HTML return patching, 6 domain part support, sepolia ENS

[nand2]

Hi!

This adds:

• Processing of the return of content-type HTML :
  • patching the fetch() JS function so that it works with web3:// URLs
  • Handling links to absolute web3:// URLs
  • -> This is not 100% perfect, will fail if the content is compressed and spread over several chunks (should be rare)
• Add support for 6 parts domains, so that ENS subdomains in testnet works, e.g. dblog.dblog.eth.11155111.w3link.io
• Add sample ENS config for sepolia in config.toml.sample

Thanks!

[syntrust]

Hi @nand2, it seems like an interesting feature, can you describe a little about the background and motivation?

[nand2]

Hi!

Sure! It's about contracts interacting with other contracts.

When a smart contract website A only interact with itself with javascript fetch() and tags, we can make it work both on native web3:// browsers and on the gateway by using relative URLs (e.g. fetch("/path/to/resource") <a href="/path">.

But when a smart contract A wants to interact with smart contract B, then it has to use absolute URLs : fetch("web3://contractB/path/to/resource") <a href="web3://contractB/path">, and while this work on native web3:// browsers, it break on the gateway.

Until now, for small contracts, when we reached this issue, we kind of managed by modifying the architecture of the website, but as websites go bigger, it has to be the other way around.

The proposed patch is injecting javascript that look for these absolute web3:// URLs and replace them by their gateway HTTP URLs.

Thanks!

[syntrust]

The PR merged and deployed to w3link.io.
Also added new A record *.dblog.eth.11155111.w3link.io and updated certificate.

When accessing https://dblog.eth.11155111.w3link.io/ I got
unsupported chain short name from name service: w3q-t:0xa56d9016b9484dd0707535a378bdeef2cc602ccf

[qzhodl]

Do you also deploy the ENS support in the config file?

[nand2]

For this, you need :

[name2chain]
"w3q-t" = 3333

in the config.
And it should be all good!

[nand2]

Ok saw the short name change from w3q-t to es-t, will deploy a version using this new short name for chain 3333.

[syntrust]

[name2chain]
"es-t" = 3333

This one works, would you like to make the change in this PR? @nand2