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IOTA.md

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IOTA Caddy

This version of Caddy has an IOTA interceptor middleware which intercepts calls to an IRI node by parsing the JSON command and then executing attachToTangle within the middleware, instead of delegating it to IRI. Other IRI API commands are delegated to the specified IRI node.

Sample Caddyfile to use in conjunction with this modified Caddy version:

127.0.0.1:15265 {

        gzip

        # log requests to the proxy with rotation
        log requests.log {
                rotate_size 100
                rotate_age  90
                rotate_keep 20
                rotate_compress
        }

        #tls /etc/letsencrypt/live/iota-tangle.io/fullchain.pem /etc/letsencrypt/live/iota-tangle.io/privkey.pem

        # limit request body to 10 megabytes
        limits 10mb

        # intercept attachToTangle calls with a max MWM of 14 and 20 txs per call
        iota 14 20

        proxy / http://127.0.0.1:14265 {
                header_upstream X-IOTA-API-VERSION 1.4
                header_upstream Access-Control-Allow-Origin *
        }
}

where the iota directive instructs Caddy to execute the middleware. The first argument defines the maximum allowed minimum weight magnitude within the request and the second the maximum amount of transactions to commence Proof of Work for.

Build/Install

Prerequisites:

  • Linux system
  • GCC compiler
  • At least Go version 1.12
  • Git
  1. Pull the repository from GitHub into a directory outside of $GOPATH:
    git clone [email protected]:luca-moser/iotacaddy.git
  2. cd iotacaddy/caddy
  3. compile Caddy with the AVX or SSE implementation: go build -tags="pow_avx" or go build -tags="pow_sse"
  4. This will create a binary called caddy in the iotacaddy/caddy folder.

Run

  1. Move the caddy binary and the corresponding Caddyfile into the same directory of your choice
  2. Adjust the directives, hostname and IRI URL
  3. Run caddy via ./caddy which will the configured interceptor parameters up on startup:
Activating privacy features... done.                                                                                             
[iota interceptor] 2019/06/03 12:56:54 iota API call interception configured with max bundle txs limit of 20 and max MWM of 14   
[iota interceptor] 2019/06/03 12:56:54 using PoW implementation: SyncAVX                                                         
                                                                                                                                 
Serving HTTPS on port 14265                                                                                                      
https://trinity.iota-tangle.io:14265

If an attachToTangle calls get intercepted, the middleware will log it in stdout similar to:

[iota interceptor] 2019/06/03 12:58:08 new attachToTangle request from 80.218.171.223:33442                                      │
[iota interceptor] 2019/06/03 12:58:08 VBDKIEDKVYHWGROOMBEFZOJFAVITMGQBASCPVZWYTVRFSLMJTNYOOZVGVBEFZINUTVQI9VZQCISPDXJN9 - [input│
] -0.000001 Mi                                                                                                                   │
[iota interceptor] 2019/06/03 12:58:08 bundle: PYPWHTVICKOEJ9CFHDHOJJAWDARUZNPOIXONCYKHLFEFEGKXWSEJXGZSXKTS9BBGNKTQGQZCLCHPLIKIC │
[iota interceptor] 2019/06/03 12:58:08 bundle is using -0.000001 Mi as input                                                     │
[iota interceptor] 2019/06/03 12:58:08 doing PoW for bundle with 1 txs...                                                        │
[iota interceptor] 2019/06/03 12:58:08 took 273ms to do PoW for bundle with 1 txs

Caddy will generate a requests.log file containing the requests against the proxy.