Method signMessage

js/src/pacifica.js:3194–3203

(header, payload, privateKey)

        return this.json(sorted);
    }
    signMessage(header, payload, privateKey) {
        const message = this.prepareMessage(header, payload);
        const messageBytes = this.encode(message);
        const secretBytes = this.base58ToBinary(privateKey);
        const seed = this.arraySlice(secretBytes, 0, 32);
        const signatureBase64 = eddsa(messageBytes, seed, ed25519);
        const signatureBinary = this.base64ToBinary(signatureBase64);
        const signatureBase58 = this.binaryToBase58(signatureBinary);
        return signatureBase58;
    }
    postActionRequest(operationType, sigPayload, params) {
        this.checkRequiredCredentials(); // check credentials every post action
        if (operationType === 'undefined') {