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definition.js
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definition.js
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/*jslint node: true */
"use strict";
var crypto = require('crypto');
var _ = require('lodash');
var async = require('async');
var constants = require('./constants.js');
var storage = require('./storage.js');
var db = require('./db.js');
var ecdsaSig = require('./signature.js');
var merkle = require('./merkle.js');
var ValidationUtils = require("./validation_utils.js");
var objectHash = require("./object_hash.js");
var hasFieldsExcept = ValidationUtils.hasFieldsExcept;
var isStringOfLength = ValidationUtils.isStringOfLength;
var isNonemptyString = ValidationUtils.isNonemptyString;
var isInteger = ValidationUtils.isInteger;
var isNonnegativeInteger = ValidationUtils.isNonnegativeInteger;
var isPositiveInteger = ValidationUtils.isPositiveInteger;
var isNonemptyArray = ValidationUtils.isNonemptyArray;
var isArrayOfLength = ValidationUtils.isArrayOfLength;
var isValidAddress = ValidationUtils.isValidAddress;
// validate definition of address or asset spending conditions
function validateDefinition(conn, arrDefinition, objUnit, objValidationState, arrAuthentifierPaths, bAssetCondition, handleResult){
function getFilterError(filter){
if (!filter)
return "no filter";
if (hasFieldsExcept(filter, ["what", "asset", "type", "own_funds", "address", "amount", "amount_at_least", "amount_at_most"]))
return "unknown fields in filter";
if (filter.what !== "input" && filter.what !== "output")
return "invalid what="+filter.what;
if (bAssetCondition && filter.asset === "this asset" && objValidationState.bDefiningPrivateAsset)
return "private asset cannot reference itself";
if ("asset" in filter && !(filter.asset === "base" || isStringOfLength(filter.asset, constants.HASH_LENGTH) || bAssetCondition && filter.asset === "this asset"))
return "invalid asset: "+filter.asset;
if (filter.what === "output"){
if ("type" in filter)
return "output canot have type";
if ("own_funds" in filter)
return "output canot have own_funds";
}
if (bAssetCondition && "own_funds" in filter)
return "asset condition cannot be filtered by own_funds";
if ("type" in filter && filter.type !== "issue" && filter.type !== "transfer")
return "invalid type: "+filter.type;
if ("own_funds" in filter && typeof filter.own_funds !== "boolean")
return "own_funds must be boolean";
if (bAssetCondition && filter.address === 'this address')
return "asset condition cannot reference this address";
if ("address" in filter && !isValidAddress(filter.address) && filter.address !== 'this address') // it is ok if the address was never used yet
return "invalid address: "+filter.address;
if ("amount" in filter && !isPositiveInteger(filter.amount))
return "amount must be positive int";
if ("amount_at_least" in filter && !isPositiveInteger(filter.amount_at_least))
return "amount_at_least must be positive int";
if ("amount_at_most" in filter && !isPositiveInteger(filter.amount_at_most))
return "amount_at_most must be positive int";
if (filter.amount && (filter.amount_at_least || filter.amount_at_most))
return "can't have amount and amount_at_least/most at the same time";
return null;
}
// it is difficult to ease this condition for bAssetCondition:
// we might allow _this_ asset (the asset this condition is attached to) to be private but we might have only part of this asset's payments disclosed,
// some parties may see more disclosed than others.
