_contract_msg_326 f014acb
Wasm genesis subcommands

Usage:
  wasmd add-wasm-genesis-message [flags]
  wasmd add-wasm-genesis-message [command]

Available Commands:
  execute              Execute a command on a wasm contract
  instantiate-contract Instantiate a wasm contract
  list-codes           Lists all codes from genesis contract dump and queued messages
  list-contracts       Lists all contracts from genesis contract dump and queued messages
  store                Upload a wasm binary

Flags:
  -h, --help   help for add-wasm-genesis-message

Global Flags:
      --home string         directory for config and data (default "/Users/alex/.wasmd")
      --log_format string   The logging format (json|plain) (default "plain")
      --log_level string    The logging level (trace|debug|info|warn|error|fatal|panic) (default "info")
      --trace               print out full stack trace on errors

[ethanfrey]

Nice start. I like the approach and implementation so far

[codecov]

Codecov Report

Merging #346 (bac2339) into master (9c0b974) will decrease coverage by 12.56%.
The diff coverage is 58.12%.

@@             Coverage Diff             @@
##           master     #346       +/-   ##
===========================================
- Coverage   69.64%   57.08%   -12.57%     
===========================================
  Files          28       33        +5     
  Lines        2425     3421      +996     
===========================================
+ Hits         1689     1953      +264     
- Misses        618     1318      +700     
- Partials      118      150       +32     

Impacted Files	Coverage Δ
x/wasm/client/cli/gov_tx.go	0.00% <0.00%> (ø)
x/wasm/client/cli/query.go	0.00% <ø> (ø)
x/wasm/internal/keeper/keeper.go	89.97% <ø> (ø)
x/wasm/client/cli/tx.go	26.24% <42.59%> (ø)
x/wasm/module.go	23.07% <50.00%> (+1.07%)	⬆️
x/wasm/client/cli/genesis_msg.go	71.75% <71.75%> (ø)
x/wasm/internal/keeper/genesis.go	90.32% <80.00%> (-2.28%)	⬇️
x/wasm/internal/types/test_fixtures.go	95.78% <92.68%> (-1.02%)	⬇️
app/app.go	87.75% <100.00%> (ø)
x/wasm/internal/types/genesis.go	97.61% <100.00%> (+1.06%)	⬆️
... and 7 more

[ethanfrey]

Very nice. I think this is ready to merge. I was just a bit confused by some of the changes to cli/proposal parsing, but the genesis stuff looks solid.

One comment, which could be added later, is to add a file (REAMDE or other) that shows how to add a few items to the genesis file via cli and how to get the contract addresses that would be created. I guess contrib/local/00-genesis.sh is a good reference, but a bit of test in the README (linking to that example) would make onboarding easier

[alpe]

After #358

[alpe]

Rebased

[ethanfrey]

Looks good.

I will merge, but please address my comment in a follow-up PR (or let me know it is better how it is). I can now at least do last integration tests

[ethanfrey]

variable a is a bit confusing.

But I would note this check is only required if ! coins.IsEmpty(). I guess it could make sense that funded only genesis accounts send messages, but if we just want to prevent obvious errors, we can short circuit this is we are not sending any balance, so we let accounts with no balances create contracts as long as they don't interact with funds.