pay.js

if (process.argv.length < 5)
{
    console.log("Usage: node pay <source family seed> <amount xrp> <destination account>")
    process.exit(1)
}
const keypairs = require('ripple-keypairs');
const secret  = process.argv[2];
const address = keypairs.deriveAddress(keypairs.deriveKeypair(secret).publicKey)
const amount = BigInt(process.argv[3]) * 1000000n
const dest = process.argv[4];
const hook_account = dest;

const RippleAPI = require('ripple-lib').RippleAPI;
const fs = require('fs');
const api = new RippleAPI({server: 'ws://localhost:6005'});
api.on('error', (errorCode, errorMessage) => {console.log(errorCode + ': ' + errorMessage);});
api.on('connected', () => {console.log('connected');});
api.on('disconnected', (code) => {console.log('disconnected, code:', code);});
api.connect().then(() => {
    let j = {
        Account: address,
        TransactionType: "Payment",
        Amount: "" + amount,
        Destination: dest,
        Fee: "100"
    }
    api.prepareTransaction(j).then((x)=>
    {
        s = api.sign(x.txJSON, secret)
        console.log(s)
        api.submit(s.signedTransaction).then( response => {
            console.log(response.resultCode, response.resultMessage);
            let countdown = (x)=>{                                                                                     
                if (x <= 0)                                                                                            
                    return console.log("")                                                                             
                process.stdout.write(x + "... ");                                                                      
                setTimeout(((x)=>{ return ()=>{countdown(x);} })(x-1), 1000);                                          
            };                                                                                                         
            countdown(6);                                                                                              
            setTimeout(                                                                                                
            ((txnhash)=>{                                                                                              
                return ()=>{                                                                                           
                    api.getTransaction(txnhash, {includeRawTransaction: true}).then(                                   
                        x=>{                                                                                           
                            execs = JSON.parse(x.rawTransaction).meta.HookExecutions;                                  
                            for (y in execs)                                                                           
                            {                                                                                          
                                exec = execs[y].HookExecution;                                                         
                                if (exec.HookAccount == hook_account)                                                  
                                {                                                                                      
                                    console.log("Hook Returned: ",                                                     
                                        Buffer.from(exec.HookReturnString, 'hex').toString('utf-8'));                  
                                    process.exit(0);                                                                   
                                }                                                                                      
                            }                                                                                          
                            console.log("Could not find return from hook");                                            
                            process.exit(1);                                                                           
                        });                                                                                            
                }                                                                                                      
            })(s.id), 6000);                            
        }).catch (e=> { console.log(e) });
    });
}).then(() => {}).catch(console.error);