function determineIfAnyOfAssetsIsPrivate(arrAssets, cb){
if (arrAssets.length === 0)
return cb(false);
conn.query("SELECT 1 FROM assets WHERE unit IN(?) AND is_private=1 LIMIT 1", [arrAssets], function(rows){
cb(rows.length > 0);
});
}
function pathIncludesOneOfAuthentifiers(path){
if (bAssetCondition)
throw Error('pathIncludesOneOfAuthentifiers called in asset condition');
for (var i=0; i<arrAuthentifierPaths.length; i++){
var authentifier_path = arrAuthentifierPaths[i];
if (authentifier_path.substr(0, path.length) === path)
return true;
}
return false;
}
function needToEvaluateNestedAddress(path){
if (!arrAuthentifierPaths) // no signatures, just validating a new definition
return true;
if (objValidationState.last_ball_mci < 1400000) // skipping is enabled after this mci
return true;
return pathIncludesOneOfAuthentifiers(path);
}
function evaluate(arr, path, bInNegation, cb){
complexity++;
if (complexity > constants.MAX_COMPLEXITY)
return cb("complexity exceeded at "+path);
if (!isArrayOfLength(arr, 2))
return cb("expression must be 2-element array");
var op = arr[0];
var args = arr[1];
switch(op){
case 'or':
case 'and':
if (!Array.isArray(args))
return cb(op+" args must be array");
if (args.length < 2)
return cb(op+" must have at least 2 options");
var count_options_with_sig = 0;
var index = -1;
async.eachSeries(
args,
function(arg, cb2){
index++;
evaluate(arg, path+'.'+index, bInNegation, function(err, bHasSig){
if (err)
return cb2(err);
if (bHasSig)
count_options_with_sig++;
cb2();
});
},
function(err){
if (err)
return cb(err);
cb(null, op === "and" && count_options_with_sig > 0 || op === "or" && count_options_with_sig === args.length);
}
);
break;
case 'r of set':
if (hasFieldsExcept(args, ["required", "set"]))
return cb("unknown fields in "+op);
if (!isPositiveInteger(args.required))
return cb("required must be positive");
if (!Array.isArray(args.set))
return cb("set must be array");
if (args.set.length < 2)
return cb("set must have at least 2 options");
if (args.required > args.set.length)
return cb("required must be <= than set length");
//if (args.required === args.set.length)
// return cb("required must be strictly less than set length, use and instead");
//if (args.required === 1)
// return cb("required must be more than 1, use or instead");
var count_options_with_sig = 0;
var index = -1;
async.eachSeries(
args.set,
function(arg, cb2){
index++;
evaluate(arg, path+'.'+index, bInNegation, function(err, bHasSig){
if (err)
return cb2(err);
if (bHasSig)
count_options_with_sig++;
cb2();
});
},
function(err){
if (err)
return cb(err);
var count_options_without_sig = args.set.length - count_options_with_sig;
cb(null, args.required > count_options_without_sig);
}
);
break;
case 'weighted and':
if (hasFieldsExcept(args, ["required", "set"]))
return cb("unknown fields in "+op);
if (!isPositiveInteger(args.required))
return cb("required must be positive");
if (!Array.isArray(args.set))
return cb("set must be array");
if (args.set.length < 2)
return cb("set must have at least 2 options");
var weight_of_options_with_sig = 0;
var total_weight = 0;
var index = -1;
async.eachSeries(
args.set,
function(arg, cb2){
index++;
if (hasFieldsExcept(arg, ["value", "weight"]))
return cb2("unknown fields in weighted set element");
if (!isPositiveInteger(arg.weight))
return cb2("weight must be positive int");
total_weight += arg.weight;
evaluate(arg.value, path+'.'+index, bInNegation, function(err, bHasSig){
if (err)
return cb2(err);
if (bHasSig)
weight_of_options_with_sig += arg.weight;
cb2();
});
},
function(err){
if (err)
return cb(err);
if (args.required > total_weight)
return cb("required must be <= than total weight");
var weight_of_options_without_sig = total_weight - weight_of_options_with_sig;
cb(null, args.required > weight_of_options_without_sig);
}
);
break;
case 'sig':
if (bInNegation)
return cb(op+" cannot be negated");
if (bAssetCondition)
return cb("asset condition cannot have "+op);
if (hasFieldsExcept(args, ["algo", "pubkey"]))
return cb("unknown fields in "+op);
if (args.algo === "secp256k1")
return cb("default algo must not be explicitly specified");
if ("algo" in args && args.algo !== "secp256k1")
return cb("unsupported sig algo");
