@unchainedshop/plugins/tsconfig.json

Because of a Typescript issue with upstream "postfinancecheckout", the Postfinance plugin has been disabled from transpilation, import the source ts files from src and enable node_module tsc or copy over the src/payment/postfinance-checkout to your projec

{
  "extends": "../shared/base.tsconfig.json",
  "compilerOptions": {
    "declarationDir": "./lib",
    "rootDir": "./src",
    "outDir": "./lib"
  },
  "exclude": ["**/*.test.ts", "**/*.test.js", "tests", "lib"]
}