simplex-chat/apps/simplex-calculator-bot

SimpleX Calculator

A calculator bot built with the SimpleX Chat Node.js library.

Each user who connects via the bot's business address receives a calculator message with keys as commands. The bot replaces this message after each input.

• × and ÷ are applied before + and -, so 2 + 3 × 4 = equals 14.
• % is computed as in Apple's calculator: 100 + 15 % = equals 115.
• Tap C to clear the number, and C again to clear the calculation.
• Numbers are shown without exponent, up to 15 digits; larger results are shown as Error.
• You can also send numbers and keys like +, =, add or c. Expressions like (2 + 3) × 4 are entered as one number, and the bot replies to them with the result.
• The bot deletes keys and numbers, tapped or sent, and logs each computed operation, such as 15 + 10 = 25.
• After 10 minutes without input, the bot turns the calculator off and discards the calculation; tap any key to turn it on.
• The bot sends keys like /+ to apps with chat protocol version 21 or later, and keys like /add to older apps.

Run

npm install
npm run build
npm start

The bot prints its address and keeps its data in ./data.

To add a SimpleX name to the address, register the name with the address short link, and run npm start -- --domain yourname.simplex. The name is kept when the bot starts without --domain.

To use the library from this repository, build it and run npm install --no-save ../../packages/simplex-chat-nodejs instead of npm install.

Test

npm test

A local SMP server is started for the end-to-end test. On Linux, smp-server is downloaded from simplexmq releases; to use another build, or on other systems, set SMP_SERVER to the path of smp-server.