if (!isStringOfLength(args.pubkey, constants.PUBKEY_LENGTH))
return cb("wrong pubkey length");
return cb(null, true);
case 'hash':
if (bInNegation)
return cb(op+" cannot be negated");
if (bAssetCondition)
return cb("asset condition cannot have "+op);
if (hasFieldsExcept(args, ["algo", "hash"]))
return cb("unknown fields in "+op);
if (args.algo === "sha256")
return cb("default algo must not be explicitly specified");
if ("algo" in args && args.algo !== "sha256")
return cb("unsupported hash algo");
if (!ValidationUtils.isValidBase64(args.hash, constants.HASH_LENGTH))
return cb("wrong base64 hash");
return cb();
case 'address':
if (objValidationState.bNoReferences)
return cb("no references allowed in address definition");
if (bInNegation)
return cb(op+" cannot be negated");
if (bAssetCondition)
return cb("asset condition cannot have "+op);
var other_address = args;
if (!isValidAddress(other_address))
return cb("invalid address");
storage.readDefinitionByAddress(conn, other_address, objValidationState.last_ball_mci, {
ifFound: function(arrInnerAddressDefinition){
console.log("inner address:", arrInnerAddressDefinition);
needToEvaluateNestedAddress(path) ? evaluate(arrInnerAddressDefinition, path, bInNegation, cb) : cb(null, true);
},
ifDefinitionNotFound: function(definition_chash){
// if (objValidationState.bAllowUnresolvedInnerDefinitions)
// return cb(null, true);
var bAllowUnresolvedInnerDefinitions = true;
var arrDefiningAuthors = objUnit.authors.filter(function(author){
return (author.address === other_address && author.definition && objectHash.getChash160(author.definition) === definition_chash);
});
if (arrDefiningAuthors.length === 0) // no address definition in the current unit
return bAllowUnresolvedInnerDefinitions ? cb(null, true) : cb("definition of inner address "+other_address+" not found");
if (arrDefiningAuthors.length > 1)
throw Error("more than 1 address definition");
var arrInnerAddressDefinition = arrDefiningAuthors[0].definition;
needToEvaluateNestedAddress(path) ? evaluate(arrInnerAddressDefinition, path, bInNegation, cb) : cb(null, true);
}
});
break;
case 'definition template':
// ['definition template', ['unit', {param1: 'value1'}]]
if (objValidationState.bNoReferences)
return cb("no references allowed in address definition");
if (!isArrayOfLength(args, 2))
return cb("2-element array expected in "+op);
var unit = args[0];
var params = args[1];
if (!isStringOfLength(unit, constants.HASH_LENGTH))
return cb("unit must be 44 bytes long");
if (!ValidationUtils.isNonemptyObject(params))
return cb("params must be non-empty object");
for (var key in params)
if (typeof params[key] !== "string" && typeof params[key] !== "number")
return cb("each param must be string or number");
conn.query(
"SELECT payload FROM messages JOIN units USING(unit) \n\
WHERE unit=? AND app='definition_template' AND main_chain_index<=? AND +sequence='good' AND is_stable=1",
[unit, objValidationState.last_ball_mci],
function(rows){
if (rows.length !== 1)
return cb("template not found or too many");
var template = rows[0].payload;
var arrTemplate = JSON.parse(template);
try{
var arrFilledTemplate = replaceInTemplate(arrTemplate, params);
console.log(require('util').inspect(arrFilledTemplate, {depth: null}));
}
catch(e){
if (e instanceof NoVarException)
return cb(e.toString());
else
throw e;
}
evaluate(arrFilledTemplate, path, bInNegation, cb);
}
);
break;
case 'seen address':
if (objValidationState.bNoReferences)
return cb("no references allowed in address definition");
if (!isValidAddress(args)) // it is ok if the address was never used yet
return cb("invalid seen address");
return cb();
case 'seen definition change':
case 'has definition change':
if (objValidationState.bNoReferences)
return cb("no references allowed in address definition");
if (!isArrayOfLength(args, 2))
return cb(op+" must have 2 args");
var changed_address = args[0];
var new_definition_chash = args[1];
if (bAssetCondition && (changed_address === 'this address' || new_definition_chash === 'this address'))
return cb("asset condition cannot reference this address in "+op);
if (!isValidAddress(changed_address) && changed_address !== 'this address') // it is ok if the address was never used yet
