How to use skipBlock method in ava

Best JavaScript code snippet using ava

skipchain.js

Source:skipchain.js

1"use strict";2const net = require("../../network/NSNet");3const misc = require("../misc");4const identity = require("../identity.js");5const crypto = require("crypto-browserify");6const co = require("co");7const skipchainID = "Skipchain";8class Client {9    /**10     * Returns a new skipchain client from a roster11     *12     * @param {cothority.Roster} roster the roster over which the client can talk to13     * @param {string} last know skipblock ID in hexadecimal format14     * @returns {SkipchainClient} A client that can talks to the skipchain services15     */16    constructor(group, roster, lastID) {17        this.lastRoster = roster;18        this.lastID = misc.hexToUint8Array(lastID);19        this.group = group;20    }21    /**22     * Returns the latest known skipblockID23     *24     * @returns {string} hexadecimal encoded skipblockID25     */26    get latestID() {27        return misc.uint8ArrayToHex(this.lastID);28    }29    /**30     * Returns the skipblock from the skipchain, given its id.31     *32     * @param {Uint8Array} skipblockID - the id of the block33     * @return {Promise<SkipBlock>} - a promise which resolves with the specified34     * block if correct35     */36    getSkipblock(skipblockID) {37        const request = {38            id: skipblockID39        };40        let socket = new net.RosterSocket(this.lastRoster, "Skipchain");41        return socket.send("GetSingleBlock", "SkipBlock", request);42    }43    /**44     * updateChain asks for the latest block of the skipchain with all intermediate blocks.45     * It automatically verifies the transition from the last known skipblock ID to the46     * latest one returned. It also automatically remembers the latest good known47     * roster from the latest block.48     * @return {Promise} A promise which resolves with the latest skipblock if49     * all checks pass.50     */51    getLatestBlock() {52        var fn = co.wrap(function* (client) {53            const requestStr = "GetUpdateChain";54            const responseStr = "GetUpdateChainReply";55            const request = {56                latestID: client.lastID57            };58            // XXX  somewhat hackyish but sets a realistic upper bound59            const initLength = client.lastRoster.length;60            var nbErr = 0;61            while (nbErr < initLength) {62                // fetches the data with the current roster63                client.socket = new net.RosterSocket(client.lastRoster, skipchainID);64                var data = null;65                try {66                    data = yield client.socket.send(requestStr, responseStr, request);67                } catch (err) {68                    return Promise.reject(err);69                }70                // verifies it's all correct71                var lastBlock;72                try {73                    lastBlock = client.verifyUpdateChainReply(data);74                } catch (err) {75                    console.log("error in the process : " + err);76                    // tries again with random conodes77                    nbErr++;78                    continue;79                }80                // update the roster81                client.lastRoster = identity.Roster.fromProtobuf(lastBlock.roster);82                client.lastID = lastBlock.hash;83                // if there is nothing new stop !84                if (!lastBlock.forward || lastBlock.forward.length == 0) {85                    // no forward block means it's the latest block86                    return Promise.resolve(lastBlock);87                }88            }89            return Promise.reject(nbErr + " occured retrieving the latest block...");90        });91        return fn(this);92    }93    /**94     * verifies if the list of skipblock given is correct and if it links with the last know given skipblockID.95     *96     * @param {Uint8Array} lastID last know skipblock ID97     * @param {GetUpdateChainReply} updateChainReply the response from a conode containing the blocks98     * @returns {SkipBlock} the most recent valid block in the chain99     * @throws {Error} throw an error if the chain is invalid100     */101    verifyUpdateChainReply(updateChainReply) {102        const blocks = updateChainReply.update;103        if (blocks.length == 0) {104            throw new Error("no block returned in the chain");105        }106        // first verify the first block is the one we know107        const first = blocks[0];108        const id = new Uint8Array(first.hash);109        if (!misc.uint8ArrayCompare(id, this.lastID)) {110            throw new Error("the first ID is not the one we have");111        }112        if (blocks.length == 1) {113            return first;114        }115        // then check the block links consecutively116        var currBlock = first;117        for (var i = 1; i < blocks.length; i++) {118            console.log(i + "/" + blocks.length);119            const nextBlock = blocks[i];120            const forwardLinks = currBlock.forward;121            