Panic with error message on OOM in Wasm

[greenhat]

Although wasm32 has a 4GB memory limit due to i32 use for pointer in wasm-bindgen glue code, the actual limit is 2GB - rustwasm/wasm-bindgen#2957, and the manifestation of hitting this limit is accessing a random memory. Like the following message:

TypeError [ERR_ENCODING_INVALID_ENCODED_DATA]: The encoded data was not valid for encoding utf-8
    at new NodeError (node:internal/errors:387:5)
    at TextDecoder.decode (node:internal/encoding:433:15)
    at getStringFromWasm0 (.../node_modules/ergo-lib-wasm-nodejs/ergo_lib_wasm.js:50:30)
    ...
  errno: 12,
  code: 'ERR_ENCODING_INVALID_ENCODED_DATA'
}
An error occurred while extracting data from transaction: TypeError [ERR_ENCODING_INVALID_ENCODED_DATA]: The encoded data was not valid for encoding utf-8

because a negative (i32) pointer is passed to functions like getStringFromWasm0 in the wasm-bindgen glue code.