return cb("invalid changed address");
if (!isValidAddress(new_definition_chash) && new_definition_chash !== 'this address')
return cb("invalid new definition chash");
return cb();
case 'cosigned by':
if (bInNegation)
return cb(op+" cannot be negated");
if (!isValidAddress(args)) // it is ok if the address was never used yet
return cb("invalid cosigner address");
return cb();
case 'not':
evaluate(args, path, true, cb);
break;
case 'in data feed':
if (objValidationState.bNoReferences)
return cb("no references allowed in address definition");
if (!Array.isArray(args))
return cb(op+" arg must be array");
if (args.length !== 4 && args.length !== 5)
return cb(op+" must have 4 or 5 args");
var arrAddresses = args[0];
var feed_name = args[1];
var relation = args[2];
var value = args[3];
var min_mci = args[4];
if (!isNonemptyArray(arrAddresses))
return cb("no addresses in "+op);
for (var i=0; i<arrAddresses.length; i++)
if (!isValidAddress(arrAddresses[i])) // it is ok if the address was never used yet
return cb("address "+arrAddresses[i]+" not valid");
complexity += arrAddresses.length-1; // 1 complexity point for each address (1 point was already counted)
if (!isNonemptyString(relation))
return cb("no relation");
if (["=", ">", "<", ">=", "<=", "!="].indexOf(relation) === -1)
return cb("invalid relation: "+relation);
if (!isNonemptyString(feed_name))
return cb("no feed_name");
if (feed_name.length > constants.MAX_DATA_FEED_NAME_LENGTH)
return cb("feed_name too long");
if (typeof value === "string"){
if (!isNonemptyString(value))
return cb("no value");
if (value.length > constants.MAX_DATA_FEED_VALUE_LENGTH)
return cb("value too long");
}
else if (typeof value === "number"){
if (!isInteger(value))
return cb("no fractional values allowed");
}
else
return cb("invalid value");
if (typeof min_mci !== 'undefined' && !isNonnegativeInteger(min_mci))
return cb(op+": invalid min_mci");
return cb();
case 'in merkle':
if (bInNegation)
return cb(op+" cannot be negated");
if (objValidationState.bNoReferences)
return cb("no references allowed in address definition");
if (bAssetCondition)
return cb("asset condition cannot have "+op);
if (!Array.isArray(args))
return cb(op+" arg must be array");
if (args.length !== 3 && args.length !== 4)
return cb(op+" must have 3 or 4 args");
var arrAddresses = args[0];
var feed_name = args[1];
var element = args[2];
var min_mci = args[3];
if (!isNonemptyArray(arrAddresses))
return cb("no addresses in "+op);
for (var i=0; i<arrAddresses.length; i++)
if (!isValidAddress(arrAddresses[i])) // it is ok if the address was never used yet
return cb("address "+arrAddresses[i]+" not valid");
complexity += arrAddresses.length-1; // 1 complexity point for each address (1 point was already counted)
if (!isNonemptyString(feed_name))
return cb("no feed_name");
if (feed_name.length > constants.MAX_DATA_FEED_NAME_LENGTH)
return cb("feed_name too long");
// if (!isStringOfLength(element_hash, constants.HASH_LENGTH))
// return cb("incorrect length of element hash");
if (!element.match(/[\w ~,.\/\\;:!@#$%^&*\(\)=+\[\]\{\}<>\?|-]{1,100}/))
return cb("incorrect format of merkled element");
if (typeof min_mci !== 'undefined' && !isNonnegativeInteger(min_mci))
return cb(op+": invalid min_mci");
return cb();
case 'mci':
case 'age':
var relation = args[0];
var value = args[1];
if (!isNonemptyString(relation))
return cb("no relation");
if (["=", ">", "<", ">=", "<=", "!="].indexOf(relation) === -1)
return cb("invalid relation: "+relation);
if (!isNonnegativeInteger(value))
return cb(op+" must be a non-neg number");
break;
case 'has':
case 'has one':
case 'seen':
if (objValidationState.bNoReferences)
return cb("no references allowed in address definition");
var err = getFilterError(args);
if (err)
return cb(err);
if (op === 'seen'){
if (!args.address)
return cb('seen must specify address');
if (args.what === 'input' && (args.amount || args.amount_at_least || args.amount_at_most))
return cb('amount not allowed in seen input');
if ('own_funds' in args)
return cb('own_funds not allowed in seen');
}
if (!args.asset || args.asset === 'base' || bAssetCondition && args.asset === "this asset")
return cb();
determineIfAnyOfAssetsIsPrivate([args.asset], function(bPrivate){
if (bPrivate)
