tsconfig.json

{
  "compilerOptions": {
    "target": "esnext",
    "baseUrl": "src",
    "rootDir": "src",
    "outDir": "build",
    "moduleResolution": "node",
    "module": "commonjs",
    "declaration": true,
    "sourceMap": true,
    "esModuleInterop": true,
    "strict": true /* Enable all strict type-checking options. */,
    "resolveJsonModule": true /* Required by Ethereum plugin for loading ABIs. */,
    "preserveWatchOutput": true /* Don't clear console in watch mode. */,
    "traceResolution": false /* Report module resolution log messages. */,
    "listEmittedFiles": false /* Print names of generated files part of the compilation. */,
    "listFiles": false /* Print names of files part of the compilation. */,
    "pretty": true /* Stylize errors and messages using color and context. */,
    "typeRoots": ["node_modules/@types", "src/types"],
    "paths": {
      "ripple-keypairs": ["./types/ripple-keypairs"],
      "ripple-address-codec": ["./types/ripple-address-codec"]
    }
  }
}