Upgrade tutorial to cosmwasm 0.7

[ethanfrey]

When cosmwasm 0.7 is release, this will mean a number of changes to contract development. There is also a new escrow contract release to start with as a basis. We should update the tutorial to match it.

This requires not only a tagged 0.7 cosmwasm for contract development, but a tagged wasmd that supports 0.7 contracts.

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[clevinson]

@ethanfrey Is the current master branch of the escrow contract ready and cosmwasm 0.7 compatible? I'm happy to start work on upgrading tutorials once 0.7 is ready.

Sidenote: currently the wasmd version subcommand does not work. I've filed a seperate issue for that (CosmWasm/wasmd#24)

[ethanfrey]

@clevinson I decided to cut a stable toolchain (cosmwasm + wasmd) with cosmwasm0.6 support, as I heard cosmos-sdk 0.38 is almost out, and we can get a stable state asap. (And testnet).

escrow and erc20 are both at 0.6.1, wasmd is not, so the blockchain part won't work.
This should probably wait until we have 0.6 support in wasmd... hopefully later this week.

[tac0turtle]

this is blocked on sdk 0.38.1 correct?

[ethanfrey]

No. The tutorial was updated to 0.6 (but can use a review and maybe polish). 0.6 will be released with 0.38.1 but no api changes.

0.7 is in progress with api changes. This task is for the future

[ethanfrey]

I'm going through this now

[ethanfrey]

Closed by #36