return cb("asset must be public");
cb();
});
break;
case 'has equal':
case 'has one equal':
if (objValidationState.bNoReferences)
return cb("no references allowed in address definition");
if (hasFieldsExcept(args, ["equal_fields", "search_criteria"]))
return cb("unknown fields in "+op);
if (!isNonemptyArray(args.equal_fields))
return cb("no equal_fields");
var assocUsedFields = {};
for (var i=0; i<args.equal_fields.length; i++){
var field = args.equal_fields[i];
if (assocUsedFields[field])
return cb("duplicate "+field);
assocUsedFields[field] = true;
if (["asset", "address", "amount", "type"].indexOf(field) === -1)
return cb("unknown field: "+field);
}
if (!isArrayOfLength(args.search_criteria, 2))
return cb("search_criteria must be 2-elements array");
var arrAssets = [];
for (var i=0; i<2; i++){
var filter = args.search_criteria[i];
var err = getFilterError(filter);
if (err)
return cb(err);
if (!(filter.asset || filter.asset === 'base' || bAssetCondition && filter.asset === "this asset"))
arrAssets.push(filter.asset);
}
if (args.equal_fields.indexOf("type") >= 0 && (args.search_criteria[0].what === "output" || args.search_criteria[1].what === "output"))
return cb("outputs cannot have type");
if (arrAssets.length === 0)
return cb();
determineIfAnyOfAssetsIsPrivate(arrAssets, function(bPrivate){
bPrivate ? cb("all assets must be public") : cb();
});
break;
case 'sum':
if (objValidationState.bNoReferences)
return cb("no references allowed in address definition");
if (hasFieldsExcept(args, ["filter", "equals", "at_least", "at_most"]))
return cb("unknown fields in "+op);
var err = getFilterError(args.filter);
if (err)
return cb(err);
if (args.filter.amount || args.filter.amount_at_least || args.filter.amount_at_most)
return cb("sum filter cannot restrict amounts");
if ("equals" in args && !isNonnegativeInteger(args.equals))
return cb("equals must be nonnegative int");
if ("at_least" in args && !isPositiveInteger(args.at_least))
return cb("at_least must be positive int");
if ("at_most" in args && !isPositiveInteger(args.at_most))
return cb("at_most must be positive int");
if ("equals" in args && ("at_least" in args || "at_most" in args))
return cb("can't have equals and at_least/at_most at the same time")
if (!("equals" in args) && !("at_least" in args) && !("at_most" in args))
return cb("at least one of equals, at_least, at_most must be specified");
if (!args.filter.asset || args.filter.asset === 'base' || bAssetCondition && args.filter.asset === "this asset")
return cb();
determineIfAnyOfAssetsIsPrivate([args.filter.asset], function(bPrivate){
bPrivate ? cb("asset must be public") : cb();
});
break;
default:
return cb("unknown op: "+op);
}
}
var complexity = 0;
evaluate(arrDefinition, 'r', false, function(err, bHasSig){
if (err)
return handleResult(err);
if (!bHasSig && !bAssetCondition)
return handleResult("each branch must have a signature");
if (complexity > constants.MAX_COMPLEXITY)
return handleResult("complexity exceeded");
handleResult();
});
}
function evaluateAssetCondition(conn, asset, arrDefinition, objUnit, objValidationState, cb){
validateAuthentifiers(conn, null, asset, arrDefinition, objUnit, objValidationState, null, cb);
}
// also validates address definition
function validateAuthentifiers(conn, address, this_asset, arrDefinition, objUnit, objValidationState, assocAuthentifiers, cb){
function evaluate(arr, path, cb2){
var op = arr[0];
var args = arr[1];
switch(op){
case 'or':
// ['or', [list of options]]
var res = false;
var index = -1;
async.eachSeries(
args,
function(arg, cb3){
index++;
evaluate(arg, path+'.'+index, function(arg_res){
res = res || arg_res;
cb3(); // check all members, even if required minimum already found
//res ? cb3("found") : cb3();
});
},
function(){
cb2(res);
}
);
break;
case 'and':
// ['and', [list of requirements]]
var res = true;
var index = -1;
async.eachSeries(
args,
function(arg, cb3){
index++;
evaluate(arg, path+'.'+index, function(arg_res){
res = res && arg_res;
cb3(); // check all members, even if required minimum already found
//res ? cb3() : cb3("found");
});
},
function(){
cb2(res);
}
);
break;
case 'r of set':
// ['r of set', {required: 2, set: [list of options]}]
var count = 0;
var index = -1;
