In this example, we demonstrate how to create and run a Rust function in the Second State Rust Functions.
If you have not done so already, follow these simple instructions to install Rust and rustwasmc.
rustwasmc build
Upload the wasm file in the pkg folder to the FaaS. Double check the .wasm file name before you upload.
curl --location --request POST 'https://rpc.ssvm.secondstate.io:8081/api/executables' \
--header 'Content-Type: application/octet-stream' \
--header 'SSVM-Description: watermark' \
--data-binary '@pkg/watermark_lib_bg.wasm'
Returns
{"wasm_id":349,"wasm_sha256":"0x778fae35baf1d461b1e931d3c41964908947a2b3fbde02166b50d573f1e15959","SSVM_Usage_Key":"00000000-0000-0000-0000-000000000000","SSVM_Admin_Key":"50378009-bbbe-4043-8d7e-af80d0af531a"}
Note: You can update this binary with the SSVM_Admin_Key.
$ curl --location --request PUT 'https://rpc.ssvm.secondstate.io:8081/api/update_wasm_binary/349' \
--header 'Content-Type: application/octet-stream' \
--header 'SSVM_Admin_Key: 7dxxxxxx-xxxx-xxxx-xxxx-xxxxxxxx0c41' \
--data-binary '@pkg/watermark_lib_bg.wasm'
Add watermark to a local PNG image.
$ curl --location --request POST 'https://rpc.ssvm.secondstate.io:8081/api/multipart/run/148/watermark/bytes' \
--header 'Content-Type: multipart/form-data' \
--form 'input_1=Second State Functions' \
--output tmp.png
Open web page html/index.html in any browser. See a static demo.
When you changed the parameters in lib.rs, you may need to test your poster. For better local tests, we added main.rs.
If you want to change the input text, you need to open the main.rs.
vi src/main.rs
Run the following commland to see the tested result.
cargo run
If everything goes well, follow the aboving instructions to publish your web application.