feat: add StateMinerDeadlines to gateway

[qwdsds]

Related Issues

Proposed Changes

Add StateMinerDeadlines to gateway.

#11693

Additional Info

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[rvagg]

lgtm as per discussion in #11693

[magik6k]

For this to work you'll also need to add a proxy method in https://github.com/filecoin-project/lotus/blob/master/gateway/proxy_fil.go which just needs to check that the tipset is recent enough. Without that this method won't work correctly on lotus-gateway

[qwdsds]

For this to work you'll also need to add a proxy method in https://github.com/filecoin-project/lotus/blob/master/gateway/proxy_fil.go which just needs to check that the tipset is recent enough. Without that this method won't work correctly on lotus-gateway

StateMinerDeadlines are already in this gateway/proxy_fil.go

[rvagg]

still seems fine to me, needs @magik6k to re-review

[Stebalien]

Confirmed that this exists in proxy_fil.go and the lookback limit is being enforced.