async.eachSeries(
args.set,
function(arg, cb3){
index++;
evaluate(arg, path+'.'+index, function(arg_res){
if (arg_res)
count++;
cb3(); // check all members, even if required minimum already found, so that we don't allow invalid sig on unchecked path
//(count < args.required) ? cb3() : cb3("found");
});
},
function(){
cb2(count >= args.required);
}
);
break;
case 'weighted and':
// ['weighted and', {required: 15, set: [{value: boolean_expr, weight: 10}, {value: boolean_expr, weight: 20}]}]
var weight = 0;
var index = -1;
async.eachSeries(
args.set,
function(arg, cb3){
index++;
evaluate(arg.value, path+'.'+index, function(arg_res){
if (arg_res)
weight += arg.weight;
cb3(); // check all members, even if required minimum already found
//(weight < args.required) ? cb3() : cb3("found");
});
},
function(){
cb2(weight >= args.required);
}
);
break;
case 'sig':
// ['sig', {algo: 'secp256k1', pubkey: 'base64'}]
//console.log(op, path);
var signature = assocAuthentifiers[path];
if (!signature)
return cb2(false);
arrUsedPaths.push(path);
var algo = args.algo || 'secp256k1';
if (algo === 'secp256k1'){
if (objValidationState.bUnsigned && signature[0] === "-") // placeholder signature
return cb2(true);
var res = ecdsaSig.verify(objValidationState.unit_hash_to_sign, signature, args.pubkey);
if (!res)
fatal_error = "bad signature at path "+path;
cb2(res);
}
break;
case 'hash':
// ['hash', {algo: 'sha256', hash: 'base64'}]
if (!assocAuthentifiers[path])
return cb2(false);
arrUsedPaths.push(path);
var algo = args.algo || 'sha256';
if (algo === 'sha256'){
var res = (args.hash === crypto.createHash("sha256").update(assocAuthentifiers[path], "utf8").digest("base64"));
if (!res)
fatal_error = "bad hash at path "+path;
cb2(res);
}
break;
case 'address':
// ['address', 'BASE32']
var other_address = args;
storage.readDefinitionByAddress(conn, other_address, objValidationState.last_ball_mci, {
ifFound: function(arrInnerAddressDefinition){
evaluate(arrInnerAddressDefinition, path, cb2);
},
ifDefinitionNotFound: function(definition_chash){
var arrDefiningAuthors = objUnit.authors.filter(function(author){
return (author.address === other_address && author.definition && objectHash.getChash160(author.definition) === definition_chash);
});
if (arrDefiningAuthors.length === 0) // no definition in the current unit
return cb2(false);
if (arrDefiningAuthors.length > 1)
throw Error("more than 1 address definition");
var arrInnerAddressDefinition = arrDefiningAuthors[0].definition;
evaluate(arrInnerAddressDefinition, path, cb2);
}
});
break;
case 'definition template':
// ['definition template', ['unit', {param1: 'value1'}]]
var unit = args[0];
var params = args[1];
conn.query(
"SELECT payload FROM messages JOIN units USING(unit) \n\
WHERE unit=? AND app='definition_template' AND main_chain_index<=? AND +sequence='good' AND is_stable=1",
[unit, objValidationState.last_ball_mci],
function(rows){
if (rows.length !== 1)
throw Error("not 1 template");
var template = rows[0].payload;
var arrTemplate = JSON.parse(template);
var arrFilledTemplate = replaceInTemplate(arrTemplate, params);
evaluate(arrFilledTemplate, path, cb2);
}
);
break;
case 'seen address':
// ['seen address', 'BASE32']
var seen_address = args;
conn.query(
"SELECT 1 FROM unit_authors CROSS JOIN units USING(unit) \n\
WHERE address=? AND main_chain_index<=? AND sequence='good' AND is_stable=1 \n\
LIMIT 1",
[seen_address, objValidationState.last_ball_mci],
function(rows){
cb2(rows.length > 0);
}
);
break;
case 'seen definition change':
// ['seen definition change', ['BASE32', 'BASE32']]
var changed_address = args[0];
var new_definition_chash = args[1];
if (changed_address === 'this address')
changed_address = address;
if (new_definition_chash === 'this address')
new_definition_chash = address;
conn.query(
"SELECT 1 FROM address_definition_changes CROSS JOIN units USING(unit) \n\
WHERE address=? AND definition_chash=? AND main_chain_index<=? AND sequence='good' AND is_stable=1 \n\
LIMIT 1",
[changed_address, new_definition_chash, objValidationState.last_ball_mci],
function(rows){
cb2(rows.length > 0);
}
);
break;
case 'seen':
// ['seen', {what: 'input', asset: 'asset or base', type: 'transfer'|'issue', own_funds: true, amount_at_least: 123, amount_at_most: 123, amount: 123, address: 'BASE32'}]
