Merge pull request #1 from ascribe/feature/styling-functional

Feature/styling functional

src/transaction/index.js

@@ -1,6 +1,10 @@
 export makeEd25519Condition from './makeEd25519Condition';
+export makeSha256Condition from './makeSha256Condition';
+export makeThresholdCondition from './makeThresholdCondition';
 export makeCreateTransaction from './makeCreateTransaction';
 export makeOutput from './makeOutput';
 export makeTransaction from './makeTransaction';
 export makeTransferTransaction from './makeTransferTransaction';
+export serializeTransactionIntoCanonicalString from './serializeTransactionIntoCanonicalString';
 export signTransaction from './signTransaction';
+export ccJsonLoad from './utils/ccJsonLoad';

src/transaction/makeEd25519Condition.js

@@ -3,26 +3,24 @@ import { Buffer } from 'buffer';
 import base58 from 'bs58';
 import cc from 'five-bells-condition';
 
+import ccJsonify from './utils/ccJsonify';
+
+
 /**
  * Create an Ed25519 Cryptocondition from an Ed25519 public key to put into an Output of a Transaction
  * @param {string} publicKey base58 encoded Ed25519 public key for the recipient of the Transaction
+ * @param {bool} json If true returns a json object otherwise a crypto-condition type
  * @returns {object} Ed25519 Condition (that will need to wrapped in an Output)
  */
-export default function makeEd25519Condition(publicKey) {
+export default function makeEd25519Condition(publicKey, json=true) {
     const publicKeyBuffer = new Buffer(base58.decode(publicKey));
 
     const ed25519Fulfillment = new cc.Ed25519();
     ed25519Fulfillment.setPublicKey(publicKeyBuffer);
-    const conditionUri = ed25519Fulfillment.getConditionUri();
 
-    return {
-        'details': {
-            'signature': null,
-            'type_id': 4,
-            'type': 'fulfillment',
-            'bitmask': 32,
-            'public_key': publicKey,
-        },
-        'uri': conditionUri,
-    };
+    if (json) {
+        return ccJsonify(ed25519Fulfillment)
+    }
+
+    return ed25519Fulfillment;
 }

src/transaction/makeOutput.js

@@ -7,8 +7,9 @@
  */
 export default function makeOutput(condition, amount = 1) {
     return {
-        amount,
+        amount: JSON.stringify(amount),
         condition,
-        'public_keys': [condition.details.public_key],
+        'public_keys': condition.details.hasOwnProperty('public_key') ?
+            [condition.details.public_key] : [],
     };
 }

src/transaction/makeSha256Condition.js

@@ -0,0 +1,21 @@
+import { Buffer } from 'buffer';
+
+import cc from 'five-bells-condition';
+
+import ccJsonify from './utils/ccJsonify';
+
+/**
+ * Create a Preimage-Sha256 Cryptocondition from a secret to put into an Output of a Transaction
+ * @param {string} preimage Preimage to be hashed and wrapped in a crypto-condition
+ * @param {bool} json If true returns a json object otherwise a crypto-condition type
+ * @returns {object} Preimage-Sha256 Condition (that will need to wrapped in an Output)
+ */
+export default function makeSha256Condition(preimage, json=true) {
+    const sha256Fulfillment = new cc.PreimageSha256();
+    sha256Fulfillment.preimage = new Buffer(preimage);
+
+    if (json) {
+        return ccJsonify(sha256Fulfillment)
+    }
+    return sha256Fulfillment;
+}

src/transaction/makeThresholdCondition.js

@@ -0,0 +1,28 @@
+import { Buffer } from 'buffer';
+
+import base58 from 'bs58';
+import cc from 'five-bells-condition';
+
+import ccJsonify from './utils/ccJsonify';
+/**
+ * Create an Sha256 Threshold Cryptocondition from threshold to put into an Output of a Transaction
+ * @param {number} threshold
+ * @param {array} subconditions
+ * @param {bool} json If true returns a json object otherwise a crypto-condition type
+ * @returns {object} Sha256 Threshold Condition (that will need to wrapped in an Output)
+ */
+export default function makeThresholdCondition(threshold, subconditions=[], json=true) {
+    const thresholdCondition = new cc.ThresholdSha256();
+    thresholdCondition.threshold = threshold;
+
+    subconditions.forEach((subcondition) => {
+        // TODO: add support for Condition and URIs
+        thresholdCondition.addSubfulfillment(subcondition);
+    });
+
+    if (json) {
+        return ccJsonify(thresholdCondition)
+    }
+
+    return thresholdCondition
+}

src/transaction/serializeTransactionIntoCanonicalString.js

@@ -2,7 +2,7 @@ import stableStringify from 'json-stable-stringify';
 import clone from 'clone';
 
