working %create-raw-tx

PROVIDER.md

@@ -20,3 +20,12 @@
 :btc-provider|action ['reqid' %tx-info [%32 0x9ece.9c56.9ab3.27db.ada5.a51e.2653.7b3f.7e99.5579.c18a.af4f.8620.304b.ce53.16f1]]
 ::  4 inputs, one output
 ```
+
+##  Generate a Raw TX from Inputs/Outputs
+```
+:btc-provider|command [%set-credentials api-url='http://localhost:50002']
+=inputs ~[[[%32 0xe86.8771.b3bf.f789.525e.21ba.c735.e280.70d1.eff0.fb4d.f59a.dc98.e914.8e2f.85d4] 0]]
+=outputs ~[[[%bech32 'bc1q0ydcskwye4rqky4qankhl4kegajl8nh50plmx0'] 12.500.000]]
+
+:btc-provider|action ['rawtx0' %create-raw-tx inputs outputs]
+```

app/btc-provider.hoon

@@ -114,6 +114,9 @@
       ::
         %raw-tx
       [%get-raw-tx txid.body.act]
+      ::
+        %create-raw-tx
+      [%create-raw-tx inputs.body.act outputs.body.act]
       ::
         %ping
       [%get-block-and-fee ~]
@@ -173,6 +176,11 @@
     ?>  ?=([%get-raw-tx *] resp)
     :_  state
     ~[(send-update [%.y (get-req-id wire) %raw-tx +.resp])]
+    ::
+      [%create-raw-tx @ *]
+    ?>  ?=([%get-raw-tx *] resp)
+    :_  state
+    ~[(send-update [%.y (get-req-id wire) %raw-tx +.resp])]
     ::
       [%ping @ *]
     ?>  ?=([%get-block-and-fee *] resp)

app/btc-wallet-hook.hoon

@@ -55,7 +55,7 @@
     def   ~(. (default-agent this %|) bowl)
     hc    ~(. +> bowl)
 ::
-++  on-initb
+++  on-init
   ^-  (quip card _this)
   ~&  >  '%btc-wallet-hook initialized'
   :_  this(fam-limit.state fam-limit:defaults)

lib/btc-provider.hoon

@@ -22,6 +22,10 @@
       ==
     ~|("legacy addresses not yet supported" !!)
   [%bech32 addrc]
+::
+++  txid-to-cord
+  |=  =txid  ^-  cord
+  (en:base16:mimes:html txid)
 ::  +from-epoch: time since Jan 1, 1970 in seconds.
 ::
 ++  from-epoch
@@ -59,12 +63,52 @@
   ^-  request:http
   [%'GET' url ~ ~]
 ::
+++  post-request
+  |=  [url=@t body=json]
+  ^-  request:http
+  :*  %'POST'
+      url
+      ~[['Content-Type' 'application/json']]
+      =,  html
+      %-  some
+        %-  as-octt:mimes
+        (en-json body)
+  ==
+::
 ++  gen-request
  |=  [=host-info ract=action:rpc]
   ^-  request:http
   %+  rpc-action-to-http
   api-url.host-info  ract
 ::
+++  action-to-json
+  |=  ract=action:rpc
+  |^  ^-  json
+  =,  enjs:format
+  ?+  -.ract  ~|("Unsupported action for POST" !!)
+      %create-raw-tx
+    %-  pairs
+    :~  [%inputs [%a (turn inputs.ract input)]]
+        [%outputs [%a (turn outputs.ract output)]]
+    ==
+  ==
+  ::
+  ++  input
+    |=  [=txid pos=@ud]
+    ^-  json
+    =,  enjs:format
+    %-  pairs
+    :~  [%txid [%s (txid-to-cord txid)]]
+        [%vout (numb pos)]
+    ==
+  ++  output
+    |=  [=address value=sats]
+    =,  enjs:format
+    ^-  json
+    %-  frond
+    [(address-to-cord address) (numb value)]
+  --
+::
 ++  to-response
   |=  result:rpc
   ^-  result
@@ -85,6 +129,9 @@
     ::
       %get-raw-tx
     [id.res (raw-tx res.res)]
+    ::
+      %create-raw-tx
+    [%get-raw-tx (raw-tx res.res)]
     ::
       %get-block-count
     [id.res (ni:dejs:format res.res)]
@@ -136,24 +183,33 @@
 ++  rpc-action-to-http
   |=  [endpoint=@t ract=action:rpc]
   |^  ^-  request:http
-  %-  get-request
   ?-  -.ract
       %get-address-info
+    %-  get-request
     %+  mk-url  '/addresses/info/'
     (address-to-cord address.ract)
     ::
       %get-tx-vals
+    %-  get-request
     %+  mk-url  '/gettxvals/'
-    (en:base16:mimes:html txid.ract)
+    (txid-to-cord txid.ract)
     ::
       %get-raw-tx
+    %-  get-request
     %+  mk-url  '/getrawtx/'
-    (en:base16:mimes:html txid.ract)
+    (txid-to-cord txid.ract)
+    ::
+      %create-raw-tx
+    %+  post-request
+      (mk-url '/createrawtx' '')
+    (action-to-json ract)
     ::
       %get-block-count
+    %-  get-request
     (mk-url '/getblockcount' '')
     ::
       %get-block-and-fee
+    %-  get-request
     (mk-url '/getblockandfee' '')
   ==
   ++  mk-url

sur/btc-provider.hoon

@@ -11,9 +11,12 @@
   $%  [%address-info =address]
       [%tx-info =txid]
       [%raw-tx =txid]
+      [%create-raw-tx inputs=(list [=txid pos=@ud]) outputs=(list [=address value=sats])]
       [%ping ~]
   ==
 +$  result  [=req-id body=result-body]
+::  %raw-tx: result type for both %raw-tx and %create-raw-tx actions
+::
 +$  result-body
   $%  [%address-info utxos=(set utxo) used=? block=@ud]
       [%tx-info =info:tx]
@@ -39,6 +42,7 @@
     $%  [%get-address-info =address]
         [%get-tx-vals =txid]
         [%get-raw-tx =txid]
+        [%create-raw-tx inputs=(list [=txid pos=@ud]) outputs=(list [=address value=sats])]
         [%get-block-count ~]
         [%get-block-and-fee ~]
     ==
@@ -47,6 +51,7 @@
     $%  [%get-address-info utxos=(set utxo) used=? block=@ud]
         [%get-tx-vals =info:tx]
         [%get-raw-tx =txid =rawtx]
+        [%create-raw-tx =rawtx]
         [%get-block-count block=@ud]
         [%get-block-and-fee block=@ud fee=sats]