var filter = args;
var sql = "SELECT 1 FROM "+filter.what+"s CROSS JOIN units USING(unit) \n\
LEFT JOIN assets ON asset=assets.unit \n\
WHERE main_chain_index<=? AND sequence='good' AND is_stable=1 AND (asset IS NULL OR is_private=0) ";
var params = [objValidationState.last_ball_mci];
if (filter.asset){
if (filter.asset === 'base')
sql += " AND asset IS NULL ";
else{
sql += " AND asset=? ";
params.push(filter.asset);
}
}
if (filter.type){
sql += " AND type=? ";
params.push(filter.type);
}
if (filter.address){
sql += " AND address=? ";
params.push((filter.address === 'this address') ? address : filter.address);
}
if (filter.what === 'output'){
if (filter.amount_at_least){
sql += " AND amount>=? ";
params.push(filter.amount_at_least);
}
if (filter.amount_at_most){
sql += " AND amount<=? ";
params.push(filter.amount_at_most);
}
if (filter.amount){
sql += " AND amount=? ";
params.push(filter.amount);
}
}
sql += " LIMIT 1";
conn.query(sql, params, function(rows){
cb2(rows.length > 0);
});
break;
case 'cosigned by':
// ['cosigned by', 'BASE32']
var cosigner_address = args;
var arrAuthorAddresses = objUnit.authors.map(function(author){ return author.address; });
console.log(op+" "+arrAuthorAddresses.indexOf(cosigner_address));
cb2(arrAuthorAddresses.indexOf(cosigner_address) >= 0);
break;
case 'not':
// useful for conditions such as: after timestamp but there's still no searched value in datafeed
// sig, hash, and address cannot be negated
evaluate(args, path, function(not_res){
cb2(!not_res);
});
break;
case 'in data feed':
// ['in data feed', [['BASE32'], 'data feed name', '=', 'expected value']]
var arrAddresses = args[0];
var feed_name = args[1];
var relation = args[2];
var value = args[3];
var min_mci = args[4] || 0;
var value_condition;
var index;
var params = [arrAddresses, feed_name];
if (typeof value === "string"){
index = 'byNameStringValue';
var isNumber = /^-?\d+\.?\d*$/.test(value);
if (isNumber){
var bForceNumericComparison = (['>','>=','<','<='].indexOf(relation) >= 0);
var plus_0 = bForceNumericComparison ? '+0' : '';
value_condition = '(value'+plus_0+relation+value+' OR int_value'+relation+value+')';
// params.push(value, value);
}
else{
value_condition = 'value'+relation+'?';
params.push(value);
}
}
else{
index = 'byNameIntValue';
value_condition = 'int_value'+relation+'?';
params.push(value);
}
params.push(objValidationState.last_ball_mci, min_mci);
conn.query(
"SELECT 1 FROM data_feeds "+db.forceIndex(index)+" CROSS JOIN units USING(unit) CROSS JOIN unit_authors USING(unit) \n\
WHERE address IN(?) AND feed_name=? AND "+value_condition+" \n\
AND main_chain_index<=? AND main_chain_index>=? AND sequence='good' AND is_stable=1 LIMIT 1",
params,
function(rows){
console.log(op+" "+feed_name+" "+rows.length);
cb2(rows.length > 0);
}
);
break;
case 'in merkle':
// ['in merkle', [['BASE32'], 'data feed name', 'expected value']]
if (!assocAuthentifiers[path])
return cb2(false);
arrUsedPaths.push(path);
var arrAddresses = args[0];
var feed_name = args[1];
var element = args[2];
var min_mci = args[3] || 0;
var serialized_proof = assocAuthentifiers[path];
var proof = merkle.deserializeMerkleProof(serialized_proof);
if (!merkle.verifyMerkleProof(element, proof)){
fatal_error = "bad merkle proof at path "+path;
return cb2(false);
}
conn.query(
"SELECT 1 FROM data_feeds CROSS JOIN units USING(unit) JOIN unit_authors USING(unit) \n\
WHERE address IN(?) AND feed_name=? AND value=? AND main_chain_index<=? AND main_chain_index>=? AND sequence='good' AND is_stable=1 \n\
LIMIT 1",
[arrAddresses, feed_name, proof.root, objValidationState.last_ball_mci, min_mci],
function(rows){
if (rows.length === 0)
fatal_error = "merkle proof at path "+path+" not found";
cb2(rows.length > 0);
}
);
break;
case 'mci':
var relation = args[0];
var mci = args[1];
switch(relation){
case '>': return cb2(objValidationState.last_ball_mci > mci);
case '>=': return cb2(objValidationState.last_ball_mci >= mci);
case '<': return cb2(objValidationState.last_ball_mci < mci);
case '<=': return cb2(objValidationState.last_ball_mci <= mci);
case '=': return cb2(objValidationState.last_ball_mci === mci);