 
-export default function serializeTransactionIntoCanonicalString(transaction, input) {
+export default function serializeTransactionIntoCanonicalString(transaction) {
     // BigchainDB signs fulfillments by serializing transactions into a "canonical" format where
     const tx = clone(transaction);
     // Sort the keys

src/transaction/signTransaction.js

@@ -22,7 +22,7 @@ export default function signTransaction(transaction, ...privateKeys) {
     signedTx.inputs.forEach((input, index) => {
         const privateKey = privateKeys[index];
         const privateKeyBuffer = new Buffer(base58.decode(privateKey));
-        const serializedTransaction = serializeTransactionIntoCanonicalString(transaction, input);
+        const serializedTransaction = serializeTransactionIntoCanonicalString(transaction);
         const ed25519Fulfillment = new cc.Ed25519();
         ed25519Fulfillment.sign(new Buffer(serializedTransaction), privateKeyBuffer);
         const fulfillmentUri = ed25519Fulfillment.serializeUri();

src/transaction/utils/ccJsonLoad.js

@@ -0,0 +1,48 @@
+import base58 from 'bs58';
+import cc from 'five-bells-condition';
+import { Buffer } from 'buffer';
+
+/**
+ *
+ * @param {object} conditionJson
+ * @returns {cc.Condition} Ed25519 Condition (that will need to wrapped in an Output)
+ */
+export default function ccJsonLoad(conditionJson) {
+
+    if ('hash' in conditionJson) {
+        let condition = new cc.Condition();
+        condition.type = conditionJson.type_id;
+        condition.bitmask = conditionJson.bitmask;
+        condition.hash = new Buffer(base58.decode(conditionJson.hash));
+        condition.maxFulfillmentLength = parseInt(conditionJson.max_fulfillment_length, 10);
+        return condition
+    } else {
+        let fulfillment;
+
+        if (conditionJson.type_id === 2) {
+            fulfillment = new cc.ThresholdSha256();
+            fulfillment.threshold = conditionJson.threshold;
+            conditionJson.subfulfillments.forEach((subfulfillment) => {
+                subfulfillment = ccJsonLoad(subfulfillment);
+                if ('getConditionUri' in subfulfillment)
+                    fulfillment.addSubfulfillment(subfulfillment);
+                else if ('serializeUri' in subfulfillment)
+                    fulfillment.addSubcondition(subfulfillment)
+            })
+        }
+
+        if (conditionJson.type_id === 0) {
+            fulfillment = new cc.PreimageSha256();
+            fulfillment.preimage = new Buffer(conditionJson.preimage);
+
+        }
+
+        if (conditionJson.type_id === 4) {
+            fulfillment = new cc.Ed25519();
+            fulfillment.publicKey = new Buffer(base58.decode(conditionJson.public_key));
+            if (conditionJson.signature)
+                fulfillment.signature = new Buffer(base58.decode(conditionJson.signature));
+        }
+        return fulfillment;
+    }
+}

src/transaction/utils/ccJsonify.js

@@ -0,0 +1,66 @@
+import base58 from 'bs58';
+
+/**
+ * Create an Ed25519 Cryptocondition from an Ed25519 public key to put into an Output of a Transaction
+ * @param {cc.Fulfillment} fulfillment base58 encoded Ed25519 public key for the recipient of the Transaction
+ * @returns {object} Ed25519 Condition (that will need to wrapped in an Output)
+ */
+export default function ccJsonify(fulfillment) {
+
+    let conditionUri;
+
+    if ('getConditionUri' in fulfillment)
+        conditionUri = fulfillment.getConditionUri();
+    else if ('serializeUri' in fulfillment)
+        conditionUri = fulfillment.serializeUri();
+
+    let jsonBody = {
+        'details': {},
+        'uri': conditionUri,
+    };
+
+    if (fulfillment.getTypeId() === 0) {
+        jsonBody.details.type_id = 0;
+        jsonBody.details.bitmask = 3;
+
+        if ('preimage' in fulfillment) {
+            jsonBody.details.preimage = fulfillment.preimage.toString();
+            jsonBody.details.type = 'fulfillment';
+        }
+    }
+
+    if (fulfillment.getTypeId() === 2)
+        return {
+            'details': {
+                'type_id': 2,
+                'type': 'fulfillment',
+                'bitmask': fulfillment.getBitmask(),
+                'threshold': fulfillment.threshold,
+                'subfulfillments': fulfillment.subconditions.map((subcondition) => {
+                    const subconditionJson = ccJsonify(subcondition.body);
+                    subconditionJson.details.weight = 1;
+                    return subconditionJson.details;
+                })
+            },
+            'uri': conditionUri,
+        };
+
+    if (fulfillment.getTypeId() === 4) {
+        jsonBody.details.type_id = 4;
+        jsonBody.details.bitmask = 32;
+
+        if ('publicKey' in fulfillment) {
+            jsonBody.details.signature = null;
+            jsonBody.details.public_key = base58.encode(fulfillment.publicKey);
+            jsonBody.details.type = 'fulfillment';
+        }
+    }
+
+    if ('hash' in fulfillment) {
+        jsonBody.details.hash = base58.encode(fulfillment.hash);
+        jsonBody.details.max_fulfillment_length = fulfillment.maxFulfillmentLength;
+        jsonBody.details.type = 'condition';
+    }
+
+    return jsonBody;
+}