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What is the reason it cannot load the wasm blob by cargo contract? This problem persist even for newly ink project.


2 Answers 2


I have seen the same error when building my chain binary, it looks like it is related to the toolchain 1.68 and not your code.

When I changed toolchain to nightly-2023-01-01-x86_64-unknown-linux-gnu it disappeared.


You need to switch to rust stable channel by default and then run cargo contract build --release

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