default: throw Error('unknown relation in mci: '+relation);
}
break;
case 'age':
var relation = args[0];
var age = args[1];
var arrSrcUnits = [];
for (var i=0; i<objUnit.messages.length; i++){
var message = objUnit.messages[i];
if (message.app !== 'payment' || !message.payload)
continue;
var inputs = message.payload.inputs;
for (var j=0; j<inputs.length; j++){
var input = inputs[j];
if (!input.address) // augment should add it
throw Error('no input address');
if (input.address === address && arrSrcUnits.indexOf(input.unit) === -1)
arrSrcUnits.push(input.unit);
}
}
if (arrSrcUnits.length === 0) // not spending anything from our address
return cb2(false);
conn.query(
"SELECT 1 FROM units \n\
WHERE unit IN(?) AND ?"+relation+"main_chain_index AND main_chain_index<=? AND +sequence='good' AND is_stable=1",
[arrSrcUnits, objValidationState.last_ball_mci - age, objValidationState.last_ball_mci],
function(rows){
var bSatisfies = (rows.length === arrSrcUnits.length);
console.log(op+" "+bSatisfies);
cb2(bSatisfies);
}
);
break;
case 'has':
case 'has one':
// ['has', {what: 'input', asset: 'asset or base', type: 'transfer'|'issue', own_funds: true, amount_at_least: 123, amount_at_most: 123, amount: 123, address: 'BASE32'}]
// when an address is included (referenced from another address), own_funds refers to outer address' funds
augmentMessagesAndEvaluateFilter(op, args, function(res){
console.log(op+" "+res, args);
cb2(res);
});
break;
case 'has equal':
case 'has one equal':
// ['has equal', {equal_fields: ['address', 'amount'], search_criteria: [{what: 'output', asset: 'asset1', address: 'BASE32'}, {what: 'input', asset: 'asset2', type: 'issue', own_funds: true, address: 'ANOTHERBASE32'}]}]
augmentMessagesAndEvaluateFilter("has", args.search_criteria[0], function(res1, arrFirstObjects){
if (!res1)
return cb2(false);
augmentMessagesAndEvaluateFilter("has", args.search_criteria[1], function(res2, arrSecondObjects){
if (!res2)
return cb2(false);
var count_equal_pairs = 0;
for (var i=0; i<arrFirstObjects.length; i++)
for (var j=0; j<arrSecondObjects.length; j++)
if (!args.equal_fields.some(function(field){ return (arrFirstObjects[i][field] !== arrSecondObjects[j][field]); }))
count_equal_pairs++;
if (count_equal_pairs === 0)
return cb2(false);
if (op === "has one equal" && count_equal_pairs === 1)
return cb2(true);
if (op === "has equal" && count_equal_pairs > 0)
return cb2(true);
cb2(false);
});
});
break;
case 'sum':
// ['sum', {filter: {what: 'input', asset: 'asset or base', type: 'transfer'|'issue', own_funds: true, address: 'BASE32'}, at_least: 123, at_most: 123, equals: 123}]
augmentMessagesAndEvaluateFilter("has", args.filter, function(res, arrFoundObjects){
var sum = 0;
if (res)
for (var i=0; i<arrFoundObjects.length; i++)
sum += arrFoundObjects[i].amount;
console.log("sum="+sum);
if (typeof args.equals === "number" && sum === args.equals)
return cb2(true);
if (typeof args.at_least === "number" && sum >= args.at_least)
return cb2(true);
if (typeof args.at_most === "number" && sum <= args.at_most)
return cb2(true);
cb2(false);
});
break;
case 'has definition change':
// ['has definition change', ['BASE32', 'BASE32']]
var changed_address = args[0];
var new_definition_chash = args[1];
if (changed_address === 'this address')
changed_address = address;
if (new_definition_chash === 'this address')
new_definition_chash = address;
cb2(objUnit.messages.some(function(message){
if (message.app !== 'address_definition_change')
return false;
if (!message.payload)
return false;
if (message.payload.definition_chash !== new_definition_chash)
return false;
var address = message.payload.address || objUnit.authors[0].address;
return (address === changed_address);
}));
break;
}
}
function augmentMessagesAndEvaluateFilter(op, filter, handleResult){
function doEvaluateFilter(){
//console.log("augmented: ", objValidationState.arrAugmentedMessages[0].payload);
evaluateFilter(op, filter, handleResult);
}
if (!objValidationState.arrAugmentedMessages && filter.what === "input" && (filter.address || "own_funds" in filter || typeof filter.amount === "number" || typeof filter.amount_at_least === "number" || typeof filter.amount_at_most === "number"))
augmentMessages(doEvaluateFilter);
else
doEvaluateFilter();
}