if (forwardLinks.length == 0) {122                //throw new Error("No forward links included in the skipblocks");123                return currBlock;124            }125            if (false) {126                // only take the highest link since we move "as fast as possible" on127                // the skipchain, i.e. we skip the biggest number of blocks128                const lastLink = forwardLinks[forwardLinks.length - 1];129                const roster = identity.Roster.fromProtobuf(currBlock.roster);130                var err = this.verifyForwardLink(roster, lastLink);131                //if (err) console.log("error verifying: " + err);132                if (err) {133                    throw err;134                }135            }136            // move to the next block137            currBlock = nextBlock;138        }139        return currBlock;140    }141    /**142     * verify if the link is a valid signature over the given message for the given roster143     *144     * @param {Roster} the roster who created the signature145     * @param {Uint8Array} the message146     * @param {Object} BlockLink object (protobuf)147     * @returns {error} Error in case a link is wrong148     */149    verifyForwardLink(roster, flink) {150        // check that the message is correct151        const message = flink.signature.msg;152        const h = crypto.createHash("sha256");153        h.update(flink.from);154        h.update(flink.to);155        if (flink.roster !== undefined) {156            return new Error(157                "forwardlink verification with a roster change is not implemented yet"158            );159        }160        let b = h.digest();161        let hash = new Uint8Array(162            b.buffer,163            b.byteOffset,164            b.byteLength / Uint8Array.BYTES_PER_ELEMENT165        );166        if (!misc.uint8ArrayCompare(hash, message, false)) {167            return new Error("recreated message does not match");168        }169        // verify the signature length and get the bitmask170        var bftSig = flink.signature;171        const sigLen = bftSig.sig.length;172        const pointLen = this.group.pointLen();173        const scalarLen = this.group.scalarLen();174        if (sigLen < pointLen + scalarLen)175            return new Error("signature length invalid");176        // compute the bitmask and the reduced public key177        const bitmask = bftSig.sig.slice(pointLen + scalarLen, bftSig.sig.length);178        const bitmaskLength = misc.getBitmaskLength(bitmask);179        const expectedBitmaskLength = roster.length + 8 - roster.length % 8;180        if (bitmaskLength > expectedBitmaskLength)181            return new Error("bitmask length invalid");182        const threshold = (roster.length - 1) / 3;183        // all indices of the absent nodes from the roster184        const absenteesIdx = misc.getClearBits(bitmask, roster.length);185        if (absenteesIdx.length > threshold) {186            return new Error("nb of signers absent above threshold");187        }188        // get the roster aggregate key and subtract any exception listed.189        const aggregate = roster.aggregateKey();190        //compute reduced public key191        absenteesIdx.forEach(idx => {192            aggregate.sub(aggregate, roster.get(idx).pub);193        });194        // XXX suppose c = H(R || Pub || m) , with R being the FULL commitment195        // that is being generated at challenge time and the signature is196        // R' || s with R' being the reduced commitment197        // R' = R - SUM(exception-commitment)198        const R = this.group.point();199        R.unmarshalBinary(bftSig.sig.slice(0, pointLen));200        const s = this.group.scalar();201        s.unmarshalBinary(bftSig.sig.slice(pointLen, pointLen + scalarLen));202        // recompute challenge = H(R || P || M)203        // with P being the roster aggregate public key minus the public keys204        // indicated by the bitmask205        const challenge = hashSchnorr(206            this.group,207            R.marshalBinary(),208            aggregate.marshalBinary(),209            message210        );211        // compute -(c * Aggregate)212        const mca = this.group.point().neg(aggregate);213        mca.mul(challenge, mca);214        // compute sG215        const left = this.group.point().mul(s, null);216        left.add(left, mca);217        // compute R + challenge * Public218        //const right = this.group.point().mul(challenge, aggregate);219        //right.add(right, R);220        const right = R;221        if (!right.equal(left)) {222            return new Error("invalid signature");223        }224        return null;225    }226}227/**228 *229 * hashSchnorr returns a scalar out of hashing the given inputs.230 * @param {...Uint8Array} inputs231 * @return {Scalar}232 *233 **/234function hashSchnorr(suite, ...inputs) {235    const h = crypto.createHash("sha256");236    for (let i of inputs) {237        h.update(i);238    }239    const scalar = suite.scalar();240    scalar.setBytes(Uint8Array.from(h.digest()));241    return scalar;242}...

c0966fcef8e47371687e4bb0e2527cb2b77ce185_0_1.js

Source:c0966fcef8e47371687e4bb0e2527cb2b77ce185_0_1.js

1f    var tag, pre, __ref;2    tag = token[0];3    if (tag === '=>' || tag === 'POST_IF') {4      return true;5    }6    if (!skipBlock) {7      if (token.alias && ((__ref = token[1]) === '&&' || __ref === '||') || (tag === 'TO' || tag === 'BY' || tag === 'IMPLEMENTS')) {8        return true;9      }10    }11    pre = tokens[i - 1];12    switch (tag) {13    case 'NEWLINE':14      return pre[0] !== ',';15    case 'DOT':16    case '?':17      return !skipBlock && (pre.spaced || pre[0] === 'DEDENT');18    case 'SWITCH':19      seenSwitch = true;20      // fallthrough21    case 'IF':22    case 'CLASS':23    case 'FUNCTION':24    case 'LET':25    case 'WITH':26      skipBlock = true;27      break;28    case 'CASE':29      if (seenSwitch) {30        skipBlock = true;31      } else {32        return true;33      }34      break;35    case 'INDENT':36      if (skipBlock) {37        return skipBlock = false;38      }39      return (__ref = pre[0]) !== '{' && __ref !== '[' && __ref !== ',' && __ref !== '->' && __ref !== ':' && __ref !== 'ELSE' && __ref !== 'ASSIGN' && __ref !== 'IMPORT' && __ref !== 'UNARY' && __ref !== 'DEFAULT' && __ref !== 'TRY' && __ref !== 'CATCH' && __ref !== 'FINALLY' && __ref !== 'HURL' && __ref !== 'DO';40    case 'WHILE':41      if (token.done) {42        return false;43      }44      // fallthrough45    case 'FOR':46      skipBlock = true;47      return able(tokens, i) || pre[0] === 'CREMENT' || pre[0] === '...' && pre.spaced;48    }49    return false;...

3bd88b51dcdac1ac4196c9ebb50456ab76b0dd7f_0_3.js

Source:3bd88b51dcdac1ac4196c9ebb50456ab76b0dd7f_0_3.js

1f    var tag, pre, __ref;2    tag = token[0];3    if ((tag === 'POST_IF' || tag === '=>') || !skipBlock && token.alias && ((__ref = token[1]) === '&&' || __ref === '||')) {4      return true;5    }6    pre = tokens[i - 1];7    switch (tag) {8    case 'NEWLINE':9      return pre[0] !== ',';10    case 'DOT':11    case '?':12      return !skipBlock && (pre.spaced || pre[0] === 'DEDENT');13    case 'SWITCH':14      seenSwitch = true;15      // fallthrough16    case 'IF':17    case 'CLASS':18    case 'FUNCTION':19    case 'LET':20    case 'WITH':21      skipBlock = true;22      break;23    case 'CASE':24      if (seenSwitch) {25        skipBlock = true;26      } else {27        return true;28      }29      break;30    case 'INDENT':31      if (skipBlock) {32        return skipBlock = false;33      }34      return (__ref = pre[0]) !== '{' && __ref !== '[' && __ref !== ',' && __ref !== '->' && __ref !== ':' && __ref !== 'ELSE' && __ref !== 'ASSIGN' && __ref !== 'IMPORT' && __ref !== 'UNARY' && __ref !== 'DEFAULT' && __ref !== 'TRY' && __ref !== 'CATCH' && __ref !== 'FINALLY' && __ref !== 'HURL' && __ref !== 'DO';35    case 'WHILE':36      if (token.done) {37        return false;38      }39      // fallthrough40    case 'FOR':41      skipBlock = true;42      return able(tokens, i) || pre[0] === 'CREMENT';43    }44    return false;...

Using AI Code Generation

1const { Avalanche } = require("avalanche")2const { AVMAPI, KeyChain } = require("avalanche/dist/apis/avm")3const { BinTools } = require("avalanche/dist/utils")4const { Buffer } = require("buffer")5const { Defaults } = require("avalanche/dist/utils")6const { UnixNow } = require("avalanche/dist/utils")7const { iAVMUTXOResponse } = require("avalanche/dist/apis/avm/interfaces")8const { UTXOSet } = require("avalanche/dist/apis/avm/utxos")9const avalanche = new Avalanche(ip, port, protocol, networkID)10const xChain = avalanche.XChain()11const cChain = avalanche.CChain()12const bintools = BinTools.getInstance()13const avm = new AVMAPI(xChain, cChain)14const keyChain = new KeyChain(networkID, 12345)15const xKeychain = avm.keyChain()16const xChainBlockchainID = avm.getBlockchainID()17const cChainBlockchainID = cChain.getBlockchainID()18const cKeychain = cChain.keyChain()19const main = async () => {

Using AI Code Generation

1const avalanche = require("avalanche");2const ip = "localhost";3const port = 9650;4const protocol = "http";5const networkID = 12345;6const avalancheClient = new avalanche.Avalanche(ip, port, protocol, networkID);7const xchain = avalancheClient.XChain();8const bintools = avalanche.BinTools.getInstance();9const myKeychain = xchain.keyChain();10const myKeychain1 = xchain.keyChain();11const myKeychain2 = xchain.keyChain();12const myKeychain3 = xchain.keyChain();13const myKeychain4 = xchain.keyChain();14const myKeychain5 = xchain.keyChain();15const myKeychain6 = xchain.keyChain();16const myKeychain7 = xchain.keyChain();17const myKeychain8 = xchain.keyChain();18const myKeychain9 = xchain.keyChain();19const myKeychain10 = xchain.keyChain();20const myKeychain11 = xchain.keyChain();21const myKeychain12 = xchain.keyChain();22const myKeychain13 = xchain.keyChain();23const myKeychain14 = xchain.keyChain();24const myKeychain15 = xchain.keyChain();25const myKeychain16 = xchain.keyChain();26const myKeychain17 = xchain.keyChain();27const myKeychain18 = xchain.keyChain();28const myKeychain19 = xchain.keyChain();29const myKeychain20 = xchain.keyChain();30const myKeychain21 = xchain.keyChain();31const myKeychain22 = xchain.keyChain();32const myKeychain23 = xchain.keyChain();33const myKeychain24 = xchain.keyChain();34const myKeychain25 = xchain.keyChain();35const myKeychain26 = xchain.keyChain();36const myKeychain27 = xchain.keyChain();37const myKeychain28 = xchain.keyChain();38const myKeychain29 = xchain.keyChain();39const myKeychain30 = xchain.keyChain();40const myKeychain31 = xchain.keyChain();41const myKeychain32 = xchain.keyChain();42const myKeychain33 = xchain.keyChain();43const myKeychain34 = xchain.keyChain();44const myKeychain35 = xchain.keyChain();45const myKeychain36 = xchain.keyChain();46const myKeychain37 = xchain.keyChain();

Using AI Code Generation

1const avalanche = require("avalanche");2const avm = avalanche.AVM();3avm.skipBlock();4const avalanche = require("avalanche");5const avm = avalanche.AVM();6avm.skipBlock();7const avalanche = require("avalanche");8const avm = avalanche.AVM();9avm.skipBlock();10const avalanche = require("avalanche");11const avm = avalanche.AVM();12avm.skipBlock();13const avalanche = require("avalanche");14const avm = avalanche.AVM();15avm.skipBlock();16const avalanche = require("avalanche");17const avm = avalanche.AVM();18avm.skipBlock();19const avalanche = require("avalanche");20const avm = avalanche.AVM();21avm.skipBlock();22const avalanche = require("avalanche");23const avm = avalanche.AVM();24avm.skipBlock();25const avalanche = require("avalanche");26const avm = avalanche.AVM();27avm.skipBlock();28const avalanche = require("avalanche");29const avm = avalanche.AVM();30avm.skipBlock();31const avalanche = require("avalanche");32const avm = avalanche.AVM();33avm.skipBlock();34const avalanche = require("avalanche");35const avm = avalanche.AVM();36avm.skipBlock();37const avalanche = require("avalanche");38const avm = avalanche.AVM();39avm.skipBlock();

Using AI Code Generation

1var availableBlocks = require('./availableBlocks.js');2var skipBlock = availableBlocks.skipBlock;3skipBlock();4var skipBlock = function () {5    console.log('skipBlock');6}7module.exports.skipBlock = skipBlock;

Using AI Code Generation

1var availableBlocks = require('availableBlocks');2availableBlocks.skipBlock();3module.exports = {4    skipBlock: function() {5    }6}7module.exports = {8    skipBlock: function() {9    },10    addBlock: function() {11    }12}13var availableBlocks = require('availableBlocks');14availableBlocks.skipBlock();15availableBlocks.addBlock();16module.exports = {17    addNumbers: function(num1, num2) {

Using AI Code Generation

1const availableBlocks = require('./availableBlocks');2const block = availableBlocks.skipBlock(availableBlocks.availableBlocks, 1);3console.log(block);4const availableBlocks = require('./availableBlocks');5module.exports = {6skipBlock: (availableBlocks, skip) => {7    if (skip > availableBlocks.length) {8        return null;9    }10    return availableBlocks[skip - 1];11}12}13    {14    },15    {16    },17    {18    }19I am trying to create a function that will return the nth element of an array. I have the function in a separate file (availableBlocks.js) and I am trying to use it in another file (test.js). The code is as follows:20const availableBlocks = require('./availableBlocks');21const block = availableBlocks.skipBlock(availableBlocks.availableBlocks, 1);22console.log(block);23const availableBlocks = require('./availableBlocks');24module.exports = {25skipBlock: (availableBlocks, skip) => {26    if (skip > availableBlocks.length) {27        return null;28    }29    return availableBlocks[skip - 1];30}31}32    {33    },34    {35    },36    {37    }

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